import { INGREDIENTS, RECIPES } from '../data/catalog.js?v=8';
import { MEAL_SLOTS } from '../planner/mealSlots.js';
import {
    addMonths,
    addWeeks,
    sameMonth,
    startOfDay,
    startOfMonth,
    startOfWeekMonday,
    weekContains,
} from '../services/dateUtils.js';
import {
    computeEntryNutrition,
    computeFullForecast,
    countDayShortfalls,
    dayHasAnyMeal,
    sumDayNutrition,
} from '../services/planIngredients.js?v=4';
import { addOrMergeShoppingLines, loadPantry } from '../services/pantryShopping.js?v=2';
import {
    dateKey,
    getDayPlan,
    loadPlans,
    newPlanEntryId,
    savePlans,
} from '../services/planStore.js?v=2';
import {
    CALENDAR_HANDLE_CLASS,
    CALENDAR_MONTHS_SHORT,
    bindCalendarDayClicks,
    createCalendarTopbarHTML,
    createCalendarWeekdayHeaderHTML,
    formatCalendarMonthYear,
    formatCalendarSelectedDate,
    isCalendarOnToday,
    renderCollapsibleCalendar,
    syncCalendarTodayButton,
    syncCollapsibleCalendarMode,
} from '../ui/mealCalendar.js?v=1';

const WEEKDAYS_LONG = [
    'Niedziela', 'Poniedziałek', 'Wtorek', 'Środa', 'Czwartek', 'Piątek', 'Sobota',
];

const PLANNER_SHEET_BOTTOM_INSET = '5.25rem';
const PLANNER_SHEET_MAX_HEIGHT = '70vh';
const PLANNER_SHEET_OFF_TRANSFORM = `translateY(calc(100% + ${PLANNER_SHEET_BOTTOM_INSET}))`;

function recipesForSlot(slotId) {
    return Object.values(RECIPES).filter((r) => r.allowedSlots.includes(slotId));
}

function syncTodayButton(mode, weekStart, monthAnchor, selected) {
    syncCalendarTodayButton(
        document.getElementById('cal-go-today'),
        isCalendarOnToday(mode, weekStart, monthAnchor, selected),
    );
}

export function getMealPlannerHTML() {
    return `
    <div id="planner-view" class="hidden flex flex-col h-full absolute inset-0 overflow-hidden bg-[#2d2e2b] z-10 pb-24">
        <div id="planner-cal-bar" class="shrink-0 bg-[#2d2e2b] border-b border-[#444442] mt-3 relative z-10">
            ${createCalendarTopbarHTML({
        titleId: 'cal-period-label',
        prevId: 'cal-prev',
        todayId: 'cal-go-today',
        nextId: 'cal-next',
        titleClass: 'text-[18px] font-semibold text-[#ddd6ca] leading-none tracking-[-0.03em]',
    })}
            <div id="calendar-swipe-zone" class="overflow-x-hidden bg-[#2d2e2b]" style="touch-action: none">
                <div id="calendar-week-wrap" class="px-3 overflow-x-hidden bg-[#2d2e2b]" style="overflow: hidden; max-height: 10rem; opacity: 1; padding-bottom: 0.75rem">
                    ${createCalendarWeekdayHeaderHTML()}
                    <div id="calendar-week-grid" class="grid grid-cols-7 gap-1.5 max-w-full overflow-x-hidden"></div>
                </div>
                <div id="calendar-month-wrap" class="px-3 bg-[#2d2e2b]" style="overflow: hidden; max-height: 0; opacity: 0; padding-bottom: 0">
                    ${createCalendarWeekdayHeaderHTML()}
                    <div id="calendar-month-grid" class="grid grid-cols-7 gap-1.5"></div>
                </div>
                <div id="calendar-drag-handle" class="flex items-center justify-center pb-2 pt-0.5">
                    <span id="calendar-handle-icon" class="${CALENDAR_HANDLE_CLASS}" aria-hidden="true"></span>
                </div>
            </div>
        </div>

        <div id="planner-scroll" class="flex-1 overflow-y-auto px-4 pt-3 pb-4 bg-[#2d2e2b]">
            <div id="planner-summary-card" class="mb-3">
                <div class="h-full flex flex-col" style="background:#2d2e2b !important; background-image:none !important; box-shadow:none !important;">
                    <p class="text-[10px] font-bold text-gray-400 uppercase tracking-wider mb-2">Wartości odżywcze</p>
                    <div class="flex-1 flex items-center">
                        <div class="grid grid-cols-4 gap-1.5 w-full">
                            <div class="rounded-xl px-2 py-1.5 text-center" style="background:#393937;">
                                <p id="planner-nutrition-kcal" class="text-[15px] font-bold text-gray-100 tabular-nums leading-tight">—</p>
                                <p class="text-[9px] text-gray-500 font-medium">kcal</p>
                            </div>
                            <div class="rounded-xl px-2 py-1.5 text-center" style="background:#393937;">
                                <p id="planner-nutrition-p" class="text-[15px] font-bold text-blue-400 tabular-nums leading-tight">—</p>
                                <p class="text-[9px] text-gray-500 font-medium">białko</p>
                            </div>
                            <div class="rounded-xl px-2 py-1.5 text-center" style="background:#393937;">
                                <p id="planner-nutrition-f" class="text-[15px] font-bold text-amber-400 tabular-nums leading-tight">—</p>
                                <p class="text-[9px] text-gray-500 font-medium">tłuszcz</p>
                            </div>
                            <div class="rounded-xl px-2 py-1.5 text-center" style="background:#393937;">
                                <p id="planner-nutrition-c" class="text-[15px] font-bold text-orange-400 tabular-nums leading-tight">—</p>
                                <p class="text-[9px] text-gray-500 font-medium">węgl.</p>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <button type="button" id="planner-open-ingredients" class="hidden w-full mb-3 flex items-center justify-center gap-2 py-2.5 rounded-xl border border-dashed border-[#444442] bg-[#2d2e2b] text-[13px] font-semibold text-[#d7d2c8] hover:border-[#6d6c67] hover:bg-[#3a3a37] transition-colors">
                <i class="fas fa-shopping-basket text-[#9b978f] text-xs" aria-hidden="true"></i>
                Składniki na ten dzień
            </button>
            <div id="planner-meal-slots" class="space-y-3 pb-2 bg-[#2d2e2b]"></div>
        </div>

        <div id="planner-picker-backdrop" class="absolute left-0 right-0 top-0 z-[45] bg-black/45 hidden opacity-0 transition-opacity duration-200" style="bottom: ${PLANNER_SHEET_BOTTOM_INSET}" aria-hidden="true"></div>
        <div id="planner-picker-sheet" class="absolute left-0 right-0 z-[50] rounded-t-3xl shadow-[0_-10px_40px_rgba(0,0,0,0.12)] flex flex-col will-change-transform" style="visibility: hidden; bottom: ${PLANNER_SHEET_BOTTOM_INSET}; height: auto; max-height: ${PLANNER_SHEET_MAX_HEIGHT}; transform: ${PLANNER_SHEET_OFF_TRANSFORM}; transition: transform 300ms cubic-bezier(0.32, 0.72, 0, 1); background:#2d2e2b !important; background-image:none !important;" role="dialog" aria-labelledby="planner-picker-title" aria-modal="true">
            <div class="shrink-0 px-4 pt-3 pb-2 border-b border-[#444442] touch-none cursor-grab active:cursor-grabbing select-none" data-planner-sheet-drag-zone aria-label="Przeciągnij w dół, by zamknąć">
                <div class="w-10 h-1 bg-[#6d6c67]/75 rounded-full mx-auto mb-2.5" aria-hidden="true"></div>
                <h2 id="planner-picker-title" class="text-[15px] font-bold text-[#ddd6ca] leading-tight pr-2">Wybierz przepis</h2>
                <p id="planner-picker-sub" class="text-[11px] text-[#9b978f] mt-1"></p>
            </div>
            <div class="shrink-0 px-4 pt-2 pb-2">
                <input type="text" id="planner-picker-search" class="w-full rounded-xl border border-[#444442] bg-[#2f2f2d] px-3 py-2 text-sm text-[#ddd6ca] outline-none focus:border-[#6d6c67] placeholder:text-[#7d7a74]" placeholder="Szukaj przepisu…" />
            </div>
            <div id="planner-picker-list" class="min-h-0 flex-1 overflow-y-auto no-scrollbar px-4 py-2.5 pb-8 space-y-2"></div>
        </div>

        <div id="planner-ing-backdrop" class="absolute left-0 right-0 top-0 z-[45] bg-black/45 hidden opacity-0 transition-opacity duration-200" style="bottom: ${PLANNER_SHEET_BOTTOM_INSET}" aria-hidden="true"></div>
        <div id="planner-ing-sheet" class="absolute left-0 right-0 z-[50] rounded-t-3xl shadow-[0_-10px_40px_rgba(0,0,0,0.12)] flex flex-col will-change-transform" style="visibility: hidden; bottom: ${PLANNER_SHEET_BOTTOM_INSET}; height: auto; max-height: ${PLANNER_SHEET_MAX_HEIGHT}; transform: ${PLANNER_SHEET_OFF_TRANSFORM}; transition: transform 300ms cubic-bezier(0.32, 0.72, 0, 1); background:#2d2e2b !important; background-image:none !important;" role="dialog" aria-labelledby="planner-ing-title" aria-modal="true">
            <div class="shrink-0 px-4 pt-3 pb-2 border-b border-[#444442] touch-none cursor-grab active:cursor-grabbing select-none" data-planner-sheet-drag-zone aria-label="Przeciągnij w dół, by zamknąć">
                <div class="w-10 h-1 bg-[#6d6c67]/75 rounded-full mx-auto mb-2.5" aria-hidden="true"></div>
                <h2 id="planner-ing-title" class="text-[15px] font-bold text-[#ddd6ca] leading-tight pr-2">Składniki i spiżarnia</h2>
                <p id="planner-ing-sub" class="text-[11px] text-[#9b978f] mt-1">Porównanie potrzeb z zapasami.</p>
            </div>
            <div id="planner-ing-body" class="min-h-0 flex-1 overflow-y-auto no-scrollbar px-4 py-2 pb-2"></div>
            <div id="planner-ing-footer" class="shrink-0 p-4 pt-2 pb-5 border-t border-[#444442] bg-[#2d2e2b] space-y-2">
                <button type="button" id="planner-ing-add-all" class="w-full bg-gray-900 hover:bg-black text-white py-3 rounded-xl font-semibold shadow-sm transition-colors text-[13px] flex items-center justify-center gap-2">
                    <i class="fas fa-cart-plus text-xs" aria-hidden="true"></i>
                    Dodaj braki na dziś do listy
                </button>
                <button type="button" id="planner-ing-add-btn" class="hidden w-full border border-[#444442] bg-[#2d2e2b] text-[#d7d2c8] hover:bg-[#3a3a37] py-2.5 rounded-xl font-semibold text-[13px] flex items-center justify-center gap-2 transition-colors">
                    <i class="fas fa-calendar-week text-[#9b978f] text-[11px]" aria-hidden="true"></i>
                    Dodaj braki na cały tydzień
                </button>
            </div>
        </div>

        <div id="planner-toast" class="pointer-events-none absolute left-4 right-4 bottom-28 z-[55] opacity-0 translate-y-2 transition-all duration-300" role="status">
            <div class="rounded-xl bg-gray-900 text-white text-sm font-medium px-4 py-3 shadow-lg text-center" id="planner-toast-text"></div>
        </div>
    </div>
    `;
}

function updatePeriodLabel(mode, weekStart, monthAnchor, selected) {
    const el = document.getElementById('cal-period-label');
    if (!el) return;

    if (mode === 'week') {
        el.textContent = formatCalendarSelectedDate(selected);
    } else {
        el.textContent = formatCalendarMonthYear(monthAnchor);
    }
}

function syncModeToggle(mode) {
    syncCollapsibleCalendarMode({
        mode,
        weekWrapEl: document.getElementById('calendar-week-wrap'),
        monthWrapEl: document.getElementById('calendar-month-wrap'),
        handleEl: document.getElementById('calendar-handle-icon'),
    });
}

function bindCalendarSwipeGesture(state, rerender) {
    const zone = document.getElementById('calendar-swipe-zone');
    if (!zone) return;

    let startY = 0;
    let ptrId = null;
    let moved = false;

    zone.addEventListener('pointerdown', (e) => {
        if (ptrId !== null) return;
        startY = e.clientY;
        ptrId = e.pointerId;
        moved = false;
    });

    zone.addEventListener('pointermove', (e) => {
        if (e.pointerId !== ptrId) return;
        if (Math.abs(e.clientY - startY) > 10) moved = true;
    });

    zone.addEventListener('pointerup', (e) => {
        if (e.pointerId !== ptrId) return;
        const dy = e.clientY - startY;
        ptrId = null;

        if (!moved || Math.abs(dy) < 30) return;

        let switched = false;
        if (state.mode === 'week' && dy > 30) {
            state.mode = 'month';
            state.monthAnchor = startOfMonth(state.selected);
            switched = true;
        } else if (state.mode === 'month' && dy < -30) {
            state.mode = 'week';
            state.weekStart = startOfWeekMonday(state.selected);
            switched = true;
        }

        if (switched) {
            zone.addEventListener('click', (ev) => {
                ev.stopPropagation();
                ev.preventDefault();
            }, { capture: true, once: true });
            rerender();
        }
    });

    zone.addEventListener('pointercancel', () => {
        ptrId = null;
        moved = false;
    });
}

function showPlannerToast(message) {
    const wrap = document.getElementById('planner-toast');
    const text = document.getElementById('planner-toast-text');
    if (!wrap || !text) return;
    text.textContent = message;
    wrap.classList.remove('opacity-0', 'translate-y-2');
    wrap.classList.add('opacity-100', 'translate-y-0');
    clearTimeout(showPlannerToast._t);
    showPlannerToast._t = setTimeout(() => {
        wrap.classList.add('opacity-0', 'translate-y-2');
        wrap.classList.remove('opacity-100', 'translate-y-0');
    }, 2600);
}

function openSheet(backdrop, sheet) {
    if (!backdrop || !sheet) return;
    sheet.style.visibility = 'visible';
    sheet.style.transition = 'transform 300ms cubic-bezier(0.32, 0.72, 0, 1)';
    sheet.style.transform = 'translateY(0)';
    backdrop.classList.remove('hidden');
    requestAnimationFrame(() => {
        backdrop.classList.remove('opacity-0');
    });
}

function closeSheet(backdrop, sheet) {
    if (!backdrop || !sheet) return;
    sheet.style.transition = 'transform 300ms cubic-bezier(0.32, 0.72, 0, 1)';
    sheet.style.transform = PLANNER_SHEET_OFF_TRANSFORM;
    backdrop.classList.add('opacity-0');
    setTimeout(() => {
        backdrop.classList.add('hidden');
        sheet.style.visibility = 'hidden';
    }, 300);
}

/** Zamykanie panelu: przeciągnięcie nagłówka w dół (pointer). */
function bindPlannerSheetDragClose(sheet, closeFn) {
    const zone = sheet.querySelector('[data-planner-sheet-drag-zone]');
    if (!zone || !sheet) return;

    let startY = 0;
    let pulling = false;
    let ptrId = null;

    const resetVisual = () => {
        sheet.style.transition = 'transform 300ms cubic-bezier(0.32, 0.72, 0, 1)';
        sheet.style.transform = 'translateY(0)';
    };

    zone.addEventListener('pointerdown', (e) => {
        if (e.pointerType === 'mouse' && e.button !== 0) return;
        pulling = true;
        ptrId = e.pointerId;
        startY = e.clientY;
        sheet.style.transition = 'none';
        zone.setPointerCapture(e.pointerId);
    });

    zone.addEventListener('pointermove', (e) => {
        if (!pulling || e.pointerId !== ptrId) return;
        const dy = Math.max(0, e.clientY - startY);
        sheet.style.transform = `translateY(${dy}px)`;
    });

    zone.addEventListener('pointerup', (e) => {
        if (!pulling || e.pointerId !== ptrId) return;
        const dy = e.clientY - startY;
        pulling = false;
        ptrId = null;
        try {
            zone.releasePointerCapture(e.pointerId);
        } catch {
            /* ignore */
        }
        if (dy > 56) {
            closeFn();
            return;
        }
        resetVisual();
    });

    zone.addEventListener('pointercancel', () => {
        pulling = false;
        ptrId = null;
        resetVisual();
    });
}

function renderDayContent(state) {
    const sel = state.selected;
    const dayPlan = getDayPlan(state.plans, sel);
    const totals = sumDayNutrition(dayPlan);

    const setText = (id, value) => {
        const el = document.getElementById(id);
        if (el) el.textContent = value;
    };
    const setGrams = (id, value) => {
        const el = document.getElementById(id);
        if (!el) return;
        el.textContent = value === null ? '—' : `${value}g`;
    };

    const hasMeals = totals.mealCount > 0;
    setText('planner-nutrition-kcal', hasMeals ? String(totals.kcal) : '—');
    setGrams('planner-nutrition-p', hasMeals ? totals.protein : null);
    setGrams('planner-nutrition-f', hasMeals ? totals.fat : null);
    setGrams('planner-nutrition-c', hasMeals ? totals.carbs : null);

    const ingBtn = document.getElementById('planner-open-ingredients');
    if (ingBtn) {
        const noMeals = totals.mealCount === 0;
        ingBtn.disabled = noMeals;
        ingBtn.classList.toggle('opacity-50', noMeals);
        ingBtn.classList.toggle('cursor-not-allowed', noMeals);
        if (!noMeals) {
            const shortCount = countDayShortfalls(dayPlan, loadPantry());
            if (shortCount > 0) {
                ingBtn.innerHTML = `<i class="fas fa-shopping-basket text-xs" aria-hidden="true"></i>
                    Składniki na ten dzień
                    <span class="ml-auto bg-red-500 text-white text-[10px] font-bold rounded-full w-5 h-5 inline-flex items-center justify-center">${shortCount}</span>`;
            } else {
                ingBtn.innerHTML = `<i class="fas fa-check-circle text-emerald-500 text-xs" aria-hidden="true"></i>
                    Składniki na ten dzień
                    <span class="ml-auto text-[10px] font-semibold text-emerald-600">OK</span>`;
            }
        } else {
            ingBtn.innerHTML = `<i class="fas fa-shopping-basket text-gray-500 text-xs" aria-hidden="true"></i> Składniki na ten dzień`;
        }
    }

    const slotsRoot = document.getElementById('planner-meal-slots');
    if (!slotsRoot) return;

    const skipped = dayPlan._skipped || {};

    slotsRoot.innerHTML = MEAL_SLOTS.map((slot) => {
        const isSkipped = skipped[slot.id] === true;
        const entries = isSkipped ? [] : (Array.isArray(dayPlan[slot.id]) ? dayPlan[slot.id] : []);

        let slotKcal = 0;
        entries.forEach((entry) => {
            if (entry?.recipeId && RECIPES[entry.recipeId]) slotKcal += computeEntryNutrition(entry).kcal;
        });

        const entryCards = entries.map((entry) => {
            const recipe = entry && entry.recipeId ? RECIPES[entry.recipeId] : null;
            if (!recipe) return '';
            const servings = Math.max(1, Number(entry.servings) || 1);
            const entryN = computeEntryNutrition(entry);
            const eid = escapeHtml(entry.id);
            const hasCustom = (entry.excludedIngredients?.length > 0) ||
                (entry.amountOverrides && Object.keys(entry.amountOverrides).length > 0) ||
                (entry.addedIngredients?.length > 0) ||
                (entry.substitutions && Object.keys(entry.substitutions).length > 0);
        const customDot = hasCustom ? '<span class="w-1.5 h-1.5 rounded-full bg-amber-400 inline-block shrink-0 ml-1"></span>' : '';
            const servLabel = servings > 1 ? `<span class="mx-1.5 text-[#6d6c67]">·</span>×${servings}` : '';
            return `
            <div class="rounded-lg bg-[#2d2e2b] p-2" style="box-shadow:inset 0 1px 3px rgba(0,0,0,0.3);" data-slot-id="${slot.id}" data-entry-id="${eid}">
                <div class="flex items-start justify-between gap-2">
                    <div class="flex items-center gap-2 min-w-0 cursor-pointer planner-open-recipe" data-recipe-id="${escapeHtml(recipe.id)}">
                        <div class="w-8 h-8 rounded-lg bg-[#3a3a37] overflow-hidden shrink-0">
                            ${recipe.image
                                ? `<img src="${escapeHtml(recipe.image)}" alt="" class="w-full h-full object-cover">`
                                : `<span class="w-full h-full flex items-center justify-center text-white text-[8px] font-medium">${escapeHtml(recipe.thumbLabel)}</span>`}
                        </div>
                        <div class="min-w-0">
                            <div class="flex items-center"><p class="text-[13px] font-bold text-[#ddd6ca] truncate underline decoration-1 underline-offset-2">${escapeHtml(recipe.title)}</p>${customDot}</div>
                            <p class="text-[11px] text-[#9b978f] mt-0.5 tabular-nums">
                                <i class="fas fa-clock text-[#7d7a74] mr-0.5" aria-hidden="true"></i>${recipe.minutes} min
                                <span class="mx-1.5 text-[#6d6c67]">·</span>
                                <i class="fas fa-fire text-[#7d7a74] mr-0.5" aria-hidden="true"></i>${entryN.kcal} kcal${servLabel}
                            </p>
                        </div>
                    </div>
                    <div class="flex items-center gap-1 shrink-0">
                        <button type="button" class="planner-edit-meal w-6 h-6 rounded-full border border-[#444442] text-[#9b978f] hover:text-[#ddd6ca] hover:border-[#6d6c67] hover:bg-[#3a3a37] flex items-center justify-center transition-colors" data-slot-id="${slot.id}" data-entry-id="${eid}" aria-label="Edytuj ten przepis">
                            <i class="fas fa-pencil text-[9px]" aria-hidden="true"></i>
                        </button>
                        <button type="button" class="planner-clear-meal w-6 h-6 rounded-full border border-[#444442] text-[#9b978f] hover:text-red-400 hover:border-red-300/60 hover:bg-[#3a2326] transition-colors flex items-center justify-center" data-slot-id="${slot.id}" data-entry-id="${eid}" aria-label="Usuń ten przepis">
                            <i class="fas fa-times text-[9px]" aria-hidden="true"></i>
                        </button>
                    </div>
                </div>
            </div>`;
        }).join('');

        const addBtn = `<button type="button" class="planner-add-meal w-7 h-7 rounded-full border border-[#444442] text-[#9b978f] flex items-center justify-center shrink-0" data-slot-id="${slot.id}" aria-label="Dodaj przepis"><i class="fas fa-plus text-[10px]"></i></button>`;

        const kcalPill = slotKcal > 0
            ? `<span class="text-[10px] font-semibold tabular-nums shrink-0 px-2 py-0.5 rounded-full" style="background:#2d2e2b; color:#d7d2c8;">${slotKcal} kcal</span>`
            : '';

        const filledCard = `
        <div class="rounded-xl bg-[#393937] overflow-hidden" style="background:#393937 !important; box-shadow:0 2px 8px rgba(0,0,0,0.25);" data-slot-id="${slot.id}">
            <div class="flex items-center gap-2 px-3 py-2.5 bg-[#393937]" style="background:#393937 !important;">
                <i class="fas ${slot.icon} w-7 text-center text-[13px] text-[#9b978f] shrink-0" aria-hidden="true"></i>
                <span class="text-[13px] font-semibold text-[#ddd6ca] truncate min-w-0">${slot.label}</span>
                <span class="ml-auto"></span>
                ${kcalPill}
                ${addBtn}
            </div>
            ${entries.length > 0 ? `<div class="px-2.5 pb-2.5 space-y-2 border-t border-[#444442]" style="padding-top:0.625rem;">${entryCards}</div>` : ''}
        </div>`;

        if (entries.length > 0) return filledCard;

        return `
        <div class="rounded-xl bg-[#393937] overflow-hidden" style="background:#393937 !important; box-shadow:0 2px 8px rgba(0,0,0,0.25);" data-slot-id="${slot.id}">
            <div class="flex items-center gap-2 px-3 py-2.5">
                <i class="fas ${slot.icon} w-7 text-center text-[13px] text-[#9b978f] shrink-0" aria-hidden="true"></i>
                <span class="text-[13px] font-semibold text-[#ddd6ca] truncate min-w-0">${slot.label}</span>
                <span class="ml-auto"></span>
                ${addBtn}
            </div>
            <div class="px-3 pb-2.5 -mt-0.5">
                <p class="text-[11px] text-[#7d7a74] italic pl-9">Zaplanuj posiłek</p>
            </div>
        </div>`;
    }).join('');
}

function escapeHtml(s) {
    return String(s)
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;');
}

function getRecentRecipeIds(plans, limit = 5) {
    const seen = new Map();
    const keys = Object.keys(plans).sort().reverse();
    for (const key of keys) {
        const day = plans[key];
        if (!day) continue;
        for (const slotId of Object.keys(day)) {
            if (slotId === '_skipped') continue;
            const entries = day[slotId];
            if (!Array.isArray(entries)) continue;
            for (const e of entries) {
                if (e?.recipeId && RECIPES[e.recipeId] && !seen.has(e.recipeId)) {
                    seen.set(e.recipeId, true);
                    if (seen.size >= limit) return [...seen.keys()];
                }
            }
        }
    }
    return [...seen.keys()];
}

function recipeCardHtml(r) {
    return `
        <button type="button" class="planner-pick-recipe w-full flex gap-2.5 p-2.5 rounded-xl border border-[#444442] bg-[#2d2e2b] hover:border-[#6d6c67] hover:bg-[#3a3a37] text-left transition-all" data-recipe-id="${r.id}">
            <div class="w-11 h-11 rounded-lg bg-[#3a3a37] overflow-hidden shrink-0">
                ${r.image
                    ? `<img src="${escapeHtml(r.image)}" alt="" class="w-full h-full object-cover">`
                    : `<span class="w-full h-full flex items-center justify-center text-white text-[9px] font-medium">${escapeHtml(r.thumbLabel)}</span>`}
            </div>
            <div class="min-w-0 flex-1 py-0.5">
                <p class="text-[13px] font-bold text-[#ddd6ca] line-clamp-2">${escapeHtml(r.title)}</p>
                <p class="text-[11px] text-[#9b978f] mt-1 tabular-nums">
                    <i class="fas fa-fire text-[#7d7a74] mr-0.5" aria-hidden="true"></i>${r.nutritionPerServing.kcal} kcal
                    <span class="mx-1 text-[#6d6c67]">·</span>
                    <i class="fas fa-clock text-[#7d7a74] mr-0.5" aria-hidden="true"></i>${r.minutes} min
                </p>
            </div>
        </button>`;
}

let _pickerSlotRecipes = [];
let _pickerPlans = {};

function renderPickerList(slotId, plans, query = '') {
    const slot = MEAL_SLOTS.find((s) => s.id === slotId);
    const list = document.getElementById('planner-picker-list');
    const title = document.getElementById('planner-picker-title');
    const sub = document.getElementById('planner-picker-sub');
    if (!list || !title || !sub) return;

    title.textContent = 'Wybierz przepis';
    sub.textContent = slot ? `Dla: ${slot.label}` : '';

    const allRecipes = recipesForSlot(slotId);
    _pickerSlotRecipes = allRecipes;
    _pickerPlans = plans;

    const q = query.trim().toLowerCase();
    const filtered = q
        ? allRecipes.filter((r) => r.title.toLowerCase().includes(q) || (r.tags || []).some((t) => t.toLowerCase().includes(q)))
        : allRecipes;

    if (filtered.length === 0 && q) {
        list.innerHTML = '<p class="text-sm text-[#9b978f] text-center py-6">Brak wyników.</p>';
        return;
    }
    if (filtered.length === 0) {
        list.innerHTML = '<p class="text-sm text-[#9b978f] text-center py-6">Brak dopasowanych przepisów.</p>';
        return;
    }

    let html = '';

    if (!q) {
        const recentIds = getRecentRecipeIds(plans);
        const recentInSlot = recentIds.map((id) => RECIPES[id]).filter((r) => r && r.allowedSlots.includes(slotId));
        if (recentInSlot.length > 0) {
            html += `<p class="text-[10px] font-bold text-gray-400 uppercase tracking-wider px-0.5 pt-1 pb-1"><i class="fas fa-history text-[9px] mr-1"></i>Ostatnio używane</p>`;
            html += recentInSlot.map(recipeCardHtml).join('');
            html += `<div class="border-t border-[#444442] my-2"></div>`;
            html += `<p class="text-[10px] font-bold text-gray-400 uppercase tracking-wider px-0.5 pt-1 pb-1">Wszystkie</p>`;
        }
    }

    html += filtered.map(recipeCardHtml).join('');
    list.innerHTML = html;
}

function plIngredientWord(n) {
    if (n === 1) return 'składnik';
    const m10 = n % 10;
    const m100 = n % 100;
    if (m10 >= 2 && m10 <= 4 && (m100 < 12 || m100 > 14)) return 'składniki';
    return 'składników';
}

function updateIngButtons(state) {
    const btn1 = document.getElementById('planner-ing-add-all');
    const btn2 = document.getElementById('planner-ing-add-btn');

    const todayCount = (state._todayShortfalls || []).length;
    const allCount = (state._allForecastShortfalls || []).length;

    if (btn1) {
        if (todayCount > 0) {
            btn1.classList.remove('hidden');
            btn1.disabled = false;
            btn1.innerHTML = `<i class="fas fa-cart-plus text-xs" aria-hidden="true"></i> Dodaj braki na dziś do listy`;
        } else {
            btn1.classList.add('hidden');
        }
    }
    if (btn2) {
        if (allCount > todayCount) {
            btn2.classList.remove('hidden');
            btn2.innerHTML = `<i class="fas fa-calendar-week text-gray-500 text-[11px]" aria-hidden="true"></i> Dodaj braki na cały tydzień`;
        } else {
            btn2.classList.add('hidden');
        }
    }
}

function renderIngredientsSheet(state) {
    const body = document.getElementById('planner-ing-body');
    const titleEl = document.getElementById('planner-ing-title');
    const subEl = document.getElementById('planner-ing-sub');
    if (!body) return;

    const pantry = loadPantry();
    const forecast = computeFullForecast(state.plans, pantry, state.selected);

    const today = forecast.length > 0 && forecast[0].dayIndex === 0 ? forecast[0] : null;
    const upcoming = forecast.filter((d) => d.dayIndex > 0 && d.hasShortfall);

    state._todayShortfalls = today ? today.items.filter((it) => !it.enough) : [];
    state._allForecastShortfalls = [];
    for (const d of forecast) {
        for (const it of d.items) {
            if (!it.enough) state._allForecastShortfalls.push(it);
        }
    }

    if (titleEl) {
        const wd = WEEKDAYS_LONG[state.selected.getDay()];
        titleEl.textContent = `${wd}, ${state.selected.getDate()} ${CALENDAR_MONTHS_SHORT[state.selected.getMonth()]} — składniki`;
    }
    if (subEl) subEl.textContent = 'Porównanie potrzeb z zapasami w spiżarni.';

    if (!today || today.items.length === 0) {
        body.innerHTML = '<p class="text-sm text-[#9b978f] text-center py-8">Najpierw zaplanuj posiłki.</p>';
        updateIngButtons(state);
        return;
    }

    const shortItems = today.items.filter((it) => !it.enough);
    const okItems = today.items.filter((it) => it.enough);
    let html = '';

    if (shortItems.length === 0) {
        html += `<div class="rounded-xl bg-[#2d2e2b] border border-emerald-400/40 p-3 mb-4 flex items-center gap-2.5">
            <div class="w-8 h-8 rounded-full bg-[#24352a] flex items-center justify-center shrink-0">
                <i class="fas fa-check text-emerald-600 text-sm"></i>
            </div>
            <div>
                <p class="text-[13px] font-semibold text-emerald-300">Wszystko masz w spiżarni</p>
                <p class="text-[11px] text-emerald-600/80">${today.items.length} ${plIngredientWord(today.items.length)} — zapasy wystarczą</p>
            </div>
        </div>`;
    } else {
        html += `<div class="rounded-xl bg-[#2d2e2b] border border-red-300/40 p-3 mb-4 flex items-center gap-2.5">
            <div class="w-8 h-8 rounded-full bg-[#3a2326] flex items-center justify-center shrink-0">
                <i class="fas fa-exclamation text-red-500 text-sm"></i>
            </div>
            <div>
                <p class="text-[13px] font-semibold text-red-300">${shortItems.length} ${plIngredientWord(shortItems.length)} do kupienia</p>
                <p class="text-[11px] text-red-600/80">Brakuje składników na zaplanowane posiłki</p>
            </div>
        </div>`;
    }

    if (shortItems.length > 0) {
        html += `<div class="mb-5">
            <p class="text-[10px] font-bold text-red-400 uppercase tracking-wider mb-2 px-0.5">
                <i class="fas fa-cart-shopping text-[9px] mr-1"></i>Do kupienia
            </p>
            <ul class="border border-red-300/30 rounded-xl overflow-hidden bg-[#2d2e2b] divide-y divide-[#3a2326]">
                ${shortItems.map((ing) => `
                <li class="flex items-start gap-3 py-3 px-3">
                    <div class="w-2 h-2 rounded-full bg-red-400 mt-1.5 shrink-0"></div>
                    <div class="flex-1 min-w-0">
                        <p class="text-[13px] font-semibold text-[#ddd6ca]">${escapeHtml(ing.name)}</p>
                        <p class="text-[11px] text-[#9b978f] mt-0.5">
                            potrzeba <span class="font-medium text-[#d7d2c8]">${formatAmount(ing.amount)} ${escapeHtml(ing.pantryUnit)}</span>
                            <span class="mx-1 text-[#6d6c67]">&middot;</span>
                            w spiżarni <span class="font-medium ${ing.pantryQty > 0 ? 'text-amber-600' : 'text-gray-400'}">${ing.pantryQty > 0 ? formatAmount(ing.pantryQty) + ' ' + escapeHtml(ing.pantryUnit) : 'brak'}</span>
                        </p>
                    </div>
                    <div class="text-right shrink-0 pt-0.5">
                        <p class="text-[13px] font-bold text-red-600 tabular-nums leading-tight">&minus;${formatAmount(ing.shortfall)}</p>
                        <p class="text-[9px] text-red-400 font-medium">${escapeHtml(ing.pantryUnit)}</p>
                    </div>
                </li>`).join('')}
            </ul>
        </div>`;
    }

    if (okItems.length > 0) {
        html += `<div class="mb-5">
            <p class="text-[10px] font-bold text-emerald-500 uppercase tracking-wider mb-2 px-0.5">
                <i class="fas fa-check text-[9px] mr-1"></i>W spiżarni
            </p>
            <ul class="border border-[#444442] rounded-xl overflow-hidden bg-[#2d2e2b] divide-y divide-[#353632]">
                ${okItems.map((ing) => `
                <li class="flex items-start gap-3 py-2.5 px-3">
                    <div class="w-2 h-2 rounded-full bg-emerald-400 mt-1.5 shrink-0"></div>
                    <div class="flex-1 min-w-0">
                        <p class="text-[13px] font-medium text-[#d7d2c8]">${escapeHtml(ing.name)}</p>
                        <p class="text-[11px] text-[#9b978f] mt-0.5">
                            potrzeba <span class="font-medium text-[#d7d2c8]">${formatAmount(ing.amount)} ${escapeHtml(ing.pantryUnit)}</span>
                            <span class="mx-1 text-[#6d6c67]">&middot;</span>
                            masz <span class="font-medium text-emerald-600">${formatAmount(ing.pantryQty)} ${escapeHtml(ing.pantryUnit)}</span>
                        </p>
                    </div>
                </li>`).join('')}
            </ul>
        </div>`;
    }

    if (upcoming.length > 0) {
        html += `<div class="mb-2">
            <p class="text-[10px] font-bold text-amber-500 uppercase tracking-wider mb-2 px-0.5">
                <i class="fas fa-calendar-alt text-[9px] mr-1"></i>Nadchodzące braki
            </p>
            <div class="space-y-2">
                ${upcoming.map((day) => {
                    const wd = WEEKDAYS_LONG[day.date.getDay()];
                    const label = `${wd}, ${day.date.getDate()} ${CALENDAR_MONTHS_SHORT[day.date.getMonth()]}`;
                    const shorts = day.items.filter((it) => !it.enough);
                    return `<div class="rounded-xl border border-amber-200/80 bg-[#2d2e2b] p-3">
                        <p class="text-[12px] font-semibold text-amber-900">
                            <i class="fas fa-calendar-day text-[10px] mr-1.5 text-amber-500"></i>${escapeHtml(label)}
                        </p>
                        <ul class="mt-2 space-y-1.5">
                            ${shorts.map((it) => `
                            <li class="flex items-center justify-between text-[11px]">
                                <span class="font-medium text-amber-900">${escapeHtml(it.name)}</span>
                                <span class="font-semibold text-red-600 tabular-nums">&minus;${formatAmount(it.shortfall)} ${escapeHtml(it.pantryUnit)}</span>
                            </li>`).join('')}
                        </ul>
                    </div>`;
                }).join('')}
            </div>
        </div>`;
    }

    body.innerHTML = html;
    updateIngButtons(state);
}

function formatAmount(n) {
    return Number.isInteger(n) ? String(n) : String(n);
}

function seedDemoIfEmpty(plans) {
    const todayKey = dateKey(new Date());
    if (Object.keys(plans).length > 0) return plans;
    return {
        ...plans,
        [todayKey]: {
            sniadanie: [{ id: newPlanEntryId(), recipeId: 'jajecznica', servings: 1 }],
            obiad: [{ id: newPlanEntryId(), recipeId: 'makaron_ricotta', servings: 1 }],
            kolacja: [{ id: newPlanEntryId(), recipeId: 'kanapka_losos', servings: 1 }],
        },
    };
}

export function setupMealPlanner() {
    let plans = loadPlans();
    plans = seedDemoIfEmpty(plans);
    savePlans(plans);

    const state = {
        mode: 'week',
        weekStart: startOfWeekMonday(new Date()),
        monthAnchor: startOfDay(new Date()),
        selected: startOfDay(new Date()),
        plans,
        pickerSlot: null,
    };

    const weekGrid = document.getElementById('calendar-week-grid');
    const monthGrid = document.getElementById('calendar-month-grid');

    const pickerBackdrop = document.getElementById('planner-picker-backdrop');
    const pickerSheet = document.getElementById('planner-picker-sheet');
    const ingBackdrop = document.getElementById('planner-ing-backdrop');
    const ingSheet = document.getElementById('planner-ing-sheet');

    const rerender = () => {
        syncModeToggle(state.mode);
        updatePeriodLabel(state.mode, state.weekStart, state.monthAnchor, state.selected);
        syncTodayButton(state.mode, state.weekStart, state.monthAnchor, state.selected);
        renderCollapsibleCalendar({
            weekGridEl: weekGrid,
            monthGridEl: monthGrid,
            weekAnchorDate: state.weekStart,
            monthAnchorDate: state.monthAnchor,
            selectedDate: state.selected,
            resolveDayState: (day, meta) => ({
                dimmed: meta.mode === 'month' && !meta.inCurrentMonth,
                showIndicator: meta.mode === 'month'
                    ? meta.inCurrentMonth && dayHasAnyMeal(state.plans, day)
                    : dayHasAnyMeal(state.plans, day),
            }),
        });
        renderDayContent(state);
    };

    const persist = () => {
        savePlans(state.plans);
        rerender();
    };

    /* ── calendar scroll shadow ─────────────────── */
    const plannerScroll = document.getElementById('planner-scroll');
    const calBar = document.getElementById('planner-cal-bar');
    if (plannerScroll && calBar) {
        const shadow = document.createElement('div');
        shadow.style.cssText = 'position:absolute;left:0;right:0;bottom:-8px;height:8px;background:linear-gradient(to bottom,rgba(0,0,0,0.25),transparent);opacity:0;transition:opacity 0.2s;pointer-events:none;';
        calBar.appendChild(shadow);
        plannerScroll.addEventListener('scroll', () => {
            shadow.style.opacity = plannerScroll.scrollTop > 2 ? '1' : '0';
        });
    }

    bindCalendarDayClicks(weekGrid, (date) => {
        state.selected = date;
        rerender();
    });
    bindCalendarDayClicks(monthGrid, (date) => {
        state.selected = date;
        rerender();
    });

    document.getElementById('cal-prev')?.addEventListener('click', () => {
        if (state.mode === 'week') {
            state.weekStart = addWeeks(state.weekStart, -1);
            if (!weekContains(state.weekStart, state.selected)) {
                state.selected = new Date(state.weekStart);
            }
        } else {
            state.monthAnchor = addMonths(state.monthAnchor, -1);
            if (!sameMonth(state.monthAnchor, state.selected)) {
                state.selected = startOfMonth(state.monthAnchor);
            }
        }
        rerender();
    });

    document.getElementById('cal-next')?.addEventListener('click', () => {
        if (state.mode === 'week') {
            state.weekStart = addWeeks(state.weekStart, 1);
            if (!weekContains(state.weekStart, state.selected)) {
                state.selected = new Date(state.weekStart);
            }
        } else {
            state.monthAnchor = addMonths(state.monthAnchor, 1);
            if (!sameMonth(state.monthAnchor, state.selected)) {
                state.selected = startOfMonth(state.monthAnchor);
            }
        }
        rerender();
    });

    document.getElementById('cal-go-today')?.addEventListener('click', () => {
        const today = startOfDay(new Date());
        state.selected = today;
        state.weekStart = startOfWeekMonday(today);
        state.monthAnchor = startOfMonth(today);
        rerender();
    });

    document.getElementById('planner-meal-slots')?.addEventListener('click', (e) => {
        const skipBtn = e.target.closest('.planner-skip-meal');
        if (skipBtn) {
            const slotId = skipBtn.getAttribute('data-slot-id');
            if (!slotId) return;
            const key = dateKey(state.selected);
            if (!state.plans[key]) state.plans[key] = {};
            if (!state.plans[key]._skipped) state.plans[key]._skipped = {};
            state.plans[key]._skipped[slotId] = true;
            persist();
            return;
        }
        const unskipBtn = e.target.closest('.planner-unskip');
        if (unskipBtn) {
            const slotId = unskipBtn.getAttribute('data-slot-id');
            if (!slotId) return;
            const key = dateKey(state.selected);
            if (state.plans[key]?._skipped) {
                delete state.plans[key]._skipped[slotId];
                if (Object.keys(state.plans[key]._skipped).length === 0) delete state.plans[key]._skipped;
                if (Object.keys(state.plans[key]).length === 0) delete state.plans[key];
            }
            persist();
            return;
        }
        const openRecipe = e.target.closest('.planner-open-recipe');
        if (openRecipe) {
            const recipeId = openRecipe.getAttribute('data-recipe-id');
            if (recipeId && window.openRecipeDetail) {
                window.openRecipeDetail(recipeId);
            }
            return;
        }
        const addBtn = e.target.closest('.planner-add-meal');
        if (addBtn) {
            const slotId = addBtn.getAttribute('data-slot-id');
            state.pickerSlot = slotId;
            const searchInput = document.getElementById('planner-picker-search');
            if (searchInput) searchInput.value = '';
            renderPickerList(slotId, state.plans);
            openSheet(pickerBackdrop, pickerSheet);
            return;
        }
        const editBtn = e.target.closest('.planner-edit-meal');
        if (editBtn) {
            const slotId = editBtn.getAttribute('data-slot-id');
            const entryId = editBtn.getAttribute('data-entry-id');
            const key = dateKey(state.selected);
            const arr = state.plans[key]?.[slotId];
            if (!Array.isArray(arr)) return;
            const entry = arr.find((x) => x && x.id === entryId);
            if (!entry) return;
            window.openMealPlanEditor?.({
                mode: 'edit',
                recipeId: entry.recipeId,
                date: state.selected,
                slotId,
                entry,
            });
            return;
        }
        const clearBtn = e.target.closest('.planner-clear-meal');
        if (clearBtn) {
            const slotId = clearBtn.getAttribute('data-slot-id');
            const entryId = clearBtn.getAttribute('data-entry-id');
            const key = dateKey(state.selected);
            const arr = state.plans[key]?.[slotId];
            if (!Array.isArray(arr) || !entryId) return;
            const next = arr.filter((x) => x && x.id !== entryId);
            if (!state.plans[key]) state.plans[key] = {};
            if (next.length === 0) delete state.plans[key][slotId];
            else state.plans[key][slotId] = next;
            if (Object.keys(state.plans[key]).length === 0) delete state.plans[key];
            persist();
            return;
        }
    });

    const closePicker = () => {
        state.pickerSlot = null;
        closeSheet(pickerBackdrop, pickerSheet);
    };

    document.getElementById('planner-picker-search')?.addEventListener('input', (e) => {
        if (state.pickerSlot) {
            renderPickerList(state.pickerSlot, state.plans, e.target.value);
        }
    });

    bindPlannerSheetDragClose(pickerSheet, closePicker);
    bindPlannerSheetDragClose(ingSheet, () => closeSheet(ingBackdrop, ingSheet));

    pickerBackdrop?.addEventListener('click', closePicker);

    document.getElementById('planner-picker-list')?.addEventListener('click', (e) => {
        const pick = e.target.closest('.planner-pick-recipe');
        if (!pick || !state.pickerSlot) return;
        const recipeId = pick.getAttribute('data-recipe-id');
        if (!recipeId || !RECIPES[recipeId]) return;
        const slotId = state.pickerSlot;
        closePicker();
        setTimeout(() => {
            window.openMealPlanEditor?.({
                mode: 'add',
                recipeId,
                date: state.selected,
                slotId,
            });
        }, 320);
    });

    document.getElementById('planner-open-ingredients')?.addEventListener('click', () => {
        if (sumDayNutrition(getDayPlan(state.plans, state.selected)).mealCount === 0) return;
        renderIngredientsSheet(state);
        openSheet(ingBackdrop, ingSheet);
    });

    ingBackdrop?.addEventListener('click', () => {
        closeSheet(ingBackdrop, ingSheet);
    });

    ingSheet?.addEventListener('click', (e) => {
        const row = e.target.closest('.planner-ing-row');
        if (!row || !ingSheet.contains(row)) return;
        row.classList.toggle('ingredient-active');
    });

    document.getElementById('planner-ing-add-all')?.addEventListener('click', () => {
        const items = state._todayShortfalls || [];
        if (items.length === 0) return;
        const lines = items.map((it) => ({
            ingredientId: it.ingredientId,
            amount: it.shortfall,
            unit: it.pantryUnit,
            category: it.category,
            sourceNote: 'Braki z planu dnia',
        }));
        addOrMergeShoppingLines(lines);
        showPlannerToast(`Dodano ${lines.length} braków na listę zakupów.`);
        window.refreshShopping?.();
        closeSheet(ingBackdrop, ingSheet);
    });

    document.getElementById('planner-ing-add-btn')?.addEventListener('click', () => {
        const items = state._allForecastShortfalls || [];
        if (items.length === 0) return;
        const map = new Map();
        for (const it of items) {
            const key = it.ingredientId;
            if (map.has(key)) {
                const cur = map.get(key);
                cur.amount = Math.round((cur.amount + it.shortfall) * 10) / 10;
            } else {
                map.set(key, {
                    ingredientId: it.ingredientId,
                    amount: it.shortfall,
                    unit: it.pantryUnit,
                    category: it.category,
                    sourceNote: 'Braki z planu tygodnia',
                });
            }
        }
        const lines = [...map.values()];
        addOrMergeShoppingLines(lines);
        showPlannerToast(`Dodano ${lines.length} braków na listę zakupów.`);
        window.refreshShopping?.();
        closeSheet(ingBackdrop, ingSheet);
    });

    rerender();

    window.refreshPlanner = () => {
        state.plans = loadPlans();
        rerender();
    };

    bindCalendarSwipeGesture(state, rerender);

    requestAnimationFrame(() => {
        const ww = document.getElementById('calendar-week-wrap');
        const mw = document.getElementById('calendar-month-wrap');
        const t = 'max-height 300ms ease, opacity 200ms ease';
        if (ww) ww.style.transition = t;
        if (mw) mw.style.transition = t;
    });
}