import { RECIPES } from '../data/catalog.js';
import { MEAL_SLOTS } from '../planner/mealSlots.js';

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

const slotLabelMap = Object.fromEntries(MEAL_SLOTS.map((s) => [s.id, s.label]));

function slotLabelsFor(recipe) {
    return (recipe.allowedSlots || [])
        .map((id) => slotLabelMap[id])
        .filter(Boolean);
}

let filterState = {
    query: '',
    slots: [],
    tags: [],
    maxMinutes: 120,
};

function matchesFilters(recipe) {
    const { query, slots, tags, maxMinutes } = filterState;

    if (query) {
        const q = query.toLowerCase();
        const haystack = `${recipe.title} ${recipe.description || ''} ${(recipe.tags || []).join(' ')}`.toLowerCase();
        if (!haystack.includes(q)) return false;
    }

    if (slots.length > 0) {
        if (!recipe.allowedSlots.some((s) => slots.includes(s))) return false;
    }

    if (tags.length > 0) {
        const recipeTags = (recipe.tags || []).map((t) => t.toLowerCase());
        if (!tags.some((t) => recipeTags.includes(t.toLowerCase()))) return false;
    }

    if (recipe.minutes > maxMinutes) return false;

    return true;
}

function getFilteredRecipes() {
    return Object.values(RECIPES).filter(matchesFilters);
}

function renderRecipeCard(recipe) {
    const labels = slotLabelsFor(recipe);
    return `
        <div onclick="openRecipeDetail('${escapeHtml(recipe.id)}')" class="border border-gray-200 rounded-xl overflow-hidden shadow-sm flex flex-col bg-white cursor-pointer hover:shadow-md transition-shadow">
            <div class="h-32 bg-[#d4d4d4] relative overflow-hidden">
                ${recipe.image
                    ? `<img src="${escapeHtml(recipe.image)}" alt="${escapeHtml(recipe.title)}" class="w-full h-full object-cover">`
                    : `<span class="absolute inset-0 flex items-center justify-center text-white font-medium text-xs">${escapeHtml(recipe.thumbLabel)}</span>`}
            </div>
            <div class="p-3 flex flex-col flex-1">
                <h3 class="text-sm font-medium underline decoration-1 underline-offset-2 text-black mb-1 line-clamp-1">${escapeHtml(recipe.title)}</h3>
                <p class="text-gray-500 text-xs mb-3 line-clamp-2">${escapeHtml(recipe.description || '')}</p>
                <div class="mt-auto">
                    <div class="flex items-center justify-between text-[11px] text-gray-600 font-medium mb-2">
                        <div class="flex items-center gap-1"><i class="fas fa-clock text-gray-400"></i><span>${recipe.minutes} min</span></div>
                        <div class="flex items-center gap-1"><i class="fas fa-fire text-gray-400"></i><span>${recipe.nutritionPerServing.kcal} kcal</span></div>
                    </div>
                    <div class="flex flex-wrap gap-1">
                        ${labels.map((l) => `<span class="px-2 py-0.5 bg-gray-100 text-gray-600 text-[10px] rounded-md font-medium">${escapeHtml(l)}</span>`).join('')}
                    </div>
                </div>
            </div>
        </div>`;
}

function renderGrid() {
    const grid = document.getElementById('recipe-grid');
    if (!grid) return;

    const recipes = getFilteredRecipes();
    if (recipes.length === 0) {
        grid.innerHTML = `
            <div class="col-span-2 flex flex-col items-center justify-center py-16 text-center">
                <div class="w-16 h-16 rounded-full bg-gray-100 flex items-center justify-center mb-4">
                    <i class="fas fa-search text-2xl text-gray-300"></i>
                </div>
                <p class="text-sm font-semibold text-gray-700">Brak wyników</p>
                <p class="text-xs text-gray-500 mt-1 max-w-[220px] leading-relaxed">Zmień kryteria wyszukiwania lub filtry</p>
            </div>`;
        return;
    }

    grid.innerHTML = recipes.map(renderRecipeCard).join('');
}

export function getRecipeListHTML() {
    return `
    <div id="main-view" class="flex flex-col h-full absolute inset-0 bg-gray-50 z-10">
        <div class="p-4 border-b border-gray-200 mt-4 bg-white">
            <div class="flex items-center w-full border border-gray-300 rounded-lg bg-white focus-within:border-gray-400 transition-colors">
                <div class="pl-3 pr-2 text-gray-400"><i class="fas fa-search"></i></div>
                <input type="text" id="recipe-search-input" placeholder="Szukaj przepisów..." class="flex-1 py-2.5 bg-transparent outline-none text-gray-600 placeholder-gray-400 text-sm">
                <div class="w-px h-6 bg-gray-200"></div>
                <button onclick="openFilters()" class="px-4 text-gray-700 hover:text-black flex items-center justify-center transition-colors">
                    <i class="fas fa-sliders-h"></i>
                </button>
            </div>
        </div>

        <div class="flex-1 overflow-y-auto px-4 pt-4 pb-24 bg-gray-50">
            <div id="recipe-grid" class="grid grid-cols-2 gap-3"></div>
        </div>
    </div>
    `;
}

export function getFilterState() {
    return filterState;
}

export function applyFilters(newState) {
    Object.assign(filterState, newState);
    renderGrid();
}

export function getFilteredCount() {
    return getFilteredRecipes().length;
}

export function refreshRecipeList() {
    renderGrid();
}

export function setupRecipeList() {
    renderGrid();

    document.getElementById('recipe-search-input')?.addEventListener('input', (e) => {
        filterState.query = e.target.value.trim();
        renderGrid();
    });
}