/**
 * Application de comparaison des KPIs COP régionales
 */

// ============================================================
// Initialisation
// ============================================================
document.addEventListener("DOMContentLoaded", () => {
    renderTiles();
    renderTable();
});

// ============================================================
// Tuiles de synthèse
// ============================================================
function renderTiles() {
    const container = document.getElementById("tiles-container");
    container.innerHTML = "";

    for (const [catName, catInfo] of Object.entries(CATEGORIES)) {
        const catKpis = KPI_DATA.filter(k => k.categorie === catName);
        const comparableCount = catKpis.filter(k => k.comparable).length;
        const total = catKpis.length;
        const pct = total > 0 ? Math.round((comparableCount / total) * 100) : 0;

        const col = document.createElement("div");
        col.className = "fr-col-12 fr-col-sm-6 fr-col-md-4 fr-col-lg-3";

        col.innerHTML = `
            <div class="tile-category" onclick="filterByCategory('${catName}')" tabindex="0"
                 role="button" aria-label="Filtrer par ${catName}">
                <div class="tile-category__icon">${catInfo.icon}</div>
                <div class="tile-category__title">${catName}</div>
                <div class="tile-category__count">
                    ${total} KPI${total > 1 ? 's' : ''} — 
                    <strong>${comparableCount}</strong> comparable${comparableCount > 1 ? 's' : ''}
                </div>
                <div class="tile-category__bar">
                    <div class="tile-category__bar-fill bar-fill--green" style="width: ${pct}%"></div>
                </div>
            </div>
        `;

        container.appendChild(col);
    }
}

// ============================================================
// Tableau de comparaison
// ============================================================
function renderTable(filteredData = null) {
    const tbody = document.getElementById("kpi-tbody");
    tbody.innerHTML = "";

    const data = filteredData || KPI_DATA;
    let currentCategory = "";

    data.forEach(kpi => {
        // Ligne catégorie
        if (kpi.categorie !== currentCategory) {
            currentCategory = kpi.categorie;
            const catRow = document.createElement("tr");
            catRow.className = "category-row";
            catRow.dataset.category = currentCategory;

            const catInfo = CATEGORIES[currentCategory] || { icon: "📋" };
            catRow.innerHTML = `
                <td colspan="6" style="border-left: 4px solid ${catInfo.color || '#000091'}">
                    ${catInfo.icon} ${currentCategory}
                </td>
            `;
            tbody.appendChild(catRow);
        }

        // Ligne KPI
        const row = document.createElement("tr");
        row.dataset.category = kpi.categorie;
        row.dataset.comparable = kpi.comparable ? "true" : "false";

        const comparableTag = getComparableTag(kpi);

        row.innerHTML = `
            <td class="col-indicateur">
                <strong>${kpi.indicateur}</strong>
                <br><small style="color: #929292">${kpi.unite}</small>
            </td>
            <td class="col-region">${formatValueWithSource(kpi.grand_est, "grand_est", kpi.grand_est_page)}</td>
            <td class="col-region">${formatValueWithSource(kpi.occitanie, "occitanie", kpi.occitanie_page)}</td>
            <td class="col-region">${formatValueWithSource(kpi.aura, "aura", kpi.aura_page)}</td>
            <td class="col-region">${formatValueWithSource(kpi.normandie, "normandie", kpi.normandie_page)}</td>
            <td class="col-comparable">${comparableTag}</td>
        `;

        tbody.appendChild(row);
    });

    // Compteur
    updateCounter(data);
}

function formatValueWithSource(val, regionKey, page) {
    if (!val || val === "Non chiffré" || val === "Non chiffré spécifiquement" || val === "Non traité" || val.startsWith("Non traité") || val.startsWith("Non chiffré") || val.startsWith("Non détaillé")) {
        const na = `<span class="value-na">${val || '—'}</span>`;
        return na;
    }
    
    // Mettre en avant les chiffres
    let formatted = val.replace(/(\d[\d\s,.×÷%]*(?:\s*(?:ktCO2eq|MtCO2eq|TWh|GWh|MW|MWc|km|ha|%|millions?|milliards?|M€|Mm3))?)/g,
        '<strong>$1</strong>');

    // Ajouter le lien source avec page
    if (page && SOURCES[regionKey]) {
        const link = `${SOURCES[regionKey].url}#page=${page}`;
        formatted += ` <a href="${link}" target="_blank" rel="noopener" class="source-link" title="Voir page ${page} du PDF ${SOURCES[regionKey].name}">p.${page}</a>`;
    }

    return formatted;
}

function getComparableTag(kpi) {
    if (kpi.comparable) {
        return `
            <span class="tag-comparable tag-comparable--yes" title="${kpi.comparableNote}">
                ✓ Oui
            </span>
        `;
    }
    // Check if at least 2 regions have data
    const regions = [kpi.grand_est, kpi.occitanie, kpi.aura, kpi.normandie];
    const withData = regions.filter(v => v && !v.startsWith("Non") && !v.includes("N/D")).length;

    if (withData >= 2) {
        return `
            <span class="tag-comparable tag-comparable--partial" title="${kpi.comparableNote}">
                ~ Partiel
            </span>
        `;
    }

    return `
        <span class="tag-comparable tag-comparable--no" title="${kpi.comparableNote}">
            — Non
        </span>
    `;
}

// ============================================================
// Filtrage
// ============================================================
function filterTable() {
    const category = document.getElementById("filter-category").value;
    const search = document.getElementById("search-input").value.toLowerCase().trim();
    const onlyComparable = document.getElementById("toggle-comparable").checked;

    let filtered = KPI_DATA;

    if (category !== "all") {
        filtered = filtered.filter(k => k.categorie === category);
    }

    if (search) {
        filtered = filtered.filter(k =>
            k.indicateur.toLowerCase().includes(search) ||
            k.categorie.toLowerCase().includes(search) ||
            k.grand_est.toLowerCase().includes(search) ||
            k.occitanie.toLowerCase().includes(search) ||
            k.aura.toLowerCase().includes(search) ||
            k.normandie.toLowerCase().includes(search) ||
            k.unite.toLowerCase().includes(search)
        );
    }

    if (onlyComparable) {
        filtered = filtered.filter(k => k.comparable);
    }

    renderTable(filtered);
}

function filterByCategory(catName) {
    const select = document.getElementById("filter-category");
    if (select.value === catName) {
        select.value = "all";
    } else {
        select.value = catName;
    }
    filterTable();

    // Scroll to table
    document.getElementById("comparaison").scrollIntoView({ behavior: "smooth" });
}

// ============================================================
// Compteur de résultats
// ============================================================
function updateCounter(data) {
    const tableTitle = document.querySelector("#comparaison h2");
    const total = data.length;
    const comparable = data.filter(k => k.comparable).length;
    tableTitle.innerHTML = `Comparaison détaillée des KPIs <span style="font-size: 0.875rem; font-weight: 400; color: #666">(${total} KPI${total > 1 ? 's' : ''}, dont ${comparable} comparable${comparable > 1 ? 's' : ''})</span>`;
}