(() => {
    'use strict';

    const PTA = window.PTA;
    if (!PTA) throw new Error('PTA core doit être chargé avant structure-overview.js');

    const { openStructurePdfButton } = PTA.elements;
    const { escapeHtml, readJsonResponse, apiErrorMessage, parseIsoWeek, formatDate } = PTA.utils;
    const typeLabel = (type) => type === 'EXTRASCOLAIRE' ? 'Extrascolaire' : 'Périscolaire';

    function entryBadge(entry) {
        return `
            <div class="overview-entry motif-${escapeHtml(String(entry.motif_code || 'autre').toLowerCase())}">
                <strong>${escapeHtml(entry.heure_debut)}–${escapeHtml(entry.heure_fin)}</strong>
                <span>${escapeHtml(entry.motif_libelle)}</span>
                ${entry.statut === 'BROUILLON' ? '<em>Brouillon</em>' : ''}
            </div>
        `;
    }

    function coveragePanel(coverage) {
        if (!coverage?.configured) {
            return `
                <div class="coverage-inline-notice coverage-inline-info">
                    <strong>Couverture non configurée</strong>
                    <span>Définissez les horaires de présence minimale dans Administration pour détecter automatiquement les créneaux vides.</span>
                </div>`;
        }

        const gaps = Array.isArray(coverage.gaps) ? coverage.gaps : [];
        if (!gaps.length) {
            return `
                <div class="coverage-inline-notice coverage-inline-success">
                    <strong>Couverture complète</strong>
                    <span>Aucun manque d’agent détecté sur les plages de couverture configurées.</span>
                </div>`;
        }

        const items = gaps.slice(0, 8).map((gap) => `
            <li><strong>${escapeHtml(gap.jour_libelle)} ${escapeHtml(gap.heure_debut)}–${escapeHtml(gap.heure_fin)}</strong> : ${Number(gap.agents_manquants)} agent${Number(gap.agents_manquants) > 1 ? 's' : ''} manquant${Number(gap.agents_manquants) > 1 ? 's' : ''}</li>
        `).join('');
        const more = gaps.length > 8 ? `<li>… et ${gaps.length - 8} autre${gaps.length - 8 > 1 ? 's' : ''} plage${gaps.length - 8 > 1 ? 's' : ''}.</li>` : '';
        return `
            <div class="coverage-inline-notice coverage-inline-danger">
                <strong>⚠ ${gaps.length} plage${gaps.length > 1 ? 's' : ''} insuffisamment couverte${gaps.length > 1 ? 's' : ''}</strong>
                <ul>${items}${more}</ul>
            </div>`;
    }

    function render(data) {
        const container = document.querySelector('#structure-overview-content');
        const empty = document.querySelector('#structure-overview-empty');
        const days = parseIsoWeek(data.week.value);
        if (!container || !empty) return;

        empty.hidden = true;
        container.hidden = false;

        if (!data.agents.length) {
            container.innerHTML = `
                <div class="overview-title-row">
                    <div>
                        <h3>${escapeHtml(data.structure.nom)}</h3>
                        <p>${typeLabel(data.structure.type_affectation)} · semaine du ${formatDate(days[0]?.date)} au ${formatDate(days[days.length - 1]?.date)}</p>
                    </div>
                    <span class="overview-count">0 agent</span>
                </div>
                ${coveragePanel(data.coverage)}
                <div class="empty-state">Aucun agent n’est rattaché ou planifié sur ce lieu pour cette semaine.</div>`;
            return;
        }

        const headerDays = days.map((day) => `<th><strong>${day.label}</strong><span>${day.display}</span></th>`).join('');
        const rows = data.agents.map((agent) => {
            const cells = days.map((day) => {
                const entries = agent.entries.filter((entry) => entry.date_jour === day.date);
                return `<td>${entries.length ? entries.map((entry) => entryBadge(entry)).join('') : '<span class="cell-empty">—</span>'}</td>`;
            }).join('');

            return `
                <tr>
                    <th class="agent-cell">
                        <strong>${escapeHtml(agent.prenom)} ${escapeHtml(agent.nom)}</strong>
                        <span>${escapeHtml(agent.matricule)}</span>
                        <small>${agent.lieu_principal ? 'Lieu principal' : 'Affectation ponctuelle'}</small>
                    </th>
                    ${cells}
                    <td class="quota-cell">
                        <strong>${escapeHtml(agent.quota.restantes.libelle)}</strong>
                        <span>sur ${escapeHtml(agent.quota.quota_cible.libelle)}</span>
                        <small>${Number(agent.quota.quotite_travail).toLocaleString('fr-FR')} %</small>
                    </td>
                </tr>
            `;
        }).join('');

        container.innerHTML = `
            <div class="overview-title-row">
                <div>
                    <h3>${escapeHtml(data.structure.nom)}</h3>
                    <p>${typeLabel(data.structure.type_affectation)} · semaine du ${formatDate(days[0]?.date)} au ${formatDate(days[days.length - 1]?.date)}</p>
                </div>
                <span class="overview-count">${data.agents.length} agent${data.agents.length > 1 ? 's' : ''}</span>
            </div>
            ${coveragePanel(data.coverage)}
            <div class="table-scroll">
                <table class="planning-table">
                    <thead>
                        <tr>
                            <th>Agent</th>
                            ${headerDays}
                            <th>Quota restant</th>
                        </tr>
                    </thead>
                    <tbody>${rows}</tbody>
                </table>
            </div>
        `;
    }

    function updatePdfButton() {
        if (!openStructurePdfButton) return;
        const structureId = document.querySelector('#overview-structure')?.value;
        const week = document.querySelector('#overview-week')?.value;
        openStructurePdfButton.disabled = !(structureId && week);
    }

    function openPdf() {
        const structureId = document.querySelector('#overview-structure')?.value;
        const week = document.querySelector('#overview-week')?.value;
        if (!structureId || !week) return;

        const params = new URLSearchParams({ structure_id: structureId, week });
        window.open(`api/structure_planning_pdf.php?${params.toString()}`, '_blank', 'noopener');
    }

    async function load() {
        const structureId = document.querySelector('#overview-structure')?.value;
        const week = document.querySelector('#overview-week')?.value;
        const container = document.querySelector('#structure-overview-content');
        const empty = document.querySelector('#structure-overview-empty');
        updatePdfButton();
        if (!container || !empty) return;

        if (!structureId || !week) {
            empty.hidden = false;
            empty.textContent = 'Choisissez un lieu d’affectation et une semaine.';
            container.hidden = true;
            return;
        }

        empty.hidden = false;
        empty.textContent = 'Chargement du planning du lieu…';
        container.hidden = true;

        try {
            const params = new URLSearchParams({ structure_id: structureId, week });
            const response = await fetch(`api/structure_overview.php?${params.toString()}`);
            const data = await readJsonResponse(response);
            if (!response.ok) throw new Error(apiErrorMessage(data, 'Impossible de charger la vue du lieu.'));
            render(data);
        } catch (error) {
            empty.hidden = false;
            empty.textContent = error.message;
        }
    }

    function init() {
        document.querySelector('#load-structure-overview')?.addEventListener('click', load);
        document.querySelector('#overview-structure')?.addEventListener('change', load);
        document.querySelector('#overview-week')?.addEventListener('change', load);
        openStructurePdfButton?.addEventListener('click', openPdf);
        updatePdfButton();
    }

    PTA.modules.structureOverview = { init, load, render, updatePdfButton };
})();