(() => {
    'use strict';

    const elements = {
        structureSelect: document.querySelector('#structure'),
        agentSelect: document.querySelector('#agent'),
        weekInput: document.querySelector('#week'),
        weeklyEntryBody: document.querySelector('#weekly-entry-body'),
        addButton: document.querySelector('#add-entry'),
        saveButton: document.querySelector('#save-draft'),
        validateButton: document.querySelector('#validate-planning'),
        modifyButton: document.querySelector('#modify-planning'),
        planningBoard: document.querySelector('#planning-board'),
        emptyState: document.querySelector('#empty-state'),
        weekLabel: document.querySelector('#week-label'),
        workTotal: document.querySelector('#work-total'),
        statusBadge: document.querySelector('#planning-status'),
        messageBox: document.querySelector('#message'),
        openAgentPdfButton: document.querySelector('#open-agent-pdf'),
        openStructurePdfButton: document.querySelector('#open-structure-pdf'),
        quotaPanel: document.querySelector('#editor-quota'),
        quotaRate: document.querySelector('#quota-rate'),
        quotaTarget: document.querySelector('#quota-target'),
        quotaPeriod: document.querySelector('#quota-period'),
        quotaUsed: document.querySelector('#quota-used'),
        quotaUsedDetail: document.querySelector('#quota-used-detail'),
        quotaRemaining: document.querySelector('#quota-remaining'),
    };

    const state = {
        entries: [],
        otherStructureEntries: [],
        currentStructure: null,
        planningId: null,
        planningStatus: null,
        weekDays: [],
        quota: null,
        savedCurrentCountedMinutes: 0,
    };

    const shared = {
        lastAgentOverviewData: null,
    };

    const dayNames = ['Lundi', 'Mardi', 'Mercredi', 'Jeudi', 'Vendredi'];

    function escapeHtml(value) {
        const div = document.createElement('div');
        div.textContent = String(value ?? '');
        return div.innerHTML;
    }

    function showMessage(text, type = 'info') {
        if (!elements.messageBox) return;
        elements.messageBox.className = `message message-${type}`;
        elements.messageBox.textContent = text;
    }

    function clearMessage() {
        if (!elements.messageBox) return;
        elements.messageBox.className = 'message';
        elements.messageBox.textContent = '';
    }

    async function readJsonResponse(response) {
        const raw = await response.text();

        if (!raw.trim()) {
            throw new Error(`Le serveur a renvoyé une réponse vide (HTTP ${response.status}).`);
        }

        try {
            return JSON.parse(raw);
        } catch (error) {
            const readable = raw
                .replace(/<br\s*\/?\s*>/gi, ' ')
                .replace(/<[^>]+>/g, ' ')
                .replace(/&nbsp;/gi, ' ')
                .replace(/&quot;/gi, '"')
                .replace(/&#039;/gi, "'")
                .replace(/&lt;/gi, '<')
                .replace(/&gt;/gi, '>')
                .replace(/&amp;/gi, '&')
                .replace(/\s+/g, ' ')
                .trim();

            throw new Error(
                `Le serveur PHP n'a pas renvoyé du JSON valide. ${readable.slice(0, 500) || 'Consultez les logs PHP.'}`
            );
        }
    }

    function apiErrorMessage(data, fallback) {
        const base = data?.error || fallback;
        return data?.details ? `${base} Détail : ${data.details}` : base;
    }

    function toIsoDate(date) {
        const year = date.getFullYear();
        const month = String(date.getMonth() + 1).padStart(2, '0');
        const day = String(date.getDate()).padStart(2, '0');
        return `${year}-${month}-${day}`;
    }

    function parseIsoWeek(value) {
        const match = /^(\d{4})-W(\d{2})$/.exec(value);
        if (!match) return [];

        const year = Number(match[1]);
        const week = Number(match[2]);
        const jan4 = new Date(year, 0, 4);
        const jan4Day = jan4.getDay() || 7;
        const monday = new Date(jan4);
        monday.setDate(jan4.getDate() - jan4Day + 1 + (week - 1) * 7);

        return Array.from({ length: 5 }, (_, index) => {
            const date = new Date(monday);
            date.setDate(monday.getDate() + index);
            return {
                date: toIsoDate(date),
                label: dayNames[index],
                display: date.toLocaleDateString('fr-FR', { day: '2-digit', month: '2-digit' }),
            };
        });
    }

    function timeToMinutes(time) {
        const [hours, minutes] = String(time).split(':').map(Number);
        return hours * 60 + minutes;
    }

    function formatDuration(minutes) {
        const sign = minutes < 0 ? '-' : '';
        const absolute = Math.abs(Math.round(minutes));
        const hours = Math.floor(absolute / 60);
        const mins = absolute % 60;
        return `${sign}${hours} h ${String(mins).padStart(2, '0')}`;
    }

    function formatDate(value) {
        if (!value) return '';
        const [year, month, day] = String(value).split('-');
        return `${day}/${month}/${year}`;
    }

    function motifInfo(id) {
        const motif = (window.PTA_CONFIG?.motifs || []).find((item) => Number(item.id) === Number(id));
        return motif ? {
            id: Number(motif.id),
            code: motif.code,
            label: motif.label,
            quota: Boolean(motif.quota),
        } : null;
    }

    window.PTA = {
        config: window.PTA_CONFIG || {},
        elements,
        state,
        shared,
        modules: {},
        utils: {
            escapeHtml,
            showMessage,
            clearMessage,
            readJsonResponse,
            apiErrorMessage,
            parseIsoWeek,
            timeToMinutes,
            formatDuration,
            formatDate,
            motifInfo,
        },
    };
})();