// assets/scripts/report.js

import {
    parseDuration,
    roundToQuarter,
    formatMinutes,
    validateDuration,
    initDurationBlurHandler,
} from './duration.js';

// ── Hilfsfunktionen ───────────────────────────────────────────────────────────

function t(key) {
    return window.Report?.i18n?.[key] ?? key;
}

function populateProjectSelect(select, selectedId) {
    const projects = window.Report?.projects ?? [];
    select.innerHTML = '';
    projects.forEach(p => {
        const opt = document.createElement('option');
        opt.value       = p.id;
        opt.textContent = `${p.clientName} / ${p.name}`;
        if (p.id === selectedId) opt.selected = true;
        select.appendChild(opt);
    });
}

function populateServiceSelect(select, selectedId) {
    const services    = window.Report?.services ?? [];
    const billable    = services.filter(s => s.billable);
    const notBillable = services.filter(s => !s.billable);

    select.innerHTML = `<option value="">${t('selectPh')}</option>`;

    function addGroup(label, list) {
        if (!list.length) return;
        const group = document.createElement('optgroup');
        group.label = label;
        list.forEach(s => {
            const opt = document.createElement('option');
            opt.value       = s.id;
            opt.textContent = s.name;
            if (s.id === selectedId) opt.selected = true;
            group.appendChild(opt);
        });
        select.appendChild(group);
    }

    addGroup(t('billable'),    billable);
    addGroup(t('notBillable'), notBillable);
}

// ── Edit öffnen ───────────────────────────────────────────────────────────────

function openEdit(row) {
    document.querySelectorAll('.report-table__row--editing').forEach(r => {
        if (r !== row) closeEdit(r);
    });

    const editForm = row.querySelector('.report-row__edit');
    if (!editForm) return;

    // Selects klonen um akkumulierte Listener zu vermeiden
    const oldProjectSel = row.querySelector('.edit-project');
    const oldServiceSel = row.querySelector('.edit-service');
    const projectSel    = oldProjectSel.cloneNode(false);
    const serviceSel    = oldServiceSel.cloneNode(false);
    oldProjectSel.replaceWith(projectSel);
    oldServiceSel.replaceWith(serviceSel);

    const projectId = parseInt(row.dataset.projectId) || null;
    const serviceId = parseInt(row.dataset.serviceId) || null;

    populateProjectSelect(projectSel, projectId);
    populateServiceSelect(serviceSel, serviceId);

    projectSel.addEventListener('change', () => {
        populateServiceSelect(row.querySelector('.edit-service'), null);
    });

    editForm.hidden = false;
    row.classList.add('report-table__row--editing');
    row.querySelector('.edit-duration')?.focus();
}

function closeEdit(row) {
    const editForm = row.querySelector('.report-row__edit');
    if (!editForm) return;
    editForm.hidden = true;
    row.classList.remove('report-table__row--editing');
}

// ── Speichern ─────────────────────────────────────────────────────────────────

async function saveEdit(row) {
    const id          = row.dataset.entryId;
    const durationRaw = row.querySelector('.edit-duration')?.value ?? '0:00';
    const projectId   = row.querySelector('.edit-project')?.value;
    const serviceId   = row.querySelector('.edit-service')?.value;
    const note        = row.querySelector('.edit-note')?.value ?? '';

    if (!projectId) { alert(t('errorNoProject')); return; }

    const rawMinutes = roundToQuarter(parseDuration(durationRaw));

    if (rawMinutes === 0) { alert(t('errorZeroDuration')); return; }

    const validation = validateDuration(rawMinutes);
    if (validation.status === 'error') { alert(t('errorDurationTooLong')); return; }
    if (validation.status === 'warn' && !confirm(t('warnDurationLong'))) return;

    try {
        const res = await fetch(`/api/entries/${id}`, {
            method:  'PATCH',
            headers: { 'Content-Type': 'application/json' },
            body:    JSON.stringify({
                duration:  formatMinutes(rawMinutes),
                projectId: parseInt(projectId),
                serviceId: serviceId ? parseInt(serviceId) : null,
                note:      note || null,
            }),
        });

        if (!res.ok) { alert(t('errorSave')); return; }

        window.location.reload();

    } catch {
        alert(t('errorSave'));
    }
}

// ── Löschen ───────────────────────────────────────────────────────────────────

async function deleteEntry(row) {
    if (!confirm(t('confirmDelete'))) return;

    const id = row.dataset.entryId;

    try {
        const res = await fetch(`/api/entries/${id}`, { method: 'DELETE' });
        if (!res.ok) { alert(t('errorDelete')); return; }
        window.location.reload();
    } catch {
        alert(t('errorDelete'));
    }
}

// ── Abgerechnet toggeln ───────────────────────────────────────────────────────

async function toggleInvoiced(row) {
    const id  = row.dataset.entryId;
    const btn = row.querySelector('[data-action="toggle-invoiced"]');

    try {
        const res = await fetch(`/api/entries/${id}/invoiced`, { method: 'PATCH' });
        if (!res.ok) return;

        const data     = await res.json();
        const invoiced = data.invoiced;

        row.dataset.invoiced = invoiced ? 'true' : 'false';
        row.classList.toggle('report-table__row--invoiced', invoiced);

        if (btn) {
            btn.classList.toggle('report-lock--invoiced', invoiced);
            btn.title = invoiced ? t('btnUnlock') : t('btnLock');
        }

    } catch (err) {
        console.error('Fehler beim Toggeln des Abrechnungsstatus:', err);
    }
}

// ── Event-Delegation ──────────────────────────────────────────────────────────

document.addEventListener('DOMContentLoaded', () => {
    initDurationBlurHandler();

    const table = document.querySelector('.report-table');
    if (!table) return;

    table.addEventListener('click', e => {
        const btn = e.target.closest('[data-action]');
        if (!btn) return;

        const row = btn.closest('.report-table__row');
        if (!row) return;

        switch (btn.dataset.action) {
            case 'edit':             openEdit(row);       break;
            case 'cancel':           closeEdit(row);      break;
            case 'save':             saveEdit(row);       break;
            case 'delete':           deleteEntry(row);    break;
            case 'toggle-invoiced':  toggleInvoiced(row); break;
        }
    });
});

// ── ReportFilter ──────────────────────────────────────────────────────────────

class ReportFilter {
    constructor() {
        this.panel       = document.getElementById('report-filter');
        this.toggleBtn   = document.getElementById('btn-filter-toggle');
        this.applyBtn    = document.getElementById('btn-filter-apply');
        this.hideBtn     = document.getElementById('btn-filter-hide');
        this.periodSel   = document.querySelector('.filter-period-select');
        this.customDates = document.querySelector('.filter-custom-dates');
    }

    init() {
        if (!this.panel) return;

        // Toolbar-Toggle
        this.toggleBtn?.addEventListener('click', () => this.togglePanel());

        // Ausblenden-Button
        this.hideBtn?.addEventListener('click', () => this.hidePanel());

        // Filtern-Button
        this.applyBtn?.addEventListener('click', () => this.applyFilters());

        // Checkbox-Änderungen
        this.panel.querySelectorAll('.filter-row__checkbox').forEach(cb => {
            cb.addEventListener('change', () => {
                const row = cb.closest('.filter-row');
                this.syncRowState(row, cb.checked);
            });
        });

        // Klick auf ausgegrautem Control → Checkbox aktivieren
        this.panel.querySelectorAll('.filter-select, .filter-note-input').forEach(el => {
            el.addEventListener('mousedown', () => this.activateRowByControl(el));
        });

        // Zeitraum-Select → Custom-Felder zeigen/verstecken
        this.periodSel?.addEventListener('change', () => {
            const row = this.periodSel.closest('.filter-row');
            this.activateRowByControl(this.periodSel);
            this.toggleCustomDates(this.periodSel.value === 'custom');
        });

        // Plus-Buttons
        this.panel.querySelectorAll('.filter-row__add').forEach(btn => {
            btn.addEventListener('click', () => this.addControl(btn));
        });

        // Remove-Buttons (via Delegation, da sie dynamisch entstehen)
        this.panel.addEventListener('click', e => {
            const removeBtn = e.target.closest('.filter-row__remove');
            if (removeBtn) this.removeControl(removeBtn);
        });

        // Select-Änderung → Optionen in der Gruppe aktualisieren
        this.panel.addEventListener('change', e => {
            const sel = e.target.closest('.filter-select');
            if (!sel) return;
            const container = sel.closest('.filter-row__controls');
            if (container) this.refreshGroupSelects(container);
        });

        // Initialer Zustand
        this.panel.querySelectorAll('.filter-row').forEach(row => {
            const cb = row.querySelector('.filter-row__checkbox');
            this.syncRowState(row, cb?.checked ?? false);
        });

        // Bereits geladene Mehrfach-Selects deduplizieren (nach Seiten-Reload mit Filtern)
        this.panel.querySelectorAll('.filter-row__controls').forEach(container => {
            this.refreshGroupSelects(container);
        });
    }

    // ── Panel toggeln ─────────────────────────────────────────────────────────

    togglePanel() {
        const isHidden = this.panel.hasAttribute('hidden');
        if (isHidden) {
            this.panel.removeAttribute('hidden');
            this.toggleBtn?.classList.add('report-toolbar__action--active');
        } else {
            this.hidePanel();
        }
    }

    hidePanel() {
        this.panel.setAttribute('hidden', '');
        this.toggleBtn?.classList.remove('report-toolbar__action--active');
    }

    // ── Row-Zustand (aktiv / inaktiv) ─────────────────────────────────────────

    syncRowState(row, active) {
        row.classList.toggle('filter-row--inactive', !active);
    }

    activateRowByControl(el) {
        const row = el.closest('.filter-row');
        if (!row) return;
        const cb = row.querySelector('.filter-row__checkbox');
        if (cb && !cb.checked) {
            cb.checked = true;
            this.syncRowState(row, true);
        }
    }

    // ── Zeitraum: Custom-Felder ────────────────────────────────────────────────

    toggleCustomDates(show) {
        if (!this.customDates) return;
        if (show) {
            this.customDates.removeAttribute('hidden');
        } else {
            this.customDates.setAttribute('hidden', '');
        }
    }

    // ── Plus: weiteres Control hinzufügen ─────────────────────────────────────

    addControl(btn) {
        const targetId = btn.dataset.target;
        const filterKey = btn.dataset.filterKey;
        const container = document.getElementById(targetId);
        if (!container) return;

        // Erste Gruppe als Template klonen
        const template = container.querySelector('.filter-row__control-group');
        if (!template) return;

        const clone = template.cloneNode(true);

        // Select zurücksetzen
        const clonedSelect = clone.querySelector('.filter-select');
        if (clonedSelect) clonedSelect.value = '';

        // Remove-Button hinzufügen (falls noch keiner da)
        if (!clone.querySelector('.filter-row__remove')) {
            const removeBtn = document.createElement('button');
            removeBtn.type = 'button';
            removeBtn.className = 'filter-row__remove';
            removeBtn.textContent = '×';
            clone.appendChild(removeBtn);
        }

        // Neu: Klick auf den geklonten Select aktiviert ebenfalls die Row
        clone.querySelector('.filter-select')?.addEventListener('mousedown', () => {
            this.activateRowByControl(clone.querySelector('.filter-select'));
        });

        container.appendChild(clone);

        // Optionen deduplizieren
        this.refreshGroupSelects(container);

        // Row aktivieren
        const row = btn.closest('.filter-row');
        const cb  = row?.querySelector('.filter-row__checkbox');
        if (cb && !cb.checked) {
            cb.checked = true;
            this.syncRowState(row, true);
        }

        clonedSelect?.focus();
    }

    // ── Minus: Control entfernen ──────────────────────────────────────────────

    removeControl(removeBtn) {
        const group = removeBtn.closest('.filter-row__control-group');
        const container = group?.parentElement;
        group?.remove();

        // Wenn keine Controls mehr übrig → Checkbox deaktivieren
        if (container && !container.querySelector('.filter-row__control-group')) {
            const row = container.closest('.filter-row');
            const cb  = row?.querySelector('.filter-row__checkbox');
            if (cb) {
                cb.checked = false;
                this.syncRowState(row, false);
            }
        }

        // Verbleibende Selects aktualisieren
        if (container) this.refreshGroupSelects(container);
    }

    // ── Optionen in Mehrfach-Selects deduplizieren ────────────────────────────

    refreshGroupSelects(container) {
        const selects = [...container.querySelectorAll('.filter-select')];
        if (selects.length < 2) return;

        // Alle gewählten Values sammeln
        const selectedValues = new Set(
            selects.map(s => s.value).filter(v => v !== '')
        );

        selects.forEach(sel => {
            const ownValue = sel.value;
            sel.querySelectorAll('option').forEach(opt => {
                if (!opt.value) return; // "..." immer sichtbar lassen
                // Verstecken wenn woanders gewählt, aber nicht beim eigenen Select
                opt.hidden = selectedValues.has(opt.value) && opt.value !== ownValue;
            });
        });
    }

    // ── Filter anwenden → URL bauen und navigieren ────────────────────────────

    applyFilters() {
        const params = new URLSearchParams();
        params.set('limit', String(window.Report?.limit ?? 50));

        this.panel.querySelectorAll('.filter-row').forEach(row => {
            const cb  = row.querySelector('.filter-row__checkbox');
            if (!cb?.checked) return;

            const key = row.dataset.filterKey;

            if (['clients', 'projects', 'services', 'users'].includes(key)) {
                row.querySelectorAll('.filter-select').forEach(sel => {
                    if (sel.value) params.append(`filter[${key}][]`, sel.value);
                });

            } else if (key === 'period') {
                const val = this.periodSel?.value;
                if (!val) return;
                params.set('filter[period]', val);

                if (val === 'custom' && this.customDates) {
                    const get = field => this.customDates.querySelector(`[data-date-field="${field}"]`)?.value ?? '';
                    const fromDay   = get('from-day').padStart(2, '0');
                    const fromMonth = get('from-month').padStart(2, '0');
                    const fromYear  = get('from-year');
                    const toDay     = get('to-day').padStart(2, '0');
                    const toMonth   = get('to-month').padStart(2, '0');
                    const toYear    = get('to-year');

                    if (fromYear && fromMonth && fromDay) {
                        params.set('filter[date_from]', `${fromYear}-${fromMonth}-${fromDay}`);
                    }
                    if (toYear && toMonth && toDay) {
                        params.set('filter[date_to]', `${toYear}-${toMonth}-${toDay}`);
                    }
                }

            } else if (key === 'note') {
                const val = row.querySelector('.filter-note-input')?.value?.trim();
                if (val) params.set('filter[note]', val);

            } else if (key === 'invoiced') {
                const checked = row.querySelector('.filter-invoiced-radio:checked');
                if (checked) params.set('filter[invoiced]', checked.value);
            }
        });

        window.location.href = `/reports/times?${params}`;
    }
}

// ── Init ──────────────────────────────────────────────────────────────────────

document.addEventListener('DOMContentLoaded', () => {
    new ReportFilter().init();
});