// assets/scripts/report.js

import { parseAndValidate, initDurationBlurHandler } from './duration.js';
import { esc, createTranslator } from './utils.js';

const t = createTranslator('Report');

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

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;

  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, 10) || null;
  const serviceId = parseInt(row.dataset.serviceId, 10) || 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 saveBtn = row.querySelector('[data-action="save"]');
  if (saveBtn?.disabled) return;

  const id        = row.dataset.entryId;
  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 dur = parseAndValidate(row.querySelector('.edit-duration')?.value ?? '0:00');
  if (dur.error) { alert(t(dur.error)); return; }
  if (dur.warn && !confirm(t(dur.warn))) return;

  if (saveBtn) saveBtn.disabled = true;
  try {
    const res = await fetch(`/api/entries/${id}`, {
      method:  'PATCH',
      headers: { 'Content-Type': 'application/json' },
      body:    JSON.stringify({
        duration:  dur.formatted,
        projectId: parseInt(projectId, 10),
        serviceId: serviceId ? parseInt(serviceId, 10) : null,
        note:      note || null,
      }),
    });

    if (!res.ok) {
      const err = await res.json().catch(() => ({}));
      alert(err.error ?? t('errorSave'));
      return;
    }

    window.location.reload();
  } catch {
    alert(t('errorSave'));
  } finally {
    if (saveBtn) saveBtn.disabled = false;
  }
}

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

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

  try {
    const res = await fetch(`/api/entries/${row.dataset.entryId}`, { 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('toggleInvoiced error:', err);
  }
}

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

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

  const table = document.querySelector('.report-table');
  if (table) {
    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;
      }
    });
  }

  new ReportFilter().init();
  initExportButtons();
  initPrintButton();
});

// ── 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;

    this.toggleBtn?.addEventListener('click', () => this.togglePanel());
    this.hideBtn?.addEventListener('click', () => this.hidePanel());
    this.applyBtn?.addEventListener('click', () => this.applyFilters());

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

    this.panel.querySelectorAll('.filter-select, .filter-note-input').forEach(el => {
      el.addEventListener('mousedown', () => this.activateRowByControl(el));
    });

    this.periodSel?.addEventListener('change', () => {
      this.activateRowByControl(this.periodSel);
      this.toggleCustomDates(this.periodSel.value === 'custom');
    });

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

    this.panel.addEventListener('click', e => {
      const removeBtn = e.target.closest('.filter-row__remove');
      if (removeBtn) this.removeControl(removeBtn);
    });

    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);
    });

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

    this.panel.querySelectorAll('.filter-row__controls').forEach(container => {
      this.refreshGroupSelects(container);
    });
  }

  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');
  }

  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);
    }
  }

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

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

    const template = container.querySelector('.filter-row__control-group');
    if (!template) return;

    const clone = template.cloneNode(true);

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

    if (!clone.querySelector('.filter-row__remove')) {
      const removeBtn = document.createElement('button');
      removeBtn.type = 'button';
      removeBtn.className = 'filter-row__remove';
      removeBtn.textContent = '×';
      clone.appendChild(removeBtn);
    }

    clone.querySelector('.filter-select')?.addEventListener('mousedown', () => {
      this.activateRowByControl(clone.querySelector('.filter-select'));
    });

    container.appendChild(clone);
    this.refreshGroupSelects(container);

    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();
  }

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

    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);
      }
    }

    if (container) this.refreshGroupSelects(container);
  }

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

    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;
        opt.hidden = selectedValues.has(opt.value) && opt.value !== ownValue;
      });
    });
  }

  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[${key}][]`, sel.value);
        });
        if (row.querySelector('.filter-neg-checkbox')?.checked) {
          params.set(`filter[${key}_neg]`, '1');
        }

      } 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}`);
          }
        }
        if (row.querySelector('.filter-neg-checkbox')?.checked) {
          params.set('filter[period_neg]', '1');
        }

      } 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}`;
  }
}

// ── Export ────────────────────────────────────────────────────────────────────

function initExportButtons() {
  ['excel', 'csv', 'pdf'].forEach(format => {
    document.getElementById(`btn-export-${format}`)?.addEventListener('click', () => {
      const params = new URLSearchParams(window.location.search);
      params.delete('limit');
      window.location.href = `/reports/export/${format}?${params}`;
    });
  });
}

function initPrintButton() {
  document.getElementById('btn-print')?.addEventListener('click', () => {
    window.print();
  });
}