// account.js
document.addEventListener('DOMContentLoaded', () => {

    const toast = document.getElementById('account-toast');

    function showToast(msg, isError = false) {
        toast.textContent = msg;
        toast.classList.toggle('account-toast--error', isError);
        toast.classList.add('account-toast--visible');
        setTimeout(() => toast.classList.remove('account-toast--visible'), 3000);
    }

    async function patchJson(url, data) {
        const res = await fetch(url, {
            method:  'PATCH',
            headers: { 'Content-Type': 'application/json' },
            body:    JSON.stringify(data),
        });
        const json = await res.json();
        if (!res.ok) throw new Error(json.error ?? 'Fehler');
        return json;
    }

    // ── Account-Formular ──────────────────────────────────────────────────────
    const btnAccountSave = document.getElementById('btn-account-save');
    if (btnAccountSave) {
        btnAccountSave.addEventListener('click', async () => {
            try {
                await patchJson('/api/account', {
                    name:             document.getElementById('account-name').value.trim(),
                    trackingInterval: parseInt(document.getElementById('account-interval').value, 10),
                });
                showToast('Gespeichert.');
            } catch (e) {
                showToast(e.message, true);
            }
        });
    }

    // ── Besitzer des Accounts ─────────────────────────────────────────────────
    const superadminSelect = document.getElementById('superadmin-select');
    if (superadminSelect && !superadminSelect.disabled) {
        superadminSelect.addEventListener('change', async () => {
            const selectedName = superadminSelect.options[superadminSelect.selectedIndex].text;
            if (!confirm(`${selectedName} zum neuen Kontoinhaber machen?`)) {
                // Auswahl zurücksetzen
                superadminSelect.value = superadminSelect.dataset.original;
                return;
            }

            try {
                await patchJson('/api/account/superadmin', {
                    userId: parseInt(superadminSelect.value, 10),
                });
                showToast('Kontoinhaber geändert. Seite wird neu geladen…');
                setTimeout(() => window.location.reload(), 1500);
            } catch (e) {
                showToast(e.message, true);
                superadminSelect.value = superadminSelect.dataset.original;
            }
        });

        // Original-Wert merken für Rollback
        superadminSelect.dataset.original = superadminSelect.value;
    }

    // ── Passwort-Toggle ───────────────────────────────────────────────────────
    const btnPwToggle = document.getElementById('btn-pw-toggle');
    const pwSection   = document.getElementById('pw-section');
    if (btnPwToggle && pwSection) {
        btnPwToggle.addEventListener('click', (e) => {
            e.preventDefault();
            const open       = !pwSection.hidden;
            pwSection.hidden = open;
            btnPwToggle.textContent = open ? 'ändern' : 'abbrechen';
        });
    }

    // ── Benutzer-Formular ─────────────────────────────────────────────────────
    const btnUserSave = document.getElementById('btn-user-save');
    if (btnUserSave) {
        btnUserSave.addEventListener('click', async () => {
            const data = {
                firstName: document.getElementById('user-firstname').value.trim(),
                lastName:  document.getElementById('user-lastname').value.trim(),
                email:     document.getElementById('user-email').value.trim(),
            };

            if (pwSection && !pwSection.hidden) {
                const pwNew    = document.getElementById('user-pw-new').value;
                const pwRepeat = document.getElementById('user-pw-repeat').value;
                if (pwNew !== pwRepeat) {
                    showToast('Die Passwörter stimmen nicht überein.', true);
                    return;
                }
                data.currentPassword = document.getElementById('user-pw-current').value;
                data.newPassword     = pwNew;
            }

            try {
                await patchJson('/api/account/user', data);
                showToast('Gespeichert.');
                if (pwSection) {
                    pwSection.hidden = true;
                    document.getElementById('btn-pw-toggle').textContent = 'ändern';
                    ['user-pw-current', 'user-pw-new', 'user-pw-repeat'].forEach(id => {
                        document.getElementById(id).value = '';
                    });
                }
            } catch (e) {
                showToast(e.message, true);
            }
        });
    }
});