import { useEffect, useState } from 'react';
import { apiGet, apiPut, apiPost, apiDelete } from '../api.js';

const API_SCOPES = [
    { id: 'message', label: 'message', hint: 'Nachrichten/Embeds in Kanäle posten' },
    { id: 'dm', label: 'dm', hint: 'Direktnachrichten senden' },
    { id: 'roles', label: 'roles', hint: 'Rollen geben/nehmen' },
    { id: 'read', label: 'read', hint: 'Member-Infos & Statistiken lesen' },
];

/** Sekunden → "2d 4h 13m" */
function fmtUptime(s) {
    const d = Math.floor(s / 86400);
    const h = Math.floor((s % 86400) / 3600);
    const m = Math.floor((s % 3600) / 60);
    return [d && `${d}d`, (d || h) && `${h}h`, `${m}m`].filter(Boolean).join(' ');
}

function fmtBytes(b) {
    if (b > 1024 * 1024) return `${(b / 1024 / 1024).toFixed(1)} MB`;
    return `${(b / 1024).toFixed(0)} KB`;
}

export default function Settings({ me }) {
    const [data, setData] = useState(null);
    const [form, setForm] = useState(null);
    const [error, setError] = useState(null);
    const [feedback, setFeedback] = useState(null);
    // Community
    const [playtesters, setPlaytesters] = useState([]);
    // Composer
    const [composer, setComposer] = useState({ channel: '', title: '', text: '', messageId: '' });
    // API-Keys
    const [keys, setKeys] = useState([]);
    const [newKeyName, setNewKeyName] = useState('');
    const [newKeyScopes, setNewKeyScopes] = useState(['message']);
    const [createdKey, setCreatedKey] = useState(null);

    useEffect(() => {
        if (!me.admin) return;
        apiGet('/api/settings')
            .then((d) => {
                setData(d);
                setForm(d.settings);
            })
            .catch((e) => setError(e.status));
        apiGet('/api/apikeys').then((d) => setKeys(d.keys)).catch(() => {});
        apiGet('/api/playtesters').then((d) => setPlaytesters(d.playtesters)).catch(() => {});
    }, [me.admin]);

    async function createKey() {
        if (!newKeyName.trim() || newKeyScopes.length === 0) return;
        try {
            const res = await apiPost('/api/apikeys', { name: newKeyName.trim(), scopes: newKeyScopes });
            setCreatedKey(res);
            setNewKeyName('');
            setKeys((await apiGet('/api/apikeys')).keys);
        } catch {
            flash('✗ Key-Erstellung fehlgeschlagen');
        }
    }

    async function revokeKey(id) {
        if (!window.confirm('Diesen API-Key widerrufen? Skripte mit diesem Key verlieren sofort den Zugriff.')) return;
        await apiDelete(`/api/apikeys/${id}`).catch(() => {});
        setKeys((await apiGet('/api/apikeys')).keys);
        if (createdKey?.id === id) setCreatedKey(null);
    }

    function flash(msg) {
        setFeedback(msg);
        setTimeout(() => setFeedback(null), 3000);
    }

    async function save() {
        try {
            const res = await apiPut('/api/settings', form);
            setForm(res.settings);
            flash('✓ Gespeichert');
        } catch {
            flash('✗ Speichern fehlgeschlagen');
        }
    }

    async function sendCompose() {
        if (!composer.channel || !composer.text.trim()) {
            flash('✗ Kanal und Text nötig');
            return;
        }
        try {
            const res = await apiPost('/api/compose', {
                channel_id: composer.channel,
                message_id: composer.messageId.trim() || undefined,
                embed_title: composer.title.trim() || undefined,
                content: composer.text,
            });
            flash(res.edited ? '✓ Aktualisiert' : `✓ Gesendet (ID ${res.message_id})`);
            if (!res.edited) setComposer({ ...composer, messageId: res.message_id });
        } catch {
            flash('✗ Senden fehlgeschlagen');
        }
    }

    async function sendTest(target) {
        try {
            await apiPost(`/api/settings/test/${target}`);
            flash('✓ Test-Nachricht gesendet');
        } catch {
            flash('✗ Test fehlgeschlagen — Kanal/Rechte prüfen');
        }
    }

    const header = (
        <section className="page-header">
            <div className="page-bg-text">SETUP</div>
            <div className="page-header-grid" aria-hidden="true" />
            <div className="page-header-content">
                <div className="page-tag">// Admin</div>
                <h1 className="page-title">Setup</h1>
                <p className="page-subtitle">Kanäle, Feed-Regeln und Status — Änderungen greifen sofort.</p>
            </div>
        </section>
    );

    if (me.loading) return <>{header}<section className="content"><p className="notice">Lade …</p></section></>;
    if (!me.user || !me.admin) {
        return (
            <>
                {header}
                <section className="content">
                    <div className="notice center">
                        <p>🔒 Nur für den Admin.</p>
                        {!me.user && <a className="btn" href="/auth/login">Login mit Discord</a>}
                    </div>
                </section>
            </>
        );
    }
    if (error) return <>{header}<section className="content"><p className="notice">Fehler beim Laden ({error}).</p></section></>;
    if (!data || !form) return <>{header}<section className="content"><p className="notice">Lade …</p></section></>;

    const channelOptions = data.channels.map((c) => (
        <option key={c.id} value={c.id}>
            #{c.name} — {c.guild}
        </option>
    ));

    return (
        <>
            {header}
            <section className="content">
                {/* Status */}
                <div className="settings-section">
                    <h2 className="settings-title">// Status</h2>
                    <div className="stats">
                        <div className="stat"><span className="stat-value">{data.status.botTag ?? '—'}</span><span className="stat-label">Bot</span></div>
                        <div className="stat"><span className="stat-value">{fmtUptime(data.status.uptimeSeconds)}</span><span className="stat-label">Uptime</span></div>
                        <div className="stat"><span className="stat-value">{data.status.devlogs}</span><span className="stat-label">Devlogs</span></div>
                        <div className="stat"><span className="stat-value">{data.status.commits}</span><span className="stat-label">Commits</span></div>
                        <div className="stat"><span className="stat-value">{fmtBytes(data.status.dbSizeBytes)}</span><span className="stat-label">Datenbank</span></div>
                        <div className="stat">
                            <span className="stat-value">{data.status.lastBackup ? data.status.lastBackup.slice(0, 10) : '—'}</span>
                            <span className="stat-label">Letztes Backup</span>
                        </div>
                    </div>
                </div>

                {/* Allgemein */}
                <div className="settings-section">
                    <h2 className="settings-title">// Allgemein</h2>
                    <div className="field">
                        <label>Öffentliche URL <span className="field-hint">Basis für Buttons, RSS und OAuth-Redirect (Redirect auch im Dev-Portal eintragen)</span></label>
                        <input
                            type="text"
                            placeholder="https://bot.d4rkst3r.de"
                            value={form.public_url}
                            onChange={(e) => setForm({ ...form, public_url: e.target.value })}
                        />
                    </div>
                    <div className="field">
                        <label>Gitea-URL <span className="field-hint">Basis für die Issue-API (/bug)</span></label>
                        <input
                            type="text"
                            placeholder="https://git.d4rkst3r.de"
                            value={form.gitea_url}
                            onChange={(e) => setForm({ ...form, gitea_url: e.target.value })}
                        />
                    </div>
                </div>

                {/* Kanäle */}
                <div className="settings-section">
                    <h2 className="settings-title">// Kanäle</h2>

                    <div className="field">
                        <label>Devlog-Kanal <span className="field-hint">öffentlich — hier postet der Bot die Devlogs</span></label>
                        <div className="field-row">
                            <select
                                value={form.devlog_channel_id ?? ''}
                                onChange={(e) => setForm({ ...form, devlog_channel_id: e.target.value })}
                            >
                                <option value="" disabled>— Kanal wählen —</option>
                                {channelOptions}
                            </select>
                            <button className="btn" onClick={() => sendTest('devlog')}>Test senden</button>
                        </div>
                    </div>

                    <div className="field">
                        <label>Commit-Kanal <span className="field-hint">privat — hier landen die Push-Embeds</span></label>
                        <div className="field-row">
                            <select
                                value={form.commit_channel_id ?? ''}
                                onChange={(e) => setForm({ ...form, commit_channel_id: e.target.value })}
                            >
                                <option value="" disabled>— Kanal wählen —</option>
                                {channelOptions}
                            </select>
                            <button className="btn" onClick={() => sendTest('commit')}>Test senden</button>
                        </div>
                    </div>

                    <div className="field">
                        <label>Release-Kanal <span className="field-hint">Ankündigungen bei neuen Gitea-Releases — leer = aus</span></label>
                        <div className="field-row">
                            <select
                                value={form.release_channel_id ?? ''}
                                onChange={(e) => setForm({ ...form, release_channel_id: e.target.value })}
                            >
                                <option value="">— deaktiviert —</option>
                                {channelOptions}
                            </select>
                            <button className="btn" onClick={() => sendTest('release')}>Test senden</button>
                        </div>
                    </div>
                </div>

                {/* Devlog */}
                <div className="settings-section">
                    <h2 className="settings-title">// Devlog</h2>
                    <div className="field">
                        <label>Ping-Rolle <span className="field-hint">wird bei jedem Devlog-Post erwähnt; Member abonnieren sie über den 🔔-Button am Post — leer = kein Ping</span></label>
                        <select
                            value={form.devlog_ping_role_id ?? ''}
                            onChange={(e) => setForm({ ...form, devlog_ping_role_id: e.target.value })}
                        >
                            <option value="">— kein Ping —</option>
                            {(data.roles ?? []).map((r) => (
                                <option key={r.id} value={r.id}>@{r.name} — {r.guild}</option>
                            ))}
                        </select>
                    </div>
                    <div className="field">
                        <label className="toggle">
                            <input
                                type="checkbox"
                                checked={form.weekly_recap_enabled}
                                onChange={(e) => setForm({ ...form, weekly_recap_enabled: e.target.checked })}
                            />
                            <span>Wochen-Rückblick (sonntags 20:00)</span>
                            <span className="field-hint">Commits pro Tag, Devlogs & Top-Projekte in den Devlog-Kanal</span>
                        </label>
                    </div>
                    <div className="field">
                        <label className="toggle">
                            <input
                                type="checkbox"
                                checked={form.devlog_threads_enabled}
                                onChange={(e) => setForm({ ...form, devlog_threads_enabled: e.target.checked })}
                            />
                            <span>Diskussions-Thread unter jedem Devlog</span>
                            <span className="field-hint">Bot öffnet automatisch „💬 Devlog &lt;Datum&gt;"</span>
                        </label>
                    </div>
                    <div className="field">
                        <button className="btn" onClick={() => sendTest('recap')}>Rückblick jetzt testen</button>
                    </div>
                </div>

                {/* Bug-Reports */}
                <div className="settings-section">
                    <h2 className="settings-title">// Bug-Reports (/bug)</h2>
                    {!data.status.giteaTokenConfigured && (
                        <p className="notice" style={{ padding: '0 0 .8rem' }}>
                            ⚠️ Kein <code>GITEA_API_TOKEN</code> gesetzt — /bug ist deaktiviert.
                        </p>
                    )}
                    <div className="field">
                        <label>Ziel-Repo <span className="field-hint">hier landen die Issues aus /bug</span></label>
                        <input
                            type="text"
                            placeholder="D4rkst3r/EcoGame"
                            value={form.bug_report_repo}
                            onChange={(e) => setForm({ ...form, bug_report_repo: e.target.value })}
                        />
                    </div>
                    <div className="field">
                        <label>Roadmap-Repo <span className="field-hint">Milestones dieses Repos speisen die öffentliche /roadmap-Seite</span></label>
                        <input
                            type="text"
                            placeholder="D4rkst3r/EcoGame"
                            value={form.roadmap_repo}
                            onChange={(e) => setForm({ ...form, roadmap_repo: e.target.value })}
                        />
                    </div>
                </div>

                {/* Watchdog */}
                <div className="settings-section">
                    <h2 className="settings-title">// Watchdog</h2>
                    <div className="field">
                        <label>Überwachte URLs <span className="field-hint">kommagetrennt; bei Ausfall gibt's eine DM — leer = aus</span></label>
                        <input
                            type="text"
                            placeholder="https://git.d4rkst3r.de, https://bot.d4rkst3r.de/health"
                            value={form.watchdog_urls}
                            onChange={(e) => setForm({ ...form, watchdog_urls: e.target.value })}
                        />
                    </div>
                </div>

                {/* Community */}
                <div className="settings-section">
                    <h2 className="settings-title">// Community</h2>

                    <div className="field">
                        <label>Playtester-Rolle <span className="field-hint">Bewerbungs-Post via /playtester-setup; leer = aus</span></label>
                        <select
                            value={form.playtester_role_id ?? ''}
                            onChange={(e) => setForm({ ...form, playtester_role_id: e.target.value })}
                        >
                            <option value="">— deaktiviert —</option>
                            {(data.roles ?? []).map((r) => (
                                <option key={r.id} value={r.id}>@{r.name} — {r.guild}</option>
                            ))}
                        </select>
                        {playtesters.length > 0 && (
                            <div className="key-list" style={{ marginTop: '.8rem' }}>
                                {playtesters.map((p) => (
                                    <div className="key-row" key={p.user_id}>
                                        <span className="key-name">{p.username}</span>
                                        <span className="key-used">seit {p.applied_at.slice(0, 10)}</span>
                                    </div>
                                ))}
                            </div>
                        )}
                    </div>

                    <div className="field">
                        <label>Starboard-Kanal <span className="field-hint">Nachrichten mit genug ⭐ landen hier; leer = aus</span></label>
                        <div className="field-row">
                            <select
                                value={form.starboard_channel_id ?? ''}
                                onChange={(e) => setForm({ ...form, starboard_channel_id: e.target.value })}
                            >
                                <option value="">— deaktiviert —</option>
                                {channelOptions}
                            </select>
                            <input
                                type="text"
                                style={{ width: '7rem', flex: 'none' }}
                                title="Schwellwert (Anzahl ⭐)"
                                value={form.starboard_threshold}
                                onChange={(e) => setForm({ ...form, starboard_threshold: e.target.value })}
                            />
                        </div>
                    </div>

                    <div className="field">
                        <label>Screenshot-Kanal <span className="field-hint">Bilder landen in der öffentlichen Galerie; Historie: /galerie-backfill</span></label>
                        <select
                            value={form.screenshot_channel_id ?? ''}
                            onChange={(e) => setForm({ ...form, screenshot_channel_id: e.target.value })}
                        >
                            <option value="">— deaktiviert —</option>
                            {channelOptions}
                        </select>
                    </div>
                    <div className="field">
                        <label>Voting-Kanal <span className="field-hint">/wunsch postet hier; Rangliste auf der Roadmap-Seite</span></label>
                        <select
                            value={form.voting_channel_id ?? ''}
                            onChange={(e) => setForm({ ...form, voting_channel_id: e.target.value })}
                        >
                            <option value="">— deaktiviert —</option>
                            {channelOptions}
                        </select>
                    </div>
                </div>

                {/* Moderation & Kontakt */}
                <div className="settings-section">
                    <h2 className="settings-title">// Moderation &amp; Kontakt</h2>
                    <div className="field">
                        <label>Modmail-Kanal <span className="field-hint">PRIVATER Staff-Kanal — DMs an den Bot landen hier als Threads</span></label>
                        <select
                            value={form.modmail_channel_id ?? ''}
                            onChange={(e) => setForm({ ...form, modmail_channel_id: e.target.value })}
                        >
                            <option value="">— deaktiviert —</option>
                            {channelOptions}
                        </select>
                    </div>
                    <div className="field">
                        <label>Willkommens-Kanal <span className="field-hint">Begrüßungs-Embed für neue Member (braucht Server-Members-Intent im Dev-Portal!)</span></label>
                        <select
                            value={form.welcome_channel_id ?? ''}
                            onChange={(e) => setForm({ ...form, welcome_channel_id: e.target.value })}
                        >
                            <option value="">— deaktiviert —</option>
                            {channelOptions}
                        </select>
                    </div>
                    <div className="field">
                        <label>Mod-Log-Kanal <span className="field-hint">PRIVAT — gelöschte/bearbeitete Nachrichten</span></label>
                        <select
                            value={form.modlog_channel_id ?? ''}
                            onChange={(e) => setForm({ ...form, modlog_channel_id: e.target.value })}
                        >
                            <option value="">— deaktiviert —</option>
                            {channelOptions}
                        </select>
                    </div>
                    <div className="field">
                        <label>Ticket-Kanal <span className="field-hint">hier entstehen die privaten Ticket-Threads; Post via /ticket-setup</span></label>
                        <select
                            value={form.ticket_channel_id ?? ''}
                            onChange={(e) => setForm({ ...form, ticket_channel_id: e.target.value })}
                        >
                            <option value="">— deaktiviert —</option>
                            {channelOptions}
                        </select>
                    </div>
                </div>

                {/* Composer */}
                <div className="settings-section">
                    <h2 className="settings-title">// Post verfassen</h2>
                    <div className="field">
                        <label>Kanal</label>
                        <select value={composer.channel} onChange={(e) => setComposer({ ...composer, channel: e.target.value })}>
                            <option value="" disabled>— Kanal wählen —</option>
                            {channelOptions}
                        </select>
                    </div>
                    <div className="field">
                        <label>Embed-Titel <span className="field-hint">leer = normale Nachricht statt Embed</span></label>
                        <input
                            type="text"
                            placeholder="z. B. 📣 Ankündigung"
                            value={composer.title}
                            onChange={(e) => setComposer({ ...composer, title: e.target.value })}
                        />
                    </div>
                    <div className="field">
                        <label>Text <span className="field-hint">Discord-Markdown (##, **, Listen …)</span></label>
                        <textarea
                            rows={6}
                            value={composer.text}
                            onChange={(e) => setComposer({ ...composer, text: e.target.value })}
                        />
                    </div>
                    <div className="field">
                        <label>Message-ID <span className="field-hint">optional — vorhandenen Bot-Post bearbeiten statt neu senden</span></label>
                        <div className="field-row">
                            <input
                                type="text"
                                placeholder="leer = neue Nachricht"
                                value={composer.messageId}
                                onChange={(e) => setComposer({ ...composer, messageId: e.target.value })}
                            />
                            <button className="btn" onClick={sendCompose}>
                                {composer.messageId.trim() ? 'Aktualisieren' : 'Senden'}
                            </button>
                        </div>
                    </div>
                </div>

                {/* Game-Server */}
                <div className="settings-section">
                    <h2 className="settings-title">// Game-Server</h2>
                    <div className="field">
                        <label>Status-Kanal <span className="field-hint">persistentes Status-Embed, alle 2 min aktualisiert</span></label>
                        <select
                            value={form.status_channel_id ?? ''}
                            onChange={(e) => setForm({ ...form, status_channel_id: e.target.value })}
                        >
                            <option value="">— deaktiviert —</option>
                            {channelOptions}
                        </select>
                    </div>
                    <div className="field">
                        <label>Server <span className="field-hint">kommagetrennt Name=URL — FiveM-kompatibel (/dynamic.json)</span></label>
                        <input
                            type="text"
                            placeholder="z. B. FiveM=http://1.2.3.4:30120, EcoGame=http://…"
                            value={form.gameservers}
                            onChange={(e) => setForm({ ...form, gameservers: e.target.value })}
                        />
                    </div>
                </div>

                {/* Backups */}
                <div className="settings-section">
                    <h2 className="settings-title">// Backups</h2>
                    <div className="field">
                        <label className="toggle">
                            <input
                                type="checkbox"
                                checked={form.backup_enabled}
                                onChange={(e) => setForm({ ...form, backup_enabled: e.target.checked })}
                            />
                            <span>Nächtliches DB-Backup (03:00)</span>
                            <span className="field-hint">gzip nach data/backups/, 14 Tage Rotation</span>
                        </label>
                    </div>
                    <div className="field">
                        <label>Upload-Kanal <span className="field-hint">Offsite-Kopie in einen PRIVATEN Kanal — leer = nur lokal</span></label>
                        <div className="field-row">
                            <select
                                value={form.backup_channel_id ?? ''}
                                onChange={(e) => setForm({ ...form, backup_channel_id: e.target.value })}
                            >
                                <option value="">— nur lokal —</option>
                                {channelOptions}
                            </select>
                            <button className="btn" onClick={() => sendTest('backup')}>Backup jetzt</button>
                        </div>
                    </div>
                </div>

                {/* API-Keys */}
                <div className="settings-section">
                    <h2 className="settings-title">// API-Keys (/api/v1)</h2>

                    {keys.length > 0 && (
                        <div className="key-list">
                            {keys.map((k) => (
                                <div className="key-row" key={k.id}>
                                    <span className="key-name">{k.name}</span>
                                    <span className="key-scopes">{k.scopes}</span>
                                    <span className="key-used">
                                        {k.last_used_at ? `zuletzt: ${k.last_used_at.slice(0, 16)}` : 'nie benutzt'}
                                    </span>
                                    <button className="card-delete" title="Key widerrufen" onClick={() => revokeKey(k.id)}>✕</button>
                                </div>
                            ))}
                        </div>
                    )}

                    {createdKey && (
                        <div className="key-created">
                            <p>Key <strong>{createdKey.name}</strong> erstellt — <strong>jetzt kopieren</strong>, er wird nie wieder angezeigt:</p>
                            <code>{createdKey.key}</code>
                        </div>
                    )}

                    <div className="field">
                        <label>Neuer Key <span className="field-hint">Name des Skripts/Dienstes + Scopes</span></label>
                        <div className="field-row">
                            <input
                                type="text"
                                placeholder="z. B. devlog.py, platform, fivem"
                                value={newKeyName}
                                onChange={(e) => setNewKeyName(e.target.value)}
                            />
                            <button className="btn" onClick={createKey}>Erstellen</button>
                        </div>
                        <div className="scope-row">
                            {API_SCOPES.map((s) => (
                                <label className="scope-pick" key={s.id} title={s.hint}>
                                    <input
                                        type="checkbox"
                                        checked={newKeyScopes.includes(s.id)}
                                        onChange={(e) =>
                                            setNewKeyScopes(
                                                e.target.checked
                                                    ? [...newKeyScopes, s.id]
                                                    : newKeyScopes.filter((x) => x !== s.id)
                                            )
                                        }
                                    />
                                    {s.label}
                                </label>
                            ))}
                        </div>
                    </div>
                </div>

                {/* Commit-Feed */}
                <div className="settings-section">
                    <h2 className="settings-title">// Commit-Feed</h2>

                    <div className="field">
                        <label className="toggle">
                            <input
                                type="checkbox"
                                checked={form.commit_feed_enabled}
                                onChange={(e) => setForm({ ...form, commit_feed_enabled: e.target.checked })}
                            />
                            <span>Push-Embeds posten</span>
                            <span className="field-hint">aus = Commits werden weiter archiviert, nur nicht gepostet</span>
                        </label>
                    </div>

                    <div className="field">
                        <label>Branch-Filter <span className="field-hint">kommagetrennt, leer = alle Branches posten</span></label>
                        <input
                            type="text"
                            placeholder="z. B. main, release"
                            value={form.commit_branch_filter}
                            onChange={(e) => setForm({ ...form, commit_branch_filter: e.target.value })}
                        />
                    </div>

                    <div className="field">
                        <label>Ignorierte Repos <span className="field-hint">kommagetrennt, volle Namen — werden komplett übersprungen</span></label>
                        <input
                            type="text"
                            placeholder="z. B. D4rkst3r/ecobot"
                            value={form.ignored_repos}
                            onChange={(e) => setForm({ ...form, ignored_repos: e.target.value })}
                        />
                    </div>
                </div>

                <div className="settings-actions">
                    <button className="btn btn-save" onClick={save}>Speichern</button>
                    {feedback && <span className="feedback">{feedback}</span>}
                </div>
            </section>
        </>
    );
}