/**
 * Admin > AI > Providers
 */
const { html } = window;
const { useState, useEffect, useCallback } = hooks;

export default function ProvidersSection() {
    const [configs, setConfigs] = useState([]);
    const [providerTypes, setProviderTypes] = useState([]);
    const [loading, setLoading] = useState(true);
    const [editing, setEditing] = useState(null); // null | 'new' | config object

    const load = useCallback(async () => {
        try {
            const [c, t] = await Promise.all([
                sw.api.admin.configs.list(),
                sw.api.admin.providers.types(),
            ]);
            setConfigs(c || []);
            setProviderTypes(t || []);
        } catch (e) { sw.toast(e.message, 'error'); }
        finally { setLoading(false); }
    }, []);

    useEffect(() => { load(); }, []);

    async function saveProvider(e) {
        e.preventDefault();
        const form = e.target;
        const data = {
            name: form.pname.value.trim(),
            provider: form.provider.value,
            endpoint: form.endpoint.value.trim(),
            api_key: form.api_key.value || undefined,
            is_private: form.is_private.checked,
        };
        try {
            if (editing === 'new') {
                await sw.api.admin.configs.create(data);
                sw.toast('Provider created', 'success');
            } else {
                await sw.api.admin.configs.update(editing.id, data);
                sw.toast('Provider updated', 'success');
            }
            setEditing(null);
            load();
        } catch (e) { sw.toast(e.message, 'error'); }
    }

    async function syncModels(id) {
        try {
            const result = await sw.api.admin.models.fetch();
            sw.toast(`Synced: ${result.added || 0} added, ${result.updated || 0} updated`, 'success');
        } catch (e) { sw.toast(e.message, 'error'); }
    }

    async function testProvider(cfg) {
        sw.toast(`Testing ${cfg.name}\u2026`, 'info');
        try {
            const result = await sw.api.admin.models.fetch();
            sw.toast(`${cfg.name}: connection OK`, 'success');
        } catch (e) {
            sw.toast(`${cfg.name}: connection failed \u2014 ${e.message}`, 'error');
        }
    }

    async function deleteProvider(id) {
        const ok = await sw.confirm('Delete this provider config?', true);
        if (!ok) return;
        try {
            await sw.api.admin.configs.del(id);
            sw.toast('Provider deleted', 'success');
            load();
        } catch (e) { sw.toast(e.message, 'error'); }
    }

    if (loading) return html`<div class="settings-placeholder">Loading\u2026</div>`;

    return html`
        <div>
            <div style="display:flex;align-items:center;gap:8px;margin-bottom:12px;">
                <div style="flex:1"></div>
                <button class="btn-md btn-primary" onClick=${() => setEditing('new')}>+ Add</button>
            </div>

            ${editing && html`
                <form class="admin-inline-form" style="margin-bottom:16px;padding:12px;border:1px solid var(--border);border-radius:var(--radius);" onSubmit=${saveProvider}>
                    <h4 style="margin:0 0 12px;">${editing === 'new' ? 'Add Provider' : 'Edit Provider'}</h4>
                    <div class="form-row">
                        <div class="form-group"><label>Name</label>
                            <input name="pname" placeholder="My OpenAI" value=${editing !== 'new' ? editing.name || '' : ''} />
                        </div>
                        <div class="form-group"><label>Type</label>
                            <select name="provider">
                                ${providerTypes.map(t => html`<option key=${t.id} value=${t.id} selected=${editing !== 'new' && editing.provider === t.id}>${t.display_name || t.name}</option>`)}
                            </select>
                        </div>
                    </div>
                    <div class="form-row">
                        <div class="form-group" style="flex:2;"><label>Endpoint</label>
                            <input name="endpoint" placeholder="https://api.openai.com/v1" value=${editing !== 'new' ? editing.endpoint || '' : ''} />
                        </div>
                        <div class="form-group" style="flex:1;"><label>API Key</label>
                            <input name="api_key" type="password" placeholder="${editing !== 'new' ? '(unchanged)' : 'sk-...'}" autocomplete="off" />
                        </div>
                    </div>
                    <label class="toggle-label" style="margin:8px 0;">
                        <input type="checkbox" name="is_private" checked=${editing !== 'new' && editing.is_private} />
                        <span class="toggle-track"></span>
                        <span>Private (admin personas only)</span>
                    </label>
                    <div class="form-row" style="margin-top:12px;gap:8px;">
                        <button type="submit" class="btn-small btn-primary">${editing === 'new' ? 'Create' : 'Save'}</button>
                        <button type="button" class="btn-small" onClick=${() => setEditing(null)}>Cancel</button>
                    </div>
                </form>
            `}

            <div class="provider-cards">
                ${configs.length === 0 && html`<div class="empty-hint">No provider configs</div>`}
                ${configs.map(c => html`
                    <div class="provider-card" key=${c.id}>
                        <div style="display:flex;align-items:center;gap:8px;margin-bottom:8px;">
                            <strong>${c.name}</strong>
                            <span class="badge">${c.provider}</span>
                            ${c.is_private && html`<span class="badge badge-inactive">private</span>`}
                            ${c.has_key ? html`<span class="badge badge-active">key set</span>` : html`<span class="badge badge-pending">no key</span>`}
                        </div>
                        <div class="text-muted" style="font-size:12px;margin-bottom:8px;word-break:break-all;">${c.endpoint || '(default)'}</div>
                        <div style="display:flex;gap:6px;">
                            <button class="btn-small" onClick=${() => testProvider(c)}>Test</button>
                            <button class="btn-small" onClick=${() => setEditing(c)}>Edit</button>
                            <button class="btn-small" onClick=${() => syncModels(c.id)}>Sync Models</button>
                            <button class="btn-small btn-danger" onClick=${() => deleteProvider(c.id)}>Delete</button>
                        </div>
                    </div>
                `)}
            </div>
        </div>
    `;
}