import type {
	ApiEnvelope,
	ContainerStats,
	ContainerStatsSample,
	SystemStats,
	SystemStatsSample,
	TopContainerSample,
	Deploy,
	DeployLog,
	DockerHealth,
	ProxyHealth,
	EventLogEntry,
	EventLogStats,
	InspectResult,
	Instance,
	LocalImage,
	NpmCertificate,
	NpmAccessList,
	ProxyRoute,
	Project,
	ProjectDetail,
	Registry,
	RegistryImage,
	Settings,
	StaleContainer,
	Stage,
	StageEnv,
	Volume,
	VolumeScopeInfo,
	BrowseResult,
	DnsZone,
	DnsRecordView,
	BackupInfo
} from './types';

// ── Helpers ─────────────────────────────────────────────────────────

class ApiError extends Error {
	constructor(
		message: string,
		public readonly status: number
	) {
		super(message);
		this.name = 'ApiError';
	}
}

import { getAuthToken, clearAuth } from './auth';

// ── Concurrency limiter ────────────────────────────────────────────
// Chrome allows only 6 concurrent HTTP/1.1 connections per host.
// Reserve slots for the persistent SSE stream and health checks by
// capping regular API requests to 4 concurrent.
const MAX_CONCURRENT = 4;
let inflight = 0;
const queue: Array<() => void> = [];

function acquireSlot(signal?: AbortSignal | null): Promise<void> {
	if (inflight < MAX_CONCURRENT) {
		inflight++;
		return Promise.resolve();
	}
	return new Promise<void>((resolve, reject) => {
		// A queued waiter inherits the releasing request's slot, so it
		// must not increment `inflight` again — `releaseSlot` skips the
		// decrement when it hands the slot off, keeping the count stable.
		const entry = () => { resolve(); };
		queue.push(entry);

		signal?.addEventListener('abort', () => {
			const idx = queue.indexOf(entry);
			if (idx !== -1) {
				queue.splice(idx, 1);
				reject(signal.reason ?? new DOMException('Aborted', 'AbortError'));
			}
		}, { once: true });
	});
}

function releaseSlot(): void {
	const next = queue.shift();
	if (next) {
		next();
	} else {
		inflight--;
	}
}

async function request<T>(path: string, init?: RequestInit): Promise<T> {
	// Write operations (user-initiated) bypass the concurrency limiter
	// so they are never blocked behind background polling.
	const method = init?.method?.toUpperCase() ?? 'GET';
	if (method !== 'GET') {
		return requestInner<T>(path, init);
	}
	await acquireSlot(init?.signal);
	try {
		return await requestInner<T>(path, init);
	} finally {
		releaseSlot();
	}
}

async function requestInner<T>(path: string, init?: RequestInit): Promise<T> {
	const token = getAuthToken();
	const headers: Record<string, string> = {
		'Content-Type': 'application/json',
		...(init?.headers as Record<string, string>)
	};
	if (token) {
		headers['Authorization'] = `Bearer ${token}`;
	}

	const res = await fetch(path, {
		...init,
		headers
	});

	// Redirect to login on 401 (expired/missing token).
	if (res.status === 401 && typeof window !== 'undefined' && !path.includes('/auth/')) {
		clearAuth();
		window.location.href = '/login';
		throw new ApiError('Authentication required', 401);
	}

	let envelope: ApiEnvelope<T>;
	try {
		envelope = await res.json();
	} catch {
		throw new ApiError(
			`Server returned non-JSON response (HTTP ${res.status})`,
			res.status
		);
	}

	if (!envelope.success) {
		throw new ApiError(envelope.error ?? 'Unknown API error', res.status);
	}

	return envelope.data as T;
}

function get<T>(path: string, signal?: AbortSignal): Promise<T> {
	return request<T>(path, signal ? { signal } : undefined);
}

function post<T>(path: string, body?: unknown): Promise<T> {
	return request<T>(path, {
		method: 'POST',
		body: body !== undefined ? JSON.stringify(body) : undefined
	});
}

function put<T>(path: string, body: unknown): Promise<T> {
	return request<T>(path, {
		method: 'PUT',
		body: JSON.stringify(body)
	});
}

function del<T>(path: string): Promise<T> {
	return request<T>(path, { method: 'DELETE' });
}

// ── Projects ────────────────────────────────────────────────────────

export function listProjects(signal?: AbortSignal): Promise<Project[]> {
	return get<Project[]>('/api/projects', signal);
}

export function getProject(id: string, signal?: AbortSignal): Promise<ProjectDetail> {
	return get<ProjectDetail>(`/api/projects/${id}`, signal);
}

export function createProject(data: Partial<Project>): Promise<Project> {
	return post<Project>('/api/projects', data);
}

export function updateProject(id: string, data: Partial<Project>): Promise<Project> {
	return put<Project>(`/api/projects/${id}`, data);
}

export function deleteProject(id: string): Promise<{ deleted: string }> {
	return del<{ deleted: string }>(`/api/projects/${id}`);
}

// ── Stages ─────────────────────────────────────────────────────────

export function createStage(projectId: string, data: Partial<Stage>): Promise<Stage> {
	return post<Stage>(`/api/projects/${projectId}/stages`, data);
}

export function updateStage(projectId: string, stageId: string, data: Partial<Stage>): Promise<Stage> {
	return put<Stage>(`/api/projects/${projectId}/stages/${stageId}`, data);
}

export function deleteStage(projectId: string, stageId: string): Promise<void> {
	return del<void>(`/api/projects/${projectId}/stages/${stageId}`);
}

// ── Instances ───────────────────────────────────────────────────────

export function listInstances(projectId: string, stageId: string, signal?: AbortSignal): Promise<Instance[]> {
	return get<Instance[]>(`/api/projects/${projectId}/stages/${stageId}/instances`, signal);
}

export function deployInstance(
	projectId: string,
	stageId: string,
	imageTag: string
): Promise<{ status: string }> {
	return post<{ status: string }>(`/api/projects/${projectId}/stages/${stageId}/instances`, {
		image_tag: imageTag
	});
}

export function removeInstance(
	projectId: string,
	stageId: string,
	instanceId: string
): Promise<{ deleted: string }> {
	return del<{ deleted: string }>(
		`/api/projects/${projectId}/stages/${stageId}/instances/${instanceId}`
	);
}

export function stopInstance(
	projectId: string,
	stageId: string,
	instanceId: string
): Promise<{ status: string }> {
	return post<{ status: string }>(
		`/api/projects/${projectId}/stages/${stageId}/instances/${instanceId}/stop`
	);
}

export function startInstance(
	projectId: string,
	stageId: string,
	instanceId: string
): Promise<{ status: string }> {
	return post<{ status: string }>(
		`/api/projects/${projectId}/stages/${stageId}/instances/${instanceId}/start`
	);
}

export function restartInstance(
	projectId: string,
	stageId: string,
	instanceId: string
): Promise<{ status: string }> {
	return post<{ status: string }>(
		`/api/projects/${projectId}/stages/${stageId}/instances/${instanceId}/restart`
	);
}

// ── Deploys ─────────────────────────────────────────────────────────

export function listDeploys(limit = 50, signal?: AbortSignal): Promise<Deploy[]> {
	return get<Deploy[]>(`/api/deploys?limit=${limit}`, signal);
}

export function getDeployLogs(deployId: string): Promise<DeployLog[]> {
	return get<DeployLog[]>(`/api/deploys/${deployId}/logs`);
}

export function inspectImage(image: string): Promise<InspectResult> {
	return post<InspectResult>('/api/deploy/inspect', { image });
}

export function quickDeploy(data: {
	name?: string;
	image: string;
	tag?: string;
	registry?: string;
	port?: number;
	force?: boolean;
	enable_proxy?: boolean;
	auto_deploy?: boolean;
}): Promise<{ project: Project; status: string }> {
	return post<{ project: Project; status: string }>('/api/deploy/quick', data);
}

// ── Registries ──────────────────────────────────────────────────────

export function listRegistries(): Promise<Registry[]> {
	return get<Registry[]>('/api/registries');
}

export function createRegistry(data: Partial<Registry>): Promise<Registry> {
	return post<Registry>('/api/registries', data);
}

export function updateRegistry(id: string, data: Partial<Registry>): Promise<Registry> {
	return put<Registry>(`/api/registries/${id}`, data);
}

export function deleteRegistry(id: string): Promise<{ deleted: string }> {
	return del<{ deleted: string }>(`/api/registries/${id}`);
}

export function testRegistry(id: string): Promise<{ status: string }> {
	return post<{ status: string }>(`/api/registries/${id}/test`);
}

export function listRegistryTags(registryId: string, image: string): Promise<string[]> {
	// Image contains slashes (e.g. "owner/name") — don't encode them;
	// the backend route uses a wildcard (/tags/*) that expects path segments.
	return get<string[]>(`/api/registries/${registryId}/tags/${image}`);
}

export function listRegistryImages(registryId: string): Promise<RegistryImage[]> {
	return get<RegistryImage[]>(`/api/registries/${registryId}/images`);
}

// ── Settings ────────────────────────────────────────────────────────

export function getSettings(signal?: AbortSignal): Promise<Settings> {
	return get<Settings>('/api/settings', signal);
}

export function updateSettings(data: Partial<Settings>): Promise<Settings> {
	return put<Settings>('/api/settings', data);
}

// ── Webhooks ───────────────────────────────────────────────────────

export interface WebhookUrlResponse {
	webhook_url: string;
	webhook_secret: string;
}

export function getProjectWebhook(projectId: string): Promise<WebhookUrlResponse> {
	return get<WebhookUrlResponse>(`/api/projects/${projectId}/webhook`);
}

export function regenerateProjectWebhook(projectId: string): Promise<WebhookUrlResponse> {
	return post<WebhookUrlResponse>(`/api/projects/${projectId}/webhook/regenerate`);
}

export function getStaticSiteWebhook(siteId: string): Promise<WebhookUrlResponse> {
	return get<WebhookUrlResponse>(`/api/sites/${siteId}/webhook`);
}

export function regenerateStaticSiteWebhook(siteId: string): Promise<WebhookUrlResponse> {
	return post<WebhookUrlResponse>(`/api/sites/${siteId}/webhook/regenerate`);
}

// ── Outgoing-webhook signing & test ────────────────────────────────

export interface NotificationSecretResponse {
	secret: string;
	has_secret: boolean;
}

export interface NotificationTestResult {
	url: string;
	tier: 'settings' | 'project' | 'stage' | 'site';
	status_code: number;
	latency_ms: number;
	signature_sent: boolean;
	delivery_id: string;
	response_snippet: string;
	error?: string;
}

// Settings (global) tier.
export function getSettingsNotificationSecret(): Promise<NotificationSecretResponse> {
	return get<NotificationSecretResponse>('/api/settings/notification-secret');
}
export function regenerateSettingsNotificationSecret(): Promise<NotificationSecretResponse> {
	return post<NotificationSecretResponse>('/api/settings/notification-secret/regenerate');
}
export function disableSettingsNotificationSigning(): Promise<NotificationSecretResponse> {
	return post<NotificationSecretResponse>('/api/settings/notification-secret/disable');
}
export function testSettingsNotification(): Promise<NotificationTestResult> {
	return post<NotificationTestResult>('/api/settings/notification-test');
}

// Project tier.
export function getProjectNotificationSecret(projectId: string): Promise<NotificationSecretResponse> {
	return get<NotificationSecretResponse>(`/api/projects/${projectId}/notification-secret`);
}
export function regenerateProjectNotificationSecret(projectId: string): Promise<NotificationSecretResponse> {
	return post<NotificationSecretResponse>(`/api/projects/${projectId}/notification-secret/regenerate`);
}
export function disableProjectNotificationSigning(projectId: string): Promise<NotificationSecretResponse> {
	return post<NotificationSecretResponse>(`/api/projects/${projectId}/notification-secret/disable`);
}
export function testProjectNotification(projectId: string): Promise<NotificationTestResult> {
	return post<NotificationTestResult>(`/api/projects/${projectId}/notification-test`);
}

// Stage tier.
export function getStageNotificationSecret(projectId: string, stageId: string): Promise<NotificationSecretResponse> {
	return get<NotificationSecretResponse>(`/api/projects/${projectId}/stages/${stageId}/notification-secret`);
}
export function regenerateStageNotificationSecret(projectId: string, stageId: string): Promise<NotificationSecretResponse> {
	return post<NotificationSecretResponse>(`/api/projects/${projectId}/stages/${stageId}/notification-secret/regenerate`);
}
export function disableStageNotificationSigning(projectId: string, stageId: string): Promise<NotificationSecretResponse> {
	return post<NotificationSecretResponse>(`/api/projects/${projectId}/stages/${stageId}/notification-secret/disable`);
}
export function testStageNotification(projectId: string, stageId: string): Promise<NotificationTestResult> {
	return post<NotificationTestResult>(`/api/projects/${projectId}/stages/${stageId}/notification-test`);
}

// Static-site tier.
export function getStaticSiteNotificationSecret(siteId: string): Promise<NotificationSecretResponse> {
	return get<NotificationSecretResponse>(`/api/sites/${siteId}/notification-secret`);
}
export function regenerateStaticSiteNotificationSecret(siteId: string): Promise<NotificationSecretResponse> {
	return post<NotificationSecretResponse>(`/api/sites/${siteId}/notification-secret/regenerate`);
}
export function disableStaticSiteNotificationSigning(siteId: string): Promise<NotificationSecretResponse> {
	return post<NotificationSecretResponse>(`/api/sites/${siteId}/notification-secret/disable`);
}
export function testStaticSiteNotification(siteId: string): Promise<NotificationTestResult> {
	return post<NotificationTestResult>(`/api/sites/${siteId}/notification-test`);
}

// ── Proxy Routes ───────────────────────────────────────────────────

export function listProxyRoutes(): Promise<ProxyRoute[]> {
	return get<ProxyRoute[]>('/api/proxies');
}

// ── Docker Management ──────────────────────────────────────────────

export function fetchContainerLogs(
	projectId: string, stageId: string, instanceId: string, tail = 200
): Promise<string[]> {
	return get<string[]>(`/api/projects/${projectId}/stages/${stageId}/instances/${instanceId}/logs?tail=${tail}`);
}

export function listProjectImages(projectId: string, signal?: AbortSignal): Promise<LocalImage[]> {
	return get<LocalImage[]>(`/api/projects/${projectId}/images`, signal);
}

export function getUnusedImageStats(signal?: AbortSignal): Promise<{
	total_size_mb: number; count: number; threshold_mb: number; exceeded: boolean;
}> {
	return get<{ total_size_mb: number; count: number; threshold_mb: number; exceeded: boolean }>('/api/docker/unused-images', signal);
}

export function pruneImages(): Promise<{ images_removed: number; space_reclaimed_mb: number }> {
	return post<{ images_removed: number; space_reclaimed_mb: number }>('/api/docker/prune-images');
}

export function testNpmConnection(data: { npm_url?: string; npm_email?: string; npm_password?: string }): Promise<{ status: string }> {
	return post<{ status: string }>('/api/settings/npm/test', data);
}

export function listNpmCertificates(): Promise<NpmCertificate[]> {
	return get<NpmCertificate[]>('/api/settings/npm-certificates');
}

export function listNpmAccessLists(): Promise<NpmAccessList[]> {
	return get<NpmAccessList[]>('/api/settings/npm-access-lists');
}

// ── DNS ────────────────────────────────────────────────────────────

export function testDnsConnection(provider: string, token: string, zoneId: string): Promise<{ success: boolean; error?: string }> {
	return post<{ success: boolean; error?: string }>('/api/settings/dns/test', { provider, token, zone_id: zoneId });
}

export function listDnsZones(token?: string): Promise<DnsZone[]> {
	return post<DnsZone[]>('/api/settings/dns/zones', { token: token ?? '' });
}

export function getDnsRecords(): Promise<DnsRecordView[]> {
	return get<DnsRecordView[]>('/api/dns/records');
}

export function syncDnsRecords(): Promise<{ created: number; deleted: number; already_synced: number }> {
	return post<{ created: number; deleted: number; already_synced: number }>('/api/dns/sync');
}

export function deleteDnsRecord(fqdn: string): Promise<void> {
	return del<void>(`/api/dns/records/${encodeURIComponent(fqdn)}`);
}

// ── Backups ────────────────────────────────────────────────────────

export function listBackups(): Promise<BackupInfo[]> {
	return get<BackupInfo[]>('/api/backups');
}

export function triggerBackup(): Promise<BackupInfo> {
	return post<BackupInfo>('/api/backups');
}

export function deleteBackup(id: string): Promise<void> {
	return del<void>(`/api/backups/${id}`);
}

export function restoreBackup(id: string): Promise<{ status: string; message: string }> {
	return post<{ status: string; message: string }>(`/api/backups/${id}/restore`);
}

export function backupDownloadUrl(id: string): string {
	return `/api/backups/${id}/download`;
}

// ── Health ──────────────────────────────────────────────────────────

export function getHealth(): Promise<{ docker: DockerHealth; proxy?: ProxyHealth }> {
	return get<{ docker: DockerHealth; proxy?: ProxyHealth }>('/api/health');
}

// ── Auth ─────────────────────────────────────────────────────────────

export function login(username: string, password: string): Promise<{ token: string; expires_at: string }> {
	return post<{ token: string; expires_at: string }>('/api/auth/login', { username, password });
}

export function getCurrentUser(): Promise<{ id: string; username: string; email: string; role: string }> {
	return get<{ id: string; username: string; email: string; role: string }>('/api/auth/me');
}

// Auth settings
export async function getAuthSettings(): Promise<any> {
	return request<any>('/api/auth/settings');
}

export async function updateAuthSettings(settings: any): Promise<any> {
	return request<any>('/api/auth/settings', {
		method: 'PUT',
		body: JSON.stringify(settings)
	});
}

export async function listUsers(): Promise<any[]> {
	return request<any[]>('/api/auth/users');
}

export async function createUser(data: { username: string; password: string; email?: string; role?: string }): Promise<any> {
	return request<any>('/api/auth/users', {
		method: 'POST',
		body: JSON.stringify(data)
	});
}

export async function updateUser(uid: string, data: { email?: string; role?: string }): Promise<any> {
	return request<any>(`/api/auth/users/${uid}`, {
		method: 'PUT',
		body: JSON.stringify(data)
	});
}

export async function changeUserPassword(uid: string, password: string): Promise<any> {
	return request<any>(`/api/auth/users/${uid}/password`, {
		method: 'PUT',
		body: JSON.stringify({ password })
	});
}

export async function deleteUser(uid: string): Promise<any> {
	return request<any>(`/api/auth/users/${uid}`, { method: 'DELETE' });
}

export async function logout(): Promise<void> {
	await request<any>('/api/auth/logout', { method: 'POST' });
}

// ── Config Export ────────────────────────────────────────────────────

export function exportConfigUrl(): string {
	return '/api/config/export';
}

// ── Stage Env Overrides ──────────────────────────────────────────────

export function listStageEnv(projectId: string, stageId: string): Promise<StageEnv[]> {
	return get<StageEnv[]>(`/api/projects/${projectId}/stages/${stageId}/env`);
}

export function createStageEnv(
	projectId: string,
	stageId: string,
	data: { key: string; value: string; encrypted?: boolean }
): Promise<StageEnv> {
	return post<StageEnv>(`/api/projects/${projectId}/stages/${stageId}/env`, data);
}

export function updateStageEnv(
	projectId: string,
	stageId: string,
	envId: string,
	data: { key?: string; value?: string; encrypted?: boolean }
): Promise<StageEnv> {
	return put<StageEnv>(`/api/projects/${projectId}/stages/${stageId}/env/${envId}`, data);
}

export function deleteStageEnv(
	projectId: string,
	stageId: string,
	envId: string
): Promise<{ deleted: string }> {
	return del<{ deleted: string }>(`/api/projects/${projectId}/stages/${stageId}/env/${envId}`);
}

// ── Volumes ──────────────────────────────────────────────────────────

export function listVolumes(projectId: string): Promise<Volume[]> {
	return get<Volume[]>(`/api/projects/${projectId}/volumes`);
}

export function createVolume(
	projectId: string,
	data: { source: string; target: string; scope: string; name?: string; mode?: string }
): Promise<Volume> {
	return post<Volume>(`/api/projects/${projectId}/volumes`, data);
}

export function updateVolume(
	projectId: string,
	volId: string,
	data: { source?: string; target?: string; scope?: string; name?: string; mode?: string }
): Promise<Volume> {
	return put<Volume>(`/api/projects/${projectId}/volumes/${volId}`, data);
}

export function listVolumeScopes(): Promise<VolumeScopeInfo[]> {
	return get<VolumeScopeInfo[]>('/api/volumes/scopes');
}

export function deleteVolume(
	projectId: string,
	volId: string
): Promise<{ deleted: string }> {
	return del<{ deleted: string }>(`/api/projects/${projectId}/volumes/${volId}`);
}

export function browseVolume(
	projectId: string,
	volId: string,
	params?: { path?: string; stage?: string; tag?: string }
): Promise<BrowseResult> {
	const query = new URLSearchParams();
	if (params?.path) query.set('path', params.path);
	if (params?.stage) query.set('stage', params.stage);
	if (params?.tag) query.set('tag', params.tag);
	const qs = query.toString();
	return get<BrowseResult>(`/api/projects/${projectId}/volumes/${volId}/browse${qs ? `?${qs}` : ''}`);
}

export function volumeDownloadUrl(
	projectId: string,
	volId: string,
	params?: { path?: string; stage?: string; tag?: string }
): string {
	const query = new URLSearchParams();
	if (params?.path) query.set('path', params.path);
	if (params?.stage) query.set('stage', params.stage);
	if (params?.tag) query.set('tag', params.tag);
	const token = typeof localStorage !== 'undefined' ? localStorage.getItem('auth_token') : null;
	if (token) query.set('token', token);
	const qs = query.toString();
	return `/api/projects/${projectId}/volumes/${volId}/download${qs ? `?${qs}` : ''}`;
}

export async function uploadToVolume(
	projectId: string,
	volId: string,
	files: FileList,
	params?: { path?: string; stage?: string; tag?: string }
): Promise<{ uploaded: string[]; count: number }> {
	const query = new URLSearchParams();
	if (params?.path) query.set('path', params.path);
	if (params?.stage) query.set('stage', params.stage);
	if (params?.tag) query.set('tag', params.tag);
	const qs = query.toString();

	const formData = new FormData();
	for (let i = 0; i < files.length; i++) {
		formData.append('files', files[i]);
	}

	const token = typeof localStorage !== 'undefined' ? localStorage.getItem('auth_token') : null;
	const headers: Record<string, string> = {};
	if (token) headers['Authorization'] = `Bearer ${token}`;

	const res = await fetch(`/api/projects/${projectId}/volumes/${volId}/upload${qs ? `?${qs}` : ''}`, {
		method: 'POST',
		headers,
		body: formData,
	});

	const envelope = await res.json();
	if (!envelope.success) throw new Error(envelope.error ?? 'Upload failed');
	return envelope.data;
}

// ── Event Log ───────────────────────────────────────────────────────

export function fetchEventLog(params?: {
	severity?: string;
	source?: string;
	since?: string;
	until?: string;
	limit?: number;
	offset?: number;
}): Promise<EventLogEntry[]> {
	const query = new URLSearchParams();
	if (params?.severity) query.set('severity', params.severity);
	if (params?.source) query.set('source', params.source);
	if (params?.since) query.set('since', params.since);
	if (params?.until) query.set('until', params.until);
	if (params?.limit) query.set('limit', String(params.limit));
	if (params?.offset) query.set('offset', String(params.offset));
	const qs = query.toString();
	return get<EventLogEntry[]>(`/api/events/log${qs ? `?${qs}` : ''}`);
}

export function fetchEventLogStats(): Promise<EventLogStats> {
	return get<EventLogStats>('/api/events/log/stats');
}

export function deleteEvent(id: number): Promise<{ status: string }> {
	return del<{ status: string }>(`/api/events/log/${id}`);
}

export function clearAllEvents(): Promise<{ status: string; count: number }> {
	return del<{ status: string; count: number }>('/api/events/log');
}

// ── Stale Containers ────────────────────────────────────────────────

export function fetchStaleContainers(signal?: AbortSignal): Promise<StaleContainer[]> {
	return get<StaleContainer[]>('/api/containers/stale', signal);
}

export function cleanupStaleContainer(id: string): Promise<{ deleted: string }> {
	return post<{ deleted: string }>(`/api/containers/stale/${id}/cleanup`);
}

export function bulkCleanupStaleContainers(): Promise<{ deleted: number }> {
	return post<{ deleted: number }>('/api/containers/stale/cleanup');
}

// ── Container Stats ────────────────────────────────────────────────

export function fetchContainerStats(
	projectId: string,
	stageId: string,
	instanceId: string,
	signal?: AbortSignal
): Promise<ContainerStats> {
	return get<ContainerStats>(
		`/api/projects/${projectId}/stages/${stageId}/instances/${instanceId}/stats`,
		signal
	);
}

export function fetchInstanceStatsHistory(
	projectId: string,
	stageId: string,
	instanceId: string,
	window = '2h',
	signal?: AbortSignal
): Promise<ContainerStatsSample[]> {
	return get<ContainerStatsSample[]>(
		`/api/projects/${projectId}/stages/${stageId}/instances/${instanceId}/stats/history?window=${encodeURIComponent(window)}`,
		signal
	);
}

export function fetchSystemStats(signal?: AbortSignal): Promise<SystemStats> {
	return get<SystemStats>('/api/system/stats', signal);
}

export function fetchSystemStatsHistory(
	window = '2h',
	signal?: AbortSignal
): Promise<SystemStatsSample[]> {
	return get<SystemStatsSample[]>(`/api/system/stats/history?window=${encodeURIComponent(window)}`, signal);
}

export function fetchTopContainers(
	by: 'cpu' | 'memory' = 'cpu',
	limit = 5,
	signal?: AbortSignal
): Promise<TopContainerSample[]> {
	return get<TopContainerSample[]>(`/api/system/stats/top?by=${by}&limit=${limit}`, signal);
}

export function fetchStaticSiteStats(id: string, signal?: AbortSignal): Promise<ContainerStats> {
	return get<ContainerStats>(`/api/sites/${id}/stats`, signal);
}

export function fetchStaticSiteStatsHistory(
	id: string,
	window = '2h',
	signal?: AbortSignal
): Promise<ContainerStatsSample[]> {
	return get<ContainerStatsSample[]>(
		`/api/sites/${id}/stats/history?window=${encodeURIComponent(window)}`,
		signal
	);
}

export async function fetchStaticSiteLogs(id: string, tail = 200): Promise<string[]> {
	const result = await get<string[] | null>(`/api/sites/${id}/logs?tail=${tail}`);
	return result ?? [];
}

// ── Static Sites ──────────────────────────────────────────────────────

import type { StaticSite, StaticSiteSecret, FolderEntry, GitProvider, RepoInfo } from './types';

export function listStaticSites(signal?: AbortSignal): Promise<StaticSite[]> {
	return get<StaticSite[]>('/api/sites', signal);
}

export function getStaticSite(id: string): Promise<StaticSite> {
	return get<StaticSite>(`/api/sites/${id}`);
}

export function createStaticSite(data: Partial<StaticSite>): Promise<StaticSite> {
	return post<StaticSite>('/api/sites', data);
}

export function updateStaticSite(id: string, data: Partial<StaticSite>): Promise<StaticSite> {
	return put<StaticSite>(`/api/sites/${id}`, data);
}

export function deleteStaticSite(id: string): Promise<{ deleted: string }> {
	return del<{ deleted: string }>(`/api/sites/${id}`);
}

export function deployStaticSite(id: string): Promise<{ status: string }> {
	return post<{ status: string }>(`/api/sites/${id}/deploy`);
}

export function stopStaticSite(id: string): Promise<{ status: string }> {
	return post<{ status: string }>(`/api/sites/${id}/stop`);
}

export function startStaticSite(id: string): Promise<{ status: string }> {
	return post<{ status: string }>(`/api/sites/${id}/start`);
}

export function listStaticSiteRepos(data: {
	provider?: string;
	gitea_url: string;
	access_token?: string;
	query?: string;
}): Promise<RepoInfo[]> {
	return post<RepoInfo[]>('/api/sites/repos', data);
}

export function detectStaticSiteProvider(url: string): Promise<{ provider: GitProvider }> {
	return post<{ provider: GitProvider }>('/api/sites/detect-provider', { url });
}

export function testStaticSiteConnection(data: {
	provider?: string;
	gitea_url: string;
	access_token?: string;
	repo_owner: string;
	repo_name: string;
}): Promise<{ status: string }> {
	return post<{ status: string }>('/api/sites/test-connection', data);
}

export function listStaticSiteBranches(data: {
	provider?: string;
	gitea_url: string;
	access_token?: string;
	repo_owner: string;
	repo_name: string;
}): Promise<string[]> {
	return post<string[]>('/api/sites/branches', data);
}

export function listStaticSiteTree(data: {
	provider?: string;
	gitea_url: string;
	access_token?: string;
	repo_owner: string;
	repo_name: string;
	branch: string;
}): Promise<FolderEntry[]> {
	return post<FolderEntry[]>('/api/sites/tree', data);
}

export function listStaticSiteSecrets(siteId: string): Promise<StaticSiteSecret[]> {
	return get<StaticSiteSecret[]>(`/api/sites/${siteId}/secrets`);
}

export function createStaticSiteSecret(
	siteId: string,
	data: { key: string; value: string; encrypted?: boolean }
): Promise<StaticSiteSecret> {
	return post<StaticSiteSecret>(`/api/sites/${siteId}/secrets`, data);
}

export function updateStaticSiteSecret(
	siteId: string,
	secretId: string,
	data: { key?: string; value?: string; encrypted?: boolean }
): Promise<StaticSiteSecret> {
	return put<StaticSiteSecret>(`/api/sites/${siteId}/secrets/${secretId}`, data);
}

export function deleteStaticSiteSecret(
	siteId: string,
	secretId: string
): Promise<{ deleted: string }> {
	return del<{ deleted: string }>(`/api/sites/${siteId}/secrets/${secretId}`);
}

export function getStaticSiteStorage(
	siteId: string
): Promise<import('./types').StaticSiteStorageUsage> {
	return get<import('./types').StaticSiteStorageUsage>(`/api/sites/${siteId}/storage`);
}

// ── Stacks (docker-compose) ─────────────────────────────────────────

import type { Stack, StackRevision, StackService } from './types';

export function listStacks(signal?: AbortSignal): Promise<Stack[]> {
	return get<Stack[]>('/api/stacks', signal);
}

export function getStack(id: string, signal?: AbortSignal): Promise<Stack> {
	return get<Stack>(`/api/stacks/${id}`, signal);
}

export function createStack(data: {
	name: string;
	description?: string;
	yaml: string;
	deploy?: boolean;
}): Promise<{ stack: Stack; revision: StackRevision }> {
	return post<{ stack: Stack; revision: StackRevision }>('/api/stacks', data);
}

export function updateStack(id: string, data: { name?: string; description?: string }): Promise<Stack> {
	return put<Stack>(`/api/stacks/${id}`, data);
}

export function deleteStack(id: string, removeVolumes = false): Promise<{ deleted: string }> {
	const qs = removeVolumes ? '?remove_volumes=true' : '';
	return del<{ deleted: string }>(`/api/stacks/${id}${qs}`);
}

export function listStackRevisions(id: string, signal?: AbortSignal): Promise<StackRevision[]> {
	return get<StackRevision[]>(`/api/stacks/${id}/revisions`, signal);
}

export function getStackRevision(id: string, revId: string): Promise<StackRevision> {
	return get<StackRevision>(`/api/stacks/${id}/revisions/${revId}`);
}

export function createStackRevision(id: string, yaml: string): Promise<StackRevision> {
	return post<StackRevision>(`/api/stacks/${id}/revisions`, { yaml });
}

export function rollbackStack(id: string, revId: string): Promise<StackRevision> {
	return post<StackRevision>(`/api/stacks/${id}/rollback/${revId}`);
}

export function stopStack(id: string): Promise<{ status: string }> {
	return post<{ status: string }>(`/api/stacks/${id}/stop`);
}

export function startStack(id: string): Promise<{ status: string }> {
	return post<{ status: string }>(`/api/stacks/${id}/start`);
}

export function getStackServices(id: string, signal?: AbortSignal): Promise<StackService[]> {
	return get<StackService[]>(`/api/stacks/${id}/services`, signal);
}

export async function getStackLogs(
	id: string,
	service?: string,
	tail = 200
): Promise<string> {
	const params = new URLSearchParams();
	if (service) params.set('service', service);
	params.set('tail', String(tail));
	const token = getAuthToken();
	const headers: Record<string, string> = {};
	if (token) headers['Authorization'] = `Bearer ${token}`;
	const res = await fetch(`/api/stacks/${id}/logs?${params.toString()}`, { headers });
	if (!res.ok) {
		throw new ApiError(`Failed to fetch logs: ${res.status}`, res.status);
	}
	return res.text();
}

export { ApiError };