/**
 * Creator Studio 的 REST 访问层。
 *
 * 所有请求都带 `X-WP-Nonce`；服务端仍以 Jio 能力矩阵与文章归属做最终判定。
 *
 * @package Jio
 */

export type ApiError = Error & { status?: number; code?: string; data?: unknown };

function toError(payload: any, status: number): ApiError {
	const message =
		(payload && (payload.message || payload.error)) ||
		(status === 401
			? '登录状态已失效，请刷新页面重新登录。'
			: '请求失败，请稍后重试。');
	const error = new Error(String(message)) as ApiError;
	error.status = status;
	error.code = payload && payload.code ? String(payload.code) : '';
	error.data = payload;
	return error;
}

async function readJson(response: Response): Promise<any> {
	try {
		return await response.json();
	} catch (error) {
		return null;
	}
}

export async function apiGet(url: string, nonce: string): Promise<any> {
	const response = await fetch(url, {
		credentials: 'same-origin',
		headers: { 'X-WP-Nonce': nonce },
	});
	const payload = await readJson(response);
	if (!response.ok) {
		throw toError(payload, response.status);
	}
	return payload;
}

export async function apiPost(url: string, body: Record<string, unknown>, nonce: string): Promise<any> {
	const response = await fetch(url, {
		method: 'POST',
		credentials: 'same-origin',
		headers: {
			'Content-Type': 'application/json',
			'X-WP-Nonce': nonce,
		},
		body: JSON.stringify(body),
	});
	const payload = await readJson(response);
	if (!response.ok) {
		throw toError(payload, response.status);
	}
	return payload;
}

export async function apiUpload(url: string, file: File, nonce: string, fields: Record<string, string> = {}): Promise<any> {
	const body = new FormData();
	body.append('file', file);
	Object.entries(fields).forEach(([key, value]) => body.append(key, value));

	const response = await fetch(url, {
		method: 'POST',
		credentials: 'same-origin',
		headers: { 'X-WP-Nonce': nonce },
		body,
	});
	const payload = await readJson(response);
	if (!response.ok) {
		throw toError(payload, response.status);
	}
	return payload;
}

export const wpJson = (value: unknown): string => JSON.stringify(value);