/** Shared request, configuration and session infrastructure. */
export const API_BASE_URL = ''
const REQUEST_TIMEOUT = 10000
const SESSION_KEY = 'aiFinanceSession'

const wait = (duration: number) => new Promise<void>((resolve) => {
	setTimeout(() => resolve(), duration)
})

export function saveSession(token: string, phone: string): void {
	uni.setStorageSync(SESSION_KEY, { token, phone, loggedInAt: Date.now() })
}

export function getSession(): UTSJSONObject | null {
	const value = uni.getStorageSync(SESSION_KEY)
	if (value == null || typeof value != 'object') return null
	return value as UTSJSONObject
}

export function isLoggedIn(): boolean {
	return getSession() != null
}

export function clearSession(): void {
	uni.removeStorageSync(SESSION_KEY)
}

const apiMessage = (error: any | null, fallback: string): string => {
	if (error == null) return fallback
	const text = error.toString()
	return text.length > 0 ? text : fallback
}

const requestJson = (path: string, method: RequestMethod, payload: UTSJSONObject): Promise<UTSJSONObject> => {
	return new Promise<UTSJSONObject>((resolve, reject) => {
		uni.request({
			url: API_BASE_URL + path,
			method,
			data: payload,
			timeout: REQUEST_TIMEOUT,
			success: (response) => {
				if (response.statusCode >= 200 && response.statusCode < 300) {
					if (response.data == null) resolve(new UTSJSONObject())
					else resolve(response.data as UTSJSONObject)
				} else {
					reject('请求失败（' + response.statusCode.toString() + '）')
				}
			},
			fail: (error) => {
				reject(apiMessage(error, '网络请求失败，请稍后重试'))
			}
		})
	})
}

export { apiMessage, requestJson, wait }