/**
 * 统一请求封装：baseURL、Bearer Token、业务 code 处理。
 * 接口地址统一从 .env 的 VITE_API_BASE_URL 读取（见 api/config.js）。
 */
import { getToken, logout } from '@/utils/auth.js'
import { resolveBaseURL, getBaseURL } from '@/api/config.js'

const BASE_URL = resolveBaseURL()

export { getBaseURL }

/**
 * @param {{ url: string, method?: string, data?: object, header?: object, silent?: boolean }} options
 * @returns {Promise<any>} 业务 data 字段（若无 data 则返回整包）
 */
export function request(options = {}) {
	const { url, method = 'GET', data, header = {}, silent = false, timeout = 30000 } = options
	const token = getToken()
	const headers = {
		'Content-Type': 'application/json',
		...header
	}
	if (token) {
		headers.Authorization = `Bearer ${token}`
	}

	const fullUrl = BASE_URL.replace(/\/$/, '') + url

	return new Promise((resolve, reject) => {
		uni.request({
			url: fullUrl,
			method: method.toUpperCase(),
			data: data || {},
			header: headers,
			timeout,
			success(res) {
				const status = res.statusCode
				const body = res.data || {}

				if (status === 401 || body.code === 401) {
					logout()
					if (!silent) {
						uni.showToast({ title: body.msg || '请重新登录', icon: 'none' })
					}
					setTimeout(() => {
						uni.reLaunch({ url: '/pages/login/login' })
					}, 400)
					reject(new Error(body.msg || '未授权'))
					return
				}

				if (status < 200 || status >= 300) {
					const msg = body.msg || `请求失败(${status})`
					if (!silent) uni.showToast({ title: msg, icon: 'none' })
					reject(new Error(msg))
					return
				}

				// 统一后端 { code, msg, data }
				if (typeof body.code !== 'undefined' && body.code !== 200) {
					const msg = body.msg || '操作失败'
					if (!silent) uni.showToast({ title: msg, icon: 'none' })
					const err = new Error(msg)
					err.code = body.code
					err.response = body
					reject(err)
					return
				}

				resolve(typeof body.data !== 'undefined' ? body.data : body)
			},
			fail(err) {
				const detail = (err && err.errMsg) || ''
				console.error('[request fail]', fullUrl, detail)
				if (!silent) {
					uni.showToast({
						title: detail.includes('timeout') ? '请求超时' : '网络异常，请检查接口地址',
						icon: 'none'
					})
				}
				reject(new Error(detail || '网络异常'))
			}
		})
	})
}

/** 返回完整响应体（含 code/msg），用于需要自行判断 code 的场景 */
export function requestRaw(options = {}) {
	const { url, method = 'GET', data, header = {} } = options
	const token = getToken()
	const headers = {
		'Content-Type': 'application/json',
		...header
	}
	if (token) {
		headers.Authorization = `Bearer ${token}`
	}

	const fullUrl = BASE_URL.replace(/\/$/, '') + url

	return new Promise((resolve, reject) => {
		uni.request({
			url: fullUrl,
			method: method.toUpperCase(),
			data: data || {},
			header: headers,
			timeout: 30000,
			success(res) {
				resolve(res.data || {})
			},
			fail(err) {
				console.error('[requestRaw fail]', fullUrl, err)
				reject(err)
			}
		})
	})
}

export function generateId() {
	return `${Date.now().toString(36)}${Math.random().toString(36).slice(2, 8)}`
}