import config from '../config.js'
import storage from './storage.js'

let isRefreshing = false
let refreshSubscribers = []

const subscribeTokenRefresh = (callback) => {
	refreshSubscribers.push(callback)
}

const onTokenRefreshed = (token) => {
	refreshSubscribers.forEach(callback => callback(token))
	refreshSubscribers = []
}

const request = (options) => {
	return new Promise((resolve, reject) => {
		const fullUrl = config.baseUrl + options.url
		console.log('=== 请求开始 ===')
		console.log('URL:', fullUrl)
		console.log('Method:', options.method || 'GET')
		console.log('Data:', options.data)
		
		const token = storage.getToken()
		const { noAuthModal = false } = options
		
		uni.request({
			url: fullUrl,
			method: options.method || 'GET',
			data: options.data || {},
			header: {
				'Content-Type': 'application/json',
				...(token ? { 'Authorization': `Bearer ${token}` } : {}),
				...options.header
			},
			timeout: config.timeout,
			success: async (res) => {
				console.log('=== 请求成功 ===')
				console.log('StatusCode:', res.statusCode)
				console.log('Response:', res.data)
				
				const { statusCode, data } = res
				
				if (statusCode === 401) {
					console.log('=== Token 过期，尝试刷新 ===')
					
					if (isRefreshing) {
						return new Promise((resolve) => {
							subscribeTokenRefresh((newToken) => {
								options.header = options.header || {}
								options.header.Authorization = `Bearer ${newToken}`
								resolve(request(options))
							})
						}).then(resolve).catch(reject)
					}
					
					isRefreshing = true
					
					try {
						const refreshToken = storage.getRefreshToken()
						if (!refreshToken) {
							throw new Error('没有刷新令牌')
						}
						
						const refreshRes = await new Promise((resolve, reject) => {
							uni.request({
								url: config.baseUrl + '/gw/open/refresh_token',
								method: 'POST',
								data: {
									refreshToken
								},
								header: {
									'Content-Type': 'application/json'
								},
								success: (res) => {
									if (res.statusCode === 200 && res.data.code === 0) {
										resolve(res.data)
									} else {
										reject(res.data)
									}
								},
								fail: reject
							})
						})
						
						if (refreshRes.data && refreshRes.data.accessToken) {
							storage.setToken(refreshRes.data.accessToken)
							if (refreshRes.data.refreshToken) {
								storage.setRefreshToken(refreshRes.data.refreshToken)
							}
							
							onTokenRefreshed(refreshRes.data.accessToken)
							isRefreshing = false
							
							options.header = options.header || {}
							options.header.Authorization = `Bearer ${refreshRes.data.accessToken}`
							
							const retryRes = await request(options)
							resolve(retryRes)
						} else {
							throw new Error('刷新令牌失败')
						}
					} catch (refreshError) {
						console.error('=== 刷新令牌失败 ===', refreshError)
						isRefreshing = false
						storage.removeToken()
						storage.removeRefreshToken()
						storage.removeUserInfo()
						
						if (!noAuthModal) {
							uni.showModal({
								title: '登录过期',
								content: '请重新登录',
								showCancel: false,
								success: () => {
									uni.reLaunch({
										url: '/pages/login/login'
									})
								}
							})
						} else {
							// 不弹出窗口，直接返回错误
							const error = new Error('401 Unauthorized')
							error.statusCode = 401
							reject(error)
							return
						}
						
						reject(refreshError)
					}
				} else if (statusCode === 200) {
					if (data.code === 0 || data.success === true) {
						resolve(data)
					} else {
						console.error('=== 业务错误 ===')
						console.error('Code:', data.code)
						console.error('Message:', data.message)
						if (!noAuthModal) {
							uni.showModal({
								title: '请求失败',
								content: data.message || '服务器返回错误',
								showCancel: false
							})
						}
						reject(data)
					}
				} else {
					console.error('=== HTTP错误 ===')
					console.error('StatusCode:', statusCode)
					console.error('Response:', data)
					if (!noAuthModal) {
						uni.showModal({
							title: '网络错误',
							content: `状态码: ${statusCode}`,
							showCancel: false
						})
					}
					reject(res)
				}
			},
			fail: (err) => {
				console.error('=== 请求失败 ===')
				console.error('Error:', err)
				console.error('Error Message:', err.errMsg)
				
				let errorMsg = '网络连接失败'
				if (err.errMsg) {
					if (err.errMsg.includes('timeout')) {
						errorMsg = '请求超时，请检查网络'
					} else if (err.errMsg.includes('fail')) {
						errorMsg = '网络连接失败，请检查网络设置'
					} else if (err.errMsg.includes('request:fail')) {
						errorMsg = `连接失败: ${err.errMsg}`
					}
				}
				
				if (!noAuthModal) {
					uni.showModal({
						title: '错误',
						content: errorMsg,
						showCancel: false
					})
				}
				reject(err)
			}
		})
	})
}

const api = {
	wxLogin(code) {
		return request({
			url: config.api.login,
			method: 'POST',
			data: {
				wxMiniCode: code
			}
		})
	},

	getQuestion(categorySn) {
		return request({
			url: config.api.getQuestion,
			method: 'POST',
			data: categorySn ? { category_sn: categorySn } : {}
		})
	},

	answerQuestion(sn, answer) {
		return request({
			url: config.api.answerQuestion,
			method: 'POST',
			data: {
				sn,
				answer
			}
		})
	},

	getCategoryQuestion(categorySn) {
		return request({
			url: config.api.getCategoryQuestion,
			method: 'POST',
			data: { category_sn: categorySn }
		})
	},

	answerCategoryQuestion(sn, answer) {
		return request({
			url: config.api.answerCategoryQuestion,
			method: 'POST',
			data: {
				sn,
				answer
			}
		})
	},

	getQuicklyQuestion() {
		return request({
			url: config.api.getQuicklyQuestion,
			method: 'POST'
		})
	},

	answerQuicklyQuestion(sn, answer) {
		return request({
			url: config.api.answerQuicklyQuestion,
			method: 'POST',
			data: {
				sn,
				answer
			}
		})
	},

	getAllCategory() {
		return request({
			url: config.api.getAllCategory,
			method: 'POST'
		})
	},

	getRecord(page = 1, pageSize = 10) {
		return request({
			url: '/qgdzs/auth/get_record',
			method: 'POST',
			data: {
				page,
				page_size: pageSize
			},
			noAuthModal: true
		})
	},

	getQuestionBySn(questionSn) {
		return request({
			url: '/qgdzs/open/get_question',
			method: 'POST',
			data: {
				question_sn: questionSn
			}
		})
	},

	getQuestionInfo(questionSn) {
		return request({
			url: '/qgdzs/open/get_question_info',
			method: 'POST',
			data: {
				question_sn: questionSn
			}
		})
	},

	get(url, data = {}) {
		return request({
			url,
			method: 'GET',
			data
		})
	},

	post(url, data = {}) {
		return request({
			url,
			method: 'POST',
			data
		})
	},

	put(url, data = {}) {
		return request({
			url,
			method: 'PUT',
			data
		})
	},

	delete(url, data = {}) {
		return request({
			url,
			method: 'DELETE',
			data
		})
	}
}

export default api