import {
	API_BASE_URL,
	DEFAULT_TENANT_ID,
	TOKEN_HEADER_NAME,
	clearAuthStorage,
	getStoredUserInfo,
	getToken,
	redirectToLogin
} from '../../utils/request'

export { API_BASE_URL, getToken }

const MODULES_API_URL = API_BASE_URL
const APP_SECRET = 'ffd6eee985af45e4a75098422d1decbb'
const AI_REQUEST_TIMEOUT = 10 * 60 * 1000

let realAtob
const b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
const b64re = /^(?:[A-Za-z\d+/]{4})*?(?:[A-Za-z\d+/]{2}(?:==)?|[A-Za-z\d+/]{3}=?)?$/

if (typeof atob !== 'function') {
	realAtob = function(str) {
		let input = String(str || '').replace(/[\t\n\f\r ]+/g, '')
		if (!b64re.test(input)) {
			throw new Error("Failed to execute 'atob': The string to be decoded is not correctly encoded.")
		}
		input += '=='.slice(2 - (input.length & 3))
		let bitmap
		let result = ''
		let r1
		let r2
		let index = 0
		for (; index < input.length;) {
			bitmap =
				(b64.indexOf(input.charAt(index++)) << 18) |
				(b64.indexOf(input.charAt(index++)) << 12) |
				((r1 = b64.indexOf(input.charAt(index++))) << 6) |
				(r2 = b64.indexOf(input.charAt(index++)))
			result +=
				r1 === 64
					? String.fromCharCode((bitmap >> 16) & 255)
					: r2 === 64
					? String.fromCharCode((bitmap >> 16) & 255, (bitmap >> 8) & 255)
					: String.fromCharCode((bitmap >> 16) & 255, (bitmap >> 8) & 255, bitmap & 255)
		}
		return result
	}
} else {
	realAtob = atob
}

function b64DecodeUnicode(str) {
	return decodeURIComponent(
		realAtob(str)
			.split('')
			.map((char) => `%${`00${char.charCodeAt(0).toString(16)}`.slice(-2)}`)
			.join('')
	)
}

function parseTokenPayload(token) {
	const rawToken = String(token || '').replace(/^Bearer\s+/i, '')
	const parts = rawToken.split('.')
	if (!rawToken || parts.length !== 3) {
		return null
	}
	try {
		const normalized = parts[1].replace(/-/g, '+').replace(/_/g, '/')
		return JSON.parse(b64DecodeUnicode(normalized))
	} catch (error) {
		return null
	}
}

function safeAdd(x, y) {
	const lsw = (x & 0xffff) + (y & 0xffff)
	const msw = (x >> 16) + (y >> 16) + (lsw >> 16)
	return (msw << 16) | (lsw & 0xffff)
}

function bitRotateLeft(num, cnt) {
	return (num << cnt) | (num >>> (32 - cnt))
}

function md5cmn(q, a, b, x, s, t) {
	return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b)
}

function md5ff(a, b, c, d, x, s, t) {
	return md5cmn((b & c) | (~b & d), a, b, x, s, t)
}

function md5gg(a, b, c, d, x, s, t) {
	return md5cmn((b & d) | (c & ~d), a, b, x, s, t)
}

function md5hh(a, b, c, d, x, s, t) {
	return md5cmn(b ^ c ^ d, a, b, x, s, t)
}

function md5ii(a, b, c, d, x, s, t) {
	return md5cmn(c ^ (b | ~d), a, b, x, s, t)
}

function binlMD5(x, len) {
	x[len >> 5] |= 0x80 << len % 32
	x[(((len + 64) >>> 9) << 4) + 14] = len

	let i
	let olda
	let oldb
	let oldc
	let oldd
	let a = 1732584193
	let b = -271733879
	let c = -1732584194
	let d = 271733878

	for (i = 0; i < x.length; i += 16) {
		olda = a
		oldb = b
		oldc = c
		oldd = d

		a = md5ff(a, b, c, d, x[i], 7, -680876936)
		d = md5ff(d, a, b, c, x[i + 1], 12, -389564586)
		c = md5ff(c, d, a, b, x[i + 2], 17, 606105819)
		b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330)
		a = md5ff(a, b, c, d, x[i + 4], 7, -176418897)
		d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426)
		c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341)
		b = md5ff(b, c, d, a, x[i + 7], 22, -45705983)
		a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416)
		d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417)
		c = md5ff(c, d, a, b, x[i + 10], 17, -42063)
		b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162)
		a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682)
		d = md5ff(d, a, b, c, x[i + 13], 12, -40341101)
		c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290)
		b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329)

		a = md5gg(a, b, c, d, x[i + 1], 5, -165796510)
		d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632)
		c = md5gg(c, d, a, b, x[i + 11], 14, 643717713)
		b = md5gg(b, c, d, a, x[i], 20, -373897302)
		a = md5gg(a, b, c, d, x[i + 5], 5, -701558691)
		d = md5gg(d, a, b, c, x[i + 10], 9, 38016083)
		c = md5gg(c, d, a, b, x[i + 15], 14, -660478335)
		b = md5gg(b, c, d, a, x[i + 4], 20, -405537848)
		a = md5gg(a, b, c, d, x[i + 9], 5, 568446438)
		d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690)
		c = md5gg(c, d, a, b, x[i + 3], 14, -187363961)
		b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501)
		a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467)
		d = md5gg(d, a, b, c, x[i + 2], 9, -51403784)
		c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473)
		b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734)

		a = md5hh(a, b, c, d, x[i + 5], 4, -378558)
		d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463)
		c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562)
		b = md5hh(b, c, d, a, x[i + 14], 23, -35309556)
		a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060)
		d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353)
		c = md5hh(c, d, a, b, x[i + 7], 16, -155497632)
		b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640)
		a = md5hh(a, b, c, d, x[i + 13], 4, 681279174)
		d = md5hh(d, a, b, c, x[i], 11, -358537222)
		c = md5hh(c, d, a, b, x[i + 3], 16, -722521979)
		b = md5hh(b, c, d, a, x[i + 6], 23, 76029189)
		a = md5hh(a, b, c, d, x[i + 9], 4, -640364487)
		d = md5hh(d, a, b, c, x[i + 12], 11, -421815835)
		c = md5hh(c, d, a, b, x[i + 15], 16, 530742520)
		b = md5hh(b, c, d, a, x[i + 2], 23, -995338651)

		a = md5ii(a, b, c, d, x[i], 6, -198630844)
		d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415)
		c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905)
		b = md5ii(b, c, d, a, x[i + 5], 21, -57434055)
		a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571)
		d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606)
		c = md5ii(c, d, a, b, x[i + 10], 15, -1051523)
		b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799)
		a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359)
		d = md5ii(d, a, b, c, x[i + 15], 10, -30611744)
		c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380)
		b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649)
		a = md5ii(a, b, c, d, x[i + 4], 6, -145523070)
		d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379)
		c = md5ii(c, d, a, b, x[i + 2], 15, 718787259)
		b = md5ii(b, c, d, a, x[i + 9], 21, -343485551)

		a = safeAdd(a, olda)
		b = safeAdd(b, oldb)
		c = safeAdd(c, oldc)
		d = safeAdd(d, oldd)
	}
	return [a, b, c, d]
}

function binl2rstr(input) {
	let index
	let output = ''
	const length32 = input.length * 32
	for (index = 0; index < length32; index += 8) {
		output += String.fromCharCode((input[index >> 5] >>> index % 32) & 0xff)
	}
	return output
}

function rstr2binl(input) {
	const output = Array(input.length >> 2)
	let index
	for (index = 0; index < output.length; index += 1) {
		output[index] = 0
	}
	const length8 = input.length * 8
	for (index = 0; index < length8; index += 8) {
		output[index >> 5] |= (input.charCodeAt(index / 8) & 0xff) << index % 32
	}
	return output
}

function rstrMD5(value) {
	return binl2rstr(binlMD5(rstr2binl(value), value.length * 8))
}

function rstr2hex(input) {
	const hexTab = '0123456789abcdef'
	let output = ''
	let index
	let value
	for (index = 0; index < input.length; index += 1) {
		value = input.charCodeAt(index)
		output += hexTab.charAt((value >>> 4) & 0x0f) + hexTab.charAt(value & 0x0f)
	}
	return output
}

function str2rstrUTF8(input) {
	return unescape(encodeURIComponent(input))
}

function md5(value) {
	return rstr2hex(rstrMD5(str2rstrUTF8(String(value || ''))))
}

function objKeySort(obj) {
	const next = {}
	Object.keys(obj || {})
		.sort()
		.forEach((key) => {
			next[key] = obj[key]
		})
	return next
}

function addSignature(payload) {
	const form = payload || {}
	form.timestamp = Date.now()
	form.version = 'v3'
	let sign = ''
	const sorted = objKeySort(form)
	Object.keys(sorted).forEach((key) => {
		const value = form[key]
		if (value !== null && value !== undefined && value !== '') {
			sign = `${sign}${value}-`
		}
	})
	form.sign = md5(`${sign}${APP_SECRET}`)
	return form
}

function getStorageValue(keys) {
	for (let index = 0; index < keys.length; index += 1) {
		const value = uni.getStorageSync(keys[index])
		if (value) {
			return value
		}
	}
	return ''
}

export function getCurrentUser() {
	const primaryToken = getToken()
	const storedUser = getStoredUserInfo()
	const tokenList = [
		primaryToken,
		uni.getStorageSync('uni_id_token'),
		uni.getStorageSync('access_token')
	].filter(Boolean)
	let payload = null

	for (let index = 0; index < tokenList.length; index += 1) {
		payload = parseTokenPayload(tokenList[index])
		if (payload) {
			break
		}
	}

	if (!payload) {
		return {
			...storedUser,
			token: primaryToken || ''
		}
	}

	return {
		...storedUser,
		userId: Number(payload.userId || payload.uid || payload.id || 0) || null,
		nickname: payload.nickname || payload.username || payload.nickName || '',
		realName: payload.realName || payload.realname || payload.name || '',
		token: primaryToken || ''
	}
}

export function apiRequest({
	url,
	method = 'GET',
	data,
	withSignature = true,
	withTenant = false,
	timeout
}) {
	const token = getToken()
	const requestData = data ? { ...data } : undefined
	const headers = {}

	if (token) {
		headers[TOKEN_HEADER_NAME] = token
	}

	if (requestData && withTenant) {
		requestData.tenantId = DEFAULT_TENANT_ID
	}

	if (requestData && withSignature) {
		addSignature(requestData)
	}

	return uni.request({
		url,
		method,
		data: requestData,
		header: headers,
		...(timeout !== undefined && { timeout })
	}).then((response) => {
		const responseHeader = (response && response.header) || {}
		const nextToken =
			responseHeader[TOKEN_HEADER_NAME] ||
			responseHeader[TOKEN_HEADER_NAME.toLowerCase()]
		if (nextToken) {
			uni.setStorageSync('access_token', nextToken)
		}

		const { statusCode } = response || {}
		const body = (response && response.data) || {}
		if (statusCode && statusCode >= 400) {
			return Promise.reject(new Error(body.message || '请求失败'))
		}
		if (Number(body.code) === 401) {
			clearAuthStorage()
			redirectToLogin()
			return Promise.reject(new Error(body.message || '登录已失效'))
		}
		if (body.code === 0) {
			return body.data !== undefined ? body.data : body.message
		}
		return Promise.reject(new Error(body.message || '请求失败'))
	})
}

export function listAiChatList(params) {
	return apiRequest({
		url: `${MODULES_API_URL}/ai/ai-chat-list`,
		method: 'GET',
		data: params
	})
}

export function listAiChatHistory(params) {
	return apiRequest({
		url: `${MODULES_API_URL}/ai/ai-chat-history`,
		method: 'GET',
		data: params
	})
}

export function removeAiChatList(id) {
	return apiRequest({
		url: `${MODULES_API_URL}/ai/ai-chat-list/${id}`,
		method: 'DELETE',
		withSignature: false
	})
}

export function sendMessage(data) {
	return apiRequest({
		url: `${API_BASE_URL}/ai/chat/message`,
		method: 'POST',
		data,
		withTenant: true,
		timeout: AI_REQUEST_TIMEOUT
	})
}

export function manuscriptGen(data) {
	return apiRequest({
		url: `${API_BASE_URL}/ai/manuscriptGen`,
		method: 'POST',
		data,
		withTenant: true,
		timeout: AI_REQUEST_TIMEOUT
	})
}

export function creativeAssistant(data) {
	return apiRequest({
		url: `${API_BASE_URL}/ai/creativeAssistant`,
		method: 'POST',
		data,
		withTenant: true,
		timeout: AI_REQUEST_TIMEOUT
	})
}

export function activityOutlineGen(data) {
	return apiRequest({
		url: `${API_BASE_URL}/ai/activityOutlineGen`,
		method: 'POST',
		data,
		withTenant: true,
		timeout: AI_REQUEST_TIMEOUT
	})
}

export function buildWebSocketUrl(userId) {
	const url = String(API_BASE_URL || '')
	if (/^https?:\/\//.test(url)) {
		return `${url
			.replace(/^https:/, 'wss:')
			.replace(/^http:/, 'ws:')
			.replace(/\/api\/?$/, '')
			.replace(/\/$/, '')}/chat/${userId}`
	}
	return `${url.replace(/\/api\/?$/, '')}/chat/${userId}`
}