/**
 * 直连 RunForge 切换跑区（与 Worker lepao.setZone 一致），用于 token 探活，不经过 runpy。
 */
const axios = require('axios')
const { URLSearchParams } = require('url')
const db = require('../DataBase/db')
const { dataEncrypt, dataDecrypt, dataSign } = require('./Crypto')
const {
    getWebVpnCookieHeader,
    invalidateWebVpnCookie,
    isProbablyVpnLoginHtml,
    isWebVpnUnifiedAuthCredentialFailure,
    markLepaoUnifiedAuthFailed
} = require('../../lib/Lepao/webvpnCookie')

const BASE_URL = 'https://lepao.ctbu.edu.cn/v3/api.php'

const DEFAULT_UA =
    'Mozilla/5.0 (Linux; Android 16; 2211133C Build/BP2A.250605.031.A3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/138.0.7204.180 Mobile Safari/537.36 XWEB/1380347 MMWEBSDK/20250202 MMWEBID/1020 wxwork/5.0.6.66174 MicroMessenger/8.0.28.48(0x28001c30) MiniProgramEnv/android Luggage/3.0.2.95ef3f83 NetType/WIFI Language/zh_CN ABI/arm64'

const runZoneMap = {
    兰花湖校区跑区: 2,
    主校区北跑区: 3,
    主校区南跑区: 5,
    重庆工商大学茶园校区: 6
}

function lepaoTimestamp() {
    return Number((Date.now() / 1000).toFixed(3))
}

/**
 * @param {object} p
 * @param {string} p.uid
 * @param {string} p.token
 * @param {string|number} p.school_id
 * @param {string} p.student_num
 * @param {number} [p.random_id=1] path_data.id，需存在且 run_zone_name 可映射
 * @param {string} [p.userAgent]
 * @param {string} [p.create_user] 绑定用户 uuid，用于取 WebVPN Cookie（教务登录名与学号 student_num 一致）
 * @returns {Promise<object>} RunForge 响应体（与 Worker request 解密后形态一致）
 */
async function probeSetZone(p) {
    const {
        uid,
        token,
        school_id,
        student_num,
        random_id = 1,
        userAgent,
        create_user: createUser
    } = p

    const record = await db.query('SELECT run_zone_name FROM path_data WHERE id = ?', [random_id])
    if (!record || record.length === 0) {
        throw new Error('跑区不存在')
    }

    const runZoneId = runZoneMap[record[0].run_zone_name]
    if (!runZoneId) throw new Error('跑区不存在')

    const raw = {
        uid,
        token,
        school_id,
        term_id: 0,
        course_id: 0,
        class_id: 0,
        student_num,
        card_id: student_num,
        timestamp: lepaoTimestamp(),
        version: 1,
        nonce: String(Math.floor(Math.random() * 900000 + 100000)),
        ostype: 5,
        run_zone_id: String(runZoneId)
    }
    raw.sign = dataSign(raw)

    const form = new URLSearchParams()
    form.append('ostype', '5')
    form.append('data', dataEncrypt(JSON.stringify(raw)))

    let webvpnCookie
    if (createUser) {
        try {
            webvpnCookie = await getWebVpnCookieHeader(createUser, student_num, {
                skipPostWebVpnLepaoSync: true
            })
        } catch (e) {
            if (isWebVpnUnifiedAuthCredentialFailure(e)) {
                try {
                    await markLepaoUnifiedAuthFailed(student_num, createUser, student_num)
                } catch (_) {
                    /* ignore */
                }
            }
            throw new Error(e.message || 'WebVPN 登录失败')
        }
    }

    const buildHeaders = () => ({
        'Content-Type': 'application/x-www-form-urlencoded',
        Accept: '*/*',
        'Accept-Language': 'zh-CN,zh-Hans;q=0.9',
        'User-Agent': userAgent || DEFAULT_UA,
        Referer: 'https://servicewechat.com/wxf94c4ddb63d87ede/32/page-frame.html',
        charset: 'utf-8',
        ...(webvpnCookie ? { Cookie: webvpnCookie } : {})
    })

    const postOnce = () =>
        axios.post(`${BASE_URL}/Run/setRunZone`, form, {
            headers: buildHeaders(),
            timeout: 20000,
            proxy: false,
            responseType: 'text',
            transformResponse: [(b) => b]
        })

    let res = await postOnce()
    let result
    try {
        result = JSON.parse(res.data)
    } catch {
        result = res.data
    }

    if (
        typeof result === 'string' &&
        isProbablyVpnLoginHtml(result) &&
        createUser
    ) {
        await invalidateWebVpnCookie(createUser, student_num)
        try {
            webvpnCookie = await getWebVpnCookieHeader(createUser, student_num, {
                skipCache: true,
                skipPostWebVpnLepaoSync: true
            })
        } catch (vpnRefreshErr) {
            if (isWebVpnUnifiedAuthCredentialFailure(vpnRefreshErr)) {
                try {
                    await markLepaoUnifiedAuthFailed(student_num, createUser, student_num)
                } catch (_) {
                    /* ignore */
                }
            }
            throw new Error(vpnRefreshErr.message || 'WebVPN 登录失败')
        }
        res = await postOnce()
        try {
            result = JSON.parse(res.data)
        } catch {
            result = res.data
        }
    }

    if (result?.data && result?.is_encrypt === 1) {
        result = { ...result, data: JSON.parse(dataDecrypt(result.data)) }
    }
    return result
}

function isProbeSetZoneOk(result) {
    if (!result) return false
    const hasData = result.data != null && result.data !== ''
    if (!hasData) return false
    if (Number(result.status) === 1) return true
    const cd = Number(result.code)
    if (cd === 1 || cd === 200) return true
    return false
}

function getProbeFailMessage(result) {
    if (!result) return ''
    return (
        result.info ||
        result.msg ||
        result.message ||
        (typeof result.data === 'object' && result.data
            ? result.data.info || result.data.msg || result.data.message
            : '') ||
        ''
    )
}

module.exports = {
    probeSetZone,
    isProbeSetZoneOk,
    getProbeFailMessage,
    BASE_URL
}