package handler

import (
	"encoding/base64"
	"encoding/json"
	"fmt"
	"honoka-chan/encrypt"
	"honoka-chan/model"
	"honoka-chan/utils"
	"net/http"
	"net/url"
	"strconv"
	"time"

	"github.com/gin-gonic/gin"
)

func AuthKeyHandler(ctx *gin.Context) {
	reqTime := time.Now().Unix()
	authReq := model.AuthKeyReq{}
	err := json.Unmarshal([]byte(ctx.PostForm("request_data")), &authReq)
	if err != nil {
		panic(err)
	}
	dummyToken64, err := base64.StdEncoding.DecodeString(authReq.DummyToken)
	if err != nil {
		panic(err)
	}
	dummyTokenDecrypted := encrypt.RSA_Decrypt(dummyToken64, "privatekey.pem")
	clientToken := base64.RawStdEncoding.EncodeToString(dummyTokenDecrypted)
	aesKey := dummyTokenDecrypted[0:16]
	data64, err := base64.StdEncoding.DecodeString(authReq.AuthData)
	if err != nil {
		panic(err)
	}
	dataDecrypted := utils.Sub16(encrypt.AES_CBC_Decrypt(data64, aesKey))
	fmt.Println(string(dataDecrypted))

	mRandStr := utils.RandomStr(32)
	serverToken := base64.RawStdEncoding.EncodeToString([]byte(mRandStr))

	authorizeToken := utils.RandomBase64Token(32)

	nonce++

	authData := map[string]interface{}{
		"client_token": clientToken,
		"server_token": serverToken,
		"nonce":        nonce,
	}
	_, err = redisCli.HSet(redisCtx, authorizeToken, authData).Result()
	if err != nil {
		panic(err)
	}

	authResp := model.AuthKeyResp{}
	authResp.ResponseData.DummyToken = serverToken
	authResp.ResponseData.AuthorizeToken = authorizeToken
	authResp.StatusCode = 200
	resp, err := json.Marshal(authResp)
	if err != nil {
		panic(err)
	}
	fmt.Println(string(resp))

	respTime := time.Now().Unix()
	authorizeStr := fmt.Sprintf("consumerKey=lovelive_test&timeStamp=%d&version=1.1&nonce=%d&requestTimeStamp=%d", respTime, nonce, reqTime)
	fmt.Println(authorizeStr)

	xms := encrypt.RSA_Sign_SHA1(resp, "privatekey.pem")
	xms64 := base64.RawStdEncoding.EncodeToString(xms)

	ctx.Header("user_id", "")
	ctx.Header("authorize", authorizeStr)
	ctx.Header("X-Message-Sign", xms64)
	ctx.JSON(http.StatusOK, authResp)
}

func LoginHandler(ctx *gin.Context) {
	reqTime := time.Now().Unix()
	authorizeStr := ctx.Request.Header["Authorize"]
	if len(authorizeStr) == 0 {
		ctx.String(http.StatusForbidden, "Fuck you!")
		return
	}
	fmt.Println(authorizeStr[0])
	urlParams, err := url.ParseQuery(authorizeStr[0])
	if err != nil {
		panic(err)
	}
	fmt.Println(urlParams)
	authToken := urlParams["token"]
	if len(authToken) == 0 {
		ctx.String(http.StatusForbidden, "Fuck you!")
		return
	}
	authData, err := redisCli.HGetAll(redisCtx, authToken[0]).Result()
	if err != nil {
		panic(err)
	}
	fmt.Println(authData)
	clientToken, serverToken, clientNonce := authData["client_token"], authData["server_token"], authData["nonce"]
	fmt.Println(clientToken)
	clientToken64, err := base64.RawStdEncoding.DecodeString(clientToken)
	if err != nil {
		panic(err)
	}
	serverToken64, err := base64.RawStdEncoding.DecodeString(serverToken)
	if err != nil {
		panic(err)
	}
	xmcKey := utils.SliceXor([]byte(clientToken64), []byte(serverToken64))
	fmt.Println(xmcKey)
	aesKey := xmcKey[0:16]
	loginReq := model.LoginReq{}
	err = json.Unmarshal([]byte(ctx.PostForm("request_data")), &loginReq)
	if err != nil {
		panic(err)
	}
	key64, err := base64.StdEncoding.DecodeString(loginReq.LoginKey)
	if err != nil {
		panic(err)
	}
	pass64, err := base64.StdEncoding.DecodeString(loginReq.LoginPasswd)
	if err != nil {
		panic(err)
	}
	keyDescrypted := utils.Sub16(encrypt.AES_CBC_Decrypt(key64, aesKey))
	fmt.Println(string(keyDescrypted))
	passDescrypted := utils.Sub16(encrypt.AES_CBC_Decrypt(pass64, aesKey))
	fmt.Println(string(passDescrypted))

	nonce, _ = strconv.Atoi(clientNonce)
	nonce++

	authorizeToken := utils.RandomBase64Token(32)
	uid, err := redisCli.HGet(redisCtx, "login_key_uid", string(keyDescrypted)).Result()
	if err != nil {
		ctx.String(http.StatusForbidden, "Fuck you!")
		return
	}
	userId, _ := strconv.Atoi(uid)

	loginResp := model.LoginResp{}
	loginResp.ResponseData.AuthorizeToken = authorizeToken
	loginResp.ResponseData.UserId = userId
	loginResp.ResponseData.ServerTimestamp = time.Now().Unix()
	loginResp.ResponseData.AdultFlag = 2
	loginResp.StatusCode = 200
	resp, err := json.Marshal(loginResp)
	if err != nil {
		panic(err)
	}
	fmt.Println(string(resp))

	respTime := time.Now().Unix()
	newAuthorizeStr := fmt.Sprintf("consumerKey=lovelive_test&timeStamp=%d&version=1.1&token=%s&nonce=%d&user_id=%d&requestTimeStamp=%d", respTime, authorizeToken, nonce, userId, reqTime)
	fmt.Println(newAuthorizeStr)

	xms := encrypt.RSA_Sign_SHA1(resp, "privatekey.pem")
	xms64 := base64.RawStdEncoding.EncodeToString(xms)

	ctx.Header("user_id", "")
	ctx.Header("authorize", newAuthorizeStr)
	ctx.Header("X-Message-Sign", xms64)
	ctx.JSON(http.StatusOK, loginResp)
}