<template>
  <div class="container">
    <div class="login">
      <div class="login-form">
        <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form">
          <h3 class="title">博诺思后台管理系统</h3>
          <template v-if="loginMethod === 'password'">
            <el-form-item prop="username">
              <el-input
                v-model="loginForm.username"
                type="text"
                auto-complete="off"
                :placeholder="placeholderText()"
              >
                <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon"/>
              </el-input>
            </el-form-item>
            <el-form-item prop="password">
              <el-input
                v-model="loginForm.password"
                type="password"
                auto-complete="off"
                placeholder="密码"
                @keyup.enter.native="handleLogin"
              >
                <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon"/>
              </el-input>
            </el-form-item>
            <el-form-item prop="code" v-if="captchaEnabled">
              <el-input
                v-model="loginForm.code"
                auto-complete="off"
                placeholder="验证码"
                style="width: 63%"
                @keyup.enter.native="handleLogin"
              >
                <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon"/>
              </el-input>
              <div class="login-code">
                <img :src="codeUrl" @click="getCode" class="login-code-img"/>
              </div>
            </el-form-item>
          </template>
          <template v-else>
            <el-form-item prop="mobile">
              <el-input
                v-model="loginForm.mobile"
                type="text"
                auto-complete="off"
                :placeholder="placeholderCodeText()"
              >
                <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon"/>
              </el-input>
            </el-form-item>
            <el-form-item prop="code" v-if="captchaEnabled">
              <el-input
                v-model="loginForm.code"
                auto-complete="off"
                placeholder="验证码"
                style="width: 63%"
                @keyup.enter.native="handleLogin"
              >
                <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon"/>
              </el-input>
              <div class="login-code">
                <img :src="codeUrl" @click="getCode" class="login-code-img"/>
              </div>
            </el-form-item>
            <el-form-item prop="verificationCode">
              <el-input v-model="loginForm.verificationCode" placeholder="请输入验证码">
                <template slot="append">
                  <el-button
                    type="primary"
                    @click="sendCode"
                    :disabled="isSendingCode || captchaEnabled?!loginForm.code:false"
                    class="send-code-button"
                  >
                    {{ countdown === 0 ? '获取验证码' : `${countdown}s` }}
                  </el-button>
                </template>
                <svg-icon slot="prefix" icon-class="message" class="el-input__icon input-icon"/>
              </el-input>
            </el-form-item>
          </template>
          <div class="login-form-center">
            <el-link v-if="CONFIG.IS_CODE_LOGIN" @click="toggleLoginMethod">
              {{ loginMethod === 'password' ? '短信登录' : '密码登录' }}
            </el-link>
            <router-link v-if="CONFIG.IS_OPEN_REGISTER" to="/register">
              <el-link>注册账号</el-link>
            </router-link>
            <el-checkbox v-model="loginForm.rememberMe">记住密码</el-checkbox>
          </div>
          <el-form-item style="width: 100%;">
            <el-button
              :loading="loading"
              size="medium"
              type="primary"
              style="width: 100%;"
              @click.native.prevent="isLogin"
            >
              <span v-if="!loading">登 录</span>
              <span v-else>登 录 中...</span>
            </el-button>
          </el-form-item>
          <el-form-item>
            <div class="login-divider">第三方登录</div>
            <div class="login-icons">
              <div class="login-icon">
                <img :src="dingding" alt="Weibo">
              </div>
              <div class="login-icon">
                <img :src="wx" alt="WeChat">
              </div>
              <div class="login-icon">
                <img :src="qq" alt="QQ">
              </div>
            </div>
          </el-form-item>
        </el-form>
      </div>
    </div>
  </div>
</template>

<script>
import { getCodeImg } from '@/api/login'
import Cookies from 'js-cookie'
import { encrypt, decrypt } from '@/utils/jsencrypt'
import dingding from '@/assets/images/dingding.svg'
import wx from '@/assets/images/wx.svg'
import qq from '@/assets/images/QQ.svg'
import { getPlaceholderText, getCodePlaceholderText, CONFIG } from '@/utils/configure'

export default {
  name: 'Login',
  data() {
    return {
      dingding: dingding,
      wx: wx,
      qq: qq,
      codeUrl: '',
      loginForm: {
        username: '',
        password: '',
        rememberMe: false,
        code: '',
        mobile: '',
        verificationCode: '',
        uuid: '',
        loginType: '',
        mobileCodeType: 'login'
      },
      passwordLoginRules: {
        username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
        password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
        code: [{ required: true, trigger: 'change', message: '请输入验证码' }]
      },
      mobileLoginRules: {
        mobile: [{ required: true, trigger: 'blur', message: '请输入您的手机号' }],
        verificationCode: [{ required: true, trigger: 'blur', message: '请输入验证码' }]
      },
      loading: false,
      captchaEnabled: true,
      redirect: undefined,
      isSendingCode: false,
      countdown: 0,
      loginMethod: 'password', // 'password' or 'mobile'
      supportsPhoneLogin: false,
      supportsEmailLogin: false
    }
  },
  computed: {
    CONFIG() {
      return CONFIG
    },
    loginRules() {
      return this.loginMethod === 'password' ? this.passwordLoginRules : this.mobileLoginRules
    }
  },
  watch: {
    $route: {
      handler(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  created() {
    this.getCode()
    this.getCookie()
  },
  methods: {
    placeholderCodeText() {
      return getCodePlaceholderText()
    },
    placeholderText() {
      return getPlaceholderText()
    },
    getCode() {
      getCodeImg().then(res => {
        this.captchaEnabled = res.captchaEnabled !== undefined ? res.captchaEnabled : true
        console.log(this.captchaEnabled)
        if (this.captchaEnabled) {
          this.codeUrl = 'data:image/gif;base64,' + res.img
          this.loginForm.uuid = res.uuid
        }
      })
    },
    getCookie() {
      const username = Cookies.get('username')
      const password = Cookies.get('password')
      const rememberMe = Cookies.get('rememberMe')
      this.loginForm.username = username || ''
      this.loginForm.password = password ? decrypt(password) : ''
      this.loginForm.rememberMe = rememberMe === 'true'
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          if (this.loginForm.rememberMe) {
            Cookies.set('username', this.loginForm.username, { expires: 30 })
            Cookies.set('password', encrypt(this.loginForm.password), { expires: 30 })
            Cookies.set('rememberMe', this.loginForm.rememberMe, { expires: 30 })
          } else {
            Cookies.remove('username')
            Cookies.remove('password')
            Cookies.remove('rememberMe')
          }
          this.loginForm.loginType = this.loginMethod
          this.$store.dispatch('Login', this.loginForm)
            .then(() => this.$router.push({ path: this.redirect || '/' }))
            .catch(() => {
              this.loading = false
              if (this.captchaEnabled) this.getCode()
            })
        }
      })
    },
    isLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          if (this.loginForm.rememberMe) {
            Cookies.set('username', this.loginForm.username, { expires: 30 })
            Cookies.set('password', encrypt(this.loginForm.password), { expires: 30 })
            Cookies.set('rememberMe', this.loginForm.rememberMe, { expires: 30 })
          } else {
            Cookies.remove('username')
            Cookies.remove('password')
            Cookies.remove('rememberMe')
          }
          let that = this
          this.loginForm.loginType = this.loginMethod
          this.$store.dispatch('IsLogin', this.loginForm)
            .then(res => {
              if (res.data) {
                this.$modal.confirm('账号已在其他地方登录是否继续登录！！！！').then(function() {
                  return that.handleLogin()
                }).then(() => {
                  this.loading = false
                }).catch(() => {
                  this.loading = false
                })
              } else {
                that.handleLogin()
              }
            })
            .catch(() => {
              this.loading = false
              if (this.captchaEnabled) this.getCode()
            })
        }
      })
    },
    sendCode() {
      if (this.captchaEnabled ? !this.loginForm.code : false) {
        this.$message.error('请先填写验证码')
        return
      }

      if (!this.loginForm.mobile) {
        this.$message.error('请先填写' + getCodePlaceholderText())
        return
      }
      this.$store.dispatch('GetPhoneCode', this.loginForm)
        .then(() => {
          this.isSendingCode = true
          this.countdown = 60
          const timer = setInterval(() => {
            this.countdown -= 1
            if (this.countdown <= 0) {
              clearInterval(timer)
              this.isSendingCode = false
            }
          }, 1000)
        })
        .catch(() => {
          this.loading = false
          // 如果启用了验证码，则重新获取验证码
          if (this.captchaEnabled) {
            this.getCode()
          }
          // 其他失败处理逻辑
          this.isSendingCode = false
          this.countdown = 0
        })
    },
    toggleLoginMethod() {
      this.loginMethod = this.loginMethod === 'password' ? 'mobile' : 'password'
      this.loginForm.username = ''
      this.loginForm.password = ''
      this.loginForm.code = ''
      this.loginForm.verificationCode = ''
      this.loginForm.loginMethod = ''
      this.getCode()
    }
  }
}
</script>

<style lang="scss">
.container {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  height: 100%;
  background-image: url("../assets/images/bg.png");
  background-size: cover;
}

.login {
  width: 42%;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}

.title {
  margin: 0 auto 30px;
  text-align: center;
  color: #707070;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px;

  .el-input {
    height: 38px;

    input {
      height: 38px;
    }
  }

  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 2px;
  }

  .login-form-center {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 1%;
    margin-bottom: 5%;
  }
}

.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}

.login-code {
  width: 33%;
  float: right;

  img {
    cursor: pointer;
    vertical-align: middle;
  }
}

.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}

.login-code-img {
  height: 38px;
}

.login-container {
  text-align: center;
  margin-top: 50px;
}

.login-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 20px 0;
}

.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid #ccc;
}

.login-divider:not(:empty)::before {
  margin-right: .25em;
}

.login-divider:not(:empty)::after {
  margin-left: .25em;
}

.login-icons {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.login-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.login-icon img {
  width: 50px;
  height: 50px;
}
</style>
