<template>
  <view class="template-login2" >
    <!-- 顶部自定义导航 -->
    <tn-nav-bar fixed alpha customBack>
      <view slot="back" class='tn-custom-nav-bar__back'
        @click="goBack">
        <text class='icon tn-icon-left'></text>
        <text class='icon tn-icon-home-capsule-fill'></text>
      </view>
    </tn-nav-bar>
    
    
    <canvas canvas-id="star_canvas" class="mycanvas" :style="'width:' + screenWidth + 'px;height:' + screenHeight + 'px;'"></canvas>
    
    <view class="login">
      <!-- 顶部背景图片-->
      <!-- <view class="login__bg login__bg--top">
        <image class="bg" src="https://resource.tuniaokj.com/images/login/1/login_top2.jpg" mode="widthFix"></image>
      </view>
      <view class="login__bg login__bg--top">
        <image class="rocket rocket-sussuspension" src="https://resource.tuniaokj.com/images/login/1/login_top3.png" mode="widthFix"></image>
      </view> -->
      
      <view class="login__wrapper">
        <!-- 登录/注册切换 -->
        <view class="login__mode tn-flex tn-flex-direction-row tn-flex-nowrap tn-flex-col-center tn-flex-row-center">
          <view class="login__mode__item tn-flex-1" :class="[{'login__mode__item--active': currentModeIndex === 0}]" @tap.stop="modeSwitch(0)">
            登录
          </view>
          <view class="login__mode__item tn-flex-1" :class="[{'login__mode__item--active': currentModeIndex === 1}]" @tap.stop="modeSwitch(1)">
            注册
          </view>
          
          <!-- 滑块-->
          <view class="login__mode__slider tn-cool-bg-color-15--reverse" :style="[modeSliderStyle]"></view>
        </view>
        
        <!-- 输入框内容-->
        <view class="login__info tn-flex tn-flex-direction-column tn-flex-col-center tn-flex-row-center">
          <!-- 登录 -->
          <block v-if="currentModeIndex === 0">
            <view class="login__info__item__input tn-flex tn-flex-direction-row tn-flex-nowrap tn-flex-col-center tn-flex-row-left">
              <view class="login__info__item__input__left-icon">
                <view class="tn-icon-phone"></view>
              </view>
              <view class="login__info__item__input__content">
                <input maxlength="20" placeholder-class="input-placeholder" placeholder="请输入登录手机号码" />
              </view>
            </view>
            
            <view class="login__info__item__input tn-flex tn-flex-direction-row tn-flex-nowrap tn-flex-col-center tn-flex-row-left">
              <view class="login__info__item__input__left-icon">
                <view class="tn-icon-lock"></view>
              </view>
              <view class="login__info__item__input__content">
                <input :password="!showPassword" placeholder-class="input-placeholder" placeholder="请输入登录密码" />
              </view>
              <view class="login__info__item__input__right-icon" @click="showPassword = !showPassword">
                <view :class="[showPassword ? 'tn-icon-eye' : 'tn-icon-eye-hide']"></view>
              </view>
            </view>
          </block>
          <!-- 注册 -->
          <block v-if="currentModeIndex === 1">
            <view class="login__info__item__input tn-flex tn-flex-direction-row tn-flex-nowrap tn-flex-col-center tn-flex-row-left">
              <view class="login__info__item__input__left-icon">
                <view class="tn-icon-phone"></view>
              </view>
              <view class="login__info__item__input__content">
                <input maxlength="20" placeholder-class="input-placeholder" placeholder="请输入注册手机号码" />
              </view>
            </view>
            
            <view class="login__info__item__input tn-flex tn-flex-direction-row tn-flex-nowrap tn-flex-col-center tn-flex-row-left">
              <view class="login__info__item__input__left-icon">
                <view class="tn-icon-code"></view>
              </view>
              <view class="login__info__item__input__content login__info__item__input__content--verify-code">
                <input placeholder-class="input-placeholder" placeholder="请输入验证码" />
              </view>
              <view class="login__info__item__input__right-verify-code" @tap.stop="getCode">
                <tn-button backgroundColor="#01BEFF" fontColor="#FFFFFF" size="sm" padding="5rpx 10rpx" width="100%" shape="round">{{ tips }}</tn-button>
              </view>
            </view>
            
            <view class="login__info__item__input tn-flex tn-flex-direction-row tn-flex-nowrap tn-flex-col-center tn-flex-row-left">
              <view class="login__info__item__input__left-icon">
                <view class="tn-icon-lock"></view>
              </view>
              <view class="login__info__item__input__content">
                <input :password="!showPassword" placeholder-class="input-placeholder" placeholder="请输入登录密码" />
              </view>
              <view class="login__info__item__input__right-icon" @click="showPassword = !showPassword">
                <view :class="[showPassword ? 'tn-icon-eye' : 'tn-icon-eye-hide']"></view>
              </view>
            </view>
          </block>
          
          <view class="login__info__item__button tn-cool-bg-color-7--reverse" hover-class="tn-hover" :hover-stay-time="150">{{ currentModeIndex === 0 ? '登录' : '注册'}}</view>
          
          <view v-if="currentModeIndex === 0" class="login__info__item__tips">忘记密码?</view>
        </view>
        
        <!-- 其他登录方式 -->
        <view class="login__way tn-flex tn-flex-col-center tn-flex-row-center">
          <view class="tn-padding-sm tn-margin-xs">
            <view class="login__way__item--icon tn-flex tn-flex-row-center tn-flex-col-center tn-shadow-blur tn-bg-green tn-color-white">
              <view class="tn-icon-wechat-fill"></view>
            </view>
          </view>
          <view class="tn-padding-sm tn-margin-xs">
            <view class="login__way__item--icon tn-flex tn-flex-row-center tn-flex-col-center tn-shadow-blur tn-bg-red tn-color-white">
              <view class="tn-icon-sina"></view>
            </view>
          </view>
          <view class="tn-padding-sm tn-margin-xs">
            <view class="login__way__item--icon tn-flex tn-flex-row-center tn-flex-col-center tn-shadow-blur tn-bg-blue tn-color-white">
              <view class="tn-icon-qq"></view>
            </view>
          </view>
        </view>
      </view>
      
      
      <!-- 底部背景图片-->
      <!-- <view class="login__bg login__bg--bottom">
        <image src="https://resource.tuniaokj.com/images/login/1/login_bottom_bg.jpg" mode="widthFix"></image>
      </view> -->
    </view>
    
    <!-- 验证码倒计时 -->
    <tn-verification-code
      ref="code"
      uniqueKey="login-demo-2"
      :seconds="60"
      @change="codeChange">
    </tn-verification-code>
  </view>
</template>

<script>
  import template_page_mixin from '@/libs/mixin/template_page_mixin.js'
  
  const Point = class {
    constructor(x, y) {
      this.x = x
      this.y = y
      this.r = 1 + Math.random() * 2
      this.sx = Math.random() * 2 - 1
      this.sy = Math.random() * 2 - 1
    }
  
    draw(ctx) {
      ctx.beginPath()
      ctx.arc(this.x, this.y, this.r, 0, 2 * Math.PI)
      ctx.closePath()
      ctx.fillStyle = '#fff'
      ctx.fill()
    }
  
    move(w, h) {
      this.x += this.sx
      this.y += this.sy
      if (this.x > w || this.x < 0) this.sx = -this.sx
      if (this.y > h || this.y < 0) this.sy = -this.sy
    }
  
    drawLine(ctx, p) {
      const dx = this.x - p.x
      const dy = this.y - p.y
      const d = Math.sqrt(dx * dx + dy * dy)
      if (d < 100) {
        var alpha = (100 - d) / 300 * 1
        ctx.beginPath()
        ctx.moveTo(this.x, this.y)
        ctx.lineTo(p.x, p.y)
        ctx.closePath()
        ctx.strokeStyle = 'rgba(255, 255, 255, ' + alpha + ')'
        ctx.strokeWidth = 1
        ctx.stroke()
      }
    }
  }
  
  const sysinfo = uni.getSystemInfoSync()
  const w = 400
  const h = 1000
  
  
  export default {
    name: 'login-demo-2',
    mixins: [template_page_mixin],
    data() {
      return {
        ctx: null,
        screenWidth: sysinfo.screenWidth,
        screenHeight: sysinfo.screenHeight,
        timer: null,
        points: [],
        
        // 当前选中的模式
        currentModeIndex: 0,
        // 模式选中滑块
        modeSliderStyle: {
          left: 0
        },
        // 是否显示密码
        showPassword: false,
        // 倒计时提示文字
        tips: '获取验证码'
      }
    },
    onLoad(options) {
      this.from = options.from || ''
      
      for (let i = 0; i < 80; i++) {
        this.points.push(new Point(Math.random() * w, Math.random() * h))
      }
      this.ctx = uni.createCanvasContext('star_canvas')
      // console.log(points)
    
      this.gameloop() //进行
      // this.ctx.setFillStyle('red')
      // this.ctx.fillRect(200, 300, 50, 50)
      // this.ctx.draw()
    },
    onUnload() {
      clearTimeout(this.timer)
    },
    
    watch: {
      currentModeIndex(value) {
        const sliderWidth = uni.upx2px(476 / 2)
        this.modeSliderStyle.left = `${sliderWidth * value}px`
      }
    },
    methods: {
      /**粒子进行*/
      gameloop() {
        this.timer = setTimeout(this.gameloop, 100);
        // console.log('gameloop')
        this.paint();
      },
      /**清空画布*/
      paint() {
        this.ctx.clearRect(0, 0, w, h)
        for (var i = 0; i < this.points.length; i++) {
          this.points[i].move(w, h)
          this.points[i].draw(this.ctx)
          for (var j = i + 1; j < this.points.length; j++) {
            this.points[i].drawLine(this.ctx, this.points[j])
          }
        }
        this.ctx.draw();
      },
      // 切换模式
      modeSwitch(index) {
        this.currentModeIndex = index
        this.showPassword = false
      },
      // 获取验证码
      getCode() {
        if (this.$refs.code.canGetCode) {
          this.$tn.message.loading('正在获取验证码')
          setTimeout(() => {
            this.$tn.message.closeLoading()
            this.$tn.message.toast('验证码已经发送')
            // 通知组件开始计时
            this.$refs.code.start()
          }, 2000)
        } else {
          this.$tn.message.toast(this.$refs.code.secNum + '秒后再重试')
        }
      },
      // 获取验证码倒计时被修改
      codeChange(event) {
        this.tips = event
      }
    }
  }
</script>

<style lang="scss" scoped>
  @import '@/static/css/templatePage/custom_nav_bar.scss';
  
  /* 粒子背景 start*/
  .template-login2 {
    background: linear-gradient(90deg, #892FE8, #3D7EFF);
    min-height: 100vh
  }
  // .template-login2:before {
  // 		content: "";
  // 		position: absolute;
  // 		top: 0;
  // 		left: 0;
  // 		bottom: 0;
  //     right: 0;
  // 		-webkit-mask-image: -webkit-gradient(linear, left top, left bottom, from(transparent), to(black));
  // 		-webkit-mask-image: linear-gradient(to bottom, transparent, black);
  // 		        mask-image: -webkit-gradient(linear, left top, left bottom, from(transparent), to(black));
  // 		        mask-image: linear-gradient(to bottom, transparent, black);
  // 		background: -webkit-gradient(linear, left top, right top, from(#E72F8C), to(#892FE8));
  // 		background: linear-gradient(90deg, #E72F8C, #892FE8);	
  //   }
  
  .mycanvas {
    position: absolute;
    background-size: cover;
    width: 100vw;
    height: 100vh;
    justify-content: center;
    flex-direction: column;
    color: #fff;
  }
  
  

  .login {
    position: relative;
    height: 100%;
    z-index: 1;
    
    /* 内容 start */
    &__wrapper {
      padding-top: 400rpx;
      width: 100%;
    }
    
    /* 切换 start */
    &__mode {
      position: relative;
      margin: 0 auto;
      width: 476rpx;
      height: 77rpx;
      background-color: rgba(255,255,255,0.2);
      backdrop-filter: blur(6rpx);
      -webkit-backdrop-filter: blur(6rpx);
      box-shadow: 0rpx 10rpx 50rpx 0rpx rgba(0, 3, 72, 0.1);
      border-radius: 39rpx;
      
      &__item {
        height: 77rpx;
        width: 100%;
        line-height: 77rpx;
        text-align: center;
        font-size: 31rpx;
        color: #FFFFFF;
        letter-spacing: 1em;
        text-indent: 1em;
        z-index: 2;
        transition: all 0.4s;
        
        &--active {
          font-weight: bold;
          color: #FFFFFF;
        }
      }
      
      &__slider {
        position: absolute;
        height: inherit;
        width: calc(476rpx / 2);
        border-radius: inherit;
        box-shadow: 0rpx 18rpx 72rpx 18rpx rgba(0, 195, 255, 0.1);
        z-index: 1;
        transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
      }
    }
    /* 切换 end */
    
    /* 登录注册信息 start */
    &__info {
      margin: 0 50rpx;
      margin-top: 105rpx;
      padding: 30rpx 51rpx;
      padding-bottom: 0;
      border-radius: 20rpx;
      background-color: rgba(255,255,255,0.2);
      backdrop-filter: blur(6rpx);
      -webkit-backdrop-filter: blur(6rpx);
      border: 2rpx solid rgba(255, 255, 255, 0.1);
      box-shadow: 0rpx 10rpx 50rpx 0rpx rgba(0, 3, 72, 0.1);
      
      &__item {
        
        &__input {
          margin-top: 59rpx;
          width: 100%;
          height: 77rpx;
          border: 1rpx solid #FFFFFF;
          border-radius: 39rpx;
          
          &__left-icon {
            width: 10%;
            font-size: 44rpx;
            margin-left: 20rpx;
            color: #FFFFFF;
          }
          
          &__content {
            width: 80%;
            padding-left: 10rpx;
            
            &--verify-code {
              width: 56%;
            }
            
            input {
              font-size: 24rpx;
              color: #FFFFFF;
              // letter-spacing: 0.1em;
            }
          }
          
          &__right-icon {
            width: 10%;
            font-size: 44rpx;
            margin-right: 20rpx;
            color: #FFFFFF;
          }
          
          &__right-verify-code {
            width: 34%;
            margin-right: 20rpx;
          }
        }
        
        &__button {
          margin-top: 75rpx;
          margin-bottom: 39rpx;
          width: 100%;
          height: 77rpx;
          text-align: center;
          font-size: 31rpx;
          font-weight: bold;
          line-height: 77rpx;
          letter-spacing: 1em;
          text-indent: 1em;
          border-radius: 100rpx;
          color: #FFFFFF;
          background-color: rgba(255,255,255,0.2);
          // border: 2rpx solid #FFFFFF;
        }
        
        &__tips {
          margin: 30rpx 0;
          color: #FFFFFF;
        }
      }
    }
    /* 登录注册信息 end */
    
    /* 登录方式切换 start */
    &__way {
      margin: 0 auto;
      margin-top: 110rpx;
      
      &__item {
        &--icon {
          width: 77rpx;
          height: 77rpx;
          font-size: 50rpx;
          border-radius: 100rpx;
          margin-bottom: 18rpx;
          position: relative;
          z-index: 1;
          
          &::after {
            content: " ";
            position: absolute;
            z-index: -1;
            width: 100%;
            height: 100%;
            left: 0;
            bottom: 0;
            border-radius: inherit;
            opacity: 1;
            transform: scale(1, 1);
            background-size: 100% 100%;
            background-image: url(https://resource.tuniaokj.com/images/cool_bg_image/icon_bg5.png);
          }
        }
      }
    }
    /* 登录方式切换 end */
    /* 内容 end */
    
  }
  
  /deep/.input-placeholder {
    font-size: 24rpx;
    color: #E6E6E6;
  }
  
</style>
