{#if showController}
<div class="rr-controller">
  <div class="rr-timeline">
    <span class="rr-timeline__time">{formatTime(currentTime)}</span>
    <div class="rr-progress">
      <div class="rr-progress__step" ref:step style="width: {percentage}"></div>
      <div
        class="rr-progress__handler"
        ref:handler
        style="left: {percentage}"
      ></div>
    </div>
    <span class="rr-timeline__time">{formatTime(meta.totalTime)}</span>
  </div>
  <div class="rr-controller__btns">
    <button on:click="toggle()">
      {#if isPlaying}
      <svg
        t="1541411313529"
        class="icon"
        style=""
        viewBox="0 0 1024 1024"
        version="1.1"
        xmlns="http://www.w3.org/2000/svg"
        xmlns:xlink="http://www.w3.org/1999/xlink"
        width="16"
        height="16"
      >
        <path
          d="M682.65984 128q53.00224 0 90.50112 37.49888t37.49888 90.50112l0 512q0 53.00224-37.49888 90.50112t-90.50112 37.49888-90.50112-37.49888-37.49888-90.50112l0-512q0-53.00224 37.49888-90.50112t90.50112-37.49888zM341.34016 128q53.00224 0 90.50112 37.49888t37.49888 90.50112l0 512q0 53.00224-37.49888 90.50112t-90.50112 37.49888-90.50112-37.49888-37.49888-90.50112l0-512q0-53.00224 37.49888-90.50112t90.50112-37.49888zM341.34016 213.34016q-17.67424 0-30.16704 12.4928t-12.4928 30.16704l0 512q0 17.67424 12.4928 30.16704t30.16704 12.4928 30.16704-12.4928 12.4928-30.16704l0-512q0-17.67424-12.4928-30.16704t-30.16704-12.4928zM682.65984 213.34016q-17.67424 0-30.16704 12.4928t-12.4928 30.16704l0 512q0 17.67424 12.4928 30.16704t30.16704 12.4928 30.16704-12.4928 12.4928-30.16704l0-512q0-17.67424-12.4928-30.16704t-30.16704-12.4928z"
        ></path>
      </svg>
      {:else}
      <svg
        t="1541410561137"
        class="icon"
        style=""
        viewBox="0 0 1024 1024"
        version="1.1"
        xmlns="http://www.w3.org/2000/svg"
        xmlns:xlink="http://www.w3.org/1999/xlink"
        width="16"
        height="16"
      >
        <path
          d="M170.65984 896l0-768 640 384zM644.66944 512l-388.66944-233.32864 0 466.65728z"
        ></path>
      </svg>
      {/if}
    </button>
    {#each [1, 2, 4, 8] as s}
    <button class:active="s === speed" on:click="setSpeed(s)">{s}x</button>
    {/each}
  </div>
</div>
{/if}

<script>
  import { formatTime } from './utils.js';

  export default {
    data() {
      return {
        currentTime: 0,
        isPlaying: false,
        speed: 1,
      };
    },
    computed: {
      meta({ replayer }) {
        return replayer.getMetaData();
      },
      percentage({ currentTime, meta }) {
        const percent = Math.min(1, currentTime / meta.totalTime);
        return `${100 * percent}%`;
      },
    },
    helpers: {
      formatTime,
    },
    methods: {
      loopTimer() {
        const now = performance.now();
        let lastStep = now;
        const self = this;

        function update(step) {
          let { currentTime, meta, isPlaying, speed } = self.get();
          if (!isPlaying) {
            return;
          }

          const stepDiff = Math.floor(step - lastStep);
          lastStep = step;
          currentTime += speed * stepDiff;
          self.set({
            currentTime: Math.min(currentTime, meta.totalTime),
          });

          if (currentTime < meta.totalTime) {
            requestAnimationFrame(update);
          } else {
            self.set({ isPlaying: false, currentTime: 0 });
          }
        }

        requestAnimationFrame(update);
      },
      play() {
        const { replayer, currentTime } = this.get();
        if (currentTime > 0) {
          replayer.resume(currentTime);
        } else {
          replayer.play(currentTime);
        }
      },
      pause() {
        const { replayer } = this.get();
        replayer.pause();
      },
      toggle() {
        const { isPlaying } = this.get();
        if (isPlaying) {
          this.pause();
        } else {
          this.play();
        }
      },
      setSpeed(speed) {
        const { replayer } = this.get();
        replayer.setConfig({ speed });
        this.set({ speed });
      },
    },
    onupdate({ changed, current, previous }) {
      if (current.replayer && !previous) {
        // auto play
        this.set({ isPlaying: true });
        this.play();
        current.replayer.on('pause', () => {
          this.set({ isPlaying: false });
        });
        current.replayer.on('resume', () => {
          this.set({ isPlaying: true });
        });
      }
      if (changed.isPlaying) {
        if (current.isPlaying) {
          this.loopTimer();
        }
      }
    },
    ondestroy() {
      const { isPlaying } = this.get();
      if (isPlaying) {
        this.pause();
      }
    },
  };
</script>

<style>
  .rr-controller {
    width: 100%;
    height: 80px;
    background: #fff;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    border-radius: 0 0 5px 5px;
  }

  .rr-timeline {
    width: 80%;
    display: flex;
    align-items: center;
  }

  .rr-timeline__time {
    padding: 0 20px;
    color: #11103e;
  }

  .rr-progress {
    width: 100%;
    height: 4px;
    background: #eee;
    position: relative;
    border-radius: 3px;
  }

  .rr-progress__step {
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    background: #e0e1fe;
  }

  .rr-progress__handler {
    width: 20px;
    height: 20px;
    border-radius: 10px;
    position: absolute;
    top: 2px;
    transform: translate(-50%, -50%);
    background: rgb(73, 80, 246);
  }

  .rr-controller__btns {
    display: flex;
  }

  .rr-controller__btns button {
    width: 32px;
    height: 32px;
    display: flex;
    padding: 0;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    border-radius: 50%;
    cursor: pointer;
  }

  .rr-controller__btns button:active {
    background: #e0e1fe;
  }

  .rr-controller__btns button.active {
    color: #fff;
    background: rgb(73, 80, 246);
  }
</style>