new Vue({
  el: "#app",
  data: {
    files: [],
    index: 0,
    interval: null,
    carouselTimeout: 20000,
    carouselActive: true,
    videoSrc: null,
    isDownloading: false,
    controlsTimeout: null,
  },
  methods: {
    next: function () {
      if (this.index + 1 < this.files.length) {
        this.index++;
      } else {
        this.index = 0;
      }
      this.refreshVideoSrc();
    },
    nextClick: function () {
      this.next();
      this.startCarousel();
    },
    prev: function () {
      if (this.index - 1 >= 0) {
        this.index--;
      } else {
        this.index = this.files.length - 1;
      }
      this.refreshVideoSrc();
    },
    prevClick: function () {
      this.next();
      this.startCarousel();
    },
    loadData: function () {
      this.isDownloading = true;
      const prom = fetch('api/files').then(response => response.json());
      prom.then(
        data => {
          this.files = data.resource || [];
          this.startCarousel();
          this.refreshVideoSrc();
          this.isDownloading = false;
          setTimeout(() => this.loadData(), (this.files.length*this.carouselTimeout)+1000);
        }
      );
      return prom;
    },
    refreshVideoSrc: function () {      
      // force video src reload
      this.videoSrc = null;
      setTimeout(() => {
        if (this.files[this.index].mime.includes('video')) {
          this.videoSrc = '/files/'+this.files[this.index].basename;
        }
      }, 100);
    },
    startCarousel: function (time = this.carouselTimeout) { 
      this.carouselActive = true;     
      clearInterval(this.interval);
      this.interval = setInterval(this.next, time);
    },
    stopCarousel: function () {      
      this.carouselActive = false;
      clearInterval(this.interval);
    },
    toggleCarousel: function () {
      if (this.carouselActive) {
        this.stopCarousel();
      } else {
        this.startCarousel();
      }
    },
    toggleControls: function () {
      clearTimeout(this.controlsTimeout)
      if (document.querySelector('.controls').style.display === "none") {
        document.querySelector('.controls').style.display = "";
        this.animateCSS('.floatBtn.left', 'fadeInLeft');
        this.animateCSS('.floatBtn.right', 'fadeInRight');
        this.animateCSS('.floatBtn.bottom', 'fadeInUp');
        this.controlsTimeout = setTimeout(() => this.toggleControls(), 15000);
      } else {
        Promise.all([
          this.animateCSS('.floatBtn.left', 'fadeOutLeft'),
          this.animateCSS('.floatBtn.right', 'fadeOutRight'),
          this.animateCSS('.floatBtn.bottom', 'fadeOutDown')
        ]).then(data => {
          document.querySelector('.controls').style.display = "none"
        });
      }
    },
    animateCSS: function (element, animation, prefix = 'animate__') {
      // We create a Promise and return it
      return new Promise((resolve, reject) => {
        const animationName = `${prefix}${animation}`;
        const node = document.querySelector(element);

        node.classList.add(`${prefix}animated`, animationName);

        // When the animation ends, we clean the classes and resolve the Promise
        function handleAnimationEnd() {
          node.classList.remove(`${prefix}animated`, animationName);
          node.removeEventListener('animationend', handleAnimationEnd);

          resolve('Animation ended');
        }

        node.addEventListener('animationend', handleAnimationEnd);
      })
    }
  },
  mounted() {
    this.loadData().then(data => {
      setTimeout(() => {
        this.animateCSS('.floatBtn.left', 'fadeInLeft');
        this.animateCSS('.floatBtn.right', 'fadeInRight');
        this.animateCSS('.floatBtn.bottom', 'fadeInUp');
        this.controlsTimeout = setTimeout(() => this.toggleControls(), 2500);
      }, 0);
    });
  }
})