/*
 * @Author: wangjiacheng
 * @Date: 2021-10-15 10:58:28
 * @LastEditors: wangjiacheng
 * @LastEditTime: 2021-10-15 14:17:38
 * @Description:
 */

export default {
  methods: {
    /* eslint-disable */
    fireworkss() {
      // window.addEventListener("resize", resizeCanvas, false);
      // window.addEventListener("DOMContentLoaded", onLoad, false);
      onLoad()

      window.requestAnimationFrame =
        window.requestAnimationFrame ||
        window.webkitRequestAnimationFrame ||
        window.mozRequestAnimationFrame ||
        window.oRequestAnimationFrame ||
        window.msRequestAnimationFrame ||
        function (callback) {
          window.setTimeout(callback, 1000 / 60);
        };

      var canvas, ctx, w, h, particles = [], probability = 0.04,
        xPoint, yPoint;
      function onLoad() {
        canvas = document.getElementById("canvas");
        ctx = canvas.getContext("2d");
        resizeCanvas();

        window.requestAnimationFrame(updateWorld);
      }

      function resizeCanvas() {
        if (!!canvas) {
          w = canvas.width = window.innerWidth;
          h = canvas.height = window.innerHeight;
        }
      }

      function updateWorld() {
        update();
        paint();
        window.requestAnimationFrame(updateWorld);
      }

      function update() {
        if (particles.length < 500 && Math.random() < probability) {
          createFirework();
        }
        var alive = [];
        for (var i = 0; i < particles.length; i++) {
          if (particles[i].move()) {
            alive.push(particles[i]);
          }
        }
        particles = alive;
      }

      function paint() {
        ctx.globalCompositeOperation = 'source-over';
        ctx.fillStyle = "rgba(0,0,0,0.2)";
        ctx.fillRect(0, 0, w, h);
        ctx.globalCompositeOperation = 'lighter';
        for (var i = 0; i < particles.length; i++) {
          particles[i].draw(ctx);
        }
      }

      function createFirework() {
        xPoint = Math.random() * (w - 200) + 100;
        yPoint = Math.random() * (h - 200) + 100;
        var nFire = Math.random() * 50 + 100;
        var c = "rgb(" + (~~(Math.random() * 200 + 55)) + ","
          + (~~(Math.random() * 200 + 55)) + "," + (~~(Math.random() * 200 + 55)) + ")";
        for (var i = 0; i < nFire; i++) {
          var particle = new Particle();
          particle.color = c;
          var vy = Math.sqrt(25 - particle.vx * particle.vx);
          if (Math.abs(particle.vy) > vy) {
            particle.vy = particle.vy > 0 ? vy : -vy;
          }
          particles.push(particle);
        }
      }

      function Particle() {
        this.w = this.h = Math.random() * 4 + 1;

        this.x = xPoint - this.w / 2;
        this.y = yPoint - this.h / 2;

        this.vx = (Math.random() - 0.5) * 10;
        this.vy = (Math.random() - 0.5) * 10;

        this.alpha = Math.random() * .5 + .5;

        this.color;
      }

      Particle.prototype = {
        gravity: 0.05,
        move: function () {
          this.x += this.vx;
          this.vy += this.gravity;
          this.y += this.vy;
          this.alpha -= 0.01;
          if (this.x <= -this.w || this.x >= screen.width ||
            this.y >= screen.height ||
            this.alpha <= 0) {
            return false;
          }
          return true;
        },
        draw: function (c) {
          c.save();
          c.beginPath();

          c.translate(this.x + this.w / 2, this.y + this.h / 2);
          c.arc(0, 0, this.w, 0, Math.PI * 2);
          c.fillStyle = this.color;
          c.globalAlpha = this.alpha;

          c.closePath();
          c.fill();
          c.restore();
        }
      }
    },
    fireworks() {
      var _createClass = function () {
        function defineProperties(target, props) {
          for (var i = 0; i < props.length; i++) {
            var descriptor = props[i];
            descriptor.enumerable = descriptor.enumerable || false;
            descriptor.configurable = true;
            if ("value" in descriptor) descriptor.writable = true;
            Object.defineProperty(target, descriptor.key, descriptor);
          }
        }

        return function (Constructor, protoProps, staticProps) {
          if (protoProps) defineProperties(Constructor.prototype, protoProps);
          if (staticProps) defineProperties(Constructor, staticProps);
          return Constructor;
        };
      }();

      function _classCallCheck(instance, Constructor) {
        if (!(instance instanceof Constructor)) {
          throw new TypeError("Cannot call a class as a function");
        }
      }

      var Progress = function () {
        function Progress() {
          var param = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];

          _classCallCheck(this, Progress);

          this.timestamp = null;
          this.duration = param.duration || Progress.CONST.DURATION;
          this.progress = 0;
          this.delta = 0;
          this.progress = 0;
          this.isLoop = !!param.isLoop;

          this.reset();
        }

        Progress.prototype.reset = function reset() {
          this.timestamp = null;
        };

        Progress.prototype.start = function start(now) {
          this.timestamp = now;
        };

        Progress.prototype.tick = function tick(now) {
          if (this.timestamp) {
            this.delta = now - this.timestamp;
            this.progress = Math.min(this.delta / this.duration, 1);

            if (this.progress >= 1 && this.isLoop) {
              this.start(now);
            }

            return this.progress;
          } else {
            return 0;
          }
        };

        _createClass(Progress, null, [{
          key: "CONST",
          get: function get() {
            return {
              DURATION: 1000
            };
          }
        }]);

        return Progress;
      }();

      var Confetti = function () {
        function Confetti(param) {
          _classCallCheck(this, Confetti);

          this.parent = param.elm || document.body;
          this.canvas = document.createElement("canvas");
          this.ctx = this.canvas.getContext("2d");
          this.width = param.width || this.parent.offsetWidth;
          this.height = param.height || this.parent.offsetHeight;
          this.length = param.length || Confetti.CONST.PAPER_LENGTH;
          this.yRange = param.yRange || this.height * 2;
          this.progress = new Progress({
            duration: param.duration,
            isLoop: true
          });
          this.rotationRange = typeof param.rotationLength === "number" ? param.rotationRange : 10;
          this.speedRange = typeof param.speedRange === "number" ? param.speedRange : 10;
          this.sprites = [];

          this.canvas.style.cssText = ["display: block", "position: absolute", "top: 0", "left: 0", "pointer-events: none"].join(";");

          this.render = this.render.bind(this);

          this.build();

          this.parent.append(this.canvas);
          this.progress.start(performance.now());

          requestAnimationFrame(this.render);
        }

        Confetti.prototype.build = function build() {
          for (var i = 0; i < this.length; ++i) {
            var canvas = document.createElement("canvas"),
              ctx = canvas.getContext("2d");

            canvas.width = Confetti.CONST.SPRITE_WIDTH;
            canvas.height = Confetti.CONST.SPRITE_HEIGHT;

            canvas.position = {
              initX: Math.random() * this.width,
              initY: -canvas.height - Math.random() * this.yRange
            };

            canvas.rotation = this.rotationRange / 2 - Math.random() * this.rotationRange;
            canvas.speed = this.speedRange / 2 + Math.random() * (this.speedRange / 2);

            ctx.save();
            ctx.fillStyle = Confetti.CONST.COLORS[Math.random() * Confetti.CONST.COLORS.length | 0];
            ctx.fillRect(0, 0, canvas.width, canvas.height);
            ctx.restore();

            this.sprites.push(canvas);
          }
        };

        Confetti.prototype.render = function render(now) {
          var progress = this.progress.tick(now);

          this.canvas.width = this.width;
          this.canvas.height = this.height;

          for (var i = 0; i < this.length; ++i) {
            this.ctx.save();
            this.ctx.translate(this.sprites[i].position.initX + this.sprites[i].rotation * Confetti.CONST.ROTATION_RATE * progress, this.sprites[i].position.initY + progress * (this.height + this.yRange));
            this.ctx.rotate(this.sprites[i].rotation);
            this.ctx.drawImage(this.sprites[i], -Confetti.CONST.SPRITE_WIDTH * Math.abs(Math.sin(progress * Math.PI * 2 * this.sprites[i].speed)) / 2, -Confetti.CONST.SPRITE_HEIGHT / 2, Confetti.CONST.SPRITE_WIDTH * Math.abs(Math.sin(progress * Math.PI * 2 * this.sprites[i].speed)), Confetti.CONST.SPRITE_HEIGHT);
            this.ctx.restore();
          }

          requestAnimationFrame(this.render);
        };

        _createClass(Confetti, null, [{
          key: "CONST",
          get: function get() {
            return {
              SPRITE_WIDTH: 9,
              SPRITE_HEIGHT: 16,
              PAPER_LENGTH: 100,
              DURATION: 8000,
              ROTATION_RATE: 50,
              COLORS: ["#EF5350", "#EC407A", "#AB47BC", "#7E57C2", "#5C6BC0", "#42A5F5", "#29B6F6", "#26C6DA", "#26A69A", "#66BB6A", "#9CCC65", "#D4E157", "#FFEE58", "#FFCA28", "#FFA726", "#FF7043", "#8D6E63", "#BDBDBD", "#78909C"]
            };
          }
        }]);

        return Confetti;
      }();

      (function () {
        var DURATION = 6000,
          LENGTH = 220;

        new Confetti({
          width: window.innerWidth,
          height: window.innerHeight,
          length: LENGTH,
          duration: DURATION
        });

        setTimeout(function () {
          new Confetti({
            width: window.innerWidth,
            height: window.innerHeight,
            length: LENGTH,
            duration: DURATION
          });
        }, DURATION / 2);
      })();
    }
  }
}