'use strict';
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments)).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t;
    return { next: verb(0), "throw": verb(1), "return": verb(2) };
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (_) try {
            if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [0, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var VideoToFramesMethod;
(function (VideoToFramesMethod) {
    VideoToFramesMethod[VideoToFramesMethod["fps"] = 0] = "fps";
    VideoToFramesMethod[VideoToFramesMethod["totalFrames"] = 1] = "totalFrames";
})(VideoToFramesMethod || (VideoToFramesMethod = {}));
var VideoToFrames = (function () {
    function VideoToFrames() {
    }
    VideoToFrames.getFrames = function (videoUrl, amount, type, width, height) {
        var _this = this;
        if (type === void 0) { type = VideoToFramesMethod.fps; }
        return new Promise(function (resolve, reject) {
            var frames = [];
            var canvas = document.createElement('canvas');
            var context = canvas.getContext('2d', { willReadFrequently: true });
            var duration;
            var video = document.createElement('video');
            video.preload = 'auto';
            var that = _this;
            video.addEventListener('loadeddata', function () {
                return __awaiter(this, void 0, void 0, function () {
                    var totalFrames, time, _a, _b, _c;
                    return __generator(this, function (_d) {
                        switch (_d.label) {
                            case 0:
                                canvas.width = video.videoWidth;
                                canvas.height = video.videoHeight;
                                duration = video.duration;
                                totalFrames = amount;
                                if (type === VideoToFramesMethod.fps) {
                                    totalFrames = duration * amount;
                                }
                                time = 0;
                                _d.label = 1;
                            case 1:
                                if (!(time < duration))
                                    return [3 /*break*/, 4];
                                _b = (_a = frames).push;
                                return [4 /*yield*/, that.getVideoFrame(video, context, time, width, height)];
                            case 2:
                                _b.apply(_a, [_d.sent()]);
                                _d.label = 3;
                            case 3:
                                time += duration / totalFrames;
                                return [3 /*break*/, 1];
                            case 4:
                                resolve(frames);
                                return [2 /*return*/];
                        }
                    });
                });
            });
            video.src = videoUrl;
            video.load();
        });
    };
    VideoToFrames.getVideoFrame = function (video, context, time, width, height) {
        var _this = this;
        return new Promise(function (resolve, reject) {
            var eventCallback = function () {
                video.removeEventListener('seeked', eventCallback);
                _this.storeFrame(video, context, resolve, width, height);
            };
            video.addEventListener('seeked', eventCallback);
            video.currentTime = time;
        });
    };
    VideoToFrames.storeFrame = function (video, context, resolve, width, height) {
        context.drawImage(video, 0, 0, width, height);
        resolve(context.getImageData(0, 0, width, height, { willReadFrequently: true }));
    };
    // VideoToFrames.storeFrame = function (video, context, resolve) {
    //     context.drawImage(video, 0, 0, video.videoWidth, video.videoHeight);
    //     resolve(context.getImageData(0, 0, video.videoWidth, video.videoHeight));
    // };
    return VideoToFrames;
}());
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