class StreamWatcher {
	constructor() {
		this.streamId = this.getStreamId();
		this.srsUrl = this.getSrsUrl();
		this.streamData = null;
		this.refreshInterval = null;
		this.isFullscreen = false;
		this.player = null;
		this.isDestroyed = false;
		this.retryCount = 0;
		this.maxRetries = 3;
		this.userInteracted = false;
		this.pendingPlay = false;

		this.initializeElements();
		this.bindEvents();
		this.setupUserInteractionDetection();
		this.loadStreamData();
		this.startAutoRefresh();
	}

	getStreamId() {
		const metaTag = document.querySelector('meta[name="stream-id"]');
		if (!metaTag) {
			throw new Error("Stream ID not found in meta tags");
		}
		return metaTag.content;
	}

	getSrsUrl() {
		const metaTag = document.querySelector('meta[name="srs-url"]');
		if (!metaTag) {
			throw new Error("SRS URL not found in meta tags");
		}
		return metaTag.content;
	}

	initializeElements() {
		this.elements = {
			streamTitle: document.getElementById("streamTitle"),
			loadingState: document.getElementById("loadingState"),
			errorState: document.getElementById("errorState"),
			errorMessage: document.getElementById("errorMessage"),
			retryBtn: document.getElementById("retryBtn"),
			videoPlayer: document.getElementById("videoPlayer"),
			streamStatus: document.getElementById("streamStatus"),
			streamStats: document.getElementById("streamStats"),
			viewerCount: document.getElementById("viewerCount"),
			bitrate: document.getElementById("bitrate"),
			quality: document.getElementById("quality"),
			streamId: document.getElementById("streamId"),
			streamApp: document.getElementById("streamApp"),
			streamDuration: document.getElementById("streamDuration"),
			videoCodec: document.getElementById("videoCodec"),
			audioCodec: document.getElementById("audioCodec"),
			resolution: document.getElementById("resolution"),
			rtmpUrl: document.getElementById("rtmpUrl"),
			hlsUrl: document.getElementById("hlsUrl"),
			flvUrl: document.getElementById("flvUrl"),
			webrtcUrl: document.getElementById("webrtcUrl"),
			videoContainer: document.querySelector(".video-container"),
		};
	}

	setupUserInteractionDetection() {
		const events = ["click", "touchstart", "keydown", "scroll"];
		const handleInteraction = () => {
			this.userInteracted = true;
			if (this.pendingPlay && this.elements.videoPlayer) {
				this.attemptAutoplay();
			}

			for (const event of events) {
				document.removeEventListener(event, handleInteraction, {
					once: true,
					passive: true,
					capture: true,
				});
			}
		};

		for (const event of events) {
			document.addEventListener(event, handleInteraction, {
				once: true,
				passive: true,
				capture: true,
			});
		}
	}

	bindEvents() {
		this.elements.retryBtn.addEventListener("click", () => {
			this.retryCount = 0;
			this.userInteracted = true;
			this.loadStreamData();
		});

		this.elements.videoContainer.addEventListener("click", () => {
			this.userInteracted = true;
			if (this.elements.videoPlayer?.paused) {
				this.attemptAutoplay();
			}
		});

		const urlElements = [
			this.elements.rtmpUrl,
			this.elements.hlsUrl,
			this.elements.flvUrl,
			this.elements.webrtcUrl,
		];

		for (const element of urlElements) {
			element.addEventListener("click", (e) => {
				e.stopPropagation();
				const url = element.textContent.trim();
				if (url !== "-") {
					navigator.clipboard
						.writeText(url)
						.then(() => {
							element.style.background = "rgba(34, 197, 94, 0.2)";
							setTimeout(() => {
								element.style.background = "";
							}, 1000);
						})
						.catch(() => {});
				}
			});
		}

		document.addEventListener("visibilitychange", () => {
			if (document.hidden) {
				this.stopAutoRefresh();
			} else {
				this.startAutoRefresh();
				setTimeout(() => this.loadStreamData(), 100);
			}
		});

		document.addEventListener("fullscreenchange", () => {
			this.isFullscreen = !!document.fullscreenElement;
		});

		window.addEventListener("beforeunload", () => {
			this.cleanup();
		});
	}

	async loadStreamData() {
		const wasPlaying =
			this.elements.videoPlayer && !this.elements.videoPlayer.paused;

		if (!wasPlaying) {
			this.showLoading();
		}

		try {
			const controller = new AbortController();
			const timeoutId = setTimeout(() => controller.abort(), 8000);

			const response = await fetch("/api/streams", {
				method: "GET",
				headers: {
					Accept: "application/json",
					"Cache-Control": "no-cache",
				},
				credentials: "same-origin",
				signal: controller.signal,
			});

			clearTimeout(timeoutId);

			if (!response.ok) {
				throw new Error(`HTTP ${response.status}: ${response.statusText}`);
			}

			const result = await response.json();

			if (!result.success) {
				throw new Error(result.error || "Failed to load streams");
			}

			const streams = result.data.streams || [];
			const newStreamData = streams.find(
				(stream) =>
					stream.name === this.streamId || stream.id === this.streamId,
			);

			if (!newStreamData) {
				this.elements.streamTitle.textContent = `No stream found for: ${this.streamId}`;
				throw new Error("Stream not found");
			}

			const wasOnline = this.streamData?.publish?.active === true;
			const isOnline = newStreamData.publish?.active === true;

			this.streamData = newStreamData;
			this.updateStreamInfo();

			if (wasOnline !== isOnline || !this.player) {
				await this.setupVideoPlayer();
			}

			this.retryCount = 0;
		} catch (error) {
			if (error.name === "AbortError") {
				this.showError("Request timeout - please check your connection");
			} else {
				this.showError(error.message);
			}
		}
	}

	updateStreamInfo() {
		const stream = this.streamData;
		const isOnline = stream.publish?.active === true;

		this.elements.streamTitle.textContent =
			stream.name || `Stream ${this.streamId}`;

		this.elements.streamStats.style.display = isOnline ? "flex" : "none";

		if (isOnline) {
			this.elements.viewerCount.textContent = stream.clients || 0;
			this.elements.bitrate.textContent = this.formatBitrate(
				stream.kbps?.recv_30s || 0,
			);
			this.elements.quality.textContent = this.getQualityString(stream);
		}

		this.elements.streamId.textContent = stream.name || this.streamId;
		this.elements.streamApp.textContent = stream.app || "-";
		this.elements.streamDuration.textContent = isOnline
			? this.formatDuration(stream.publish?.duration)
			: "-";
		this.elements.videoCodec.textContent = stream.video
			? `${stream.video.codec} ${stream.video.profile || ""}`.trim()
			: "-";
		this.elements.audioCodec.textContent = stream.audio?.codec || "-";
		this.elements.resolution.textContent = stream.video
			? `${stream.video.width || "?"}x${stream.video.height || "?"}`
			: "-";

		this.updateStreamUrls(stream);
	}

	updateStreamUrls(stream) {
		const srsHost = new URL(this.srsUrl).host;
		const streamPath = `${stream.app}/${stream.name}`;

		this.elements.rtmpUrl.textContent = `rtmp://${srsHost}/${streamPath}`;
		this.elements.hlsUrl.textContent = `${this.srsUrl}/${streamPath}.m3u8`;
		this.elements.flvUrl.textContent = `${this.srsUrl}/${streamPath}.flv`;
		this.elements.webrtcUrl.textContent = `webrtc://${srsHost}/${streamPath}`;
	}

	async setupVideoPlayer() {
		const stream = this.streamData;

		if (!stream.publish?.active) {
			this.showError("Stream is currently offline");
			return;
		}

		if (
			this.player &&
			this.elements.videoPlayer &&
			!this.elements.videoPlayer.paused
		) {
			this.showVideo();
			return;
		}

		this.cleanupPlayer();

		const videoElement = this.elements.videoPlayer;
		const hlsUrl = `${this.srsUrl}/${stream.app}/${stream.name}.m3u8`;
		const flvUrl = `${this.srsUrl}/${stream.app}/${stream.name}.flv`;

		const hasFlvjs = typeof flvjs !== "undefined";
		if (hasFlvjs && flvjs.isSupported()) {
			await this.setupFlvjsPlayer(videoElement, flvUrl, hlsUrl);
		} else {
			await this.setupNativePlayer(videoElement, hlsUrl);
		}
	}

	async setupFlvjsPlayer(videoElement, flvUrl, hlsUrl) {
		try {
			this.player = flvjs.createPlayer(
				{
					type: "flv",
					url: flvUrl,
					isLive: true,
					cors: true,
				},
				{
					enableWorker: false,
					enableStashBuffer: false,
					stashInitialSize: 128,
					isLive: true,
					lazyLoad: false,
					lazyLoadMaxDuration: 0,
					lazyLoadRecoverDuration: 0,
					deferLoadAfterSourceOpen: false,
					autoCleanupMaxBackwardDuration: 2,
					autoCleanupMinBackwardDuration: 1,
					statisticsInfoReportInterval: 1000,
					fixAudioTimestampGap: true,
					accurateSeek: false,
					seekType: "range",
					liveBufferLatencyChasing: true,
					liveBufferLatencyMaxLatency: 1.5,
					liveBufferLatencyMinRemain: 0.3,
				},
			);

			const newVideoElement = this.setupVideoEvents(videoElement);

			this.player.on(flvjs.Events.ERROR, (errorType, errorDetail) => {
				console.warn(
					"FLV.js error, falling back to HLS:",
					errorType,
					errorDetail,
				);
				this.cleanupPlayer();
				setTimeout(() => this.setupNativePlayer(newVideoElement, hlsUrl), 100);
			});

			this.player.attachMediaElement(newVideoElement);

			const loadPromise = new Promise((resolve, reject) => {
				const loadTimeout = setTimeout(() => {
					reject(new Error("FLV load timeout"));
				}, 3000);

				this.player.on(flvjs.Events.MEDIA_INFO, () => {
					clearTimeout(loadTimeout);
					resolve();
				});
			});

			this.player.load();

			try {
				await loadPromise;
			} catch {
				console.warn("FLV.js load timeout, falling back to HLS");
				this.cleanupPlayer();
				await this.setupNativePlayer(newVideoElement, hlsUrl);
			}
		} catch (error) {
			console.warn("FLV.js setup failed, using native player:", error);
			await this.setupNativePlayer(videoElement, hlsUrl);
		}
	}

	async setupNativePlayer(videoElement, url) {
		try {
			const newVideoElement = this.setupVideoEvents(videoElement);

			newVideoElement.crossOrigin = "anonymous";
			newVideoElement.preload = "metadata";
			newVideoElement.autoplay = true;
			newVideoElement.muted = true;
			newVideoElement.playsInline = true;
			newVideoElement.controls = false;

			if (newVideoElement.canPlayType("application/vnd.apple.mpegurl")) {
				newVideoElement.setAttribute("playsinline", "");
				newVideoElement.setAttribute("webkit-playsinline", "");
			}

			newVideoElement.src = url;
			newVideoElement.load();
		} catch (error) {
			console.error("Native player setup failed:", error);
			this.showError("Failed to load video stream");
		}
	}

	setupVideoEvents(videoElement) {
		const newVideoElement = videoElement.cloneNode(true);
		videoElement.parentNode.replaceChild(newVideoElement, videoElement);
		this.elements.videoPlayer = newVideoElement;

		newVideoElement.removeAttribute("src");
		newVideoElement.load();

		newVideoElement.addEventListener("loadstart", () => {
			this.showLoading();
		});

		newVideoElement.addEventListener("loadedmetadata", () => {
			this.attemptAutoplay();
		});

		newVideoElement.addEventListener("canplay", () => {
			this.showVideo();
			this.attemptAutoplay();
		});

		newVideoElement.addEventListener("playing", () => {
			this.showVideo();
			this.pendingPlay = false;
		});

		newVideoElement.addEventListener("waiting", () => {
			setTimeout(() => {
				if (newVideoElement.readyState < 3) {
					this.showLoading();
				}
			}, 500);
		});

		newVideoElement.addEventListener("error", () => {
			const error = newVideoElement.error;
			console.error("Video error:", error);

			if (this.retryCount < this.maxRetries) {
				this.retryCount++;
				setTimeout(
					() => {
						if (!this.isDestroyed) {
							console.log(`Retrying video load (attempt ${this.retryCount})`);
							const stream = this.streamData;
							const hlsUrl = `${this.srsUrl}/${stream.app}/${stream.name}.m3u8`;
							this.cleanupPlayer();
							this.setupNativePlayer(newVideoElement, hlsUrl);
						}
					},
					Math.min(1000 * this.retryCount, 5000),
				);
			} else {
				this.showError(
					`Video failed to load: ${error?.message || "Unknown error"}`,
				);
			}
		});

		newVideoElement.addEventListener("pause", () => {
			if (!this.isDestroyed && this.streamData?.publish?.active) {
				setTimeout(() => {
					if (newVideoElement.paused && !this.isDestroyed) {
						this.attemptAutoplay();
					}
				}, 1000);
			}
		});

		return newVideoElement;
	}

	async attemptAutoplay() {
		if (!this.elements.videoPlayer || this.isDestroyed) return;

		try {
			this.elements.videoPlayer.muted = true;

			const playPromise = this.elements.videoPlayer.play();

			if (playPromise !== undefined) {
				await playPromise;
				console.log("Autoplay successful");
			}
		} catch (error) {
			console.warn("Autoplay failed:", error);

			if (!this.userInteracted) {
				this.pendingPlay = true;
				this.showPlayButton();
			} else {
				setTimeout(() => {
					if (!this.elements.videoPlayer.paused) return;
					this.elements.videoPlayer.play().catch(() => {});
				}, 500);
			}
		}
	}

	showPlayButton() {
		if (!document.getElementById("playButtonOverlay")) {
			const overlay = document.createElement("div");
			overlay.id = "playButtonOverlay";
			overlay.style.cssText = `
				position: absolute;
				top: 50%;
				left: 50%;
				transform: translate(-50%, -50%);
				background: rgba(0,0,0,0.7);
				color: white;
				padding: 20px;
				border-radius: 50%;
				cursor: pointer;
				font-size: 24px;
				z-index: 1000;
				display: flex;
				align-items: center;
				justify-content: center;
				width: 80px;
				height: 80px;
			`;
			overlay.innerHTML = "▶";

			overlay.addEventListener("click", () => {
				this.userInteracted = true;
				this.attemptAutoplay();
				overlay.remove();
			});

			this.elements.videoContainer.style.position = "relative";
			this.elements.videoContainer.appendChild(overlay);
		}
	}

	cleanupPlayer() {
		if (this.player) {
			try {
				this.player.pause();
				this.player.unload();
				this.player.detachMediaElement();
				this.player.destroy();
			} catch (e) {
				console.warn("Error cleaning up player:", e);
			}
			this.player = null;
		}

		if (this.elements.videoPlayer) {
			this.elements.videoPlayer.pause();
			this.elements.videoPlayer.src = "";
			this.elements.videoPlayer.removeAttribute("src");
			this.elements.videoPlayer.load();
		}

		const overlay = document.getElementById("playButtonOverlay");
		if (overlay) {
			overlay.remove();
		}
	}

	cleanup() {
		this.isDestroyed = true;
		this.stopAutoRefresh();
		this.cleanupPlayer();
	}

	formatBitrate(kbps) {
		if (kbps >= 1000) {
			return `${(kbps / 1000).toFixed(1)} Mbps`;
		}
		return `${kbps} kbps`;
	}

	formatDuration(ms) {
		if (!ms) return "0s";
		const seconds = Math.floor(ms / 1000);
		const minutes = Math.floor(seconds / 60);
		const hours = Math.floor(minutes / 60);

		if (hours > 0) {
			return `${hours}h ${minutes % 60}m`;
		}
		if (minutes > 0) {
			return `${minutes}m ${seconds % 60}s`;
		}
		return `${seconds}s`;
	}

	getQualityString(stream) {
		if (!stream.video) return "Unknown";
		const width = stream.video.width;

		if (width >= 1920) return "1080p";
		if (width >= 1280) return "720p";
		if (width >= 854) return "480p";
		if (width >= 640) return "360p";
		return `${width}x${stream.video.height}`;
	}

	toggleFullscreen() {
		if (!this.isFullscreen) {
			this.elements.videoContainer.requestFullscreen().catch(() => {});
		} else {
			document.exitFullscreen().catch(() => {});
		}
	}

	startAutoRefresh() {
		if (this.refreshInterval) {
			this.stopAutoRefresh();
		}

		this.refreshInterval = setInterval(() => {
			if (!this.isDestroyed) {
				this.loadStreamData();
			}
		}, 15000);
	}

	stopAutoRefresh() {
		if (this.refreshInterval) {
			clearInterval(this.refreshInterval);
			this.refreshInterval = null;
		}
	}

	showLoading() {
		this.elements.loadingState.style.display = "flex";
		this.elements.errorState.style.display = "none";
		this.elements.videoPlayer.style.display = "none";
	}

	showError(message) {
		this.elements.loadingState.style.display = "none";
		this.elements.errorState.style.display = "flex";
		this.elements.videoPlayer.style.display = "none";
		this.elements.errorMessage.textContent = message;
	}

	showVideo() {
		this.elements.loadingState.style.display = "none";
		this.elements.errorState.style.display = "none";
		this.elements.videoPlayer.style.display = "block";
	}
}

try {
	new StreamWatcher();
} catch (error) {
	console.error("Failed to initialize StreamWatcher:", error);
}