import { Router } from 'express';
import Bottleneck from 'bottleneck';
import {
	clear,
	doRender,
	explodeUrl,
	generateOutputBundle,
	getNpmScript,
	listOutputFiles,
} from './renderer.js';
import path, { dirname } from 'path';
import { fileURLToPath } from 'url';
import pkg from 'common-utils';
const { Utils, PerformanceRecorder, FileUploader, Vault } = pkg;
import bodyParser from 'body-parser';
import { existsSync } from 'fs';
import { applyPluginsPostrender, applyPluginsPrerender } from './server-plugins/apply.js';
import { startChildProcess } from './proxy-renderer.js';
import { CaptionRenderer } from './utils/CaptionRender.js';
import { AvatarRenderer } from './utils/AvatarRender.js';

const RenderRouter = Router();
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const limiter = new Bottleneck({
	maxConcurrent: 1,
});
RenderRouter.use(bodyParser.json());
RenderRouter.use(bodyParser.urlencoded());

const renderSyncRequestStatuses = new Map();

class RenderController {
	stop() {
		throw new Error('Render not stoppable !');
	}
}

RenderRouter.get('/api/jobs', async (req, res) => {
	const jobIds = Array.from(renderSyncRequestStatuses.keys());
	const jobStatuses = jobIds.map((jobId) => {
		const jobStatus = renderSyncRequestStatuses.get(jobId);
		return {
			jobId: jobId,
			status: jobStatus.statusMessage,
			...jobStatus.result
		};
	});
	return res.status(200).json(jobStatuses);
});


RenderRouter.get('/api/jobs/:jobId/stop', async (req, res) => {
	const jobId = req.params.jobId;
	if (!jobId) {
		return res.status(400).json({ message: 'Missing jobId in request body.' });
	}

	if (jobId == 'all') {
		for (const [jobId, jobStatus] of renderSyncRequestStatuses.entries()) {
			if (jobStatus.controller && jobStatus.controller.stop) {
				try {
					jobStatus.controller.stopped = true;
					jobStatus.controller.stop();
				} catch (e) {
					console.error(`Failed to stop job ${jobId}: ${e.message}`);
				}
			}
			renderSyncRequestStatuses.delete(jobId);
		}
		return res.status(200).json({ message: 'All jobs stopped successfully.' });
	}

	const jobStatus = renderSyncRequestStatuses.get(jobId);
	if (!jobStatus) {
		return res.status(404).json({ message: `Job with ID ${jobId} not found.` });
	}

	if (jobStatus.controller && jobStatus.controller.stop) {
		try {
			jobStatus.controller.stopped = true;
			jobStatus.controller.stop();
			res
				.status(200)
				.json({ message: `Job ${jobId} stopped successfully.` });
		} catch (e) {
			res
				.status(400)
				.json({ message: `Job ${jobId} stoping failed. ${e.message}` });
		}
	} else {
		res
			.status(400)
			.json({ message: `Job ${jobId} is not currently running or cannot be stopped.` });
	}
	renderSyncRequestStatuses.delete(jobId);
});


RenderRouter.get('/api/jobs/:jobId', async (req, res) => {
	const jobId = req.params.jobId;
	const jobStatus = renderSyncRequestStatuses.get(jobId);

	if (jobStatus) {
		return res.status(200).json({
			message: jobStatus.message,
			statusMessage: jobStatus.statusMessage,
			...jobStatus.result
		});
	} else {
		return res.status(404).json({ message: `Job with ID ${jobId} not found.` });
	}
});


RenderRouter.post('/api/v1/start-preview', async (req, res) => {
	startChildProcess()
	res.status(200).json({ message: 'Starting...' });
});

RenderRouter.post('/api/render-sync', async (req, res) => {
	const jobId = req.body.jobId || Utils.generateUID(req.body.fileUrl);
	// delete all jobs that finished more than 24 hours ago
	const now = Date.now();
	for (const [jobId, jobStatus] of renderSyncRequestStatuses.entries()) {
		if (jobStatus.finished && (now - jobStatus.finished) > 24 * 60 * 60 * 1000) {
			renderSyncRequestStatuses.delete(jobId);
		}
	}

	const controller = new RenderController();
	if (renderSyncRequestStatuses.has(jobId) && !req.body.force && !req.query.force &&
		renderSyncRequestStatuses.get(jobId).statusMessage == 'IN_PROGRESS'
	) {
		let job = renderSyncRequestStatuses.get(jobId);
		return res.status(202).json({
			jobId,
			message: 'Job already in progress or queued.',
			...job.result
		});
	}

	let fileUrl = req.body.fileUrl;
	let targetUrl = req.body.targetUrl;
	let skipClear = req.body.skip_clear;
	let skipRender = req.body.skip_render;
	let zip = req.body.zip ?? true;

	// {name,...options}[]
	let plugins = req.body.plugins || [];

	if (!fileUrl) {
		return res.status(400).send({
			message:
				'Missing `fileUrl` in body. Required params `fileUrl`, `targetUrl`. Optionally pass `zip` to skip zipping and directly upload the files to targetUrl/{fileName}, `skip_clear` if you dont want to clear the folders after render, `skip_render` is you want to skip rendering, useful with `skip_clear` ',
		});
	}

	if (!targetUrl) {
		return res.status(400).send({
			message:
				'Missing `targetUrl` in body. The result will be uploaded to `targetUrl`',
		});
	}

	// make sure only 1 request is being processed at a time
	// set headers appropriately to hint that timeout must be large

	res.setHeader('X-Job-Id', jobId);
	res.setTimeout(0);
	res.setHeader('Connection', 'keep-alive');
	const perf = new PerformanceRecorder();
	let logs = [];
	try {
		const run = async () => {
			const dir = path.join(__dirname, 'public')
			const zipFile = path.join(dir, `exported-${jobId}.zip`)
			if (!existsSync(zipFile) || req.body.force || req.query.force) {
				if (!skipClear) {
					clear();
				}
				await explodeUrl(fileUrl, jobId, dir, zipFile);
			}
			else {
				console.log(`Job ${jobId} assets already exploded to public. Not downloading again.`)
			}

			let renderMethod = req.body.method || req.query.method || 'cli';
			const originalManuscriptPath = path.join(__dirname, `public`, `original_manuscript.json`)
			let originalManuscript = Utils.readFileToObject(originalManuscriptPath);
			await applyPluginsPrerender([...plugins, { name: 'flatten-paths' }], originalManuscript, originalManuscriptPath, jobId)
			renderMethod = originalManuscript.meta?.generationConfig?.extras?.renderMethod || renderMethod

			if (!skipRender) {
				if (renderMethod == 'media-with-caption-only') {
					let renderer = new AvatarRenderer();
					renderer.validateCaption(originalManuscript);
					await renderer.doRender(jobId,
						originalManuscript,
						(log) => {
							logs.push(log);
						},
						getNpmScript(req.query.media_type),
						req.body.caption_only,
						req.body.caption_only,
						controller);
				}
				else if (renderMethod == 'caption-only') {
					let renderer = new CaptionRenderer();
					renderer.validateCaption(originalManuscript);
					await renderer.doRender(jobId,
						originalManuscript,
						(log) => {
							logs.push(log);
						},
						getNpmScript(req.query.media_type),
						req.body.caption_only,
						req.body.caption_only,
						controller);
				}
				else if (renderMethod == 'cli' || req.query.media_type == 'image') {
					await doRender(
						jobId,
						originalManuscript,
						(jobId, log) => {
							logs.push(log);
						},
						getNpmScript(req.query.media_type),
						undefined,
						undefined,
						controller
					);
				}
				else if (renderMethod === 'all') {
					let errorMsg = ''
					let renderComplete = false;
					try {
						console.log('Render start via CLI')
						await doRender(
							jobId,
							originalManuscript,
							(jobId, log) => {
								logs.push(log);
							},
							getNpmScript(req.query.media_type),
							undefined,
							undefined,
							controller
						)
						renderComplete = true;
					} catch (e) {
						console.log('Render via CLI failed', e.message)
						errorMsg = "CLI: " + e.message
						if (controller.stopped) {
							throw new Error('Failed to render. Aborted. ' + errorMsg)
						}
					}
					if (!renderComplete) {
						try {
							console.log('Render start via Proxy')
							await doRender(
								jobId,
								originalManuscript,
								(jobId, log) => {
									logs.push(log);
								},
								getNpmScript(req.query.media_type),
								undefined,
								{
									...req.body.proxy,
									"framesPerChunk": req.body.proxy?.framesPerChunk || 99999
								},
								controller
							)
							renderComplete = true;
						} catch (e) {
							console.log('Render via Proxy failed', e.message)
							errorMsg = errorMsg + "\n\nProxy: " + e.message
							if (controller.stopped) {
								throw new Error('Failed to render. Aborted. ' + errorMsg)
							}
						}
					}

					if (!renderComplete) {
						try {
							console.log('Render start via Proxy Chunked')
							await doRender(
								jobId,
								originalManuscript,
								(jobId, log) => {
									logs.push(log);
								},
								getNpmScript(req.query.media_type),
								undefined,
								{
									...req.body.proxy
								},
								controller
							)
							renderComplete = true;
						} catch (e) {
							console.log('Render via Proxy Chunked failed', e.message)
							errorMsg = errorMsg + "\n\nProxyChunked: " + e.message
							if (controller.stopped) {
								throw new Error('Failed to render. Aborted. ' + errorMsg)
							}
						}
					}

					if (!renderComplete) {
						try {
							console.log('Render start via SSR')
							await doRender(
								jobId,
								originalManuscript,
								(jobId, log) => {
									logs.push(log);
								},
								getNpmScript(req.query.media_type),
								req.body.ssr || {},
								undefined,
								controller
							)
							renderComplete = true;
						} catch (e) {
							console.log('Render via SSR failed', e.message)
							errorMsg = errorMsg + "\n\nSSR: " + e.message
							if (controller.stopped) {
								throw new Error('Failed to render. Aborted. ' + errorMsg)
							}
						}
					}
					if (!renderComplete) {
						throw new Error('All render methods exhausted. Failed to render. ' + errorMsg)
					}
				}
				else if (renderMethod === 'ssr') {
					await doRender(
						jobId,
						originalManuscript,
						(jobId, log) => {
							logs.push(log);
						},
						getNpmScript(req.query.media_type),
						req.body.ssr || {},
						undefined,
						controller
					);
				} else if (renderMethod === 'proxy') {
					await doRender(
						jobId,
						originalManuscript,
						(jobId, log) => {
							logs.push(log);
						},
						getNpmScript(req.query.media_type),
						undefined,
						{
							...req.body.proxy,
							"framesPerChunk": req.body.proxy?.framesPerChunk || 99999
						},
						controller
					);
				} else if (renderMethod === 'proxy-chunked') {
					await doRender(
						jobId,
						originalManuscript,
						(jobId, log) => {
							logs.push(log);
						},
						getNpmScript(req.query.media_type),
						undefined,
						req.body.proxy || {},
						controller
					);
				}
			}


			const uploader = new FileUploader('oracle', {
				url: targetUrl + jobId + '/',
			});
			uploader.creds.url = uploader.creds.url;
			let outFiles = await listOutputFiles(jobId);
			await applyPluginsPostrender([...plugins, { name: 'hook' }], originalManuscript, originalManuscriptPath, jobId, outFiles)
			outFiles = await listOutputFiles(jobId);
			console.log('Render complete, took', perf.elapsedString(), 'uploading... to target folder: ' + targetUrl + jobId + '/')
			console.log('Files to upload: ', outFiles)
			if (zip) {
				let outFile = await generateOutputBundle(jobId, outFiles);
				let uploadResult = await uploader.upload(outFile);
				if (!skipClear) {
					clear();
				}
				return {
					response_time: perf.elapsed(),
					urls: [uploadResult.url],
					url: uploadResult.url,
					original_manuscript: originalManuscript,
				};
			} else {
				let urls = await Promise.all(
					outFiles.map((file) => {
						return uploader.upload(file);
					})
				).then((results) => {
					return results.map((result) => result.url);
				});
				let url =
					urls.find((u) => u.includes('.mp4')) ||
					urls.find((u) => u.includes('.webm')) ||
					urls.find((u) => u.includes('.mov')) ||
					urls.find((u) => u.includes('.avi')) ||
					urls.find((u) => u.includes('.jpg')) ||
					urls.find((u) => u.includes('.jpeg')) ||
					urls.find((u) => u.includes('.png'));
				return {
					response_time: perf.elapsed(),
					urls: urls,
					url,
					original_manuscript: originalManuscript,
				};
			}
		}

		renderSyncRequestStatuses.set(jobId,
			{
				id: jobId,
				controller,
				statusMessage: 'IN_PROGRESS',
				result: undefined
			}
		);

		const result = await limiter.schedule(run);
		let job = renderSyncRequestStatuses.get(jobId);
		if (job) {
			delete job.controller
			renderSyncRequestStatuses.set(jobId,
				{
					finished: Date.now(),
					id: jobId,
					response_time: perf.elapsedSeconds(),
					statusMessage: 'COMPLETED',
					result: { jobId, success: true, ...result }
				}
			);
		}
		res.status(200).json({ jobId, success: true, response_time: perf.elapsedSeconds(), ...result });
	} catch (err) {
		console.error(`Render job ${jobId} failed:`, err.message, err);

		let job = renderSyncRequestStatuses.get(jobId);
		if (job) {
			delete job.controller
			renderSyncRequestStatuses.set(jobId,
				{
					finished: Date.now(),
					id: jobId,
					message: err.message + ' Details : ' + logs.join('\n'),
					response_time: perf.elapsedSeconds(),
					statusMessage: 'FAILED',
					result: { jobId, success: false }
				}
			);
		}
		res.status(500).json({
			jobId,
			success: false,
			message: err.message + ' Details : ' + logs.join('\n'),
		});
	}
});

export default RenderRouter;