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<script lang="ts">
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	import Spinner from '$lib/components/common/Spinner.svelte';
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	import { copyToClipboard } from '$lib/utils';
	import hljs from 'highlight.js';
	import 'highlight.js/styles/github-dark.min.css';
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	import { loadPyodide } from 'pyodide';
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	import { tick } from 'svelte';
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	import PyodideWorker from '$lib/workers/pyodide.worker?worker';
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	export let id = '';
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	export let lang = '';
	export let code = '';

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	let executing = false;
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	let stdout = null;
	let stderr = null;
	let result = null;

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	let copied = false;

	const copyCode = async () => {
		copied = true;
		await copyToClipboard(code);

		setTimeout(() => {
			copied = false;
		}, 1000);
	};

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	const checkPythonCode = (str) => {
		// Check if the string contains typical Python keywords, syntax, or functions
		const pythonKeywords = [
			'def',
			'class',
			'import',
			'from',
			'if',
			'else',
			'elif',
			'for',
			'while',
			'try',
			'except',
			'finally',
			'return',
			'yield',
			'lambda',
			'assert',
			'pass',
			'break',
			'continue',
			'global',
			'nonlocal',
			'del',
			'True',
			'False',
			'None',
			'and',
			'or',
			'not',
			'in',
			'is',
			'as',
			'with'
		];

		for (let keyword of pythonKeywords) {
			if (str.includes(keyword)) {
				return true;
			}
		}

		// Check if the string contains typical Python syntax characters
		const pythonSyntax = [
			'def ',
			'class ',
			'import ',
			'from ',
			'if ',
			'else:',
			'elif ',
			'for ',
			'while ',
			'try:',
			'except:',
			'finally:',
			'return ',
			'yield ',
			'lambda ',
			'assert ',
			'pass',
			'break',
			'continue',
			'global ',
			'nonlocal ',
			'del ',
			'True',
			'False',
			'None',
			' and ',
			' or ',
			' not ',
			' in ',
			' is ',
			' as ',
			' with ',
			':',
			'=',
			'==',
			'!=',
			'>',
			'<',
			'>=',
			'<=',
			'+',
			'-',
			'*',
			'/',
			'%',
			'**',
			'//',
			'(',
			')',
			'[',
			']',
			'{',
			'}'
		];

		for (let syntax of pythonSyntax) {
			if (str.includes(syntax)) {
				return true;
			}
		}

		// If none of the above conditions met, it's probably not Python code
		return false;
	};

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	const executePython = async (code) => {
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		if (!code.includes('input') && !code.includes('matplotlib')) {
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			executePythonAsWorker(code);
		} else {
			result = null;
			stdout = null;
			stderr = null;
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			executing = true;
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			document.pyodideMplTarget = document.getElementById(`plt-canvas-${id}`);
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			let pyodide = await loadPyodide({
				indexURL: '/pyodide/',
				stdout: (text) => {
					console.log('Python output:', text);
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					if (stdout) {
						stdout += `${text}\n`;
					} else {
						stdout = `${text}\n`;
					}
				},
				stderr: (text) => {
					console.log('An error occured:', text);
					if (stderr) {
						stderr += `${text}\n`;
					} else {
						stderr = `${text}\n`;
					}
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				},
				packages: ['micropip']
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			});
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			try {
				const micropip = pyodide.pyimport('micropip');
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				await micropip.set_index_urls('https://pypi.org/pypi/{package_name}/json');
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				let packages = [
					code.includes('requests') ? 'requests' : null,
					code.includes('bs4') ? 'beautifulsoup4' : null,
					code.includes('numpy') ? 'numpy' : null,
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					code.includes('pandas') ? 'pandas' : null,
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					code.includes('matplotlib') ? 'matplotlib' : null,
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					code.includes('sklearn') ? 'scikit-learn' : null,
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					code.includes('scipy') ? 'scipy' : null,
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					code.includes('re') ? 'regex' : null,
					code.includes('seaborn') ? 'seaborn' : null
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				].filter(Boolean);
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				console.log(packages);
				await micropip.install(packages);
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				result = await pyodide.runPythonAsync(`from js import prompt
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def input(p):
    return prompt(p)
__builtins__.input = input`);

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				result = await pyodide.runPython(code);

				if (!result) {
					result = '[NO OUTPUT]';
				}
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				console.log(result);
				console.log(stdout);
				console.log(stderr);
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				const pltCanvasElement = document.getElementById(`plt-canvas-${id}`);

				if (pltCanvasElement?.innerHTML !== '') {
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					pltCanvasElement.classList.add('pt-4');
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				}
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			} catch (error) {
				console.error('Error:', error);
				stderr = error;
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			}

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			executing = false;
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		}
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	};

	const executePythonAsWorker = async (code) => {
		result = null;
		stdout = null;
		stderr = null;

		executing = true;

		let packages = [
			code.includes('requests') ? 'requests' : null,
			code.includes('bs4') ? 'beautifulsoup4' : null,
			code.includes('numpy') ? 'numpy' : null,
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			code.includes('pandas') ? 'pandas' : null,
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			code.includes('sklearn') ? 'scikit-learn' : null,
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			code.includes('scipy') ? 'scipy' : null,
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			code.includes('re') ? 'regex' : null,
			code.includes('seaborn') ? 'seaborn' : null
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		].filter(Boolean);

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		console.log(packages);

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		const pyodideWorker = new PyodideWorker();
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		pyodideWorker.postMessage({
			id: id,
			code: code,
			packages: packages
		});

		setTimeout(() => {
			if (executing) {
				executing = false;
				stderr = 'Execution Time Limit Exceeded';
				pyodideWorker.terminate();
			}
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		}, 60000);
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		pyodideWorker.onmessage = (event) => {
			console.log('pyodideWorker.onmessage', event);
			const { id, ...data } = event.data;

			console.log(id, data);

			data['stdout'] && (stdout = data['stdout']);
			data['stderr'] && (stderr = data['stderr']);
			data['result'] && (result = data['result']);

			executing = false;
		};
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		pyodideWorker.onerror = (event) => {
			console.log('pyodideWorker.onerror', event);
			executing = false;
		};
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	};

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	$: highlightedCode = code ? hljs.highlightAuto(code, hljs.getLanguage(lang)?.aliases).value : '';
</script>

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{#if code}
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	<div class="mb-4" dir="ltr">
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		<div
			class="flex justify-between bg-[#202123] text-white text-xs px-4 pt-1 pb-0.5 rounded-t-lg overflow-x-auto"
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		>
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			<div class="p-1">{@html lang}</div>
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			<div class="flex items-center">
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				{#if ['', 'python'].includes(lang) && (lang === 'python' || checkPythonCode(code))}
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					{#if executing}
						<div class="copy-code-button bg-none border-none p-1 cursor-not-allowed">Running</div>
					{:else}
						<button
							class="copy-code-button bg-none border-none p-1"
							on:click={() => {
								executePython(code);
							}}>Run</button
						>
					{/if}
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				{/if}
				<button class="copy-code-button bg-none border-none p-1" on:click={copyCode}
					>{copied ? 'Copied' : 'Copy Code'}</button
				>
			</div>
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		</div>
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		<pre
			class=" hljs p-4 px-5 overflow-x-auto"
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			style="border-top-left-radius: 0px; border-top-right-radius: 0px; {(executing ||
				stdout ||
				stderr ||
				result) &&
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				'border-bottom-left-radius: 0px; border-bottom-right-radius: 0px;'}"><code
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				class="language-{lang} rounded-t-none whitespace-pre">{@html highlightedCode || code}</code
			></pre>
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		<div
			id="plt-canvas-{id}"
			class="bg-[#202123] text-white max-w-full overflow-x-auto scrollbar-hidden"
		/>
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		{#if executing}
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			<div class="bg-[#202123] text-white px-4 py-4 rounded-b-lg">
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				<div class=" text-gray-500 text-xs mb-1">STDOUT/STDERR</div>
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				<div class="text-sm">Running...</div>
			</div>
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		{:else if stdout || stderr || result}
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			<div class="bg-[#202123] text-white px-4 py-4 rounded-b-lg">
				<div class=" text-gray-500 text-xs mb-1">STDOUT/STDERR</div>
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				<div class="text-sm">{stdout || stderr || result}</div>
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			</div>
		{/if}
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	</div>
{/if}