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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>JavaScript Code Analyzer</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.4.12/ace.js"></script>
    <script src="https://unpkg.com/jshint@2.13.5/dist/jshint.js"></script>
</head>
<body class="bg-gray-100 p-8">
    <div class="container mx-auto">
        <h1 class="text-3xl font-bold mb-6 text-center">
            JavaScript Code Analysis Tool
        </h1>

        <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
            <!-- Code Editor -->
            <div>
                <h2 class="text-xl font-semibold mb-4">Input JavaScript Code</h2>
                <div 
                    id="editor" 
                    class="h-96 border rounded-lg"
                >// Paste your JavaScript code here
function exampleFunction() {
    // Your code goes here
}
                </div>
            </div>

            <!-- Results Panel -->
            <div>
                <h2 class="text-xl font-semibold mb-4">Analysis Results</h2>
                <div 
                    id="analysisResults" 
                    class="bg-white border rounded-lg p-4 h-96 overflow-y-auto"
                >
                    <div id="lintingErrors" class="mb-4">
                        <h3 class="font-bold text-red-600">Linting Errors</h3>
                    </div>
                    <div id="consoleOutput">
                        <h3 class="font-bold text-green-600">Console Output</h3>
                    </div>
                </div>
            </div>
        </div>

        <!-- Action Buttons -->
        <div class="flex justify-center space-x-4 mt-6">
            <button 
                id="lintButton" 
                class="bg-yellow-500 text-white px-6 py-2 rounded hover:bg-yellow-600"
            >
                Lint Code
            </button>
            <button 
                id="runButton" 
                class="bg-blue-500 text-white px-6 py-2 rounded hover:bg-blue-600"
            >
                Run Code
            </button>
            <button 
                id="autoFixButton" 
                class="bg-green-500 text-white px-6 py-2 rounded hover:bg-green-600"
            >
                Auto Fix
            </button>
        </div>
    </div>

    <script>
        const editor = ace.edit("editor");
        editor.setTheme("ace/theme/monokai");
        editor.session.setMode("ace/mode/javascript");
        editor.setOptions({
            enableBasicAutocompletion: true,
            enableSnippets: true,
            enableLiveAutocompletion: true
        });

        document.getElementById('lintButton').addEventListener('click', () => {
            const code = editor.getValue();
            const lintingErrors = document.getElementById('lintingErrors');
            lintingErrors.innerHTML = '<h3 class="font-bold text-red-600">Linting Errors</h3>';

            JSHINT(code, {
                esversion: 6,
                asi: true,
                unused: true,
                globals: {
                    console: true,
                    window: true,
                    document: true
                }
            });

            if (JSHINT.errors.length > 0) {
                JSHINT.errors.forEach((error, index) => {
                    if (error) {
                        const errorEl = document.createElement('div');
                        errorEl.innerHTML = `
                            <span class="text-red-500">Error ${index + 1}:</span> 
                            Line ${error.line}: ${error.reason}
                        `;
                        errorEl.className = 'mt-2 p-2 bg-red-50 rounded';
                        lintingErrors.appendChild(errorEl);
                    }
                });
            } else {
                const successEl = document.createElement('div');
                successEl.textContent = '✅ No linting errors found!';
                successEl.className = 'text-green-600 mt-2';
                lintingErrors.appendChild(successEl);
            }
        });

        document.getElementById('runButton').addEventListener('click', () => {
            const consoleOutput = document.getElementById('consoleOutput');
            consoleOutput.innerHTML = '<h3 class="font-bold text-green-600">Console Output</h3>';

            try {
                const code = editor.getValue();
                
                const originalLog = console.log;
                const logs = [];
                console.log = (...args) => {
                    logs.push(args.map(arg => 
                        typeof arg === 'object' ? JSON.stringify(arg) : arg
                    ).join(' '));
                };

                const runCode = new Function('console', code);
                runCode(console);

                console.log = originalLog;

                logs.forEach(log => {
                    const logEl = document.createElement('div');
                    logEl.textContent = log;
                    consoleOutput.appendChild(logEl);
                });
            } catch (error) {
                const errorEl = document.createElement('div');
                errorEl.innerHTML = `
                    <span class="text-red-500">🚨 Execution Error:</span> 
                    ${error.message}
                `;
                errorEl.className = 'mt-2 p-2 bg-red-50 rounded';
                consoleOutput.appendChild(errorEl);
            }
        });

        document.getElementById('autoFixButton').addEventListener('click', () => {
            const code = editor.getValue();
            const lintingErrors = document.getElementById('lintingErrors');
            lintingErrors.innerHTML = '<h3 class="font-bold text-green-600">Auto-Fix Suggestions</h3>';

            let fixedCode = code;

            // Basic auto-fix strategies
            fixedCode = fixedCode.replace(/([^;])\s*$/gm, '$1;');

            const unclosedStringRegex = /([`'"])[^'"]*$/gm;
            if (unclosedStringRegex.test(fixedCode)) {
                fixedCode = fixedCode.replace(unclosedStringRegex, '$1');
            }

            const undefinedVarRegex = /\b(\w+)\s*=[^;]+;(?!\s*const|\s*let|\s*var)/g;
            fixedCode = fixedCode.replace(undefinedVarRegex, 'let $1 = $&');

            editor.setValue(fixedCode, -1);

            const suggestionsEl = document.createElement('div');
            suggestionsEl.innerHTML = `
                ✅ Auto-Fixed:
                <ul>
                    <li>• Added missing semicolons</li>
                    <li>• Closed unclosed strings</li>
                    <li>• Declared potential undefined variables</li>
                </ul>
            `;
            suggestionsEl.className = 'mt-2 p-2 bg-green-50 rounded';
            lintingErrors.appendChild(suggestionsEl);
        });
    </script>
</body>
</html>