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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Sentiment Analysis - Hugging Face Transformers.js</title>

    <script type="module">
        // Import the library
        import { pipeline } from 'https://cdn.jsdelivr.net/npm/@xenova/[email protected]';

        // Make it available globally
        window.pipeline = pipeline;
    </script>

    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">

    <link rel="stylesheet" href="css/styles.css">
</head>

<body>
    <div class="container-main">
        
        <!-- Back to Home button -->
        <div class="row mt-5">
            <div class="col-md-12 text-center">
                <a href="index.html" class="btn btn-outline-secondary"
                    style="color: #3c650b; border-color: #3c650b;">Back to Main Page</a>
            </div>
        </div>

        <!-- Content -->
        <div class="container mt-5">
            <!-- Centered Titles -->
            <div class="text-center">
                <h2>Natural Language Processing</h2>
                <h4>Sentiment Analysis (Text Classification)</h4>
            </div>

            <!-- Actual Content of this page -->
            <div id="sentiment-analyzer-container" class="container mt-4">
                <h5>Single Input:</h5>
                <div class="d-flex align-items-center">
                    <label for="sentimentText" class="mb-0 text-nowrap" style="margin-right: 15px;">Enter Text to
                        Analyze:</label>
                    <input type="text" class="form-control flex-grow-1" id="sentimentText" value="I love transformers!"
                        placeholder="Enter text" style="margin-right: 15px; margin-left: 15px;">
                    <button id="analyzeButton" class="btn btn-primary" onclick="analyzeSentiment()">Analyze</button>
                </div>
                <div class="mt-4">
                    <h4>Output:</h4>
                    <pre id="outputArea"></pre>
                </div>
            </div>

            <hr> <!-- Line Separator -->

            <div id="sentiment-analyzer-container2" class="container mt-4">
                <h5>Multiple Inputs:</h5>
                <div class="d-flex align-items-center mb-2">
                    <label for="sentimentText1" class="mb-0 text-nowrap" style="margin-right: 15px;">Enter Text to
                        Analyze 1:</label>
                    <input type="text" class="form-control flex-grow-1" id="sentimentText1" value="I love transformers!"
                        placeholder="Enter text" style="margin-right: 15px; margin-left: 15px;">
                </div>
                <div class="d-flex align-items-center">
                    <label for="sentimentText2" class="mb-0 text-nowrap" style="margin-right: 15px;">Enter Text to
                        Analyze 2:</label>
                    <input type="text" class="form-control flex-grow-1" id="sentimentText2" value="I hate transformers!"
                        placeholder="Enter text" style="margin-right: 15px; margin-left: 15px;">
                    <button id="analyzeButton" class="btn btn-primary ml-2"
                        onclick="analyzeSentimentMulti()">Analyze</button>
                </div>
                <div class="mt-4">
                    <h4>Output:</h4>
                    <pre id="outputArea2"></pre>
                </div>
            </div>

            <hr> <!-- Line Separator -->

            <!-- Toxic Comment Classification -->
            <div id="toxic-container" class="container mt-4">
                <h5>Toxic Comment Classification (Return All Classes):</h5>
                <div class="d-flex align-items-center">
                    <label for="toxicText" class="mb-0 text-nowrap" style="margin-right: 15px;">Enter Toxic
                        Text:</label>
                    <input type="text" class="form-control flex-grow-1" id="toxicText" value="I hate you!"
                        placeholder="Enter text" style="margin-right: 15px; margin-left: 15px;">
                    <button id="toxicButton" class="btn btn-primary" onclick="toxicReview()">Review</button>
                </div>
                <div class="mt-4">
                    <h4>Output:</h4>
                    <pre id="toxicOutputArea"></pre>
                </div>
            </div>

            <!-- Back to Home button -->
            <div class="row mt-5">
                <div class="col-md-12 text-center">
                    <a href="index.html" class="btn btn-outline-secondary"
                        style="color: #3c650b; border-color: #3c650b;">Back to Main Page</a>
                </div>
            </div>
        </div>
    </div>

    <script>

        let sentimentAnalysis;
        let reviewer;
        let toxic_classifier;

        // Initialize the sentiment analysis model
        async function initializeModel() {
            sentimentAnalysis = await pipeline('sentiment-analysis', 'Xenova/distilbert-base-uncased-finetuned-sst-2-english');
            toxic_classifier = await pipeline('text-classification', 'Xenova/toxic-bert');
        }

        async function analyzeSentiment() {
            const textFieldValue = document.getElementById("sentimentText").value.trim();

            const result = await sentimentAnalysis(textFieldValue);

            document.getElementById("outputArea").innerText = JSON.stringify(result[0]['label'], null, 2); //result[0]["label"]
        }

        async function analyzeSentimentMulti() {
            const textFieldValue1 = document.getElementById("sentimentText1").value.trim();
            const textFieldValue2 = document.getElementById("sentimentText2").value.trim();

            const result = await sentimentAnalysis([textFieldValue1, textFieldValue2]);

            document.getElementById("outputArea2").innerText = JSON.stringify(result, null, 2);
        }


        async function toxicReview() {

            const textFieldValue = document.getElementById("toxicText").value.trim();

            const result = await toxic_classifier(textFieldValue, { topk: null });

            document.getElementById("toxicOutputArea").innerText = JSON.stringify(result, null, 2);

        }

        // Initialize the model after the DOM is completely loaded
        window.addEventListener("DOMContentLoaded", initializeModel);
    </script>
</body>

</html>