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

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Training Load Data Visualization</title>
    <link rel="stylesheet" href="/src/style.css">
</head>

<body>
    <div id="app">
        <header>
            <h1>Training Load Data Visualization</h1>
            <button id="help-button" class="help-button" title="Help">
                <span>?</span>
            </button>
        </header>

        <main>
            <section id="upload-section">
                <h2>Upload Garmin Activities CSV</h2>
                <div class="upload-container">
                    <div class="ftp-input-container">
                        <label for="ftp-input">
                            Functional Threshold Power (FTP)
                        </label>
                        <input type="number" id="ftp-input" value="343" min="0" step="1" placeholder="343" />
                        <span class="ftp-unit">Watts</span>
                    </div>
                    <input type="file" id="csv-upload" accept=".csv" />
                    <label for="csv-upload" class="upload-label">
                        Choose CSV File
                    </label>
                    <div id="upload-status"></div>
                </div>
            </section>

            <section id="filter-section" class="hidden">
                <div class="filter-container" id="filter-container">
                    <!-- Activity type filters will be dynamically generated here -->
                </div>
            </section>

            <section id="charts-section" class="hidden">
                <div class="chart-container">
                    <h2>πŸ—ΊοΈ Distance-based ACWR</h2>
                    <canvas id="distance-chart"></canvas>
                </div>

                <div class="chart-container">
                    <h2>⏱️ Duration-based ACWR</h2>
                    <canvas id="duration-chart"></canvas>
                </div>

                <div class="chart-container">
                    <h2>πŸ”‹ TSS-based ACWR</h2>
                    <canvas id="tss-chart"></canvas>
                </div>

                <div class="legend">
                    <div class="legend-item">
                        <span class="legend-color low"></span>
                        <span>ACWR &lt; 0.8 - Detraining risk</span>
                    </div>
                    <div class="legend-item">
                        <span class="legend-color optimal"></span>
                        <span>ACWR 0.8 - 1.3 - Optimal</span>
                    </div>
                    <div class="legend-item">
                        <span class="legend-color warning"></span>
                        <span>ACWR 1.3 - 1.5 - Warning</span>
                    </div>
                    <div class="legend-item">
                        <span class="legend-color high"></span>
                        <span>ACWR &gt; 1.5 - Injury risk</span>
                    </div>
                </div>
            </section>
        </main>
    </div>

    <div id="help-popover" class="help-popover hidden">
        <div class="help-popover-content">
            <button id="help-close" class="help-close">&times;</button>
            <h2>πŸ“š Glossary</h2>
            <div class="help-section">
                <h3>ACWR - Acute:Chronic Workload Ratio</h3>
                <p>The ratio between your recent training load (acute: last 7 days) and your longer-term training load (chronic: last 28 days). Used to manage training progression and injury risk.</p>
                <ul>
                    <li><strong>&lt; 0.8 (Blue):</strong> Detraining risk - you may be losing fitness</li>
                    <li><strong>0.8 - 1.3 (Green):</strong> Optimal zone - ideal training progression</li>
                    <li><strong>1.3 - 1.5 (Orange):</strong> Warning - pushing the limits</li>
                    <li><strong>&gt; 1.5 (Red):</strong> Injury risk - training load may be too high</li>
                </ul>
            </div>
            <div class="help-section">
                <h3>TSS - Training Stress Score</h3>
                <p>A composite metric that quantifies the overall training stress of a workout, taking into account both intensity (Normalized Power) and duration.</p>
                <p><strong>Formula:</strong> TSS = (Duration Γ— NP Γ— IF) / (FTP Γ— 3600) Γ— 100</p>
            </div>
            <div class="help-section">
                <h3>FTP - Functional Threshold Power</h3>
                <p>The highest average power you can sustain for approximately one hour, measured in watts. Used as a baseline for calculating training intensity and TSS.</p>
            </div>
            <div class="help-section">
                <h3>NP - Normalized Power</h3>
                <p>A power measurement that accounts for the variable nature of your effort during a workout, providing a more accurate representation of the physiological cost than average power.</p>
            </div>
            <div class="help-section">
                <h3>IF - Intensity Factor</h3>
                <p>The ratio of Normalized Power to FTP (IF = NP / FTP). Indicates how hard a workout was relative to your threshold.</p>
            </div>
        </div>
    </div>

    <script type="module" src="/src/main.ts"></script>
</body>

</html>