{% extends "layout.html" %}

{% block title %}Market Scanner — IBKR Dashboard{% endblock %}

{% block content %}
<div class="scanner-container">
    <div class="scanner-header">
        <h1 class="scanner-title">Market Scanner</h1>
        <div class="scanner-controls">
            <div class="control-group">
                <label for="scanType">Scan Type</label>
                <select id="scanType">
                    <option value="HOT_BY_VOLUME" selected>Unusual Volume</option>
                    <option value="MOST_ACTIVE">Most Active</option>
                    <option value="TOP_PERC_GAIN">Top Gainers</option>
                    <option value="TOP_PERC_LOSE">Top Losers</option>
                    <option value="HIGH_OPEN_GAP">High Open Gap</option>
                </select>
            </div>
            <div class="control-group">
                <label for="minPrice">Min Price ($)</label>
                <input type="number" id="minPrice" placeholder="e.g. 5.00" step="0.01" min="0">
            </div>
            <div class="control-group">
                <label for="minVolume">Min Volume</label>
                <input type="number" id="minVolume" placeholder="e.g. 100000" step="1000" min="0">
            </div>
            <div class="control-group">
                <label for="minMarketCap">Min Market Cap ($M)</label>
                <input type="number" id="minMarketCap" placeholder="e.g. 100" step="10" min="0">
            </div>
            <div class="control-group">
                <button class="scan-button" id="scanButton" onclick="runScanner()">Run Scan</button>
            </div>
            <div class="control-group">
                <button class="scan-button export-button" id="exportButton" onclick="exportCSV()">Export CSV</button>
            </div>
        </div>
    </div>
    <div class="results-container" id="resultsContainer">
        <div class="results-header">
            <span>Scanner Results</span>
            <span class="results-count" id="resultsCount" style="display:none;">0 results</span>
        </div>
        <div id="scanResults"></div>
    </div>
</div>
{% endblock %}

{% block extra_scripts %}
<script>
    window.addEventListener('DOMContentLoaded', () => {
        runScanner();
    });

    async function runScanner() {
        const button = document.getElementById('scanButton');
        const scanResults = document.getElementById('scanResults');
        const resultsCount = document.getElementById('resultsCount');

        button.disabled = true;
        button.textContent = 'Scanning...';

        scanResults.innerHTML = `
            <div class="loading-state">
                <div class="scanner-spinner"></div>
                <p>Running scanner...</p>
            </div>
        `;
        resultsCount.style.display = 'none';

        try {
            const payload = {
                scan_type: document.getElementById('scanType').value,
                min_price: parseFloat(document.getElementById('minPrice').value) || 0,
                min_volume: parseInt(document.getElementById('minVolume').value) || 0,
                min_market_cap: parseFloat(document.getElementById('minMarketCap').value) || 0,
            };

            const response = await fetch('/scanner', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(payload),
            });

            const data = await response.json();

            if (data.status === 'ok') {
                displayScanResults(data.results, payload.scan_type);
            } else {
                showError(data.message || 'Scanner request failed');
            }
        } catch (err) {
            showError('Network error: ' + err.message);
        } finally {
            button.disabled = false;
            button.textContent = 'Run Scan';
        }
    }

    function displayScanResults(results, scanType) {
        const scanResults = document.getElementById('scanResults');
        const resultsCount = document.getElementById('resultsCount');

        resultsCount.textContent = `${results.length} result${results.length !== 1 ? 's' : ''}`;
        resultsCount.style.display = 'inline-block';

        if (results.length === 0) {
            scanResults.innerHTML = '<div class="loading-state"><p>No results found. Try adjusting your filters.</p></div>';
            return;
        }

        const grid = document.createElement('div');
        grid.className = 'results-grid';

        results.forEach((result) => {
            const card = document.createElement('div');
            card.className = 'result-card';
            card.onclick = () => loadSymbolFromScan(result.symbol);

            card.innerHTML = `
                <img
                    class="chart-thumbnail"
                    src="${result.chart_image}"
                    alt="${result.symbol} chart"
                    onerror="handleChartError(this, '${result.symbol}')"
                >
                <div class="symbol-details">
                    <div class="symbol-name">${result.symbol}</div>
                    <div class="symbol-company">${result.company}</div>
                    <div class="symbol-exchange">${result.exchange || ''}</div>
                </div>
            `;

            grid.appendChild(card);
        });

        scanResults.innerHTML = '';
        scanResults.appendChild(grid);
    }

    function loadSymbolFromScan(symbol) {
        window.location.href = '/?symbol=' + symbol;
    }

    function formatVolume(volume) {
        if (!volume) return '';
        if (volume >= 1_000_000) return (volume / 1_000_000).toFixed(1) + 'M';
        if (volume >= 1_000) return (volume / 1_000).toFixed(1) + 'K';
        return volume.toString();
    }

    function handleChartError(imgElement, symbol) {
        imgElement.style.display = 'none';
        const placeholder = document.createElement('div');
        placeholder.className = 'chart-placeholder';
        placeholder.textContent = symbol;
        imgElement.parentNode.insertBefore(placeholder, imgElement);
    }

    function showError(message) {
        const scanResults = document.getElementById('scanResults');
        scanResults.innerHTML = `
            <div class="loading-state">
                <p style="color: #e74c3c;">Error: ${message}</p>
            </div>
        `;
    }

    async function exportCSV() {
        const button = document.getElementById('exportButton');
        button.disabled = true;
        button.textContent = 'Exporting...';

        try {
            const payload = {
                scan_type: document.getElementById('scanType').value,
                min_price: parseFloat(document.getElementById('minPrice').value) || 0,
                min_volume: parseInt(document.getElementById('minVolume').value) || 0,
                min_market_cap: parseFloat(document.getElementById('minMarketCap').value) || 0,
            };

            const response = await fetch('/scanner/export', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(payload),
            });

            if (!response.ok) {
                showError('Export failed');
                return;
            }

            const blob = await response.blob();
            const disposition = response.headers.get('Content-Disposition') || '';
            const filenameMatch = disposition.match(/filename=([^\s;]+)/);
            const filename = filenameMatch ? filenameMatch[1] : 'scanner_export.csv';

            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = filename;
            document.body.appendChild(a);
            a.click();
            document.body.removeChild(a);
            URL.revokeObjectURL(url);
        } catch (err) {
            showError('Export error: ' + err.message);
        } finally {
            button.disabled = false;
            button.textContent = 'Export CSV';
        }
    }
</script>
{% endblock %}