{% extends "base.html" %}
{% block title %}Executive Dashboard - ICDEV™{% endblock %}
{% block content %}
<div class="container">
    <nav aria-label="breadcrumb" style="margin-bottom:0.5rem;">
        <span><a href="/" style="color:#1976d2;text-decoration:none;">Home</a></span>
        <span style="color:#999;"> &gt; </span>
        <span style="color:#333;">Executive Dashboard</span>
    </nav>

    <h1>Executive Migration Dashboard</h1>
    <p class="text-muted">High-level migration progress metrics, strategy overview, and program health.</p>

    <!-- KPI Row -->
    <div style="display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin:1.5rem 0;">
        <div style="padding:1rem;border:1px solid #ddd;border-radius:8px;text-align:center;background:linear-gradient(135deg,#e3f2fd 0%,#fff 100%);">
            <div id="kpi-plans" style="font-size:2rem;font-weight:bold;color:#1565c0;">—</div>
            <div style="color:#666;font-size:0.85rem;">Total Plans</div>
        </div>
        <div style="padding:1rem;border:1px solid #ddd;border-radius:8px;text-align:center;background:linear-gradient(135deg,#e8f5e9 0%,#fff 100%);">
            <div id="kpi-active" style="font-size:2rem;font-weight:bold;color:#2e7d32;">—</div>
            <div style="color:#666;font-size:0.85rem;">Active Plans</div>
        </div>
        <div style="padding:1rem;border:1px solid #ddd;border-radius:8px;text-align:center;background:linear-gradient(135deg,#fff3e0 0%,#fff 100%);">
            <div id="kpi-completion" style="font-size:2rem;font-weight:bold;color:#ef6c00;">—</div>
            <div style="color:#666;font-size:0.85rem;">Completion %</div>
        </div>
        <div style="padding:1rem;border:1px solid #ddd;border-radius:8px;text-align:center;background:linear-gradient(135deg,#fce4ec 0%,#fff 100%);">
            <div id="kpi-ato" style="font-size:2rem;font-weight:bold;color:#c62828;">—</div>
            <div style="color:#666;font-size:0.85rem;">ATO High/Critical</div>
        </div>
        <div style="padding:1rem;border:1px solid #ddd;border-radius:8px;text-align:center;background:linear-gradient(135deg,#f3e5f5 0%,#fff 100%);">
            <div id="kpi-risk" style="font-size:2rem;font-weight:bold;color:#6a1b9a;">—</div>
            <div style="color:#666;font-size:0.85rem;">Avg Risk</div>
        </div>
        <div style="padding:1rem;border:1px solid #ddd;border-radius:8px;text-align:center;background:linear-gradient(135deg,#e0f7fa 0%,#fff 100%);">
            <div id="kpi-hours" style="font-size:2rem;font-weight:bold;color:#00838f;">—</div>
            <div style="color:#666;font-size:0.85rem;">Est. Hours</div>
        </div>
    </div>

    <!-- Strategy Distribution -->
    <div style="margin:1.5rem 0;padding:1.25rem;border:1px solid #ddd;border-radius:8px;">
        <h2 style="margin:0 0 1rem;font-size:1.15rem;">7R Strategy Distribution</h2>
        <div id="strategy-chart" style="display:flex;flex-direction:column;gap:0.6rem;"></div>
    </div>

    <!-- Plans Status -->
    <div style="margin:1.5rem 0;padding:1.25rem;border:1px solid #ddd;border-radius:8px;">
        <h2 style="margin:0 0 1rem;font-size:1.15rem;">Plans by Status</h2>
        <div id="plans-status-chart" style="display:flex;gap:1rem;flex-wrap:wrap;"></div>
    </div>

    <!-- Monthly Trend -->
    <div style="margin:1.5rem 0;padding:1.25rem;border:1px solid #ddd;border-radius:8px;">
        <h2 style="margin:0 0 1rem;font-size:1.15rem;">Monthly Migration Trend</h2>
        <div id="monthly-trend-chart" style="display:flex;align-items:flex-end;gap:0.5rem;height:180px;padding:0.5rem;border:1px solid #eee;border-radius:4px;background:#fafafa;"></div>
    </div>

    <!-- Active Plans Table -->
    <div style="margin:1.5rem 0;">
        <h2 style="font-size:1.15rem;">Active Migration Plans</h2>
        <div style="overflow-x:auto;">
            <table id="plans-table" style="width:100%;border-collapse:collapse;font-size:0.9rem;">
                <thead>
                    <tr style="background:#f5f5f5;border-bottom:2px solid #ddd;">
                        <th style="padding:0.6rem 0.75rem;text-align:left;">Plan</th>
                        <th style="padding:0.6rem 0.75rem;text-align:left;">Status</th>
                        <th style="padding:0.6rem 0.75rem;text-align:right;">Tasks</th>
                        <th style="padding:0.6rem 0.75rem;text-align:right;">Progress</th>
                        <th style="padding:0.6rem 0.75rem;text-align:left;">Target</th>
                    </tr>
                </thead>
                <tbody id="plans-body"></tbody>
            </table>
        </div>
        <div id="plans-empty" style="display:none;padding:2rem;text-align:center;color:#999;">No active migration plans.</div>
    </div>
</div>

<script>
const STRATEGY_COLORS = {
    'rehost': '#42a5f5',
    'replatform': '#66bb6a',
    'refactor': '#ab47bc',
    'rearchitect': '#ef5350',
    'repurchase': '#ff7043',
    'retire': '#78909c',
    'retain': '#8d6e63'
};
const STATUS_COLORS = {
    'draft': '#9e9e9e',
    'approved': '#1976d2',
    'in_progress': '#ff9800',
    'completed': '#4caf50',
    'paused': '#fbc02d',
    'cancelled': '#d32f2f'
};

async function loadSummary() {
    try {
        const resp = await fetch('/api/executive/migration-summary');
        if (!resp.ok) throw new Error('Summary fetch failed');
        const d = await resp.json();
        const s = d.data || d;
        document.getElementById('kpi-plans').textContent = s.total_plans ?? 0;
        document.getElementById('kpi-active').textContent = s.active_plans ?? 0;
        document.getElementById('kpi-completion').textContent = (s.completion_pct != null ? s.completion_pct + '%' : '0%');
        document.getElementById('kpi-ato').textContent = s.ato_high_critical ?? 0;
        document.getElementById('kpi-risk').textContent = s.avg_risk_score ?? '—';
        document.getElementById('kpi-hours').textContent = s.total_estimated_hours != null ? s.total_estimated_hours.toLocaleString() : '—';

        if (s.strategy_distribution) renderStrategyChart(s.strategy_distribution);
        if (s.plans_by_status) renderPlansStatus(s.plans_by_status);
        if (s.monthly_trend) renderMonthlyTrend(s.monthly_trend);
    } catch (e) { console.warn('Summary load error:', e); }
}

function renderStrategyChart(dist) {
    const container = document.getElementById('strategy-chart');
    const strategies = ['rehost','replatform','refactor','rearchitect','repurchase','retire','retain'];
    const maxVal = Math.max(1, ...strategies.map(s => dist[s] || 0));
    container.innerHTML = strategies.map(s => {
        const count = dist[s] || 0;
        const pct = (count / maxVal * 100).toFixed(1);
        const color = STRATEGY_COLORS[s] || '#999';
        return `<div style="display:flex;align-items:center;gap:0.75rem;">
            <span style="min-width:100px;font-size:0.85rem;font-weight:600;text-transform:capitalize;">${s}</span>
            <div style="flex:1;background:#f0f0f0;border-radius:4px;height:24px;overflow:hidden;">
                <div style="width:${pct}%;background:${color};height:100%;border-radius:4px;min-width:${count>0?'2px':'0'};transition:width 0.3s;"></div>
            </div>
            <span style="min-width:32px;text-align:right;font-size:0.85rem;font-weight:600;">${count}</span>
        </div>`;
    }).join('');
}

function renderPlansStatus(dist) {
    const container = document.getElementById('plans-status-chart');
    const statuses = Object.keys(dist);
    if (!statuses.length) { container.innerHTML = '<span style="color:#999;">No data</span>'; return; }
    container.innerHTML = statuses.map(st => {
        const count = dist[st];
        const color = STATUS_COLORS[st] || '#999';
        return `<div style="flex:1;min-width:100px;padding:0.75rem;border-radius:8px;text-align:center;border:2px solid ${color};background:${color}18;">
            <div style="font-size:1.5rem;font-weight:bold;color:${color};">${count}</div>
            <div style="font-size:0.8rem;font-weight:600;text-transform:uppercase;color:${color};">${st.replace('_',' ')}</div>
        </div>`;
    }).join('');
}

function renderMonthlyTrend(trend) {
    const container = document.getElementById('monthly-trend-chart');
    if (!trend || !trend.length) { container.innerHTML = '<span style="color:#999;">No trend data</span>'; return; }
    const maxVal = Math.max(1, ...trend.map(t => t.plans || 0));
    container.innerHTML = trend.slice().reverse().map(t => {
        const h = (t.plans / maxVal * 100).toFixed(1);
        return `<div style="flex:1;display:flex;flex-direction:column;align-items:center;gap:0.25rem;">
            <div style="width:100%;background:#e3f2fd;border-radius:4px;min-height:4px;flex:1;display:flex;align-items:flex-end;overflow:hidden;">
                <div style="width:100%;background:#1976d2;height:${h}%;border-radius:4px;transition:height 0.3s;"></div>
            </div>
            <span style="font-size:0.65rem;color:#666;white-space:nowrap;">${t.month || ''}</span>
        </div>`;
    }).join('');
}

async function loadTrend() {
    try {
        const resp = await fetch('/api/executive/migration-trend');
        if (!resp.ok) throw new Error('Trend fetch failed');
        const d = await resp.json();
        const plans = (d.data || d).plans || [];
        renderPlansTable(plans);
    } catch (e) { console.warn('Trend load error:', e); }
}

function renderPlansTable(plans) {
    const tbody = document.getElementById('plans-body');
    const empty = document.getElementById('plans-empty');
    const active = plans.filter(p => p.status === 'in_progress' || p.status === 'approved');
    if (!active.length) { tbody.innerHTML = ''; empty.style.display = 'block'; return; }
    empty.style.display = 'none';
    tbody.innerHTML = active.map(p => {
        const total = p.total_tasks || 0;
        const done = p.completed_tasks || 0;
        const pct = total > 0 ? ((done/total)*100).toFixed(0) : 0;
        const color = STATUS_COLORS[p.status] || '#999';
        return `<tr style="border-bottom:1px solid #eee;">
            <td style="padding:0.5rem 0.75rem;font-weight:600;">${esc(p.name || '—')}</td>
            <td style="padding:0.5rem 0.75rem;"><span style="display:inline-block;padding:0.15rem 0.6rem;border-radius:12px;font-size:0.8rem;font-weight:600;color:#fff;background:${color};">${esc(p.status ? p.status.replace('_',' ') : '—')}</span></td>
            <td style="padding:0.5rem 0.75rem;text-align:right;">${done}/${total}</td>
            <td style="padding:0.5rem 0.75rem;text-align:right;font-weight:600;">${pct}%</td>
            <td style="padding:0.5rem 0.75rem;">${esc(p.target_date || '—')}</td>
        </tr>`;
    }).join('');
}

function esc(s) { if (s == null) return ''; const el = document.createElement('span'); el.textContent = String(s); return el.innerHTML; }

async function init() { await Promise.all([loadSummary(), loadTrend()]); }
init();
</script>
{% endblock %}