{% extends 'base.html' %}
{% load static mathfilters %}

{% block imports %}
<script src="{% static 'js/utils.js' %}"></script>
<script src="{% static 'js/chart.js' %}"></script>
<script src="{% static 'js/chartjs-plugin-datalabels.min.js' %}"></script>
{% endblock %}

{% block content %}
<!-- MAIN DASHBOARD -->
<div class="p-4 space-y-4">
    <!-- QUICK STATS ROW -->
    <div class="grid grid-cols-1 lg:grid-cols-3 gap-4">
        <!-- CPU Utilization -->
        <div class="card bg-base-100 shadow-sm hover:shadow transition-shadow">
            <div class="card-body p-4">
                <div class="flex items-center justify-between mb-3">
                    <div>
                        <h3 class="text-sm font-medium text-base-content/70">CPU Utilization</h3>
                        <div class="text-xs text-base-content/40 mt-0.5">{{ cpu_used }} / {{ cpu_used|add:cpu_free }} vCPU</div>
                    </div>
                    <div class="text-lg font-bold text-primary">{{ cpu_used_percentage|floatformat:1 }}%</div>
                </div>
                <div class="space-y-2">
                    <div class="flex justify-between text-xs">
                        <span class="text-base-content/60">Used</span>
                        <span class="font-medium">{{ cpu_used }} vCPU</span>
                    </div>
                    <progress class="progress progress-primary w-full" value="{{ cpu_used_percentage }}" max="100"></progress>
                    <div class="flex justify-between text-xs">
                        <span class="text-base-content/60">Free</span>
                        <span class="font-medium">{{ cpu_free }} vCPU</span>
                    </div>
                </div>
            </div>
        </div>

        <!-- RAM Utilization -->
        <div class="card bg-base-100 shadow-sm hover:shadow transition-shadow">
            <div class="card-body p-4">
                <div class="flex items-center justify-between mb-3">
                    <div>
                        <h3 class="text-sm font-medium text-base-content/70">RAM Utilization</h3>
                        <div class="text-xs text-base-content/40 mt-0.5">{{ ram_used }} / {{ ram_used|add:ram_free }} GB</div>
                    </div>
                    <div class="text-lg font-bold text-secondary">{{ ram_used_percentage|floatformat:1 }}%</div>
                </div>
                <div class="space-y-2">
                    <div class="flex justify-between text-xs">
                        <span class="text-base-content/60">Used</span>
                        <span class="font-medium">{{ ram_used }} GB</span>
                    </div>
                    <progress class="progress progress-secondary w-full" value="{{ ram_used_percentage }}" max="100"></progress>
                    <div class="flex justify-between text-xs">
                        <span class="text-base-content/60">Free</span>
                        <span class="font-medium">{{ ram_free }} GB</span>
                    </div>
                </div>
            </div>
        </div>

        <!-- Instance Summary -->
        <div class="card bg-base-100 shadow-sm hover:shadow transition-shadow">
            <div class="card-body p-4">
                <div class="flex items-center justify-between mb-3">
                    <div>
                        <h3 class="text-sm font-medium text-base-content/70">Instances</h3>
                        <div class="text-xs text-base-content/40 mt-0.5">{{ vm_active }} active / {{ vm_stopped }} stopped</div>
                    </div>
                    <div class="text-lg font-bold text-accent">{{ vm_count }}</div>
                </div>
                <div class="space-y-3">
                    <div class="flex justify-between items-center text-xs">
                        <div class="flex items-center gap-2">
                            <div class="w-2 h-2 rounded-full bg-success"></div>
                            <span>Most Used Flavor</span>
                        </div>
                        <span class="font-medium">{{ common_flavor }}</span>
                    </div>
                    <div class="flex justify-between items-center text-xs">
                        <div class="flex items-center gap-2">
                            <div class="w-2 h-2 rounded-full bg-info"></div>
                            <span>Avg. vCPU/VM</span>
                        </div>
                        <span class="font-medium">{{ avg_cpu_per_vm|floatformat:1 }}</span>
                    </div>
                    <div class="flex justify-between items-center text-xs">
                        <div class="flex items-center gap-2">
                            <div class="w-2 h-2 rounded-full bg-warning"></div>
                            <span>Density</span>
                        </div>
                        <span class="font-medium">{{ vm_density|floatformat:1 }}/host</span>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- DETAILED OVERVIEW -->
    <div class="grid grid-cols-1 lg:grid-cols-2 gap-4">
        <!-- Resource Allocation -->
        <div class="card bg-base-100 shadow-sm">
            <div class="card-body p-4">
                <h3 class="text-sm font-semibold mb-4 flex items-center gap-2">
                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 19v-6a2 2 0 00-2-2H5a2 2 0 00-2 2v6a2 2 0 002 2h2a2 2 0 002-2zm0 0V9a2 2 0 012-2h2a2 2 0 012 2v10m-6 0a2 2 0 002 2h2a2 2 0 002-2m0 0V5a2 2 0 012-2h2a2 2 0 012 2v14a2 2 0 01-2 2h-2a2 2 0 01-2-2z"/>
                    </svg>
                    Resource Allocation
                </h3>
                
                <!-- CPU Allocation -->
                <div class="mb-4">
                    <div class="flex justify-between text-xs mb-1">
                        <span class="text-base-content/70">CPU Allocation</span>
                        <span class="font-medium">{{ cpu_allocated }} / {{ cpu_total }} vCPU</span>
                    </div>
                    {% with pct=cpu_allocated|div:cpu_total|mul:100 %}
                    <div class="flex items-center gap-2">
                        <progress class="progress progress-primary flex-1" value="{{ pct }}" max="100"></progress>
                        <span class="text-xs font-medium w-12 text-right">{{ pct|floatformat:1 }}%</span>
                    </div>
                    <div class="flex justify-between text-xs mt-1">
                        <span class="text-base-content/50">OC: x{{ cpu_overcommit_ratio }}</span>
                        <span class="text-base-content/50">{{ pct|floatformat:1 }}% allocated</span>
                    </div>
                    {% endwith %}
                </div>

                <!-- RAM Allocation -->
                <div>
                    <div class="flex justify-between text-xs mb-1">
                        <span class="text-base-content/70">RAM Allocation</span>
                        <span class="font-medium">{{ ram_allocated }} / {{ ram_total }} GB</span>
                    </div>
                    {% with pct=ram_allocated|div:ram_total|mul:100 %}
                    <div class="flex items-center gap-2">
                        <progress class="progress progress-secondary flex-1" value="{{ pct }}" max="100"></progress>
                        <span class="text-xs font-medium w-12 text-right">{{ pct|floatformat:1 }}%</span>
                    </div>
                    <div class="flex justify-between text-xs mt-1">
                        <span class="text-base-content/50">OC: x{{ ram_overcommit_ratio }}</span>
                        <span class="text-base-content/50">{{ pct|floatformat:1 }}% allocated</span>
                    </div>
                    {% endwith %}
                </div>
            </div>
        </div>

        <!-- Flavor Distribution -->
        <div class="card bg-base-100 shadow-sm">
            <div class="card-body p-4">
                <h3 class="text-sm font-semibold mb-4 flex items-center gap-2">
                    <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M11 3.055A9.001 9.001 0 1020.945 13H11V3.055z"/>
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M20.488 9H15V3.512A9.025 9.025 0 0120.488 9z"/>
                    </svg>
                    Top Flavors
                </h3>
                
                <div class="space-y-3">
                    <!-- Most Common -->
                    <div class="bg-base-200/50 rounded-lg p-3">
                        <div class="flex justify-between items-center mb-1">
                            <span class="text-sm font-medium">{{ common_flavor }}</span>
                            <span class="text-xs badge badge-primary">{{ common_flavor_count }} instances</span>
                        </div>
                        <div class="flex justify-between text-xs">
                            <span class="text-base-content/60">Share</span>
                            <span class="font-medium">{{ common_flavor_count|div:vm_count|mul:100|floatformat:0 }}%</span>
                        </div>
                    </div>

                    <!-- Other Flavors -->
                    <div class="space-y-2">
                        {% if second_common_flavor %}
                        <div class="flex justify-between items-center text-sm">
                            <div class="flex items-center gap-2">
                                <div class="w-1.5 h-1.5 rounded-full bg-base-content/30"></div>
                                <span>{{ second_common_flavor.name }}</span>
                            </div>
                            <span class="text-xs badge badge-outline">{{ second_common_flavor.count }}</span>
                        </div>
                        {% endif %}
                        
                        {% if third_common_flavor %}
                        <div class="flex justify-between items-center text-sm">
                            <div class="flex items-center gap-2">
                                <div class="w-1.5 h-1.5 rounded-full bg-base-content/30"></div>
                                <span>{{ third_common_flavor.name }}</span>
                            </div>
                            <span class="text-xs badge badge-outline">{{ third_common_flavor.count }}</span>
                        </div>
                        {% endif %}
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- AUDIT CONTROL -->
    <div class="card bg-base-100 shadow-sm">
        <div class="card-body p-4">
            <div class="flex flex-col sm:flex-row sm:items-center justify-between gap-3 mb-4">
                <div>
                    <h3 class="text-sm font-semibold">Audit Analysis</h3>
                    <div class="text-xs text-base-content/50 mt-0.5">Select an audit to analyze resource distribution</div>
                </div>
                <div class="flex items-center gap-2">
                    <span class="text-xs text-base-content/50">{{ audits|length }} available</span>
                    <div class="dropdown dropdown-end">
                        <label tabindex="0" class="btn btn-xs btn-ghost">
                            <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"/>
                            </svg>
                            Info
                        </label>
                        <div tabindex="0" class="dropdown-content z-[1] card card-compact w-64 p-2 shadow bg-base-100">
                            <div class="card-body">
                                <div class="text-xs space-y-1">
                                    <div class="flex justify-between">
                                        <span class="text-base-content/60">Strategy:</span>
                                        <span id="previewStrategy">Balanced</span>
                                    </div>
                                    <div class="flex justify-between">
                                        <span class="text-base-content/60">Scope:</span>
                                        <span id="previewScope">Full Cluster</span>
                                    </div>
                                    <div class="flex justify-between">
                                        <span class="text-base-content/60">CPU Weight:</span>
                                        <span id="previewCpu">1.0</span>
                                    </div>
                                    <div class="flex justify-between">
                                        <span class="text-base-content/60">RAM Weight:</span>
                                        <span id="previewRam">1.0</span>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <div class="flex flex-col md:flex-row gap-3">
                <select id="auditSelector" class="select select-bordered select-sm flex-1">
                    {% for audit in audits %}
                    <option value="{{ audit.id }}" 
                            data-cpu="{{ audit.cpu_weight }}"
                            data-ram="{{ audit.ram_weight }}"
                            data-scope="{{ audit.scope }}"
                            data-strategy="{{ audit.strategy }}"
                            data-goal="{{ audit.goal }}">
                        {{ audit.name }} ({{ audit.created_at|date:"M d" }})
                    </option>
                    {% endfor %}
                </select>
                <button onclick="loadSelectedAudit()" class="btn btn-primary btn-sm">
                    Load Analysis
                </button>
            </div>
        </div>
    </div>

    <!-- ANALYSIS VISUALIZATION -->
    <div class="grid grid-cols-1 lg:grid-cols-2 gap-4">
        <!-- Current State -->
        <div class="card bg-base-100 shadow-sm">
            <div class="card-body p-4">
                <h3 class="text-sm font-semibold mb-4">Current CPU Distribution</h3>
                <div class="h-48">
                    <canvas id="cpuHostChart"></canvas>
                </div>
                <div class="flex items-center justify-center gap-3 mt-3">
                    <div class="flex items-center gap-1 text-xs">
                        <div class="w-3 h-0.5 bg-success"></div>
                        <span class="text-success">Mean: <span id="currentCpuMean">0</span>%</span>
                    </div>
                </div>
            </div>
        </div>

        <!-- Projected State -->
        <div class="card bg-base-100 shadow-sm">
            <div class="card-body p-4">
                <h3 class="text-sm font-semibold mb-4">Projected CPU Distribution</h3>
                <div class="h-48">
                    <canvas id="cpuProjectedChart"></canvas>
                </div>
                <div class="flex items-center justify-center gap-4 mt-3">
                    <div class="flex items-center gap-1 text-xs">
                        <div class="w-3 h-0.5 bg-success"></div>
                        <span class="text-success">Mean: <span id="projectedCpuMean">0</span>%</span>
                    </div>
                    <div class="flex items-center gap-1 text-xs">
                        <div class="w-3 h-0.5 bg-error/60"></div>
                        <span class="text-error/60">±1σ: <span id="projectedCpuStd">0</span>%</span>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- MIGRATION ACTIONS -->
    <div class="card bg-base-100 shadow-sm">
        <div class="card-body p-4">
            <div class="flex items-center justify-between mb-4">
                <h3 class="text-sm font-semibold">Migration Actions</h3>
                <div class="badge badge-neutral badge-sm" id="migrationCount">Select audit</div>
            </div>
            
            <div class="overflow-x-auto">
                <table class="table table-zebra table-sm">
                    <thead>
                        <tr class="bg-base-200">
                            <th class="text-xs font-medium">Instance</th>
                            <th class="text-xs font-medium">Source → Destination</th>
                            <th class="text-xs font-medium">Flavor</th>
                            <th class="text-xs font-medium">Impact</th>
                        </tr>
                    </thead>
                    <tbody id="migrationTableBody" class="text-sm">
                        <tr>
                            <td colspan="4" class="text-center py-6 text-base-content/40">
                                No audit selected. Load an audit to view migration recommendations.
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block script %}
<script>
    // Update audit preview
    document.getElementById('auditSelector').addEventListener('change', function(e) {
        const option = this.options[this.selectedIndex];
        document.getElementById('previewCpu').textContent = option.dataset.cpu || '1.0';
        document.getElementById('previewRam').textContent = option.dataset.ram || '1.0';
        document.getElementById('previewScope').textContent = option.dataset.scope || 'Full Cluster';
        document.getElementById('previewStrategy').textContent = option.dataset.strategy || 'Balanced';
    });

    // Audit data
    const auditData = {
        {% for audit in audits %}
        "{{ audit.id }}": {
            name: "{{ audit.name }}",
            migrations: {{ audit.migrations|safe }},
            hostData: {
                labels: {{ audit.host_labels|safe }},
                current: {{ audit.cpu_current|safe }},
                projected: {{ audit.cpu_projected|safe }}
            }
        }{% if not forloop.last %},{% endif %}
        {% endfor %}
    };

    // Chart instances
    let cpuHostChart = null;
    let cpuProjectedChart = null;

    // Load selected audit
    function loadSelectedAudit() {
        const auditId = document.getElementById('auditSelector').value;
        updateMigrationTable(auditId);
        updateCPUCharts(auditId);
    }

    // Update migration table
    function updateMigrationTable(auditId) {
        const tbody = document.getElementById('migrationTableBody');
        const migrationCount = document.getElementById('migrationCount');
        const data = auditData[auditId];
        
        if (!data || !data.migrations || data.migrations.length === 0) {
            tbody.innerHTML = `
                <tr>
                    <td colspan="4" class="text-center py-6 text-base-content/40">
                        No migration actions recommended
                    </td>
                </tr>
            `;
            migrationCount.textContent = '0 actions';
            return;
        }
        
        let html = '';
        data.migrations.forEach(migration => {
            const impact = migration.impact || 'Low';
            const impactClass = {
                'Low': 'badge-success',
                'Medium': 'badge-warning',
                'High': 'badge-error'
            }[impact] || 'badge-neutral';
            
            html += `
                <tr>
                    <td class="font-medium">
                        <div>${migration.instanceName}</div>
                    </td>
                    <td>
                        <div class="flex items-center gap-2">
                            <span class="badge badge-outline badge-xs">${migration.source}</span>
                            <svg class="w-3 h-3 text-base-content/30" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 7l5 5m0 0l-5 5m5-5H6"/>
                            </svg>
                            <span class="badge badge-primary badge-outline badge-xs">${migration.destination}</span>
                        </div>
                    </td>
                    <td>
                        <code class="text-xs bg-base-200 px-2 py-1 rounded">${migration.flavor}</code>
                    </td>
                    <td>
                        <span class="badge ${impactClass} badge-xs">${impact}</span>
                    </td>
                </tr>
            `;
        });
        
        tbody.innerHTML = html;
        migrationCount.textContent = `${data.migrations.length} action${data.migrations.length !== 1 ? 's' : ''}`;
    }

    // Update CPU charts
    function updateCPUCharts(auditId) {
        const data = auditData[auditId];
        if (!data || !data.hostData) return;
        
        const currentCtx = document.getElementById('cpuHostChart').getContext('2d');
        const projectedCtx = document.getElementById('cpuProjectedChart').getContext('2d');
        
        // Calculate statistics
        const currentStats = calculateStats(data.hostData.current);
        const projectedStats = calculateStats(data.hostData.projected);
        
        // Update stats displays
        document.getElementById('currentCpuMean').textContent = currentStats.mean.toFixed(1);
        document.getElementById('projectedCpuMean').textContent = projectedStats.mean.toFixed(1);
        document.getElementById('projectedCpuStd').textContent = projectedStats.std.toFixed(1);
        
        // Destroy existing charts
        if (cpuHostChart) cpuHostChart.destroy();
        if (cpuProjectedChart) cpuProjectedChart.destroy();
        
        // Chart colors
        const colors = {
            primary: getCSSVar('--color-primary'),
            secondary: getCSSVar('--color-secondary'),
            accent: getCSSVar('--color-accent'),
            neutral: getCSSVar('-color-neutral'),
            info: getCSSVar('--color-info'),
            success: getCSSVar('--color-success'),
            warning: getCSSVar('--color-warning'),
            error: getCSSVar('--color-error')
        };
        
        // Create current CPU chart
        cpuHostChart = new Chart(currentCtx, {
            type: 'bar',
            data: {
                labels: data.hostData.labels,
                datasets: [{
                    label: 'CPU %',
                    data: data.hostData.current,
                    backgroundColor: colors.info + '40',
                    borderColor: colors.info,
                    borderWidth: 1,
                    borderRadius: 3
                }]
            },
            options: {
                responsive: true,
                maintainAspectRatio: false,
                plugins: {
                    legend: { display: false },
                    tooltip: {
                        callbacks: {
                            label: (ctx) => `${ctx.parsed.y}% CPU`
                        }
                    }
                },
                scales: {
                    y: {
                        beginAtZero: true,
                        max: 100,
                        grid: { drawBorder: false },
                        ticks: {
                            callback: value => value + '%'
                        }
                    },
                    x: {
                        grid: { display: false },
                        ticks: {
                            maxRotation: 45
                        }
                    }
                }
            }
        });
        
        // Create projected CPU chart
        cpuProjectedChart = new Chart(projectedCtx, {
            type: 'bar',
            data: {
                labels: data.hostData.labels,
                datasets: [{
                    label: 'Projected CPU %',
                    data: data.hostData.projected,
                    backgroundColor: colors.warning + '40',
                    borderColor: colors.warning,
                    borderWidth: 1,
                    borderRadius: 3
                }]
            },
            options: {
                responsive: true,
                maintainAspectRatio: false,
                plugins: {
                    legend: { display: false },
                    tooltip: {
                        callbacks: {
                            label: (ctx) => `${ctx.parsed.y}% CPU`
                        }
                    }
                },
                scales: {
                    y: {
                        beginAtZero: true,
                        max: 100,
                        grid: { drawBorder: false },
                        ticks: {
                            callback: value => value + '%'
                        }
                    },
                    x: {
                        grid: { display: false },
                        ticks: {
                            maxRotation: 45
                        }
                    }
                }
            }
        });
    }

    // Utility functions
    function calculateStats(data) {
        const mean = data.reduce((a, b) => a + b, 0) / data.length;
        const variance = data.reduce((a, b) => a + Math.pow(b - mean, 2), 0) / data.length;
        const std = Math.sqrt(variance);
        return { mean, std };
    }

    // Initialize
    document.addEventListener('DOMContentLoaded', () => {
        const initialAudit = "{{ audits.0.id|default:'' }}";
        if (initialAudit && auditData[initialAudit]) {
            document.getElementById('auditSelector').dispatchEvent(new Event('change'));
            loadSelectedAudit();
        }
    });
</script>
{% endblock %}

{% block css %}
<style>
    .progress {
    @apply h-1.5;
    }
    .table td, .table th {
    @apply px-4 py-2;
    }
    .badge-xs {
    @apply px-1.5 py-0.5 text-xs;
    }
</style>
{% endblock %}