@extends('patent::layouts.master')

@section('title', 'Change Analytics')

@section('content')
<div class="container-fluid">
    <!-- Header -->
    <div class="d-flex justify-content-between align-items-center mb-4">
        <div>
            <h1 class="h3 mb-0 text-gray-800">Change Analytics</h1>
            <nav aria-label="breadcrumb">
                <ol class="breadcrumb">
                    <li class="breadcrumb-item"><a href="{{ route('patent.dashboard') }}">Dashboard</a></li>
                    <li class="breadcrumb-item active">Change Analytics</li>
                </ol>
            </nav>
        </div>
        <div class="btn-group">
            <button class="btn btn-primary" onclick="refreshData()">
                <i class="fas fa-sync-alt"></i> Refresh
            </button>
        </div>
    </div>

    <!-- Date Range Filter -->
    <div class="card mb-4">
        <div class="card-header">
            <h6 class="m-0 font-weight-bold text-primary">Date Range Filter</h6>
        </div>
        <div class="card-body">
            <form method="GET" action="{{ route('patent.changes.analytics') }}" class="row">
                <div class="col-md-3">
                    <label for="start_date" class="form-label">From Date</label>
                    <input type="date" name="start_date" id="start_date" class="form-control" value="{{ $startDate->format('Y-m-d') }}">
                </div>
                <div class="col-md-3">
                    <label for="end_date" class="form-label">To Date</label>
                    <input type="date" name="end_date" id="end_date" class="form-control" value="{{ $endDate->format('Y-m-d') }}">
                </div>
                <div class="col-md-3 d-flex align-items-end">
                    <button type="submit" class="btn btn-primary mr-2">
                        <i class="fas fa-filter"></i> Apply Filter
                    </button>
                    <a href="{{ route('patent.changes.analytics') }}" class="btn btn-secondary">
                        <i class="fas fa-undo"></i> Reset
                    </a>
                </div>
                <div class="col-md-3 text-right">
                    <small class="text-muted">
                        Period: {{ $startDate->format('M d, Y') }} - {{ $endDate->format('M d, Y') }}<br>
                        <strong>{{ $startDate->diffInDays($endDate) + 1 }} days</strong>
                    </small>
                </div>
            </form>
        </div>
    </div>

    <!-- Overview Cards -->
    <div class="row mb-4">
        <div class="col-xl-3 col-md-6 mb-4">
            <div class="card border-left-primary shadow h-100 py-2">
                <div class="card-body">
                    <div class="row no-gutters align-items-center">
                        <div class="col mr-2">
                            <div class="text-xs font-weight-bold text-primary text-uppercase mb-1">Total Changes</div>
                            <div class="h5 mb-0 font-weight-bold text-gray-800">{{ number_format($analytics['total_changes']) }}</div>
                        </div>
                        <div class="col-auto">
                            <i class="fas fa-history fa-2x text-gray-300"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <div class="col-xl-3 col-md-6 mb-4">
            <div class="card border-left-success shadow h-100 py-2">
                <div class="card-body">
                    <div class="row no-gutters align-items-center">
                        <div class="col mr-2">
                            <div class="text-xs font-weight-bold text-success text-uppercase mb-1">Applications Affected</div>
                            <div class="h5 mb-0 font-weight-bold text-gray-800">{{ number_format($analytics['applications_affected']) }}</div>
                        </div>
                        <div class="col-auto">
                            <i class="fas fa-file-alt fa-2x text-gray-300"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <div class="col-xl-3 col-md-6 mb-4">
            <div class="card border-left-info shadow h-100 py-2">
                <div class="card-body">
                    <div class="row no-gutters align-items-center">
                        <div class="col mr-2">
                            <div class="text-xs font-weight-bold text-info text-uppercase mb-1">Avg Changes/Day</div>
                            <div class="h5 mb-0 font-weight-bold text-gray-800">
                                {{ number_format($analytics['total_changes'] / max(1, $startDate->diffInDays($endDate) + 1), 1) }}
                            </div>
                        </div>
                        <div class="col-auto">
                            <i class="fas fa-chart-line fa-2x text-gray-300"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <div class="col-xl-3 col-md-6 mb-4">
            <div class="card border-left-warning shadow h-100 py-2">
                <div class="card-body">
                    <div class="row no-gutters align-items-center">
                        <div class="col mr-2">
                            <div class="text-xs font-weight-bold text-warning text-uppercase mb-1">High Priority</div>
                            <div class="h5 mb-0 font-weight-bold text-gray-800">
                                {{ ($analytics['severity_distribution']['high'] ?? 0) + ($analytics['severity_distribution']['critical'] ?? 0) }}
                            </div>
                        </div>
                        <div class="col-auto">
                            <i class="fas fa-exclamation-triangle fa-2x text-gray-300"></i>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- Charts Row -->
    <div class="row mb-4">
        <!-- Daily Activity Chart -->
        <div class="col-xl-8 col-lg-7">
            <div class="card shadow mb-4">
                <div class="card-header py-3 d-flex flex-row align-items-center justify-content-between">
                    <h6 class="m-0 font-weight-bold text-primary">Daily Activity</h6>
                </div>
                <div class="card-body">
                    <div class="chart-area">
                        <canvas id="dailyActivityChart"></canvas>
                    </div>
                </div>
            </div>
        </div>

        <!-- Change Types Distribution -->
        <div class="col-xl-4 col-lg-5">
            <div class="card shadow mb-4">
                <div class="card-header py-3 d-flex flex-row align-items-center justify-content-between">
                    <h6 class="m-0 font-weight-bold text-primary">Change Types</h6>
                </div>
                <div class="card-body">
                    <div class="chart-pie pt-4 pb-2">
                        <canvas id="changeTypesChart"></canvas>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- Distribution Charts Row -->
    <div class="row mb-4">
        <!-- Sections Distribution -->
        <div class="col-xl-6">
            <div class="card shadow mb-4">
                <div class="card-header py-3">
                    <h6 class="m-0 font-weight-bold text-primary">Changes by Section</h6>
                </div>
                <div class="card-body">
                    <canvas id="sectionsChart"></canvas>
                </div>
            </div>
        </div>

        <!-- Severity Distribution -->
        <div class="col-xl-6">
            <div class="card shadow mb-4">
                <div class="card-header py-3">
                    <h6 class="m-0 font-weight-bold text-primary">Changes by Severity</h6>
                </div>
                <div class="card-body">
                    <canvas id="severityChart"></canvas>
                </div>
            </div>
        </div>
    </div>

    <!-- Top Applications Table -->
    <div class="card shadow mb-4">
        <div class="card-header py-3">
            <h6 class="m-0 font-weight-bold text-primary">Most Active Applications</h6>
        </div>
        <div class="card-body">
            @if($topApplications->count() > 0)
                <div class="table-responsive">
                    <table class="table table-bordered table-hover" id="topApplicationsTable">
                        <thead class="thead-light">
                            <tr>
                                <th>Rank</th>
                                <th>AIPT Reference</th>
                                <th>Application Title</th>
                                <th>Total Changes</th>
                                <th>Actions</th>
                            </tr>
                        </thead>
                        <tbody>
                            @foreach($topApplications as $index => $app)
                                <tr>
                                    <td>
                                        <span class="badge badge-{{ $index < 3 ? ['primary', 'success', 'info'][$index] : 'secondary' }}">
                                            #{{ $index + 1 }}
                                        </span>
                                    </td>
                                    <td>
                                        <code>{{ $app['aipt_ref'] }}</code>
                                    </td>
                                    <td>{{ Str::limit($app['title'], 50) }}</td>
                                    <td>
                                        <span class="badge badge-info">{{ $app['change_count'] }} changes</span>
                                    </td>
                                    <td>
                                        <a href="{{ route('patent.changes.application', $app['id']) }}" class="btn btn-sm btn-outline-primary">
                                            <i class="fas fa-eye"></i> View Changes
                                        </a>
                                        <a href="{{ route('patent.applications.edit', $app['id']) }}" class="btn btn-sm btn-outline-secondary">
                                            <i class="fas fa-edit"></i> Edit
                                        </a>
                                    </td>
                                </tr>
                            @endforeach
                        </tbody>
                    </table>
                </div>
            @else
                <div class="text-center py-4">
                    <i class="fas fa-chart-bar fa-3x text-gray-300 mb-3"></i>
                    <h5 class="text-gray-500">No Data Available</h5>
                    <p class="text-gray-400">No applications found for the selected period.</p>
                </div>
            @endif
        </div>
    </div>

    <!-- Hourly Activity Chart -->
    <div class="card shadow mb-4">
        <div class="card-header py-3">
            <h6 class="m-0 font-weight-bold text-primary">Activity by Hour</h6>
        </div>
        <div class="card-body">
            <canvas id="hourlyActivityChart"></canvas>
        </div>
    </div>
</div>

@push('scripts')
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<script>
// Chart data from backend
const analyticsData = @json($analytics);

// Daily Activity Chart
const dailyActivityCtx = document.getElementById('dailyActivityChart').getContext('2d');
const dailyActivityData = Object.entries(analyticsData.daily_activity || {}).map(([date, count]) => ({
    x: date,
    y: count
}));

new Chart(dailyActivityCtx, {
    type: 'line',
    data: {
        datasets: [{
            label: 'Changes per Day',
            data: dailyActivityData,
            borderColor: 'rgb(78, 115, 223)',
            backgroundColor: 'rgba(78, 115, 223, 0.1)',
            fill: true,
            tension: 0.3
        }]
    },
    options: {
        responsive: true,
        scales: {
            x: {
                type: 'time',
                time: {
                    unit: 'day'
                }
            },
            y: {
                beginAtZero: true
            }
        }
    }
});

// Change Types Chart
const changeTypesCtx = document.getElementById('changeTypesChart').getContext('2d');
const changeTypesData = analyticsData.change_types_distribution || {};

new Chart(changeTypesCtx, {
    type: 'doughnut',
    data: {
        labels: Object.keys(changeTypesData).map(type => type.replace('_', ' ')),
        datasets: [{
            data: Object.values(changeTypesData),
            backgroundColor: [
                '#4e73df', '#1cc88a', '#36b9cc', '#f6c23e', '#e74a3b',
                '#858796', '#5a5c69', '#2e59d9', '#17a2b8', '#28a745'
            ]
        }]
    },
    options: {
        responsive: true,
        maintainAspectRatio: false,
        plugins: {
            legend: {
                position: 'bottom'
            }
        }
    }
});

// Sections Chart
const sectionsCtx = document.getElementById('sectionsChart').getContext('2d');
const sectionsData = analyticsData.sections_distribution || {};

new Chart(sectionsCtx, {
    type: 'bar',
    data: {
        labels: Object.keys(sectionsData).map(section => section.replace('_', ' ')),
        datasets: [{
            label: 'Changes',
            data: Object.values(sectionsData),
            backgroundColor: 'rgba(78, 115, 223, 0.8)',
            borderColor: 'rgb(78, 115, 223)',
            borderWidth: 1
        }]
    },
    options: {
        responsive: true,
        scales: {
            y: {
                beginAtZero: true
            }
        }
    }
});

// Severity Chart
const severityCtx = document.getElementById('severityChart').getContext('2d');
const severityData = analyticsData.severity_distribution || {};

new Chart(severityCtx, {
    type: 'bar',
    data: {
        labels: Object.keys(severityData),
        datasets: [{
            label: 'Changes',
            data: Object.values(severityData),
            backgroundColor: [
                'rgba(28, 200, 138, 0.8)', // low - green
                'rgba(54, 185, 204, 0.8)', // medium - blue
                'rgba(246, 194, 62, 0.8)', // high - yellow
                'rgba(231, 74, 59, 0.8)'  // critical - red
            ],
            borderColor: [
                'rgb(28, 200, 138)',
                'rgb(54, 185, 204)',
                'rgb(246, 194, 62)',
                'rgb(231, 74, 59)'
            ],
            borderWidth: 1
        }]
    },
    options: {
        responsive: true,
        scales: {
            y: {
                beginAtZero: true
            }
        }
    }
});

// Hourly Activity Chart
const hourlyActivityCtx = document.getElementById('hourlyActivityChart').getContext('2d');
const hourlyActivityData = analyticsData.hourly_activity || {};

// Create array with all 24 hours
const hourlyData = [];
for (let i = 0; i < 24; i++) {
    hourlyData.push(hourlyActivityData[i.toString().padStart(2, '0')] || 0);
}

new Chart(hourlyActivityCtx, {
    type: 'bar',
    data: {
        labels: Array.from({length: 24}, (_, i) => `${i.toString().padStart(2, '0')}:00`),
        datasets: [{
            label: 'Changes per Hour',
            data: hourlyData,
            backgroundColor: 'rgba(28, 200, 138, 0.8)',
            borderColor: 'rgb(28, 200, 138)',
            borderWidth: 1
        }]
    },
    options: {
        responsive: true,
        scales: {
            y: {
                beginAtZero: true
            }
        }
    }
});

// Initialize DataTable
$(document).ready(function() {
    $('#topApplicationsTable').DataTable({
        order: [[3, 'desc']],
        pageLength: 10,
        responsive: true
    });
});

function refreshData() {
    window.location.reload();
}
</script>
@endpush

@endsection