@extends('layouts.master')

@section('page_title', 'Billing Periods')

@section('content')
<div class="container-fluid">
    <div class="d-flex justify-content-between align-items-center mb-4">
        <h1>Billing Periods</h1>
        <a href="{{ route('billing-periods.create') }}" class="btn btn-primary">
            <i class="fas fa-plus"></i> New Billing Period
        </a>
    </div>

    @if(session('success'))
        <div class="alert alert-success alert-dismissible fade show" role="alert">
            {{ session('success') }}
            <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
        </div>
    @endif

    @if($errors->any())
        <div class="alert alert-danger alert-dismissible fade show" role="alert">
            <ul class="mb-0">
                @foreach($errors->all() as $error)
                    <li>{{ $error }}</li>
                @endforeach
            </ul>
            <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
        </div>
    @endif

    <div class="card">
        <div class="card-header">
            <h5 class="mb-0">Billing Periods Management</h5>
            <small class="text-muted">Manage termly billing periods for fee collection and tracking</small>
        </div>
        <div class="card-body">
            @if($billingPeriods->count() > 0)
                <div class="table-responsive">
                    <table class="table table-striped table-hover">
                        <thead class="table-dark">
                            <tr>
                                <th>Period Name</th>
                                <th>Term/Session</th>
                                <th>Duration</th>
                                <th>Due Date</th>
                                <th>Status</th>
                                <th>Bills</th>
                                <th>Amount</th>
                                <th>Actions</th>
                            </tr>
                        </thead>
                        <tbody>
                            @foreach($billingPeriods as $period)
                                <tr>
                                    <td>
                                        <div>
                                            <strong>{{ $period->name }}</strong>
                                            @if($period->is_current)
                                                <span class="badge bg-primary ms-1">Current</span>
                                            @endif
                                            <br>
                                            <small class="text-muted">{{ $period->code }}</small>
                                        </div>
                                    </td>
                                    <td>
                                        <div>
                                            <strong>Term {{ $period->term_id }}</strong>
                                            <br>
                                            <small class="text-muted">{{ $period->sch_session }}</small>
                                        </div>
                                    </td>
                                    <td>
                                        <div>
                                            <small>
                                                <strong>Start:</strong> {{ $period->start_date->format('M j, Y') }}<br>
                                                <strong>End:</strong> {{ $period->end_date->format('M j, Y') }}
                                            </small>
                                        </div>
                                    </td>
                                    <td>
                                        <div>
                                            <strong>{{ $period->billing_due_date->format('M j, Y') }}</strong>
                                            @if($period->isOverdue())
                                                <br><span class="badge bg-danger">Overdue</span>
                                            @endif
                                        </div>
                                    </td>
                                    <td>
                                        <span class="badge bg-{{ $period->status_color }}">
                                            {{ ucfirst($period->status) }}
                                        </span>
                                        @if(!$period->is_active)
                                            <br><span class="badge bg-secondary">Inactive</span>
                                        @endif
                                    </td>
                                    <td>
                                        <div>
                                            <strong>{{ $period->bills()->count() }}</strong> bills
                                            <br>
                                            <small class="text-muted">
                                                {{ $period->bills()->distinct('session_student_id')->count() }} students
                                            </small>
                                        </div>
                                    </td>
                                    <td>
                                        <div>
                                            <strong>GHS {{ number_format($period->total_billed, 2) }}</strong>
                                            <br>
                                            <small class="text-success">
                                                Paid: GHS {{ number_format($period->total_paid, 2) }}
                                            </small>
                                            <br>
                                            <small class="text-danger">
                                                Outstanding: GHS {{ number_format($period->total_outstanding, 2) }}
                                            </small>
                                        </div>
                                    </td>
                                    <td>
                                        <div class="btn-group" role="group">
                                            <a href="{{ route('billing-periods.show', $period) }}" 
                                               class="btn btn-sm btn-outline-info" title="View Details">
                                                View 
                                            </a>
                                            <a href="{{ route('billing-periods.edit', $period) }}" 
                                               class="btn btn-sm btn-outline-warning" title="Edit">
                                                Edit
                                            </a>
                                            
                                            @if(!$period->is_current)
                                                <form action="{{ route('billing-periods.make-current', $period) }}" 
                                                      method="POST" class="d-inline">
                                                    @csrf
                                                    <button type="submit" class="btn btn-sm btn-outline-primary" 
                                                            title="Set as Current">
                                                        Set as Current
                                                    </button>
                                                </form>
                                            @endif

                                            <form action="{{ route('billing-periods.toggle-status', $period) }}" 
                                                  method="POST" class="d-inline">
                                                @csrf
                                                <button type="submit" 
                                                        class="btn btn-sm btn-outline-{{ $period->is_active ? 'secondary' : 'success' }}"
                                                        title="{{ $period->is_active ? 'Deactivate' : 'Activate' }}">
                                                    {{ $period->is_active ? 'Close' : 'Activate' }}
                                                </button>
                                            </form>

                                            @if($period->bills()->count() == 0)
                                                <form action="{{ route('billing-periods.destroy', $period) }}" 
                                                      method="POST" class="d-inline"
                                                      onsubmit="return confirm('Are you sure you want to delete this billing period?')">
                                                    @csrf
                                                    @method('DELETE')
                                                    <button type="submit" class="btn btn-sm btn-outline-danger" title="Delete">
                                                        Delete
                                                    </button>
                                                </form>
                                            @endif
                                        </div>
                                    </td>
                                </tr>
                            @endforeach
                        </tbody>
                    </table>
                </div>

                <div class="d-flex justify-content-center mt-3">
                    {{ $billingPeriods->links() }}
                </div>
            @else
                <div class="text-center py-5">
                    <i class="fas fa-calendar-alt fa-3x text-muted mb-3"></i>
                    <h5>No Billing Periods Found</h5>
                    <p class="text-muted">Create your first billing period to start tracking fee payments by term.</p>
                    <a href="{{ route('billing-periods.create') }}" class="btn btn-primary">
                        <i class="fas fa-plus"></i> Create Billing Period
                    </a>
                </div>
            @endif
        </div>
    </div>

    <!-- Information Card -->
    <div class="card mt-4">
        <div class="card-header">
            <h6 class="mb-0">
                <i class="fas fa-info-circle"></i> About Billing Periods
            </h6>
        </div>
        <div class="card-body">
            <div class="row">
                <div class="col-md-3">
                    <h6><i class="fas fa-calendar text-primary"></i> Term-Based</h6>
                    <p class="small text-muted">
                        Billing periods are organized by academic terms to match your school's fee collection schedule.
                    </p>
                </div>
                <div class="col-md-3">
                    <h6><i class="fas fa-clock text-warning"></i> Due Dates</h6>
                    <p class="small text-muted">
                        Set billing due dates with optional late fees and grace periods for better fee management.
                    </p>
                </div>
                <div class="col-md-3">
                    <h6><i class="fas fa-chart-line text-success"></i> Tracking</h6>
                    <p class="small text-muted">
                        Track payment progress, outstanding amounts, and generate reports by billing period.
                    </p>
                </div>
                <div class="col-md-3">
                    <h6><i class="fas fa-star text-info"></i> Current Period</h6>
                    <p class="small text-muted">
                        Mark one period as current for default bill generation and active fee collection.
                    </p>
                </div>
            </div>
        </div>
    </div>
</div>
@endsection