@extends('layouts.admin')

@section('title', setting('school_name', 'ShulePoint') . ' | Invoices')
@section('page-title', 'Invoices')

@section('content')
{{-- Generate card --}}
<div class="card card-outline card-primary shadow-sm learner-card">
    <div class="card-header">
        <h3 class="card-title"><i class="fas fa-magic mr-1"></i> Generate for class</h3>
        <div class="card-tools">
            @if(!empty($currentYear) || !empty($currentTerm))
                <span class="badge badge-success">Auto: {{ $currentYear->name ?? '—' }} · {{ $currentTerm->name ?? '—' }}</span>
            @endif
        </div>
    </div>
    <form method="POST" action="{{ route('finance.invoices.generate') }}">
        @csrf
        <div class="card-body">
            @if(($classes ?? collect())->isEmpty())
                <div class="alert alert-warning mb-0"><i class="fas fa-exclamation-triangle mr-1"></i> No classes have been added yet. <a href="{{ route('academics.index') }}">Add classes in Academics</a> first, then generate invoices.</div>
            @else
            <div class="row">
                <div class="col-md-4">
                    <label class="fld-label">Class <span class="text-danger">*</span></label>
                    <select name="school_class_id" id="invoice-class" required class="form-control form-control-sm @error('school_class_id') is-invalid @enderror">
                        <option value="">Select class…</option>
                        @foreach($classes as $c)
                            <option value="{{ $c->id }}" data-year-id="{{ $c->academic_year_id ?? '' }}" @selected((string) old('school_class_id') === (string) $c->id)>{{ $c->name }}@if($c->gradeLevel) · {{ $c->gradeLevel->name }}@endif ({{ $c->learners_count ?? 0 }} learners)</option>
                        @endforeach
                    </select>
                    @error('school_class_id')<span class="invalid-feedback d-block">{{ $message }}</span>@enderror
                </div>
                <div class="col-md-3">
                    <label class="fld-label">Academic Year <small class="text-muted">(auto)</small></label>
                    <select name="academic_year_id" id="invoice-year" class="form-control form-control-sm @error('academic_year_id') is-invalid @enderror">
                        <option value="">Current ({{ $currentYear->name ?? '—' }})</option>
                        @foreach($years as $y)
                            <option value="{{ $y->id }}" @selected((string) old('academic_year_id', $currentYear->id ?? '') === (string) $y->id)>{{ $y->name }}@if($y->is_current) · current @endif</option>
                        @endforeach
                    </select>
                    @error('academic_year_id')<span class="invalid-feedback d-block">{{ $message }}</span>@enderror
                </div>
                <div class="col-md-2">
                    <label class="fld-label">Term <small class="text-muted">(auto)</small></label>
                    <select name="term_id" id="invoice-term" class="form-control form-control-sm @error('term_id') is-invalid @enderror">
                        <option value="">Current ({{ $currentTerm->name ?? '—' }})</option>
                        @foreach($terms as $t)
                            <option value="{{ $t->id }}" @selected((string) old('term_id', $currentTerm->id ?? '') === (string) $t->id)>{{ $t->name }}@if($t->is_current) · current @endif</option>
                        @endforeach
                    </select>
                    @error('term_id')<span class="invalid-feedback d-block">{{ $message }}</span>@enderror
                </div>
                <div class="col-md-3">
                    <label class="fld-label">Due Date</label>
                    <div class="input-group input-group-sm">
                        <input type="date" name="due_date" value="{{ old('due_date') }}" class="form-control @error('due_date') is-invalid @enderror">
                        <div class="input-group-append"><button type="submit" class="btn btn-primary"><i class="fas fa-magic mr-1"></i> Generate</button></div>
                    </div>
                    @error('due_date')<span class="invalid-feedback d-block">{{ $message }}</span>@enderror
                </div>
            </div>
            <small class="text-muted">Year and term default to the current ones set by the admin. Pick the class you added in Academics — invoices go to every learner in it.</small>
            @endif
        </div>
    </form>
</div>

{{-- Bulk action bar --}}
<div id="bulkBar" class="bulk-bar d-none">
    <div class="d-flex align-items-center flex-wrap">
        <span class="bulk-count mr-2"><strong id="bulkCount">0</strong> selected</span>
        <button type="button" class="btn btn-sm btn-light mr-1" data-toggle="modal" data-target="#bulkStatusModal"><i class="fas fa-tag mr-1"></i> Set status</button>
        <button type="button" class="btn btn-sm btn-danger mr-1" data-toggle="modal" data-target="#bulkDeleteModal"><i class="fas fa-trash mr-1"></i> Delete</button>
        <button type="button" id="clearSelection" class="btn btn-sm btn-link text-white">Clear</button>
    </div>
    <small class="bulk-hint">Deleting removes payments + M-Pesa records linked to the invoice · this page only</small>
</div>

{{-- Invoices table card --}}
<div class="card shadow-sm learner-card">
    <div class="card-header">
        <h3 class="card-title"><i class="fas fa-file-invoice mr-1"></i> Invoices
            <small class="text-muted ml-1">{{ number_format($invoices->total()) }} total</small>
        </h3>
        <div class="card-tools">
            <span class="badge badge-light border mr-1" id="pageSelectedBadge">0 on page</span>
            <a href="{{ route('finance.payments.create') }}" class="btn btn-sm btn-primary"><i class="fas fa-plus mr-1"></i> Record Payment</a>
        </div>
    </div>
    <div class="card-body table-responsive p-0">
        <table class="table learner-table table-hover text-nowrap mb-0">
            <thead>
                <tr>
                    <th class="col-check"><input type="checkbox" id="selectAll" title="Select all on page"></th>
                    <th>No</th>
                    <th>Learner</th>
                    <th>Total</th>
                    <th>Paid</th>
                    <th>Balance</th>
                    <th>Status</th>
                    @include('layouts.partials.school-th')
                    <th class="text-right">Action</th>
                </tr>
            </thead>
            <tbody>
                @forelse($invoices as $i)
                    @php
                        $pill = $i->status === 'paid' ? 'ok' : ($i->status === 'partial' ? 'warn' : ($i->status === 'overdue' ? 'bad' : ($i->status === 'cancelled' ? 'muted' : 'info')));
                    @endphp
                    <tr data-row="{{ $i->id }}">
                        <td class="col-check"><input type="checkbox" class="row-check" value="{{ $i->id }}" aria-label="Select {{ $i->invoice_no }}"></td>
                        <td><a href="{{ route('finance.invoices.show', $i) }}" class="learner-name">{{ $i->invoice_no }}</a></td>
                        <td>@if($i->learner)<span class="learner-name">{{ $i->learner->first_name }} {{ $i->learner->last_name }}</span> <span class="adm-chip ml-1">{{ $i->learner->admission_no }}</span>@else<span class="text-muted">#{{ $i->learner_id }}</span>@endif</td>
                        <td>KES {{ number_format($i->total, 0) }}</td>
                        <td class="text-success">KES {{ number_format($i->paid, 0) }}</td>
                        <td class="font-weight-600">KES {{ number_format($i->balance, 0) }}</td>
                        <td><span class="status-pill {{ $pill }}"><span class="dot"></span>{{ ucfirst($i->status) }}</span></td>
                        @include('layouts.partials.school-td', ['schoolId' => $i->school_id ?? null])
                        <td class="text-right">
                            <div class="btn-group btn-group-sm" role="group">
                                <a href="{{ route('finance.invoices.show', $i) }}" class="btn btn-outline-info" title="View"><i class="fas fa-eye"></i></a>
                                <button type="button" class="btn btn-outline-danger" title="Delete" data-toggle="modal" data-target="#delete-{{ $i->id }}"><i class="fas fa-trash"></i></button>
                            </div>
                        </td>
                    </tr>
                @empty
                    <tr>
                        <td colspan="9" class="text-center py-5">
                            <i class="fas fa-file-invoice fa-3x text-muted mb-3"></i>
                            <p class="font-weight-bold mb-1">No invoices yet</p>
                            <p class="text-muted small mb-0">Generate invoices for a class using the form above.</p>
                        </td>
                    </tr>
                @endforelse
            </tbody>
        </table>
    </div>
    <div class="card-footer d-flex justify-content-between align-items-center flex-wrap">
        <small class="text-muted">Page {{ $invoices->currentPage() }} of {{ $invoices->lastPage() }} · {{ number_format($invoices->total()) }} total</small>
        <div class="mb-0">{{ $invoices->links() }}</div>
    </div>
</div>

{{-- Single delete confirmations --}}
@foreach($invoices as $i)
<div class="modal fade" id="delete-{{ $i->id }}" tabindex="-1" role="dialog" aria-hidden="true">
    <div class="modal-dialog modal-sm" role="document">
        <div class="modal-content">
            <div class="modal-header"><h5 class="modal-title">Delete invoice?</h5>
                <button type="button" class="close" data-dismiss="modal"><span>&times;</span></button></div>
            <div class="modal-body">
                <p class="mb-1">Delete <strong>{{ $i->invoice_no }}</strong> (KES {{ number_format($i->balance, 0) }} balance)?</p>
                <small class="text-danger">Its {{ $i->payments_count ?? $i->payments()->count() }} payment(s) and linked M-Pesa records are removed too.</small>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary btn-sm" data-dismiss="modal">Cancel</button>
                <form method="POST" action="{{ route('finance.invoices.destroy', $i) }}" class="d-inline">@csrf @method('DELETE')
                    <button type="submit" class="btn btn-danger btn-sm">Delete all</button>
                </form>
            </div>
        </div>
    </div>
</div>
@endforeach

{{-- Bulk: set status --}}
<div class="modal fade" id="bulkStatusModal" tabindex="-1" role="dialog" aria-hidden="true">
    <div class="modal-dialog modal-sm" role="document">
        <form method="POST" action="{{ route('finance.invoices.bulk') }}" class="modal-content">@csrf
            <input type="hidden" name="action" value="status">
            <div class="bulk-ids-holder"></div>
            <div class="modal-header"><h5 class="modal-title">Set status (<span class="bulk-modal-count">0</span>)</h5>
                <button type="button" class="close" data-dismiss="modal"><span>&times;</span></button></div>
            <div class="modal-body">
                <label class="small text-muted">New status <small>(paid/partial are system-derived)</small></label>
                <select name="status" class="form-control form-control-sm" required>
                    <option value="unpaid">Unpaid</option>
                    <option value="overdue">Overdue</option>
                    <option value="cancelled">Cancelled</option>
                </select>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary btn-sm" data-dismiss="modal">Cancel</button>
                <button type="submit" class="btn btn-primary btn-sm">Apply</button>
            </div>
        </form>
    </div>
</div>

{{-- Bulk: delete --}}
<div class="modal fade" id="bulkDeleteModal" tabindex="-1" role="dialog" aria-hidden="true">
    <div class="modal-dialog modal-sm" role="document">
        <form method="POST" action="{{ route('finance.invoices.bulk') }}" class="modal-content">@csrf
            <input type="hidden" name="action" value="delete">
            <div class="bulk-ids-holder"></div>
            <div class="modal-header"><h5 class="modal-title text-danger">Delete <span class="bulk-modal-count">0</span> invoice(s)?</h5>
                <button type="button" class="close" data-dismiss="modal"><span>&times;</span></button></div>
            <div class="modal-body"><p class="small text-muted mb-0">Linked payments and M-Pesa records are removed too. This cannot be undone.</p></div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary btn-sm" data-dismiss="modal">Cancel</button>
                <button type="submit" class="btn btn-danger btn-sm">Delete selected</button>
            </div>
        </form>
    </div>
</div>
@endsection

@push('scripts')
<script>
(function () {
    var classSel = document.getElementById('invoice-class');
    var yearSel = document.getElementById('invoice-year');
    if (classSel && yearSel) {
        classSel.addEventListener('change', function () {
            var opt = classSel.options[classSel.selectedIndex];
            var yearId = opt ? opt.getAttribute('data-year-id') : '';
            if (yearId) { yearSel.value = yearId; }
        });
    }
    var selectAll = document.getElementById('selectAll');
    var checks = Array.prototype.slice.call(document.querySelectorAll('.row-check'));
    var bulkBar = document.getElementById('bulkBar');
    var bulkCount = document.getElementById('bulkCount');
    var pageBadge = document.getElementById('pageSelectedBadge');
    var clearBtn = document.getElementById('clearSelection');
    function selectedIds() {
        return checks.filter(function (c) { return c.checked; }).map(function (c) { return c.value; });
    }
    function refresh() {
        var ids = selectedIds();
        bulkCount.textContent = ids.length;
        pageBadge.textContent = ids.length + ' on page';
        bulkBar.classList.toggle('d-none', ids.length === 0);
        document.querySelectorAll('.bulk-modal-count').forEach(function (el) { el.textContent = ids.length; });
        document.querySelectorAll('.bulk-ids-holder').forEach(function (holder) {
            holder.innerHTML = '';
            ids.forEach(function (id) {
                var h = document.createElement('input');
                h.type = 'hidden'; h.name = 'ids[]'; h.value = id;
                holder.appendChild(h);
            });
        });
        checks.forEach(function (c) {
            var tr = c.closest('tr');
            if (tr) tr.classList.toggle('is-selected', c.checked);
        });
        if (selectAll) {
            selectAll.checked = ids.length > 0 && ids.length === checks.length;
            selectAll.indeterminate = ids.length > 0 && ids.length < checks.length;
        }
    }
    if (selectAll) {
        selectAll.addEventListener('change', function () {
            checks.forEach(function (c) { c.checked = selectAll.checked; });
            refresh();
        });
    }
    checks.forEach(function (c) { c.addEventListener('change', refresh); });
    if (clearBtn) {
        clearBtn.addEventListener('click', function () {
            checks.forEach(function (c) { c.checked = false; });
            refresh();
        });
    }
    refresh();
})();
</script>
@endpush