@extends('layouts.portal')
@php
    $status = $invoice->status;
    $eff = $invoice->effectiveStatus();
    $bal = $invoice->balance();
    $pct = (float) $invoice->total > 0 ? min(100, round($invoice->amount_paid / $invoice->total * 100)) : 0;
    $isVoid = $status === 'void';
    $canPay = ! $isVoid && $bal > 0;
    $enr = $invoice->enrollment;
    $thr = rtrim(rtrim(number_format($threshold, 2), '0'), '.');
    $pendingPay = $invoice->payments->where('status', 'pending');
    $payLink = route('invoices.show', $invoice->token);
@endphp
@section('title', 'Invoice '.$invoice->number)
@section('subtitle', $invoice->customer_name.($invoice->company ? ' · '.$invoice->company : '').' · due '.($invoice->due_date?->format('d M Y') ?? '—'))
@section('actions')
  <a class="btn btn-secondary" href="{{ route('admin.billing.invoices.index') }}"><x-icon name="arrow-left" :size="16"/> All invoices</a>
  <a class="btn btn-secondary" href="{{ route('admin.billing.invoices.pdf', $invoice) }}" target="_blank" rel="noopener"><x-icon name="download" :size="16"/> Download PDF</a>
@endsection
@section('content')
<div class="ac-split">
  <div class="ac-main">
    @if($isVoid)<div class="callout danger mb-2" role="status"><x-icon name="x-circle" :size="20"/><div><b>This invoice is void.</b> It no longer counts towards billed or outstanding totals and cannot take payments.</div></div>
    @elseif($invoice->isOverdue())<div class="callout danger mb-2" role="status"><x-icon name="alert" :size="20"/><div><b>Overdue by {{ $invoice->due_date->diffForHumans(null, true) }}.</b> {{ money2($bal) }} was due on {{ $invoice->due_date->format('d M Y') }}. Send a reminder from the panel on the right.</div></div>
    @elseif($status === 'draft')<div class="callout warn mb-2" role="status"><x-icon name="info" :size="20"/><div><b>Draft — not sent yet.</b> The customer's pay link stays offline until you send the invoice.</div></div>@endif
    @if($pendingPay->count())<div class="callout warn mb-2" role="status"><x-icon name="shield-alert" :size="20"/><div><b>{{ $pendingPay->count() }} payment proof{{ $pendingPay->count() === 1 ? '' : 's' }} waiting for verification</b> ({{ money2($pendingPay->sum('amount')) }}). Approve or reject them in the list below.</div></div>@endif

    @include('admin.billing._document', ['doc' => $invoice, 'kind' => 'invoice', 'payMethods' => $payMethods])

    <section class="panel mt-3" aria-labelledby="pay-h">
      <div class="panel-head"><h2 id="pay-h">Payments on this invoice</h2><span class="ac-hint">{{ $invoice->payments->count() }} record{{ $invoice->payments->count() === 1 ? '' : 's' }}</span></div>
      @forelse($invoice->payments->sortByDesc('id') as $p)
        <div class="ac-pay">
          <div>
            <div class="ac-pay-top"><span class="ac-num">{{ $p->receipt_no ?: $p->reference }}</span><x-pill :status="$p->status === 'failed' ? 'rejected' : $p->status"/></div>
            <div class="ac-pay-meta">{{ ($p->paid_at ?? $p->created_at)->format('d M Y') }} · {{ $methods[$p->method] ?? ucfirst(str_replace('_', ' ', (string) $p->method)) }}@if($p->transaction_ref) · Ref {{ $p->transaction_ref }}@endif · {{ $p->receiver ? 'recorded by '.$p->receiver->name : 'submitted by customer' }}</div>
          </div>
          <div class="ac-money">{{ money2($p->amount) }}</div>
          <div class="ac-actions">
            @if($p->proof_path)<a class="btn btn-secondary btn-sm" href="{{ route('admin.billing.payments.proof', $p) }}" target="_blank" rel="noopener"><x-icon name="paperclip" :size="14"/> Proof</a>@endif
            @if($p->status === 'pending')
              <form method="post" action="{{ route('admin.billing.payments.confirm', $p) }}" data-confirm="Approve {{ money2($p->amount) }} and email the receipt?">@csrf<button class="btn btn-success btn-sm" type="submit"><x-icon name="check" :size="14"/> Approve</button></form>
              <button class="btn btn-danger btn-sm" type="button" data-modal-open="#rej-{{ $p->id }}"><x-icon name="x" :size="14"/> Reject</button>
            @elseif($p->status === 'paid')
              <a class="btn btn-secondary btn-sm" href="{{ route('admin.billing.payments.receipt.pdf', $p) }}" target="_blank" rel="noopener"><x-icon name="download" :size="14"/> Receipt</a>
              <form method="post" action="{{ route('admin.billing.payments.receipt', $p) }}" data-confirm="Re-send the receipt email?">@csrf<button class="btn btn-secondary btn-sm" type="submit"><x-icon name="mail" :size="14"/> Resend</button></form>
              <button class="btn btn-danger btn-sm" type="button" data-modal-open="#ref-{{ $p->id }}"><x-icon name="refresh" :size="14"/> Refund</button>
            @endif
          </div>
        </div>
      @empty
        <div class="table-empty">No payments yet. Record money received using the form on the right.</div>
      @endforelse
    </section>
  </div>

  <aside class="ac-aside" aria-label="Balance and actions">
    <section class="panel ac-bal">
      <div class="ac-lbl">Balance due</div>
      <div class="ac-bal-num {{ $bal <= 0 && ! $isVoid ? 'ok' : '' }}">{{ $isVoid ? '—' : money2($bal) }}</div>
      <div class="progress {{ $pct >= 100 ? 'green' : '' }}" style="margin:14px 0 12px" role="progressbar" aria-valuenow="{{ $pct }}" aria-valuemin="0" aria-valuemax="100" aria-label="Paid"><i style="width:{{ $pct }}%"></i></div>
      <div class="ac-sum-row"><span>Invoice total</span><b>{{ money2($invoice->total) }}</b></div>
      <div class="ac-sum-row"><span>Paid so far</span><b>{{ money2($invoice->amount_paid) }} <span class="muted small">({{ $pct }}%)</span></b></div>
      <div class="ac-sum-row"><span>Status</span><x-pill :status="$eff"/></div>
    </section>

    @if($enr)
      @php
        $net = $enr->netFee(); $need = max(0, round($net * $threshold / 100 - (float) $enr->paid_amount, 2));
      @endphp
      <section class="panel">
        <div class="panel-head"><h2>Enrollment</h2><x-pill :status="$enr->status"/></div>
        <div class="panel-body">
          <p style="margin:0 0 6px"><b>{{ $enr->user?->name }}</b><br><span class="muted small">{{ $enr->batch?->course?->title }} · Batch {{ $enr->batch?->batch_code }}</span></p>
          @if($enr->status === 'pending')
            <div class="callout warn" style="padding:12px 14px"><x-icon name="info" :size="18"/><div class="small">Activates automatically when {{ $thr }}% of the net fee ({{ money2($net) }}) is paid. {{ $need > 0 ? money2($need).' more needed.' : 'Threshold met — activation runs when the next payment is verified.' }}</div></div>
          @elseif($enr->status === 'active')
            <p class="small" style="margin:0;color:#0b7a4b"><x-icon name="check-circle" :size="15"/> Active{{ $enr->activated_at ? ' since '.$enr->activated_at->format('d M Y') : '' }}. Paid {{ money2($enr->paid_amount) }} of {{ money2($net) }}.</p>
          @else
            <p class="small muted" style="margin:0">Enrollment is {{ $enr->status }}.</p>
          @endif
        </div>
      </section>
    @endif

    @php($plan = $invoice->paymentPlan)
    <section class="panel">
      <div class="panel-head"><h2>Installments</h2>@if($plan)<x-pill :status="$plan->financialStatus()"/>@endif</div>
      <div class="panel-body">
        @if($plan)
          @php($nx = $plan->nextInstallment())
          <p class="small" style="margin:0 0 10px">Plan <a class="ac-num" href="{{ route('admin.plans.show', $plan) }}">{{ $plan->code }}</a> · {{ $plan->installments->where('status', '!=', 'cancelled')->count() }} parts.@if($nx) Next <b>{{ money2($nx->outstanding()) }}</b> due {{ $nx->due_date->format('d M Y') }}.@endif</p>
          <a class="btn btn-secondary btn-block" href="{{ route('admin.plans.show', $plan) }}"><x-icon name="wallet" :size="16"/> Open payment plan</a>
        @elseif(! $isVoid && $bal > 0)
          <p class="small muted" style="margin:0 0 10px">Let the customer pay in parts — registration fee + monthly installments with automatic reminders.</p>
          <a class="btn btn-secondary btn-block" href="{{ route('admin.plans.create', ['invoice' => $invoice->id]) }}"><x-icon name="wallet" :size="16"/> Split into installments</a>
        @else
          <p class="small muted" style="margin:0">No installment plan.</p>
        @endif
      </div>
    </section>

    @if($canPay)
    <section class="panel">
      <div class="panel-head"><h2>Record payment</h2></div>
      <div class="panel-body">
        <form method="post" action="{{ route('admin.billing.invoices.payments.store', $invoice) }}">
          @csrf
          <x-field name="amount" label="Amount received ({{ config('infotics.currency', 'PKR') }})" type="number" :value="$bal" min="1" :max="$bal" step="0.01" required :help="'Outstanding: '.money2($bal).'. Enter half to record a 50% instalment.'"/>
          <x-field name="method" label="Method" type="select" :options="$methods" value="bank_transfer" required/>
          <x-field name="transaction_ref" label="Reference / transaction ID" placeholder="e.g. bank slip or Easypaisa TID"/>
          <x-field name="paid_on" label="Date received" type="date" :value="now()->format('Y-m-d')" :max="now()->format('Y-m-d')"/>
          <x-field name="notes" label="Note (internal)" type="textarea" :rows="2"/>
          <label class="check" style="margin-bottom:14px"><input type="hidden" name="send_receipt" value="0"><input type="checkbox" name="send_receipt" value="1" @checked(session()->hasOldInput() ? old('send_receipt') : true)> <span>Email the receipt to {{ $invoice->customer_email }}</span></label>
          <button class="btn btn-success btn-block" type="submit"><x-icon name="check" :size="16"/> Record payment</button>
        </form>
      </div>
    </section>
    @endif

    <section class="panel">
      <div class="panel-head"><h2>Actions</h2></div>
      <div class="panel-body ac-stack">
        @if(! $isVoid)
          <form method="post" action="{{ route('admin.billing.invoices.send', $invoice) }}" data-confirm="{{ $status === 'draft' ? 'Email this invoice to '.$invoice->customer_email.'?' : 'Re-send this invoice to '.$invoice->customer_email.'?' }}">@csrf
            <button class="btn {{ $status === 'draft' ? 'btn-primary' : 'btn-secondary' }}" type="submit"><x-icon name="send" :size="16"/> {{ $status === 'draft' ? 'Send invoice' : 'Resend invoice' }}</button>
          </form>
        @endif
        @if(in_array($status, ['sent', 'partial'], true) && $bal > 0)
          <form method="post" action="{{ route('admin.billing.invoices.remind', $invoice) }}" data-confirm="Email a payment reminder to {{ $invoice->customer_email }}?">@csrf<button class="btn btn-secondary" type="submit"><x-icon name="bell" :size="16"/> Send payment reminder</button></form>
        @endif
        <a class="btn btn-secondary" href="{{ route('admin.comms.compose', array_filter(['user' => $invoice->user_id, 'template' => 'payment_details', 'invoice_id' => $invoice->id, 'mode' => $invoice->user_id ? 'students' : 'emails'])) }}"><x-icon name="mail" :size="16"/> Send payment details</a>
        <a class="btn btn-ghost" href="{{ \App\Services\DocumentVerifier::url('invoice', $invoice->number) }}" target="_blank" rel="noopener"><x-icon name="shield" :size="16"/> Verification page</a>
        @if($invoice->quote)<a class="btn btn-secondary" href="{{ route('admin.billing.quotes.show', $invoice->quote) }}"><x-icon name="file-text" :size="16"/> From quotation {{ $invoice->quote->number }}</a>@endif
        @if(! $isVoid && (float) $invoice->amount_paid <= 0)<button class="btn btn-danger" type="button" data-modal-open="#inv-void"><x-icon name="x-circle" :size="16"/> Void invoice</button>
        @elseif(! $isVoid)<p class="ac-hint" style="margin:0">To void this invoice, refund its payments first.</p>@endif
      </div>
    </section>

    @if($status !== 'draft')
    <section class="panel">
      <div class="panel-head"><h2>Customer pay link</h2></div>
      <div class="panel-body">
        <div class="ac-copy"><input class="input" type="text" readonly value="{{ $payLink }}" aria-label="Public invoice link"><button class="btn btn-secondary btn-sm" type="button" data-copy="{{ $payLink }}"><x-icon name="copy" :size="15"/> Copy</button></div>
        <p class="ac-hint" style="margin:10px 0 0">The customer can view the invoice, download the PDF and upload payment proof here.</p>
      </div>
    </section>
    @endif

    <section class="panel">
      <div class="panel-head"><h2>Email activity</h2></div>
      <div class="panel-body" style="padding-top:8px;padding-bottom:8px">@include('admin.billing._logs', ['logs' => $logs])</div>
    </section>
  </aside>
</div>

@if(! $isVoid && (float) $invoice->amount_paid <= 0)
<div class="modal" id="inv-void" role="dialog" aria-modal="true" aria-labelledby="inv-void-h">
  <div class="modal-box">
    <h2 id="inv-void-h" style="font-size:1.3rem">Void {{ $invoice->number }}?</h2>
    <p class="ac-modal-note">The invoice will stop counting as billed or outstanding and the customer's pay link will refuse payments. This cannot be undone.</p>
    <form method="post" action="{{ route('admin.billing.invoices.void', $invoice) }}">@csrf
      <div class="field"><label class="label" for="inv-void-reason">Reason <span class="req">*</span></label><textarea class="textarea" id="inv-void-reason" name="reason" rows="3" maxlength="300" required style="min-height:90px"></textarea></div>
      <div class="ac-modal-actions"><button class="btn btn-secondary" type="button" data-modal-close>Keep invoice</button><button class="btn btn-danger" type="submit">Void invoice</button></div>
    </form>
  </div>
</div>
@endif
@foreach($invoice->payments as $p)
  @if($p->status === 'pending')
  <div class="modal" id="rej-{{ $p->id }}" role="dialog" aria-modal="true" aria-labelledby="rej-h-{{ $p->id }}">
    <div class="modal-box">
      <h2 id="rej-h-{{ $p->id }}" style="font-size:1.3rem">Reject {{ money2($p->amount) }} payment</h2>
      <p class="ac-modal-note">The customer is emailed the reason and can submit a new proof from their invoice page.</p>
      <form method="post" action="{{ route('admin.billing.payments.reject', $p) }}">@csrf
        <div class="field"><label class="label" for="rej-r-{{ $p->id }}">Reason <span class="req">*</span></label><textarea class="textarea" id="rej-r-{{ $p->id }}" name="reason" rows="3" maxlength="300" required placeholder="e.g. Transaction ID not found in our bank statement" style="min-height:90px"></textarea></div>
        <div class="ac-modal-actions"><button class="btn btn-secondary" type="button" data-modal-close>Cancel</button><button class="btn btn-danger" type="submit">Reject &amp; email customer</button></div>
      </form>
    </div>
  </div>
  @elseif($p->status === 'paid')
  <div class="modal" id="ref-{{ $p->id }}" role="dialog" aria-modal="true" aria-labelledby="ref-h-{{ $p->id }}">
    <div class="modal-box">
      <h2 id="ref-h-{{ $p->id }}" style="font-size:1.3rem">Refund {{ money2($p->amount) }}</h2>
      <p class="ac-modal-note">Marks receipt {{ $p->receipt_no }} as refunded and recalculates the invoice balance. Money is not moved automatically — return it to the customer yourself.</p>
      <form method="post" action="{{ route('admin.billing.payments.refund', $p) }}">@csrf
        <div class="field"><label class="label" for="ref-r-{{ $p->id }}">Reason (optional)</label><textarea class="textarea" id="ref-r-{{ $p->id }}" name="reason" rows="3" maxlength="300" style="min-height:90px"></textarea></div>
        <div class="ac-modal-actions"><button class="btn btn-secondary" type="button" data-modal-close>Cancel</button><button class="btn btn-danger" type="submit">Mark as refunded</button></div>
      </form>
    </div>
  </div>
  @endif
@endforeach
@endsection