@extends('layouts.portal')
@section('title', 'Exams')
@section('subtitle', 'Proctored certification assessments, their question banks and results.')
@section('actions')
  <a class="btn btn-primary" href="{{ route('admin.exams.create') }}"><x-icon name="plus" :size="16"/> New exam</a>
@endsection

@section('content')
@php
  $live = $exams->where('published', true)->count();
  $rated = $exams->whereNotNull('pass_rate');
  $avgRate = $rated->count() ? round($rated->avg('pass_rate')) : null;
  $lowBank = $exams->filter(fn ($e) => $e->active_questions_count < $e->question_count)->count();
@endphp

<div class="kpis">
  <div class="card kpi"><span class="ico"><x-icon name="clipboard-check" :size="22"/></span><span>Exams</span><b>{{ $exams->count() }}</b><small>{{ $live }} published</small></div>
  <div class="card kpi violet"><span class="ico"><x-icon name="list-checks" :size="22"/></span><span>Questions in banks</span><b>{{ number_format($exams->sum('questions_count')) }}</b><small>{{ number_format($exams->sum('active_questions_count')) }} active</small></div>
  <div class="card kpi green"><span class="ico"><x-icon name="check-circle" :size="22"/></span><span>Completed attempts</span><b>{{ number_format($exams->sum('finished')) }}</b><small>{{ $avgRate !== null ? 'Average pass rate '.$avgRate.'%' : 'No attempts yet' }}</small></div>
  <div class="card kpi {{ $lowBank ? 'amber' : '' }}"><span class="ico"><x-icon name="alert" :size="22"/></span><span>Banks needing questions</span><b>{{ $lowBank }}</b><small>Fewer active questions than the draw size</small></div>
</div>

<div class="filters">
  <div class="searchbox"><x-icon name="search" :size="18"/><input class="input" type="search" placeholder="Filter exams by title, code or course" aria-label="Filter exams" data-filter="#exam-rows" data-filter-item="tr"></div>
</div>

<div class="table-wrap">
  <table class="table" id="exam-rows">
    <thead>
      <tr><th>Exam</th><th>Course</th><th class="num">Questions</th><th>Format</th><th>Results</th><th>Badge</th><th>Status</th><th></th></tr>
    </thead>
    <tbody>
    @forelse($exams as $e)
      @php $short = $e->active_questions_count < $e->question_count; @endphp
      <tr data-filter-text="{{ strtolower($e->title.' '.$e->code.' '.($e->course?->title)) }}">
        <td>
          <a class="ab-cell-title" href="{{ route('admin.exams.show', $e) }}">{{ $e->title }}</a>
          <span class="ab-sub mono">{{ $e->code }}</span>
        </td>
        <td>@if($e->course)<a href="{{ route('admin.courses.edit', $e->course) }}">{{ \Illuminate\Support\Str::limit($e->course->title, 34) }}</a>@else<span class="muted">Not linked</span>@endif</td>
        <td class="num">
          <b>{{ $e->active_questions_count }}</b> <span class="muted">/ {{ $e->questions_count }}</span>
          <span class="ab-sub">draws {{ $e->question_count }}@if($short) · <span class="ab-warn">bank too small</span>@endif</span>
        </td>
        <td class="nowrap">
          {{ $e->duration_minutes }} min · pass {{ $e->pass_percent }}%
          <span class="ab-sub">{{ $e->max_attempts ? $e->max_attempts.' attempts' : 'Unlimited attempts' }} · {{ ucfirst($e->proctor_level) }} proctoring</span>
        </td>
        <td style="min-width:140px">
          @if($e->finished)
            <div class="between" style="gap:8px"><span class="small"><b>{{ $e->pass_rate }}%</b> pass</span><span class="xs muted">{{ $e->finished }} {{ \Illuminate\Support\Str::plural('attempt', $e->finished) }}</span></div>
            <div class="progress {{ $e->pass_rate >= 60 ? 'green' : ($e->pass_rate >= 35 ? 'amber' : 'red') }}" style="margin-top:6px" role="img" aria-label="Pass rate {{ $e->pass_rate }} percent"><i style="width:{{ $e->pass_rate }}%"></i></div>
          @else
            <span class="muted small">No attempts yet</span>
          @endif
        </td>
        <td>@if($e->badge)<a class="pill pill-violet" href="{{ route('admin.badges.edit', $e->badge) }}"><x-icon name="badge-check" :size="13"/> Linked</a>@else<span class="muted small">None</span>@endif</td>
        <td><x-pill :status="$e->published ? 'published' : 'draft'"/></td>
        <td class="actions">
          <a class="btn btn-secondary btn-sm" href="{{ route('admin.exams.show', $e) }}">Manage</a>
          <a class="icon-btn" href="{{ route('admin.exams.edit', $e) }}" aria-label="Edit {{ $e->title }} settings" title="Edit settings"><x-icon name="edit" :size="16"/></a>
        </td>
      </tr>
    @empty
      <tr><td colspan="8"><x-empty icon="clipboard-check" title="No exams yet" text="Create an exam, add questions or import a CSV, then link it to a course."><a class="btn btn-primary" href="{{ route('admin.exams.create') }}">Create the first exam</a></x-empty></td></tr>
    @endforelse
    </tbody>
  </table>
</div>
<p class="help mt-2">“Draws” is the number of questions picked at random from the active bank for each attempt. Only published exams are visible to learners.</p>
@endsection