<?php
// api/dashboard.php
require_once dirname(__DIR__) . '/config/database.php';
require_once dirname(__DIR__) . '/models/Job.php';

header('Content-Type: application/json');

// Need to be logged in
session_start();
if (!isset($_SESSION['user_id'])) {
    echo json_encode(['status' => 'error', 'message' => 'Unauthorized']);
    exit;
}

$conn = Database::getInstance();

// 1. Fetch Stats
$stats_query = "
    SELECT 
        COUNT(*) as total,
        SUM(CASE WHEN status = 'pending' THEN 1 ELSE 0 END) as pending,
        SUM(CASE WHEN status IN ('assigned', 'in_progress', 'waiting_for_return') THEN 1 ELSE 0 END) as in_progress,
        SUM(CASE WHEN status = 'completed' THEN 1 ELSE 0 END) as completed
    FROM jobs
    WHERE DATE(created_at) = CURDATE()
";
$stmt = $conn->query($stats_query);
$stats = $stmt->fetch();

// 2. Fetch Latest Jobs (Limit 10)
$jobs_query = "
    SELECT j.*, 
           fd.name as from_dept, 
           COALESCE(td.name, j.to_department_custom) as to_dept
    FROM jobs j
    LEFT JOIN departments fd ON j.from_department_id = fd.id
    LEFT JOIN departments td ON j.to_department_id = td.id
    ORDER BY j.created_at DESC
    LIMIT 10
";
$stmt2 = $conn->query($jobs_query);
$jobs = $stmt2->fetchAll();

// 3. Fetch Online Staff
$staff_query = "
    SELECT id, username, full_name, status 
    FROM users 
    WHERE role IN ('staff', 'nurse') 
      AND status != 'offline'
    ORDER BY status DESC, username ASC
";
$stmt3 = $conn->query($staff_query);
$staff = $stmt3->fetchAll();

echo json_encode([
    'status' => 'success',
    'data' => [
        'stats' => [
            'total' => $stats['total'] ?? 0,
            'pending' => $stats['pending'] ?? 0,
            'in_progress' => $stats['in_progress'] ?? 0,
            'completed' => $stats['completed'] ?? 0
        ],
        'jobs' => $jobs,
        'staff' => $staff
    ]
]);