<?php
/**
 * API Endpoint: Get Daily Blocks
 * Returns active blocks for a specific date
 */

require_once __DIR__ . '/../vendor/autoload.php';
require_once __DIR__ . '/../helpers.php';

use Dotenv\Dotenv;

$dotenv = Dotenv::createImmutable(__DIR__ . '/..');
$dotenv->load();

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

try {
    $db = getDbConnection();
    
    $date = $_GET['date'] ?? date('Y-m-d');
    
    if (!isValidDate($date)) {
        jsonResponse([
            'error' => 'Invalid date format'
        ], 400);
    }
    
    // Ensure daily blocks exist for this date
    ensureDailyBlocks($db, $date, $date);
    
    // Get all blocks for this date
    $stmt = $db->prepare("
        SELECT 
            db.*,
            bt.name as template_name,
            bt.channel
        FROM daily_blocks db
        LEFT JOIN block_templates bt ON db.template_id = bt.id
        WHERE db.block_date = ?
        ORDER BY db.channel, db.actual_start_time
    ");
    $stmt->execute([$date]);
    $blocks = $stmt->fetchAll();
    
    // Format for calendar background events - assign to correct resource
    $backgroundEvents = [];
    foreach ($blocks as $block) {
        $startDateTime = $date . 'T' . $block['actual_start_time'];
        $endDateTime = $date . 'T' . ($block['actual_end_time'] ?? '23:59:59');
        
        // Handle overnight blocks
        if ($block['actual_end_time'] && $block['actual_end_time'] < $block['actual_start_time']) {
            $endDateTime = date('Y-m-d', strtotime($date . ' +1 day')) . 'T' . $block['actual_end_time'];
        }
        
        $backgroundEvents[] = [
            'id' => 'block_' . $block['id'],
            'title' => $block['template_name'] ?? 'Blok',
            'start' => $startDateTime,
            'end' => $endDateTime,
            'resourceId' => $block['channel'], // Assign to specific resource/channel
            'display' => 'background',
            'backgroundColor' => getBlockColor($block['channel']),
            'extendedProps' => [
                'type' => 'block',
                'block_id' => $block['id'],
                'channel' => $block['channel'],
                'template_name' => $block['template_name']
            ]
        ];
    }
    
    jsonResponse([
        'blocks' => $blocks,
        'backgroundEvents' => $backgroundEvents
    ]);
    
} catch (Exception $e) {
    jsonResponse([
        'error' => $e->getMessage()
    ], 500);
}

/**
 * Get color for block background based on channel
 */
function getBlockColor($channel) {
    $colors = [
        'SBS9' => 'rgba(52, 152, 219, 0.1)',      // Light blue
        'NET5' => 'rgba(231, 76, 60, 0.1)',       // Light red
        'VERONICA' => 'rgba(155, 89, 182, 0.1)'   // Light purple
    ];
    
    return $colors[$channel] ?? 'rgba(200, 200, 200, 0.1)';
}