<?php
require '../../vendor/autoload.php';
require '../db.php';
require_once '../envLoader.php';
loadEnv(__DIR__ . '/../../.env');

include '../src/session_check.php';

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

try {
    // Fetch all filament prices with a limit of 180 entries per filament using JOIN
    $stmt = $pdo->query("
        SELECT ft.filamentName, 
               ft.brand,
               ft.material,
               ft.color,
               ft.amazonUrl,
               fp.price,
               fp.recordedAt
        FROM filamentTracker ft
        JOIN filamentPriceHistory fp ON ft.id = fp.filamentId
        JOIN (
            SELECT filamentId, recordedAt
            FROM (
                SELECT filamentId, recordedAt,
                    ROW_NUMBER() OVER (PARTITION BY filamentId ORDER BY recordedAt DESC) as rn
                FROM filamentPriceHistory
            ) ranked
            WHERE rn <= 180
        ) filtered ON fp.filamentId = filtered.filamentId AND fp.recordedAt = filtered.recordedAt
        ORDER BY ft.filamentName, fp.recordedAt ASC
    ");
    
    $filaments = $stmt->fetchAll(PDO::FETCH_ASSOC);

    $result = [];

    // Format data for charts (grouped by filament)
    foreach ($filaments as $filament) {
        $name = $filament['filamentName'];
        
        if (!isset($result[$name])) {
            $result[$name] = [
                'brand' => $filament['brand'],
                'material' => $filament['material'],
                'color' => $filament['color'],
                'amazonUrl' => $filament['amazonUrl'],
                'prices' => []
            ];
        }

        $result[$name]['prices'][] = [
            'price' => $filament['price'],
            'recordedAt' => $filament['recordedAt']
        ];
    }

    // Return as JSON
    echo json_encode([
        'status' => 'success',
        'data' => $result
    ], JSON_PRETTY_PRINT);
} catch (PDOException $e) {
    echo json_encode([
        'status' => 'error',
        'message' => 'Failed to fetch filament prices: ' . $e->getMessage()
    ]);
}
?>