<?php
header('Content-Type: application/json');
require_once __DIR__ . '/../db/config.php';

$pdo = db();
$action = $_GET['action'] ?? '';

if ($action === 'get_stats') {
    $today = date('Y-m-d');
    
    // Get goals
    $stmt = $pdo->query("SELECT goal_key, goal_value FROM user_goals");
    $goals = [];
    while ($row = $stmt->fetch()) {
        $goals[$row['goal_key']] = (float)$row['goal_value'];
    }
    
    // Get today's nutrition logs
    $stmt = $pdo->prepare("SELECT SUM(calories) as calories, SUM(protein) as protein, SUM(creatine) as creatine FROM nutrition_logs WHERE DATE(created_at) = ?");
    $stmt->execute([$today]);
    $stats = $stmt->fetch();

    // Get today's water
    $stmtW = $pdo->prepare("SELECT SUM(amount) as amount FROM water_logs WHERE logged_at = ?");
    $stmtW->execute([$today]);
    $waterStats = $stmtW->fetch();
    
    $consumed = [
        'calories' => (int)($stats['calories'] ?? 0),
        'protein' => (int)($stats['protein'] ?? 0),
        'creatine' => (float)($stats['creatine'] ?? 0),
        'water' => (float)($waterStats['amount'] ?? 0)
    ];
    
    echo json_encode([
        'goals' => $goals,
        'consumed' => $consumed,
        'remaining' => [
            'calories' => max(0, ($goals['calories'] ?? 0) - $consumed['calories']),
            'protein' => max(0, ($goals['protein'] ?? 0) - $consumed['protein']),
            'creatine' => max(0, ($goals['creatine'] ?? 0) - $consumed['creatine']),
            'water' => max(0, ($goals['water'] ?? 0) - $consumed['water'])
        ]
    ]);
    exit;
}

if ($action === 'add_log') {
    $input = json_decode(file_get_contents('php://input'), true);
    
    if (empty($input['entry_name'])) {
        echo json_encode(['error' => 'Name is required']);
        http_response_code(400);
        exit;
    }
    
    $stmt = $pdo->prepare("INSERT INTO nutrition_logs (entry_name, calories, protein, creatine) VALUES (?, ?, ?, ?)");
    $stmt->execute([
        $input['entry_name'],
        (int)($input['calories'] ?? 0),
        (int)($input['protein'] ?? 0),
        (float)($input['creatine'] ?? 0)
    ]);
    
    echo json_encode(['success' => true]);
    exit;
}

if ($action === 'get_recent') {
    $stmt = $pdo->query("SELECT * FROM nutrition_logs ORDER BY created_at DESC LIMIT 10");
    echo json_encode($stmt->fetchAll());
    exit;
}

if ($action === 'update_goals') {
    $input = json_decode(file_get_contents('php://input'), true);
    
    $stmt = $pdo->prepare("INSERT INTO user_goals (goal_key, goal_value) VALUES (?, ?) ON DUPLICATE KEY UPDATE goal_value = VALUES(goal_value)");
    
    $allowedKeys = ['calories', 'protein', 'creatine', 'water', 'weight'];
    foreach ($input as $key => $value) {
        if (in_array($key, $allowedKeys)) {
            $stmt->execute([$key, (float)$value]);
        }
    }
    
    echo json_encode(['success' => true]);
    exit;
}