<?php

class DatabaseInstaller {
    public static function isInstalled() {
        require_once __DIR__ . '/../db/config.php';
        try {
            $db = db();
            $stmt = $db->query("SHOW TABLES LIKE 'users'");
            return $stmt->fetch() !== false;
        } catch (PDOException $e) {
            return false;
        }
    }

    public static function install() {
        require_once __DIR__ . '/../db/config.php';
        
        $schemaFile = __DIR__ . '/../db/schema.sql';
        $seedFile = __DIR__ . '/../db/seed.sql';

        if (!file_exists($schemaFile)) {
            throw new Exception("Schema file not found at $schemaFile");
        }

        self::executeSqlFile($schemaFile);

        if (file_exists($seedFile)) {
            self::executeSqlFile($seedFile);
        }

        return true;
    }

    private static function executeSqlFile($filePath) {
        // Use constants from db/config.php
        $host = DB_HOST;
        $name = DB_NAME;
        $user = DB_USER;
        $pass = DB_PASS;

        $command = sprintf(
            'mysql -h %s -u %s -p%s %s < %s',
            escapeshellarg($host),
            escapeshellarg($user),
            escapeshellarg($pass),
            escapeshellarg($name),
            escapeshellarg($filePath)
        );

        $output = [];
        $returnVar = 0;
        exec($command . ' 2>&1', $output, $returnVar);

        if ($returnVar !== 0) {
            throw new Exception("Failed to execute SQL file: " . implode("\n", $output));
        }
    }
}