<?php
declare(strict_types=1);

namespace App;

final class BaseSchema
{
    public static function ensure(\PDO $pdo): void
    {
        $driver = (string)$pdo->getAttribute(\PDO::ATTR_DRIVER_NAME);
        if ($driver === 'pgsql') {
            self::ensurePgsql($pdo);
            return;
        }
        if ($driver === 'sqlite') {
            self::ensureSqlite($pdo);
            return;
        }
        self::ensureGeneric($pdo);
    }

    private static function ensurePgsql(\PDO $pdo): void
    {
        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_modules (
                name TEXT PRIMARY KEY,
                title TEXT,
                version TEXT,
                enabled BOOLEAN NOT NULL DEFAULT false,
                installed_at TIMESTAMPTZ,
                updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
            )"
        );

        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_module_settings (
                name TEXT PRIMARY KEY,
                settings TEXT NOT NULL DEFAULT '{}',
                updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
            )"
        );

        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_settings (
                key TEXT PRIMARY KEY,
                value TEXT,
                updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
            )"
        );

        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_users (
                id BIGSERIAL PRIMARY KEY,
                email TEXT NOT NULL UNIQUE,
                password_hash TEXT NOT NULL,
                role TEXT NOT NULL DEFAULT 'user',
                is_active BOOLEAN NOT NULL DEFAULT true,
                created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
            )"
        );
    }

    private static function ensureSqlite(\PDO $pdo): void
    {
        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_modules (
                name TEXT PRIMARY KEY,
                title TEXT,
                version TEXT,
                enabled INTEGER NOT NULL DEFAULT 0,
                installed_at TEXT,
                updated_at TEXT NOT NULL DEFAULT (datetime('now'))
            )"
        );

        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_module_settings (
                name TEXT PRIMARY KEY,
                settings TEXT NOT NULL DEFAULT '{}',
                updated_at TEXT NOT NULL DEFAULT (datetime('now'))
            )"
        );

        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_settings (
                key TEXT PRIMARY KEY,
                value TEXT,
                updated_at TEXT NOT NULL DEFAULT (datetime('now'))
            )"
        );

        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_users (
                id INTEGER PRIMARY KEY AUTOINCREMENT,
                email TEXT NOT NULL UNIQUE,
                password_hash TEXT NOT NULL,
                role TEXT NOT NULL DEFAULT 'user',
                is_active INTEGER NOT NULL DEFAULT 1,
                created_at TEXT NOT NULL DEFAULT (datetime('now'))
            )"
        );
    }

    private static function ensureGeneric(\PDO $pdo): void
    {
        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_modules (
                name VARCHAR(190) PRIMARY KEY,
                title VARCHAR(190),
                version VARCHAR(64),
                enabled TINYINT NOT NULL DEFAULT 0,
                installed_at DATETIME,
                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
            )"
        );

        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_module_settings (
                name VARCHAR(190) PRIMARY KEY,
                settings TEXT NOT NULL,
                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
            )"
        );

        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_settings (
                `key` VARCHAR(190) PRIMARY KEY,
                `value` TEXT,
                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
            )"
        );

        $pdo->exec(
            "CREATE TABLE IF NOT EXISTS nexus_users (
                id BIGINT AUTO_INCREMENT PRIMARY KEY,
                email VARCHAR(190) NOT NULL UNIQUE,
                password_hash TEXT NOT NULL,
                role VARCHAR(32) NOT NULL DEFAULT 'user',
                is_active TINYINT NOT NULL DEFAULT 1,
                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
            )"
        );
    }
}