package database

import (
	"database/sql"
	"fmt"
	"os"
	"path/filepath"

	_ "modernc.org/sqlite"
)

// OpenDatabase opens a SQLite database connection with WAL mode enabled
func OpenDatabase(path string) (*sql.DB, error) {
	// Ensure directory exists
	dir := filepath.Dir(path)
	if err := os.MkdirAll(dir, 0755); err != nil {
		return nil, fmt.Errorf("failed to create database directory: %w", err)
	}

	// Open database with connection parameters
	dsn := fmt.Sprintf("%s?_journal_mode=WAL&_busy_timeout=5000&_synchronous=NORMAL&_cache_size=10000&_foreign_keys=ON", path)
	db, err := sql.Open("sqlite", dsn)
	if err != nil {
		return nil, fmt.Errorf("failed to open database: %w", err)
	}

	// Configure connection pool
	db.SetMaxOpenConns(25)
	db.SetMaxIdleConns(5)

	// Verify connection
	if err := db.Ping(); err != nil {
		db.Close()
		return nil, fmt.Errorf("failed to ping database: %w", err)
	}

	return db, nil
}