package database

import (
	"database/sql"
	"time"

	_ "github.com/mattn/go-sqlite3"
)

func NewSQLiteDB(config *Config) (*sql.DB, error) {
	db, err := sql.Open("sqlite3", config.Path)
	if err != nil {
		if config.Path == "" {
			return nil, NewError("open", ErrInvalidPath, "database path is required")
		}
		return nil, NewError("open", ErrConnectionFailed, err.Error())
	}

	// Test connection
	if err := db.Ping(); err != nil {
		return nil, NewError("ping", ErrConnectionFailed, "failed to verify database connection")
	}

	// Set connection pool settings
	db.SetMaxOpenConns(config.MaxOpenConns)
	db.SetMaxIdleConns(config.MaxIdleConns)
	db.SetConnMaxLifetime(time.Duration(config.ConnMaxLifetime) * time.Second)

	// Apply pragmas if specified
	if len(config.Pragmas) > 0 {
		for _, pragma := range config.Pragmas {
			_, err := db.Exec(pragma)
			if err != nil {
				return nil, NewQueryError("pragma", pragma, ErrPragmaFailed, err.Error())
			}
		}
	}

	return db, nil
}