package storage

import (
	"context"
	"database/sql"
	_ "embed"
	"fmt"

	_ "modernc.org/sqlite"
)

//go:embed migrations/001_create_audit_records.sql
var auditMigration string

func OpenSQLite(path string) (*sql.DB, error) {
	db, err := sql.Open("sqlite", path)
	if err != nil {
		return nil, fmt.Errorf("open sqlite database: %w", err)
	}

	// SQLite permits only one writer at a time.
	// Keeping a small connection pool makes behavior predictable
	// for this assessment-sized service.
	db.SetMaxOpenConns(1)

	if err := db.Ping(); err != nil {
		db.Close()

		return nil, fmt.Errorf("ping sqlite database: %w", err)
	}

	return db, nil
}

func Migrate(
	ctx context.Context,
	db *sql.DB,
) error {
	if _, err := db.ExecContext(
		ctx,
		auditMigration,
	); err != nil {
		return fmt.Errorf("apply audit migration: %w", err)
	}

	return nil
}