package setup

import (
	"context"
	"database/sql"
	"net/url"
	"sync"

	"forge.cadoles.com/Cadoles/emissary/internal/config"
	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
	"forge.cadoles.com/Cadoles/emissary/internal/datastore/sqlite"
	"github.com/jackc/pgx/v5/pgxpool"
	"github.com/pkg/errors"
	"gitlab.com/wpetit/goweb/logger"
)

var (
	postgresPoolOnce sync.Once
	postgresPoolErr  error
	postgresPool     *pgxpool.Pool
)

func openPostgresPool(ctx context.Context, dsn string) (*pgxpool.Pool, error) {
	postgresPoolOnce.Do(func() {
		postgresPool, postgresPoolErr = pgxpool.New(ctx, dsn)
	})
	if postgresPoolErr != nil {
		return nil, errors.WithStack(postgresPoolErr)
	}

	return postgresPool, nil
}

func NewAgentRepository(ctx context.Context, conf config.DatabaseConfig) (datastore.AgentRepository, error) {
	driver := string(conf.Driver)
	dsn := string(conf.DSN)

	var agentRepository datastore.AgentRepository

	logger.Debug(ctx, "initializing agent repository", logger.F("driver", driver), logger.F("dsn", dsn))

	switch driver {
	case config.DatabaseDriverPostgres:
		// TODO
		// pool, err := openPostgresPool(ctx, dsn)
		// if err != nil {
		// 	return nil, errors.WithStack(err)
		// }

		// entryRepository = postgres.NewEntryRepository(pool)
	case config.DatabaseDriverSQLite:
		url, err := url.Parse(dsn)
		if err != nil {
			return nil, errors.WithStack(err)
		}

		db, err := sql.Open(driver, url.Host+url.Path)
		if err != nil {
			return nil, errors.WithStack(err)
		}

		agentRepository = sqlite.NewAgentRepository(db)

	default:
		return nil, errors.Errorf("unsupported database driver '%s'", driver)
	}

	return agentRepository, nil
}