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// SPDX-FileCopyrightText: 2025 Shota FUJI <pockawoooh@gmail.com>
// SPDX-License-Identifier: AGPL-3.0-only

package migrations

import (
	"database/sql"
	"fmt"
	"log/slog"
)

func Run(db *sql.DB, logger *slog.Logger, migrations []Migration) error {
	logger.Debug("Starting migration process")

	var currentVersion uint
	row := db.QueryRow("PRAGMA user_version")
	if err := row.Scan(&currentVersion); err != nil {
		logger.Error("Failed to get current schema version", "error", err)
		return err
	}

	logger.Debug("Got current schema version", "version", currentVersion)

	for _, m := range migrations {
		v := m.Version()
		logger := logger.With("version", v)

		if v <= currentVersion {
			logger.Debug("Skipping already applied migration")
			continue
		}

		logger.Debug("Running migration")

		tx, err := db.Begin()
		if err != nil {
			return err
		}

		if err := m.Run(tx); err != nil {
			logger.Error("Failed to run migration", "error", err)
			return tx.Rollback()
		}

		if _, err := tx.Exec(fmt.Sprintf("PRAGMA user_version = %d", v)); err != nil {
			logger.Error("Failed to update database schema version", "error", err)
			return err
		}
		currentVersion = v

		if err := tx.Commit(); err != nil {
			return err
		}

		logger.Info("Completed migration")
	}

	logger.Debug("Migration process completed")

	return nil
}