package db

import (
	"time"

	gormigrate "github.com/go-gormigrate/gormigrate/v2"
	"github.com/google/uuid"
	"gorm.io/gorm"
)

// Gormigrate returns a Gormigrate migrator for the database.
func Gormigrate(db *gorm.DB) *gormigrate.Gormigrate {
	return gormigrate.New(db, gormigrate.DefaultOptions, []*gormigrate.Migration{
		{
			ID: "202010251337",
			Migrate: func(tx *gorm.DB) error {
				type FileUpload struct {
					ID          uint            `gorm:"primaryKey"`
					State       FileUploadState `gorm:"index"`
					PubID       uuid.UUID       `gorm:"uniqueIndex"`
					FileName    string
					ContentType string
					Checksum    uint32
					CreatedAt   time.Time
					UpdatedAt   time.Time
					DeletedAt   gorm.DeletedAt
				}
				type Paste struct {
					ID          uint       `gorm:"primaryKey"`
					Type        PasteType  `gorm:"index"`
					State       PasteState `gorm:"index"`
					Content     []byte
					Key         string `gorm:"uniqueIndex"`
					DeleteToken string
					CreatedAt   time.Time
					UpdatedAt   time.Time
					DeletedAt   gorm.DeletedAt
				}
				return tx.AutoMigrate(&FileUpload{}, &Paste{})
			},
			Rollback: func(tx *gorm.DB) error {
				return tx.Migrator().DropTable(&FileUpload{}, &Paste{})
			},
		},
		{
			ID: "202304301337",
			Migrate: func(tx *gorm.DB) error {
				type User struct {
					ID        uint   `gorm:"primaryKey"`
					User      string `gorm:"uniqueIndex"`
					Password  string
					Admin     bool
					CreatedAt time.Time
					UpdatedAt time.Time
					DeletedAt gorm.DeletedAt
				}
				type FileUpload struct {
					ID          uint            `gorm:"primaryKey"`
					State       FileUploadState `gorm:"index"`
					PubID       uuid.UUID       `gorm:"uniqueIndex"`
					CreatedBy   uint            `gorm:"index"`
					FileName    string
					ContentType string
					Checksum    uint32
					CreatedAt   time.Time
					UpdatedAt   time.Time
					DeletedAt   gorm.DeletedAt
				}
				type Paste struct {
					ID          uint       `gorm:"primaryKey"`
					Type        PasteType  `gorm:"index"`
					State       PasteState `gorm:"index"`
					CreatedBy   uint       `gorm:"index"`
					Content     []byte
					Key         string `gorm:"uniqueIndex"`
					DeleteToken string
					CreatedAt   time.Time
					UpdatedAt   time.Time
					DeletedAt   gorm.DeletedAt
				}
				return tx.AutoMigrate(&User{}, &FileUpload{}, &Paste{})
			},
			Rollback: func(tx *gorm.DB) error {
				if err := tx.Migrator().DropTable(&User{}); err != nil {
					return err
				}
				if err := tx.Migrator().DropColumn(&FileUpload{}, "CreatedBy"); err != nil {
					return err
				}
				if err := tx.Migrator().DropColumn(&Paste{}, "CreatedBy"); err != nil {
					return err
				}
				return nil
			},
		},
	})
}