package accounts

// to generate StoreWithContext
//go:generate concurry -s Store

import (
	"context"
	"errors"
	"fmt"
	"ruben/inventory2/internal/consts"
	"ruben/inventory2/internal/logging"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5"
	"github.com/jackc/pgx/v5/pgxpool"
)

type (
	Store struct {
		log *logging.Logger
		db  *pgxpool.Pool
	}

	Account struct {
		AccountIDs
		OAuthUser
		Email string
	}

	OAuthUser struct {
		UserID string
	}

	AccountShop struct {
		AccountShopIDs
		Name string
	}

	Listing struct {
		AccountShopListingIDs
		SKU         string
		Name        string
		Description string
		Count       int64
	}

	// ids

	AccountIDs struct {
		AccountID int64
	}

	AccountShopIDs struct {
		AccountIDs
		Platform Platform
		ShopID   string
	}

	AccountShopListingIDs struct {
		AccountShopIDs
		ListingID string
	}

	MockShop struct {
		AccountShopIDs
		Name string
	}
)

func NewStore(logger *logging.Logger, db *pgxpool.Pool) *Store {
	return &Store{
		log: logger,
		db:  db,
	}
}

func (db *Store) WithContext(ctx context.Context) *StoreWithContext {
	return NewStoreWithContext(ctx, db)
}

func (db *Store) CreateAccount(ctx context.Context, userID, email string) (Account, error) {
	rows, err := db.db.Query(
		ctx,
		`
			INSERT INTO accounts (
				user_id,
				email
			)
			VALUES (
				@user_id,
				@email
			)
			ON CONFLICT DO NOTHING
			RETURNING
				account_id
		`,
		pgx.NamedArgs{
			"user_id": userID,
			"email":   email,
		},
	)
	if err != nil {
		return Account{}, fmt.Errorf("failed to perform query: %w", err)
	}

	acctID, err := pgx.CollectExactlyOneRow(rows, pgx.RowTo[int64])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return Account{}, fmt.Errorf("account already exists: %w", consts.ErrConflict)
		}
		return Account{}, fmt.Errorf("failed to scan row: %w", err)
	}

	return Account{
		OAuthUser: OAuthUser{
			UserID: userID,
		},
		AccountIDs: AccountIDs{
			AccountID: acctID,
		},
		Email: email,
	}, nil
}

func (db *Store) GetAccount(ctx context.Context, id int64) (Account, error) {
	rows, err := db.db.Query(
		ctx,
		"SELECT email, user_id FROM accounts WHERE account_id = @account_id",
		pgx.NamedArgs{
			"account_id": id,
		},
	)
	if err != nil {
		return Account{}, fmt.Errorf("failed to perform query: %w", err)
	}

	type Row struct {
		Email   string
		User_id string
	}

	r, err := pgx.CollectExactlyOneRow(rows, pgx.RowToStructByNameLax[Row])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return Account{}, consts.ErrNotFound
		}

		return Account{}, fmt.Errorf("failed to scan row: %w", err)
	}

	return Account{
		AccountIDs: AccountIDs{
			AccountID: id,
		},
		OAuthUser: OAuthUser{
			r.User_id,
		},
		Email: r.Email,
	}, nil
}

func (db *Store) GetAccountByUserID(ctx context.Context, userID string) (Account, error) {
	rows, err := db.db.Query(
		ctx,
		`SELECT
			email, account_id
		FROM
			accounts
		WHERE
			user_id = @user_id`,
		pgx.NamedArgs{
			"user_id": userID,
		},
	)
	if err != nil {
		return Account{}, fmt.Errorf("failed to perform query: %w", err)
	}

	type Row struct {
		Email      string
		Account_ID int64
	}

	r, err := pgx.CollectExactlyOneRow(rows, pgx.RowToStructByNameLax[Row])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return Account{}, consts.ErrNotFound
		}

		return Account{}, fmt.Errorf("failed to scan row: %w", err)
	}

	return Account{
		AccountIDs: AccountIDs{
			AccountID: r.Account_ID,
		},
		OAuthUser: OAuthUser{
			UserID: userID,
		},
		Email: r.Email,
	}, nil
}

func (db *Store) GetAccountByEmail(ctx context.Context, email string) (Account, error) {
	rows, err := db.db.Query(
		ctx,
		"SELECT account_id, user_id FROM accounts WHERE email = @email",
		pgx.NamedArgs{
			"email": email,
		},
	)
	if err != nil {
		return Account{}, fmt.Errorf("failed to perform query: %w", err)
	}

	type Row struct {
		Account_id int64
		User_id    string
	}

	r, err := pgx.CollectExactlyOneRow(rows, pgx.RowToStructByNameLax[Row])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return Account{}, consts.ErrNotFound
		}

		return Account{}, fmt.Errorf("failed to scan row: %w", err)
	}

	return Account{
		AccountIDs: AccountIDs{
			AccountID: r.Account_id,
		},
		OAuthUser: OAuthUser{
			UserID: r.User_id,
		},
		Email: email,
	}, nil
}

func (db *Store) GetUserAndAccountByAccessToken(ctx context.Context, accessToken string) (OAuthUser, *Account, error) {
	rows, err := db.db.Query(
		ctx,
		`
			SELECT
				u.user_id,
				a.account_id,
				a.email
			FROM oauth_users u
			LEFT JOIN oauth_tokens t
				ON u.user_id = id_token_subject
			LEFT JOIN accounts a
				USING (user_id)
			WHERE access_token = @access_token
		`,
		pgx.NamedArgs{
			"access_token": accessToken,
		},
	)
	if err != nil {
		return OAuthUser{}, nil, fmt.Errorf("failed to perform query: %w", err)
	}

	type Row struct {
		User_ID    string
		Account_ID *int64
		Email      *string
	}

	r, err := pgx.CollectExactlyOneRow(rows, pgx.RowToStructByNameLax[Row])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return OAuthUser{}, nil, consts.ErrNotFound
		}
		return OAuthUser{}, nil, fmt.Errorf("failed to scan row: %w", err)
	}

	user := OAuthUser{UserID: r.User_ID}

	var acct *Account
	if r.Account_ID != nil {
		acct = &Account{
			AccountIDs: AccountIDs{
				AccountID: *r.Account_ID,
			},
			OAuthUser: user,
			Email:     *r.Email,
		}
	}

	return user, acct, nil
}

func (db *Store) GetShops(ctx context.Context, acctID int64) ([]AccountShop, error) {
	var shops []AccountShop
	for _, v := range getDevShops(acctID) {
		shops = append(shops, v)
	}

	return shops, nil
}

func (db *Store) GetListingsForShop(ctx context.Context, acctID int64, platform Platform, shopID string) ([]Listing, error) {
	var vs []Listing
	for _, v := range getDevListings(acctID) {
		if v.Platform != platform {
			continue
		}
		if v.ShopID != shopID {
			continue
		}
		vs = append(vs, v)
	}

	return vs, nil
}

func (db *Store) CreateMockShop(ctx context.Context, acctID int64, platform Platform, name string) (shopID uuid.UUID, err error) {
	shopTableName, err := getMockShopTableName(platform)
	if err != nil {
		return uuid.Nil, err
	}

	tx, err := db.db.Begin(ctx)
	if err != nil {
		return uuid.Nil, fmt.Errorf("failed to being transaction: %w", err)
	}
	defer tx.Rollback(ctx)

	// TODO: are we really going to just copy the id between accounts and mock.accounts?

	// upsert mock account

	rows, err := tx.Query(
		ctx,
		`
			WITH existing_account(account_id, user_id) AS (
				SELECT
					account_id,
					user_id
				FROM
					accounts
				WHERE
					account_id = @account_id
			), existing_mock_account AS (
				SELECT
					user_id
				FROM
					accounts
				WHERE
					account_id = @account_id
			), inserted_mock_account AS (
				INSERT INTO
					mock.accounts (
						account_id,
						user_id
					)
				SELECT
					account_id,
					user_id
				FROM
					existing_account
				ON CONFLICT
					DO NOTHING
				RETURNING
					user_id
			)
			SELECT
				COALESCE(ia.user_id, ea.user_id)
			FROM
				inserted_mock_account ia
			FULL OUTER JOIN
				existing_mock_account ea
			USING
				(user_id)
		`,
		pgx.NamedArgs{
			"account_id": acctID,
		},
	)
	if err != nil {
		return uuid.Nil, fmt.Errorf("test query failed: %w", err)
	}

	userID, err := pgx.CollectExactlyOneRow(rows, pgx.RowTo[string])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return uuid.Nil, fmt.Errorf("%w: account not found", consts.ErrNotFound)
		}
		return uuid.Nil, fmt.Errorf("failed to scan rows: %w", err)
	}

	// create the mock shop

	shopID = uuid.New()

	_, err = tx.Exec(
		ctx,
		fmt.Sprintf(
			`
				INSERT INTO
					%s (
						user_id,
						account_id,
						shop_id,
						name
					)
				VALUES (
					@user_id,
					@account_id,
					@shop_id,
					@name
				)
			`,
			shopTableName,
		),
		pgx.NamedArgs{
			"account_id": acctID,
			"user_id":    userID,
			"shop_id":    shopID,
			"name":       name,
		},
	)
	if err != nil {
		return uuid.Nil, fmt.Errorf("failed to perform query to create mock shop: %w", err)
	}

	if err := tx.Commit(ctx); err != nil {
		return uuid.Nil, fmt.Errorf("failed to commit transaction: %w", err)
	}

	return shopID, nil
}

func (db *Store) ListMockShopsForPlatform(ctx context.Context, acctID int64, platform Platform) ([]MockShop, error) {
	shopTableName, err := getMockShopTableName(platform)
	if err != nil {
		return nil, err
	}

	rows, err := db.db.Query(
		ctx,
		fmt.Sprintf(
			`
				SELECT
					shop_id,
					name
				FROM
					%s
				WHERE
					account_id = @account_id
			`,
			shopTableName,
		),
		pgx.NamedArgs{
			"account_id": acctID,
		},
	)
	if err != nil {
		return nil, fmt.Errorf("failed to perform query: %w", err)
	}

	vs, err := pgx.CollectRows(rows, pgx.RowToStructByNameLax[struct {
		Shop_id uuid.UUID
		Name    string
	}])
	if err != nil {
		return nil, fmt.Errorf("failed to scan rows: %w", err)
	}

	shops := make([]MockShop, len(vs))
	for i, v := range vs {
		shops[i] = MockShop{
			AccountShopIDs: AccountShopIDs{
				AccountIDs: AccountIDs{
					AccountID: acctID,
				},
				Platform: platform,
				ShopID:   v.Shop_id.String(),
			},
			Name: v.Name,
		}
	}

	return shops, nil
}

func (db *Store) GetMockShop(ctx context.Context, acctID int64, platform Platform, shopID string) (*MockShop, error) {
	shopTableName, err := getMockShopTableName(platform)
	if err != nil {
		return nil, err
	}

	rows, err := db.db.Query(
		ctx,
		fmt.Sprintf(
			`
				SELECT
					name
				FROM
					%s
				WHERE
					account_id = @account_id
					AND shop_id = @shop_id
			`,
			shopTableName,
		),
		pgx.NamedArgs{
			"account_id": acctID,
			"shop_id":    shopID,
		},
	)
	if err != nil {
		return nil, fmt.Errorf("failed to perform query: %w", err)
	}

	name, err := pgx.CollectExactlyOneRow(rows, pgx.RowTo[string])
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return nil, consts.ErrNotFound
		}
		return nil, fmt.Errorf("failed to scan rows: %w", err)
	}

	return &MockShop{
		AccountShopIDs: AccountShopIDs{
			AccountIDs: AccountIDs{
				AccountID: acctID,
			},
			Platform: platform,
			ShopID:   shopID,
		},
		Name: name,
	}, nil
}

func getMockShopTableName(platform Platform) (string, error) {
	switch platform {
	case Amazon:
		return "mock.shop_amazon", nil
	case BigCartel:
		return "mock.shop_big_cartel", nil
	case Ebay:
		return "mock.shop_ebay", nil
	case Ecwid:
		return "mock.shop_ecwid", nil
	case Etsy:
		return "mock.shop_etsy", nil
	case Shopify:
		return "mock.shop_shopify", nil
	case SquareOnline:
		return "mock.shop_square_online", nil
	case Squarespace:
		return "mock.shop_squarespace", nil
	case Tiktok:
		return "mock.shop_tiktok", nil
	case WalmartMarketplace:
		return "mock.shop_walmart_marketplace", nil
	case Wix:
		return "mock.shop_wix", nil
	case WooCommerce:
		return "mock.shop_woo_commerce", nil
	case Zoho:
		return "mock.shop_zoho", nil
	default:
		return "", fmt.Errorf("%w: unrecognized platform", consts.ErrBadRequest)
	}
}

// additional context

func (db *Store) GetAccountPointerByUserID(ctx context.Context, userID string) (*Account, error) {
	acct, err := db.GetAccountByUserID(ctx, userID)
	if err == nil {
		return &acct, nil
	}
	if errors.Is(err, consts.ErrNotFound) {
		return nil, nil
	}
	return nil, err
}