package db

import (
	"context"
	"database/sql"
	"errors"
	"fmt"

	"github.com/jmoiron/sqlx"
	"golang.org/x/sync/errgroup"
)

type Files struct {
	ID uint

	Storages []FilesStorage
}

func (f *Files) Query(data *InsertId[uint]) {
	data.query = fmt.Sprintf(`
		INSERT INTO files (%s)
		VALUES ($1)
		RETURNING id`, data.fieldName)
}

func (f *Files) Insert(tx *sqlx.Tx, data *InsertId[uint]) error {
	if data.query == "" {
		return ErrNoQuery
	}

	args := []any{data.id}

	err := tx.QueryRowx(data.query, args...).Scan(&f.ID)
	if err != nil {
		return err
	}

	group, _ := errgroup.WithContext(context.Background())

	InsertSliceParallel(group, tx, f.Storages, InsertId[uint]{id: f.ID})

	err = group.Wait()
	if err != nil && !errors.Is(err, sql.ErrNoRows) {
		return err
	}
	return nil
}

func (f *Files) InsertCtx(ctx context.Context, tx *sqlx.Tx, data *InsertId[uint]) error {
	if data.query == "" {
		return ErrNoQuery
	}

	args := []any{data.id}

	err := tx.QueryRowxContext(ctx, data.query, args...).Scan(&f.ID)
	if err != nil {
		return err
	}

	group, _ := errgroup.WithContext(context.Background())

	InsertSliceParallel(group, tx, f.Storages, InsertId[uint]{id: f.ID})

	err = group.Wait()
	if err != nil && !errors.Is(err, sql.ErrNoRows) {
		return err
	}
	return nil
}

type FilesStorage struct {
	ID uint

	Storage string
}

func (f FilesStorage) Query(data *InsertId[uint]) {
	data.query = `
		INSERT INTO files_storage (files_id, storage)
		VALUES ($1, $2)
		RETURNING id`
}

func (f FilesStorage) Insert(tx *sqlx.Tx, data *InsertId[uint]) error {
	if data.query == "" {
		return ErrNoQuery
	}

	args := []any{data.id, f.Storage}

	err := tx.QueryRowx(data.query, args...).Scan(&f.ID)
	if err != nil {
		return err
	}

	return nil
}

func (f FilesStorage) InsertCtx(ctx context.Context, tx *sqlx.Tx, data *InsertId[uint]) error {
	if data.query == "" {
		return ErrNoQuery
	}

	args := []any{data.id, f.Storage}

	err := tx.QueryRowxContext(ctx, data.query, args...).Scan(&f.ID)
	if err != nil {
		return err
	}

	return nil
}