package postgres

import (
	"context"
	"database/sql"
	"github.com/Masterminds/squirrel"
	"github.com/gissleh/stufflog/internal/slerrors"
	"github.com/gissleh/stufflog/models"
	"github.com/jmoiron/sqlx"
)

type itemRepository struct {
	db *sqlx.DB
}

func (r *itemRepository) Find(ctx context.Context, id string) (*models.Item, error) {
	res := models.Item{}
	err := r.db.GetContext(ctx, &res, "SELECT item.*, g.icon FROM item INNER JOIN \"group\" AS g ON item.group_id = g.group_id WHERE item_id=$1", id)
	if err != nil {
		if err == sql.ErrNoRows {
			return nil, slerrors.NotFound("Item")
		}

		return nil, err
	}

	return &res, nil
}

func (r *itemRepository) List(ctx context.Context, filter models.ItemFilter) ([]*models.Item, error) {
	sq := squirrel.Select("item.*", "g.icon").From("item").PlaceholderFormat(squirrel.Dollar)
	sq = sq.Where(squirrel.Eq{"item.user_id": filter.UserID})
	if len(filter.IDs) > 0 {
		sq = sq.Where(squirrel.Eq{"item.item_id": filter.IDs})
	}
	if len(filter.GroupIDs) > 0 {
		sq = sq.Where(squirrel.Eq{"item.group_id": filter.GroupIDs})
	}

	sq = sq.InnerJoin("\"group\" AS g ON item.group_id = g.group_id")
	sq = sq.OrderBy("item.group_weight", "item.name")

	query, args, err := sq.ToSql()
	if err != nil {
		return nil, err
	}

	res := make([]*models.Item, 0, 8)
	err = r.db.SelectContext(ctx, &res, query, args...)
	if err != nil {
		if err == sql.ErrNoRows {
			return res, nil
		}
		return nil, err
	}

	return res, nil
}

func (r *itemRepository) Insert(ctx context.Context, item models.Item) error {
	_, err := r.db.NamedExecContext(ctx, `
		INSERT INTO item (
			item_id, user_id, group_id, group_weight, name, description
		) VALUES (
			:item_id, :user_id, :group_id, :group_weight, :name, :description
		)
	`, &item)
	if err != nil {
		return err
	}

	return nil
}

func (r *itemRepository) Update(ctx context.Context, item models.Item) error {
	_, err := r.db.NamedExecContext(ctx, `
		UPDATE item SET
			group_weight = :group_weight,
			name = :name,
			description = :description
		WHERE item_id=:item_id
	`, &item)
	if err != nil {
		return err
	}

	return nil
}

func (r *itemRepository) Delete(ctx context.Context, item models.Item) error {
	_, err := r.db.ExecContext(ctx, `DELETE FROM item WHERE item_id=$1`, item.ID)
	if err != nil {
		if err == sql.ErrNoRows {
			return slerrors.NotFound("Item")
		}
		return err
	}

	return nil
}