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 groupRepository struct {
	db *sqlx.DB
}

func (r *groupRepository) Find(ctx context.Context, id string) (*models.Group, error) {
	res := models.Group{}
	err := r.db.GetContext(ctx, &res, "SELECT * FROM \"group\" WHERE group_id=$1", id)
	if err != nil {
		if err == sql.ErrNoRows {
			return nil, slerrors.NotFound("Group")
		}

		return nil, err
	}

	return &res, nil
}

func (r *groupRepository) List(ctx context.Context, filter models.GroupFilter) ([]*models.Group, error) {
	sq := squirrel.Select("*").From("\"group\"").PlaceholderFormat(squirrel.Dollar)
	sq = sq.Where(squirrel.Eq{"user_id": filter.UserID})
	if len(filter.IDs) > 0 {
		sq = sq.Where(squirrel.Eq{"group_id": filter.IDs})
	}

	sq = sq.OrderBy("name")

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

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

	return res, nil
}

func (r *groupRepository) Insert(ctx context.Context, group models.Group) error {
	_, err := r.db.NamedExecContext(ctx, `
		INSERT INTO "group" (
			group_id, user_id, name, icon, description
		) VALUES (
			:group_id, :user_id, :name, :icon, :description		          
		)
	`, &group)
	if err != nil {
		return err
	}

	return nil
}

func (r *groupRepository) Update(ctx context.Context, group models.Group) error {
	_, err := r.db.NamedExecContext(ctx, `
		UPDATE "group" SET
			name=:name,
			icon=:icon,
			description=:description
		WHERE group_id=:group_id
	`, &group)
	if err != nil {
		return err
	}

	return nil
}

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

	return nil
}