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 logRepository struct {
	db *sqlx.DB
}

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

		return nil, err
	}

	return &res, nil
}

func (r *logRepository) List(ctx context.Context, filter models.LogFilter) ([]*models.Log, error) {
	sq := squirrel.Select("log.*").From("log").PlaceholderFormat(squirrel.Dollar)
	sq = sq.Where(squirrel.Eq{"log.user_id": filter.UserID})
	if len(filter.TaskIDs) > 0 {
		sq = sq.Where(squirrel.Eq{"log.task_id": filter.TaskIDs})
	}
	if len(filter.ItemIDs) > 0 {
		sq = sq.Where(squirrel.Or{
			squirrel.Eq{"log.item_id": filter.ItemIDs},
			squirrel.Eq{"log.secondary_item_id": filter.ItemIDs},
		})
	}
	if filter.MinTime != nil {
		sq = sq.Where(squirrel.GtOrEq{
			"log.logged_time": *filter.MinTime,
		})
	}
	if filter.MaxTime != nil {
		sq = sq.Where(squirrel.LtOrEq{
			"log.logged_time": *filter.MaxTime,
		})
	}
	if len(filter.ProjectIDs) > 0 || len(filter.ProjectGroupIDs) > 0 {
		sq = sq.InnerJoin("task AS t ON t.task_id = log.task_id")
		sq = sq.InnerJoin("project AS p ON p.project_id = t.project_id")

		if len(filter.ProjectGroupIDs) > 0 {
			sq = sq.InnerJoin("project_group AS pg ON pg.project_group_id = p.project_group_id")
			sq = sq.Where(squirrel.Eq{"pg.project_group_id": filter.ProjectGroupIDs})
		}

		if len(filter.ProjectIDs) > 0 {
			sq = sq.Where(squirrel.Eq{"p.project_id": filter.ProjectIDs})
		}
	}

	sq = sq.OrderBy("logged_time")

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

	res := make([]*models.Log, 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 *logRepository) Insert(ctx context.Context, log models.Log) error {
	_, err := r.db.NamedExecContext(ctx, `
		INSERT INTO log (
			log_id, user_id, task_id, item_id, logged_time, description, item_amount, secondary_item_id, secondary_item_amount
		) VALUES (
			:log_id, :user_id, :task_id, :item_id, :logged_time, :description, :item_amount, :secondary_item_id, :secondary_item_amount
		)
	`, &log)
	if err != nil {
		return err
	}

	return nil
}

func (r *logRepository) Update(ctx context.Context, log models.Log) error {
	_, err := r.db.NamedExecContext(ctx, `
		UPDATE log SET
			logged_time=:logged_time,
			description=:description,
			item_amount=:item_amount,
			secondary_item_id=:secondary_item_id,
			secondary_item_amount=:secondary_item_amount
		WHERE log_id=:log_id
	`, &log)
	if err != nil {
		return err
	}

	return nil
}

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

	return nil
}