package mysqldriver

import (
	"context"
	"database/sql"
	"errors"
	"fmt"
	"git.aiterp.net/stufflog/server/internal/slerrors"
	"git.aiterp.net/stufflog/server/models"
	sq "github.com/Masterminds/squirrel"
	"github.com/jmoiron/sqlx"
	"time"
)

type issueTaskRepository struct {
	db *sqlx.DB
}

func (r *issueTaskRepository) Find(ctx context.Context, id string) (*models.IssueTask, error) {
	issueTask := models.IssueTask{}
	err := r.db.GetContext(ctx, &issueTask, "SELECT * FROM issue_task WHERE issue_task_id=?", id)
	if err != nil {
		if err == sql.ErrNoRows {
			return nil, slerrors.NotFound("Issue task")
		}

		return nil, err
	}

	return &issueTask, nil
}

func (r *issueTaskRepository) List(ctx context.Context, filter models.IssueTaskFilter) ([]*models.IssueTask, error) {
	q := sq.Select("*").From("issue_task").OrderBy("created_time")
	if filter.ActivityIDs != nil {
		q = q.Where(sq.Eq{"activity_id": filter.ActivityIDs})
	}
	if filter.IssueTaskIDs != nil {
		q = q.Where(sq.Eq{"issue_id": filter.IssueTaskIDs})
	}
	if filter.IssueIDs != nil {
		q = q.Where(sq.Eq{"issue_id": filter.IssueIDs})
	}
	if filter.MinStage != nil {
		q = q.Where(sq.GtOrEq{"status_stage": *filter.MinStage})
	}
	if filter.MaxStage != nil {
		q = q.Where(sq.LtOrEq{"status_stage": *filter.MaxStage})
	}

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

	results := make([]*models.IssueTask, 0, 16)
	err = r.db.SelectContext(ctx, &results, query, args...)
	if err != nil {
		if err == sql.ErrNoRows {
			return []*models.IssueTask{}, nil
		}

		return nil, err
	}

	return results, nil
}

func (r *issueTaskRepository) Insert(ctx context.Context, task models.IssueTask) (*models.IssueTask, error) {
	if task.IssueID == "" {
		return nil, errors.New("missing issue id")
	}

	if task.CreatedTime.IsZero() {
		task.CreatedTime = time.Now().Truncate(time.Second)
		task.UpdatedTime = task.CreatedTime
	}

	tx, err := r.db.BeginTxx(ctx, nil)
	if err != nil {
		return nil, err
	}

	nextID, err := incCounter(ctx, tx, counterKindIssueSubID, task.IssueID)
	if err != nil {
		_ = tx.Rollback()
		return nil, err
	}
	task.ID = fmt.Sprintf("%s-%d", task.IssueID, nextID)

	_, err = tx.NamedExecContext(ctx, `
		INSERT INTO issue_task (
			issue_task_id, issue_id, activity_id, created_time,
			updated_time, due_time, status_stage, status_name,
			name, description, estimated_time, estimated_units,
			points_multiplier
		) VALUES (
			:issue_task_id, :issue_id, :activity_id, :created_time,
			:updated_time, :due_time, :status_stage, :status_name,
			:name, :description, :estimated_time, :estimated_units,
			:points_multiplier
		)
	`, task)
	if err != nil {
		_ = tx.Rollback()
		return nil, err
	}

	err = tx.Commit()
	if err != nil {
		_ = tx.Rollback()
		return nil, err
	}

	return &task, nil
}

func (r *issueTaskRepository) Save(ctx context.Context, task models.IssueTask) error {
	_, err := r.db.NamedExecContext(ctx, `
		UPDATE issue_task SET
			due_time=:due_time,
			status_stage=:status_stage,
			status_name=:status_name,
			name=:name,
			description=:description,
			estimated_time=:estimated_time,
			estimated_units=:estimated_units,
			points_multiplier=:points_multiplier
		WHERE issue_task_id=:issue_task_id
	`, task)

	return err
}

func (r *issueTaskRepository) Delete(ctx context.Context, task models.IssueTask) error {
	_, err := r.db.ExecContext(ctx, "DELETE FROM issue_task WHERE issue_task_id=? LIMIT 1;", task.ID)
	return err
}