package mysql

import (
	"errors"

	"gorm.io/gorm"
	"myschools.me/heritage/heritage-api/model"
)

func TaskCreate(t *model.Task) error {
	db, err := newDB()
	if err != nil {
		return err
	}
	return db.Create(t).Error
}

func TaskUpdate(t *model.Task) (bool, error) {
	db, err := newDB()
	if err != nil {
		return false, err
	}
	tx := db.Model(&model.Task{}).Where("id = ? AND deleted = false", t.ID).Updates(t)
	if tx.Error != nil {
		return false, tx.Error
	}
	return tx.RowsAffected > 0, nil
}

func TaskDelete(id *string) (bool, error) {
	db, err := newDB()
	if err != nil {
		return false, err
	}
	tx := db.Model(&model.Task{}).Where("id = ? AND deleted = false", *id).Update("deleted", true)
	if tx.Error != nil {
		return false, tx.Error
	}
	return tx.RowsAffected > 0, nil
}

func TaskByID(id *string) (*model.Task, bool, error) {
	db, err := newDB()
	if err != nil {
		return nil, false, err
	}
	var t model.Task
	if err := db.Where("id = ? AND deleted = false", *id).First(&t).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return nil, false, nil
		}
		return nil, false, err
	}
	return &t, true, nil
}

func TaskList(projectID, keyword *string, offset, limit *int) ([]model.Task, int64, error) {
	db, err := newDB()
	if err != nil {
		return nil, 0, err
	}
	q := db.Model(&model.Task{}).Where("deleted = false")
	if projectID != nil && *projectID != "" {
		q = q.Where("project_id = ?", *projectID)
	}
	if keyword != nil && *keyword != "" {
		kw := "%" + *keyword + "%"
		q = q.Where("name LIKE ?", kw)
	}

	var total int64
	if err := q.Count(&total).Error; err != nil {
		return nil, 0, err
	}

	var items []model.Task
	if err := q.Order("created_at desc").Offset(*offset).Limit(*limit).Find(&items).Error; err != nil {
		return nil, 0, err
	}
	return items, total, nil
}