package models

import (
	"log"
	"main/configs"
)

type Task struct {
	ID        int    `json:"id"`
	Name      string `json:"name"`
	Type      string `json:"type"`     // 任務類型(訓練|推理)
	Status    string `json:"status"`   // (waiting|running|success|error)
	Progress  int    `json:"progress"` // (0-100)
	CreatedAt string `json:"created_at"`
	UpdatedAt string `json:"updated_at"`
	UserID    int    `json:"user_id"`
}

func (task *Task) Create() error {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return err
	}
	defer db.Close()
	stmt, err := db.Prepare("INSERT INTO tasks(name, type, created_at, updated_at) values(?, ?, ?, ?)")
	if err != nil {
		log.Println(err)
		return err
	}
	defer stmt.Close()
	result, err := stmt.Exec(task.Name, task.Type, task.CreatedAt, task.UpdatedAt)
	if err != nil {
		log.Println(err)
		return err
	}
	id, err := result.LastInsertId()
	if err != nil {
		return err
	}
	task.ID = int(id)
	return nil
}

func (task *Task) Delete() error {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return err
	}
	defer db.Close()
	stmt, err := db.Prepare("DELETE FROM tasks WHERE id = ?")
	if err != nil {
		log.Println(err)
		return err
	}
	defer stmt.Close()
	_, err = stmt.Exec(task.ID)
	if err != nil {
		log.Println(err)
		return err
	}
	return nil
}

func (task *Task) Update() error {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return err
	}
	defer db.Close()
	stmt, err := db.Prepare("UPDATE tasks SET name = ?, type = ?, updated_at = ? WHERE id = ?")
	if err != nil {
		log.Println(err)
		return err
	}
	defer stmt.Close()
	_, err = stmt.Exec(task.Name, task.Type, task.UpdatedAt, task.ID)
	if err != nil {
		log.Println(err)
		return err
	}
	return nil
}

func (task *Task) Get() error {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return err
	}
	defer db.Close()
	err = db.QueryRow("SELECT name, type, created_at, updated_at FROM tasks WHERE id = ?", task.ID).Scan(&task.Name, &task.Type, &task.CreatedAt, &task.UpdatedAt)
	if err != nil {
		log.Println(err)
		return err
	}
	return nil
}

func QueryTasks(page int, pagesize int) (tasks []interface{}) {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return
	}
	defer db.Close()
	rows, err := db.Query("SELECT id, name, type, created_at, updated_at FROM tasks LIMIT ?, ?", (page-1)*pagesize, pagesize)
	if err != nil {
		log.Println(err)
		return
	}
	defer rows.Close()
	for rows.Next() {
		task := Task{}
		err := rows.Scan(&task.ID, &task.Name, &task.Type, &task.CreatedAt, &task.UpdatedAt)
		if err != nil {
			log.Println(err)
			return
		}
		tasks = append(tasks, task)
	}
	return
}

func CountTasks() (count int) {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return
	}
	defer db.Close()
	err = db.QueryRow("SELECT COUNT(*) FROM tasks").Scan(&count)
	if err != nil {
		log.Println(err)
		return
	}
	return
}