package orm

import (
	"net/http"

	"github.com/jinzhu/gorm"
	"gogs.carducci-dante.gov.it/karmen/core/renderer"
)

type Activity struct {
	gorm.Model
	//	Name      string
	Class     *Class
	Teacher   *Teacher
	Subject   *Subject
	ClassID   uint `schema:"class_id"`
	TeacherID uint `schema:"teacher_id"`
	SubjectID uint `schema:"subject_id"`
	Hours     int

	prevTeacherID uint
}

type ActivityForUpdate struct {
	Activity        Activity
	AllClasses      []*Class
	AllSubjects     []*Subject
	AllTeachers     []*Teacher
	SelectedTeacher map[uint]string
	SelectedSubject map[uint]string
	SelectedClass   map[uint]string
}

type ActivityForAdd struct {
	AllClasses  []*Class
	AllSubjects []*Subject
	AllTeachers []*Teacher
}

func (a *Activity) GetID() uint { return a.ID }

func GetActivity(args map[string]string) (interface{}, error) {
	var activity Activity
	if err := DB().First(&activity, args["id"]).Error; err != nil {
		return nil, err
	}
	return &activity, nil
}

func GetActivityAll(args map[string]string) (interface{}, error) {
	var activity Activity

	id := args["id"]

	if err := DB().Preload("Teacher").Preload("Subject").Preload("Class").First(&activity, id).Error; err != nil {
		return nil, err
	}
	return &activity, nil
}

func GetActivityForUpdate(args map[string]string) (interface{}, error) {
	var data ActivityForUpdate

	id := args["id"]

	if err := DB().Preload("Teacher").Preload("Subject").Preload("Class").First(&data.Activity, id).Error; err != nil {
		return nil, err
	}

	if err := DB().Find(&data.AllClasses).Error; err != nil {
		return nil, err
	}

	if err := DB().Find(&data.AllSubjects).Error; err != nil {
		return nil, err
	}

	if err := DB().Find(&data.AllTeachers).Error; err != nil {
		return nil, err
	}

	data.SelectedTeacher = make(map[uint]string)
	data.SelectedTeacher[data.Activity.TeacherID] = "selected"

	data.SelectedClass = make(map[uint]string)
	data.SelectedClass[data.Activity.ClassID] = "selected"

	data.SelectedSubject = make(map[uint]string)
	data.SelectedSubject[data.Activity.SubjectID] = "selected"
	return data, nil
}

func GetActivityForAdd(args map[string]string) (interface{}, error) {
	var data ActivityForAdd

	if err := DB().Find(&data.AllClasses).Error; err != nil {
		return nil, err
	}

	if err := DB().Find(&data.AllSubjects).Error; err != nil {
		return nil, err
	}

	if err := DB().Find(&data.AllTeachers).Error; err != nil {
		return nil, err
	}

	return data, nil
}

func GetActivitiesAll(args map[string]string) (interface{}, error) {
	var activities []*Activity
	if err := DB().Preload("Teacher").Preload("Subject").Preload("Class").Order("name").Find(&activities).Error; err != nil {
		return nil, err
	}
	return activities, nil
}

func GetActivities(args map[string]string) (interface{}, error) {
	var activities []*Activity
	if err := DB().Order("surname,name").Find(&activities).Error; err != nil {
		return nil, err
	}
	return activities, nil
}

func SaveActivity(activity interface{}) (interface{}, error) {
	if err := DB().Save(activity).Error; err != nil {
		return nil, err
	}
	return activity, nil
}

func UpdateActivity(args map[string]string, r *http.Request) (IDer, error) {
	activity, err := GetActivity(args)
	if err != nil {
		return nil, err
	}
	err = renderer.Decode(activity, r)
	if err != nil {
		return nil, err
	}
	_, err = SaveActivity(activity)
	if err != nil {
		return nil, err
	}
	activity, err = GetActivity(args)
	if err != nil {
		return nil, err
	}
	return activity.(*Activity), nil
}

func AddActivity(args map[string]string, r *http.Request) (IDer, error) {
	activity := new(Activity)
	err := renderer.Decode(activity, r)
	if err != nil {
		return nil, err
	}
	activity, err = CreateActivity(activity)
	if err != nil {
		return nil, err
	}
	return activity, nil
}

func CreateActivity(activity *Activity) (*Activity, error) {
	if err := DB().Create(activity).Error; err != nil {
		return nil, err
	}
	return activity, nil
}

func DeleteActivity(activity *Activity) error {
	if err := DB().Delete(activity).Error; err != nil {
		return err
	}
	return nil
}

// func (a *Activity) AfterSave(tx *gorm.DB) error {
// 	var act Activity
// 	if err := DB().Preload("Teacher").Preload("Subject").Preload("Class").First(&act, a.ID).Error; err != nil {
// 		return err
// 	}

// 	log.Println(a.ID)
// 	if err := tx.Model(a).Update("name", fmt.Sprintf("%s %s %dh", act.Class.Name, act.Subject.Name, act.Hours)).Error; err != nil {
// 		return err
// 	}
// 	return nil
// }