package ui

import (
	"time"

	"bitbucket.org/hevanto/ui/screen"
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/data/binding"
	"fyne.io/fyne/v2/widget"
	"github.com/google/uuid"
	"github.com/nicksnyder/go-i18n/v2/i18n"
)

// BaseView represents the base implementation of a view
// You can create new view types by composing a type around BaseView
type BaseView struct {
	// The concrete view (Wrapper Object)
	concreteView View

	// Id of view
	id string

	// The controller
	Ctrl Controller

	// Root CanvasObject of the view
	CanvasObject fyne.CanvasObject

	// The screen definition
	screenDefinition *screen.Screen

	// ----------- ScreenHandler -------------//

	// Localizer to translate screen labels
	localizer *i18n.Localizer

	// Map of screen elements that got an id assigned
	screenElementMap map[string]fyne.CanvasObject

	// Map of list item template
	listItemTemplates map[string]func() fyne.CanvasObject

	// Map of list data item renderers
	listDataItemRenderers map[string]func(binding.DataItem, fyne.CanvasObject)

	// Map of list item renderers
	listItemRenderers map[string]func(int, fyne.CanvasObject)

	// Map of list length functions
	listLenghts map[string]func() int

	// Handlers
	onSelectedHandlers     map[string]func(widget.ListItemID)
	onUnselectedHandlers   map[string]func(widget.ListItemID)
	onClickedHandlers      map[string]func()
	onCheckChangedHandlers map[string]func(bool)
	onDateSelectedHandlers map[string]func(time.Time)
}

// NewBaseView creates a new baseview
// Any wrapper view should call this function in it's own initialization
// function an pass itself.
//
// example:
//
//	func NewWrapperView(...) *WrapperView {
//		v := new(WrapperView)
//		v.BaseView = NewBaseView(v)
//		..
//		return v
//	}
func NewBaseView(
	concreteView View,
	controller Controller,
) *BaseView {
	v := new(BaseView)
	v.id = uuid.NewString()
	v.concreteView = concreteView
	v.Ctrl = controller
	return v
}

// ID returns tie id of the view
func (v BaseView) ID() string {
	return v.id
}

// SetID allows the user to specify the ID of the view
func (v *BaseView) SetID(id string) {
	v.id = id
}

// Equals checks equality of two views by comparing their id
func (v BaseView) Equals(other View) bool {
	return v.id == other.ID()
}

// Title returns the title of the view
func (v BaseView) Title() string {
	return ""
}

// Initialize initializes the view
func (v *BaseView) Initialize() fyne.CanvasObject {
	LogWindowEvent(v, Initialize)
	if err := v.Ctrl.Initialize(); err != nil {
		LogWindowError(v, Initialize, err)
	}
	if v.screenDefinition != nil {
		obj, err := v.screenDefinition.Initialize()
		if err != nil {
			LogWindowError(v, Initialize, err)
			return nil
		}
		v.CanvasObject = obj
	}
	return v.CanvasObject
}

// Refresh is called when the view needs a full update
func (v *BaseView) Refresh() {
	LogWindowEvent(v, Refresh)
	if v.CanvasObject != nil {
		v.CanvasObject.Refresh()
	}
}

// OnShow is called when the view becomes visible on the screen
func (v *BaseView) OnShow() {
	LogWindowEvent(v, OnShow)
}

func (v *BaseView) OnHide() {
	LogWindowEvent(v, OnHide)
}