package pinwindows

import (
	rl "github.com/gen2brain/raylib-go/raylib"
)

type managewindowfunc func(*RayGuiWindowManager, *RayGuiWindow)

type RayGuiWindowManager struct {
	winlist          []*RayGuiWindow
	movingwindow     *RayGuiWindow // the currently moving (resize, drag, etc...)
	movingwindowmode int
}

func NewRayGuiWindowManager() RayGuiWindowManager {
	var windowlist []*RayGuiWindow
	return RayGuiWindowManager{winlist: windowlist, movingwindow: nil}
}

func (winman *RayGuiWindowManager) ManageWindowlist() {
	var windowtomovetofront *RayGuiWindow = nil
	for i := 0; i < len(winman.winlist); i++ {
		if winman.winlist[i].isLeftClicked() {
			windowtomovetofront = winman.winlist[i]
		}
	}
	if windowtomovetofront != nil {
		windowtomovetofront.ManageFunc = MoveToTopOfWindowlist
	}
	for i := 0; i < len(winman.winlist); i++ {
		if winman.winlist[i].ManageFunc != nil {
			winman.winlist[i].ManageFunc(winman, winman.winlist[i])
		}
	}
}

func (winman *RayGuiWindowManager) ProcessUserWindowMovement() {
	currentmovingwindow := winman.movingwindow

	for i := 0; i < len(winman.winlist); i++ {
		if winman.winlist[i].DidStartMoveDrag() && currentmovingwindow == nil {
			winman.movingwindow = winman.winlist[i]
			winman.movingwindowmode = WINDOW_MODE_DRAG
		}
		if winman.winlist[i].DidStartResizeDrag() && currentmovingwindow == nil {
			winman.movingwindow = winman.winlist[i]
			winman.movingwindowmode = WINDOW_MODE_RESZIE
		}
		if rl.IsMouseButtonReleased(rl.MouseButtonLeft) || rl.IsMouseButtonReleased(rl.MouseButtonRight) {
			winman.movingwindow = nil
		}

	}
	if winman.movingwindow != nil {
		if winman.movingwindowmode == WINDOW_MODE_DRAG {
			winman.movingwindow.Pos.X += (rl.GetMouseDelta().X)
			winman.movingwindow.Pos.Y += (rl.GetMouseDelta().Y)
		}
		if winman.movingwindowmode == WINDOW_MODE_RESZIE {
			winman.movingwindow.Resize(int(rl.GetMouseDelta().X), int(rl.GetMouseDelta().Y))
		}
	}
}

func (winman RayGuiWindowManager) DrawInternalWindowList() {
	for i := 0; i < len(winman.winlist); i++ {
		winman.winlist[i].DrawInternals()
	}
}

func (winman RayGuiWindowManager) DrawWindowlist() {
	for i := 0; i < len(winman.winlist); i++ {
		winman.winlist[i].Draw()
	}
}

func (winman *RayGuiWindowManager) WinlistUnlistWindow(windowtoremove *RayGuiWindow) {
	indextoremove := -1
	for i := 0; i < len(winman.winlist); i++ {
		if winman.winlist[i] == windowtoremove {
			indextoremove = i
			break
		}
	}
	if indextoremove == -1 {
		return
	}
	copy(winman.winlist[indextoremove:], winman.winlist[indextoremove+1:])
	winman.winlist[len(winman.winlist)-1] = nil
	winman.winlist = winman.winlist[:len(winman.winlist)-1]
	return
}

func CloseWindow(winman *RayGuiWindowManager, windowtoremove *RayGuiWindow) {
	winman.WinlistUnlistWindow(windowtoremove)
	rl.UnloadRenderTexture(*windowtoremove.Texture)
	if winman.movingwindow == windowtoremove {
		winman.movingwindow = nil
	}
	return
}

func (winman *RayGuiWindowManager) AddWindow(windowtoadd *RayGuiWindow) {
	if len(winman.winlist) > 0 {
		winman.winlist[len(winman.winlist)-1].AcceptingInput = false
	}
	winman.winlist = append(winman.winlist, windowtoadd)
	winman.winlist[len(winman.winlist)-1].AcceptingInput = true
}

func MoveToTopOfWindowlist(winman *RayGuiWindowManager, windowtomove *RayGuiWindow) {
	winman.winlist[len(winman.winlist)-1].AcceptingInput = false
	winman.WinlistUnlistWindow(windowtomove)
	winman.AddWindow(windowtomove)
	windowtomove.ManageFunc = nil
}