package screens

import (
	"lab.zaar.be/thefish/alchemyst-go/engine/ecs"
	"lab.zaar.be/thefish/alchemyst-go/engine/ecs/systems"
	"lab.zaar.be/thefish/alchemyst-go/engine/gamestate"
	"lab.zaar.be/thefish/alchemyst-go/engine/mob/movement"
	"lab.zaar.be/thefish/alchemyst-go/engine/types"
	"lab.zaar.be/thefish/alchemyst-go/ui/mainwindow"
)

type GameScreen struct {
	mw         *mainwindow.MainWindow
	state      *gamestate.GameState
	vp         *mainwindow.ViewPort
	controller *ecs.Controller
	scm        *types.ScreenManager
}

func NewGameScreen(mw *mainwindow.MainWindow, state *gamestate.GameState, viewPort *mainwindow.ViewPort, controller *ecs.Controller, scm *types.ScreenManager) *GameScreen {
	ts := &GameScreen{mw: mw, state: state, vp: viewPort, controller: controller, scm: scm}
	renderMobs := systems.MobRenderSystem{EntityController: ts.controller}
	ts.controller.AddSystem(renderMobs, 1)
	return ts
}

func (ts *GameScreen) UseEcs() bool { return true }
func (ts *GameScreen) Enter() {
	ts.mw.GetLayer("overlay").ClearArea(0, ts.mw.H-3, 30, 3)
	ts.mw.GetLayer("overlay").WithColor("#77777777").
		Print(1, ts.mw.H-2, "Press [color=white]?[/color] for help")
}
func (ts *GameScreen) Exit() {
	ts.mw.GetLayer("base").ClearArea(1, ts.mw.H-2, 30, 1)
	//remove what we dont need
}

func (ts *GameScreen) HandleInput(input string) {
	//ts.state.Do(func(){
	switch input {
	case "Up", "k", "8":
		ts.walk(ts.state, 0, -1)
		break
	case "Down", "j", "2":
		ts.walk(ts.state, 0, 1)
		break
	case "Left", "h", "4":
		ts.walk(ts.state, -1, 0)
		break
	case "Right", "l", "6":
		ts.walk(ts.state, 1, 0)
		break
	case "y", "7":
		ts.walk(ts.state, -1, -1)
		break
	case "u", "9":
		ts.walk(ts.state, 1, -1)
		break
	case "b", "1":
		ts.walk(ts.state, -1, 1)
		break
	case "n", "3":
		ts.walk(ts.state, 1, 1)
		break
	case "Shift+/":
		ts.scm.SetScreenByName("help")
		break
	default:
		ts.mw.GetLayer("base").ClearArea(0, 3, 40, 1)
		ts.mw.GetLayer("base").Print(1, 3, "Key: "+input)
		ts.mw.GetLayer("base").Print(1, 6, "█")

	}
	//})
}

func (ts *GameScreen) Render() {
	ts.vp.Render(ts.state)
}

func (ts *GameScreen) walk(state *gamestate.GameState, dx, dy int) {
	controller := state.Controller
	coords := controller.GetComponent(state.Player, types.Coords{}.TypeOf()).(types.Coords)
	newCoords := types.Coords{coords.X + dx, coords.Y + dy}
	movable := controller.GetComponent(state.Player, movement.Moveable{}.TypeOf()).(movement.Moveable)

	if !movable.IsBlocked(newCoords) {
		controller.UpdateComponent(state.Player, types.Coords{}.TypeOf(), newCoords)
	}

	state.Redraw <- struct{}{}
	state.FovRecompute <- struct{}{}
}