package main

import (
	"log"

	"github.com/hajimehoshi/ebiten/v2"
	"github.com/hajimehoshi/ebiten/v2/inpututil"

	"muhq.space/muhqs-game/go/ui"
)

type (
	// keyAction is a function applying an action for an input event to the game.
	// It reports if it should be removed after its invocation.
	// An unsuccessful action returns err != nil.
	keyAction func(ui.InputEvent, *Game) (bool, error)
	// keyBindings maps inputs to actions
	keyBindings map[any]keyAction
)

func (g *Game) handleKeyBindings(bindings keyBindings) (err error) {
	for i, ev := range ui.Input {
		for _k, a := range bindings {
			var remove bool
			switch k := _k.(type) {
			case ebiten.MouseButton:
				if ev.Kind == ui.Click && ev.Ctx.(ui.ClickCtx).Btn == k {
					remove, err = a(ev, g)
					ui.ConsumeInput(i)
				}

			case ui.InputType:
				if k != ev.Kind {
					continue
				}

				remove, err = a(ev, g)
				ui.ConsumeInput(i)

			// TODO: model simple key presses using the inout queue
			case ebiten.Key:
				if inpututil.IsKeyJustPressed(k) {
					remove, err = a(ev, g)
				}
			}

			if remove {
				delete(bindings, _k)
			}

			if err != nil {
				return
			}
		}
	}
	return
}

func selection(ev ui.InputEvent, g *Game) (bool, error) {
	x, y := ev.X, ev.Y
	obj := g.findObjectAt(x, y)
	if obj == nil {
		return false, nil
	}

	if g.prompt != nil {
		if err := g.prompt.Add(obj); err != nil {
			log.Println("Not added", obj, "to active prompt:", err)
			if g.prompt.Cancelable() {
				g.handleSelection(obj, x, y)
			}
		} else {
			g.updateHighlight()
		}
	} else {
		g.handleSelection(obj, x, y)
	}

	return false, nil
}

func pass(_ ui.InputEvent, g *Game) (bool, error) {
	g.passButton.Click(0, 0)
	return false, nil
}

func reset(_ ui.InputEvent, g *Game) (bool, error) {
	g.reset()
	return false, nil
}