package game

import (
	"image/color"
	"log"
	"runtime"

	"edgaru089.ink/go/gl01/internal/asset"
	"edgaru089.ink/go/gl01/internal/igwrap"
	"edgaru089.ink/go/gl01/internal/igwrap/backend"
	"edgaru089.ink/go/gl01/internal/io"
	"edgaru089.ink/go/gl01/internal/util"
	"github.com/go-gl/glfw/v3.3/glfw"
	"github.com/inkyblackness/imgui-go/v4"
)

type guiState struct {
	showLog, showDebugInfo bool
	logFollow              bool

	lastframeCgoCalls int64

	lastCountSec *util.Clock

	loadChunkFile string
	loadChunkID   [2]int32

	saveChunkFile string
	saveChunkID   [2]int32
}

func (g *Game) initImgui(win *glfw.Window) {
	imgui.CreateContext(nil)
	g.io = imgui.CurrentIO()

	cfg := imgui.NewFontConfig()
	cfg.SetOversampleH(1)
	cfg.SetOversampleV(1)
	cfg.SetPixelSnapH(true)
	g.io.Fonts().AddFontFromMemoryTTFV(asset.Unifont, 16, cfg, g.io.Fonts().GlyphRangesChineseFull())
	backend.Init(win)

	g.gui = guiState{
		showLog:       true,
		showDebugInfo: false,
		logFollow:     true,
		loadChunkFile: "chunk.gob",
		loadChunkID:   [2]int32{0, 0},
		saveChunkFile: "chunk.gob",
		saveChunkID:   [2]int32{0, 0},
	}
}

func (g *Game) imgui() {

	io.Diagnostics.CgoCalls = runtime.NumCgoCall() - g.gui.lastframeCgoCalls
	g.gui.lastframeCgoCalls = runtime.NumCgoCall()

	/*if g.gui.lastCountSec.Elapsed() >= time.Second {
		g.gui.lastCountSec.Restart()
	}*/

	if io.ShowDebugInfo {
		imgui.SetNextWindowPosV(imgui.Vec2{}, imgui.ConditionAlways, imgui.Vec2{})
		imgui.SetNextWindowSize(imgui.Vec2{X: float32(io.DisplaySize[0]), Y: float32(io.DisplaySize[1])})
		if igwrap.Begin("F3", nil, igwrap.WindowFlagsOverlay) {
			igwrap.TextBackground("Gl01 compiled by %s/%s [%s/%s] (120AVG) %.1f FPS (%.3f frame)", runtime.Compiler, runtime.Version(), runtime.GOOS, runtime.GOARCH, imgui.CurrentIO().Framerate(), 1000/imgui.CurrentIO().Framerate())
			igwrap.TextBackground("GLFW %s, Dear ImGUI %s", glfw.GetVersionString(), imgui.Version())
			igwrap.TextBackground("CgoCalls:%d (%d lastframe), Goroutines:%d", g.gui.lastframeCgoCalls, io.Diagnostics.CgoCalls, runtime.NumGoroutine())
			igwrap.TextBlank()

			imgui.End()
		}
	}

	if g.paused {
		imgui.ShowDemoWindow(nil)

		if igwrap.Begin("Logs", &g.gui.showLog, imgui.WindowFlagsMenuBar) {
			if imgui.BeginMenuBar() {
				if imgui.Button("Clear") {
					logs = ""
				}
				if imgui.Button("Add Logs") {
					for i := 0; i < 8; i++ {
						log.Print("Added logs")
					}
				}
				imgui.Checkbox("Autoscroll", &g.gui.logFollow)
				imgui.EndMenuBar()
			}

			imgui.BeginChildV("LogScroll", imgui.Vec2{}, true, 0)
			imgui.Text(logs)
			if g.gui.logFollow && imgui.ScrollY() >= imgui.ScrollMaxY() {
				imgui.SetScrollHereY(1.0)
			}
			imgui.EndChild()
			imgui.End()
		}

	}

	imgui.BackgroundDrawList().AddRectFilledV(imgui.Vec2{X: float32(io.DisplaySize[0]/2 - 12), Y: float32(io.DisplaySize[1]/2 - 1)}, imgui.Vec2{X: float32(io.DisplaySize[0]/2 + 12), Y: float32(io.DisplaySize[1]/2 + 1)}, imgui.Packed(color.White), 0, 0)
	imgui.BackgroundDrawList().AddRectFilledV(imgui.Vec2{X: float32(io.DisplaySize[0]/2 - 1), Y: float32(io.DisplaySize[1]/2 - 12)}, imgui.Vec2{X: float32(io.DisplaySize[0]/2 + 1), Y: float32(io.DisplaySize[1]/2 + 12)}, imgui.Packed(color.White), 0, 0)

}