package main

import (
	"math"
	"testing"
)

func fixtureFrame(w, h int) pointerFrame {
	return pointerFrame{"current", w, h, obj{"left": -2560, "top": 120, "width": 2560, "height": 1540}}
}

func TestScrollPixelsReachUpstreamWithoutDoubleScaling(t *testing.T) {
	for _, size := range [][2]int{{1280, 770}, {2558, 1538}, {2560, 1540}} {
		frame := fixtureFrame(size[0], size[1])
		args := obj{"pid": 1, "window_id": 2, "capture_id": "current", "x": 900.5, "y": 600.25, "direction": "down"}
		if err := frame.validate("scroll", args); err != nil {
			t.Fatal(err)
		}
		got := withoutCaptureBinding(args)
		if got["x"] != 900.5 || got["y"] != 600.25 || got["pid"] != 1 || got["window_id"] != 2 {
			t.Fatal(got)
		}
		if _, ok := got["capture_id"]; ok {
			t.Fatal("upstream scroll rejects capture_id")
		}
		if args["capture_id"] != "current" {
			t.Fatal("input evidence mutated")
		}
	}
}

func TestInvalidScrollCoordinatesAreRejectedBeforeDispatch(t *testing.T) {
	frame := fixtureFrame(1280, 770)
	for _, bad := range []obj{
		{"capture_id": "current", "x": 1700, "y": 1000},
		{"capture_id": "old", "x": 900, "y": 600},
		{"x": 900, "y": 600},
		{"capture_id": "current", "x": -1, "y": 0},
		{"capture_id": "current", "x": 1280, "y": 0},
		{"capture_id": "current", "x": 0, "y": 770},
		{"capture_id": "current", "x": "900", "y": 600},
		{"capture_id": "current", "x": math.NaN(), "y": 600},
		{"capture_id": "current", "x": 900, "y": math.Inf(1)},
	} {
		if frame.validate("scroll", bad) == nil {
			t.Fatalf("accepted %v", bad)
		}
	}
}

func TestMovedOrResizedWindowInvalidatesFrame(t *testing.T) {
	frame := fixtureFrame(1280, 770)
	for _, key := range []string{"left", "top", "width", "height"} {
		changed := copyArgs(frame.window)
		changed[key] = num(changed[key]) + 1
		if sameWindow(frame.window, changed) {
			t.Fatal("accepted changed " + key)
		}
	}
}

func TestClickAndBothDragEndpointsUseLatestFrame(t *testing.T) {
	f := fixtureFrame(1280, 770)
	click := obj{"capture_id": "current", "x": 1279, "y": 769}
	if err := f.validate("click_at", click); err != nil {
		t.Fatal(err)
	}
	if click["x"] != 1279 || click["y"] != 769 {
		t.Fatal("click scaled twice")
	}
	drag := obj{"capture_id": "current", "from_x": 0, "from_y": 0, "to_x": 1279, "to_y": 769}
	if err := f.validate("drag", drag); err != nil {
		t.Fatal(err)
	}
	for _, key := range []string{"from_x", "from_y", "to_x", "to_y"} {
		bad := copyArgs(drag)
		bad[key] = 3000
		if f.validate("drag", bad) == nil {
			t.Fatal("accepted out of bounds " + key)
		}
	}
	drag["capture_id"] = "old"
	if f.validate("drag", drag) == nil {
		t.Fatal("accepted stale drag")
	}
}

func TestAllPixelSchemasRequireCapture(t *testing.T) {
	a := newAdapter(nil)
	for _, name := range []string{"click_at", "scroll", "drag"} {
		found := false
		for _, key := range items(a.schemas[name]["required"]) {
			if key == "capture_id" {
				found = true
			}
		}
		if !found {
			t.Fatal(name + " lacks capture binding")
		}
	}
}