import { Edge, LayoutDirection, Tile, Window, Workspace } from "kwin-api";
declare const workspace: Workspace;
declare const registerShortcut: any;
declare const print: any;
enum Axis {
  Horiz = 1,
  Vert = 2,
}
let lastFocused = new Map<Tile, number>();
function dir(axis: Axis): LayoutDirection {
  switch (axis) {
    case Axis.Horiz:
      return LayoutDirection.Horizontal;
    case Axis.Vert:
      return LayoutDirection.Vertical;
  }
}
function mod(a: number, b: number): number {
	while (a < 0) {
		a += b;
	}
	a %= b;
	return a;
}
function get_tile_index(tile: Tile): number {
	let p = tile.parent!;
	return p.tiles.findIndex((t: Tile) => t == tile);
}
/// Gets the closest ancestor of `tile` which is inside an `axis` layout.
function get_least_in_axis(axis: Axis, tile: Tile): Tile | null {
	while (true) {
		if (tile.parent == null) return null;
		if (tile.parent?.layoutDirection == dir(axis)) return tile;
		tile = tile.parent;
	}
}
function move(dir: Edge) {
	const axis = dir == Edge.LeftEdge || dir == Edge.RightEdge ? Axis.Horiz : Axis.Vert;
	const sign = dir == Edge.RightEdge || dir == Edge.BottomEdge ? 1 : -1;
	let t = workspace.activeWindow?.tile;
	if (t == null) return;
	t = get_least_in_axis(axis, t);
	if (t == null) return;
	// t.parent is not null because otherwise get_least_in_axis would have returned null
	const i = mod(get_tile_index(t) + sign, t.parent!.tiles.length);
	t = t.parent!.tiles[i]!;
	while (t.tiles.length != 0) {
		t = t.tiles[lastFocused.get(t) ?? 0];
	}
	workspace.activeWindow = t.windows[0];
}
/*function resize(dir) {
	let axis = dir == Edge.LeftEdge || dir == Edge.RightEdge ? Axis.Horiz : Axis.Vert;
	let sign = dir == Edge.RightEdge || dir == Edge.BottomEdge ? 1 : -1;
	if (workspace.activeWindow?.tile == null) return;
	let child = get_least_in_axis(axis, workspace.activeWindow!.tile);
	if (child == null) return;
	let tile = child.parent;
	if (tile.parent == undefined) {
		return;
	}
	let n = get_tile_index(child);
	let l = tile.tiles.length;
	print(n, "of", l);
	if (n == 0) {
		tile.resizeByPixels(resizeSense * sign, axis == Axis.Horiz ? Edge.RightEdge | Edge.LeftEdge : Edge.BottomEdge | Edge.TopEdge);
	} else if (n == l-1) {
		tile.resizeByPixels(resizeSense * sign, axis == Axis.Horiz ? Edge.LeftEdge : Edge.TopEdge);
	} else {
		tile.resizeByPixels(resizeSense * sign * 0.5, axis == Axis.Horiz ? Edge.RightEdge : Edge.BottomEdge);
		tile.resizeByPixels(resizeSense * sign * 0.5, axis == Axis.Horiz ? Edge.LeftEdge : Edge.TopEdge);
	}
}*/
workspace.windowActivated.connect((w: Window) => {
	if (w.tile == null) return;
	const t = w.tile;
	const p = t.parent;
	if (p == null) return;
	lastFocused.set(p, get_tile_index(t));
});
registerShortcut(
  "kwi3:moveleft", "kwi3: Move one container to the left", "Meta+N",
  () => move(Edge.LeftEdge));
registerShortcut(
  "kwi3:movedown", "kwi3: Move one container down", "Meta+E",
  () => move(Edge.BottomEdge));
registerShortcut(
  "kwi3:moveup", "kwi3: Move one container up", "Meta+I",
  () => move(Edge.TopEdge));
registerShortcut(
  "kwi3:moveright", "kwi3: Move one container to the right", "Meta+O",
  () => move(Edge.RightEdge));
// registerShortcut(
//   "kwi3:shrinkhorizontal", "kwi3: Shrink the current window horizontally", "Meta+Ctrl+N",
//   () => resize(Direction.Left));
// registerShortcut(
//   "kwi3:growvertical", "kwi3: Grow the current window vertically", "Meta+Ctrl+E",
//   () => resize(Direction.Down));
// registerShortcut(
//   "kwi3:shrinkvertical", "kwi3: Shrink the current window vertically", "Meta+Ctrl+I",
//   () => resize(Direction.Up));
// registerShortcut(
//   "kwi3:growhorizontal", "kwi3: Grow the current window horizontally", "Meta+Ctrl+O",
//   () => resize(Direction.Right));

{
  "name": "kwi3",
  "version": "1.0.0",
  "description": "i3-style window management for KWin",
  "main": "src/index.ts",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "Rose Hudson <rose@krx.sh>",
  "license": "MPL-2.0",
  "dependencies": {
    "esbuild": "^0.20.1",
    "kwin-api": "file:../kwin-api"
  }
}

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        "@esbuild/win32-arm64": "0.20.1",
        "@esbuild/win32-ia32": "0.20.1",
        "@esbuild/win32-x64": "0.20.1"
      }
    },
    "node_modules/kwin-api": {
      "resolved": "../kwin-api",
      "link": true
    }
  }
}

{
  "KPlugin": {
    "Name": "kwi3",
    "Description": "i3-style tiling for KWin",
    "Icon": "preferences-system-windows",
    "Authors": [
      {
        "Email": "rose@krx.sh",
        "Name": "Rose Hudson"
      }
    ],
    "Id": "kwi3",
    "Version": "0.0.1",
    "License": "MPL-2.0",
    "Website": "https://en.wikipedia.org"
  },
  "X-Plasma-API": "javascript",
  "X-Plasma-MainScript": "code/main.js",
  "KPackageStructure": "KWin/Script"
}

all:
	npx esbuild --bundle src/index.ts --outfile=package/contents/code/main.js --format=esm --platform=neutral
	kpackagetool6 --type=KWin/Script -u ./package/

node_modules
package/contents/code/main.js