/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

// Tests that vertical panning in the flame graph widget works properly.

const TEST_DATA = [
  {
    color: "#f00",
    blocks: [
      { x: 0, y: 0, width: 50, height: 20, text: "FOO" },
      { x: 50, y: 0, width: 100, height: 20, text: "BAR" }
    ]
  },
  {
    color: "#00f",
    blocks: [
      { x: 0, y: 30, width: 30, height: 20, text: "BAZ" }
    ]
  }
];
const TEST_BOUNDS = { startTime: 0, endTime: 150 };
const TEST_WIDTH = 200;
const TEST_HEIGHT = 100;
const TEST_DPI_DENSITIY = 2;

const {FlameGraph} = require("devtools/client/shared/widgets/FlameGraph");

add_task(async function() {
  await addTab("about:blank");
  await performTest();
  gBrowser.removeCurrentTab();
});

async function performTest() {
  const [host,, doc] = await createHost();
  doc.body.setAttribute("style",
                        "position: fixed; width: 100%; height: 100%; margin: 0;");

  const graph = new FlameGraph(doc.body, TEST_DPI_DENSITIY);
  graph.fixedWidth = TEST_WIDTH;
  graph.fixedHeight = TEST_HEIGHT;

  await graph.ready();

  testGraph(graph);

  await graph.destroy();
  host.destroy();
}

function testGraph(graph) {
  graph.setData({ data: TEST_DATA, bounds: TEST_BOUNDS });

  // Drag up vertically only.

  dragStart(graph, TEST_WIDTH / 2, TEST_HEIGHT / 2);
  is(graph.getViewRange().startTime | 0, 0,
    "The selection start boundary is correct (1).");
  is(graph.getViewRange().endTime | 0, 150,
    "The selection end boundary is correct (1).");
  is(graph.getViewRange().verticalOffset | 0, 0,
    "The vertical offset is correct (1).");

  hover(graph, TEST_WIDTH / 2, TEST_HEIGHT / 2 - 50);
  is(graph.getViewRange().startTime | 0, 0,
    "The selection start boundary is correct (2).");
  is(graph.getViewRange().endTime | 0, 150,
    "The selection end boundary is correct (2).");
  is(graph.getViewRange().verticalOffset | 0, 17,
    "The vertical offset is correct (2).");

  dragStop(graph, TEST_WIDTH / 2, TEST_HEIGHT / 2 - 100);
  is(graph.getViewRange().startTime | 0, 0,
    "The selection start boundary is correct (3).");
  is(graph.getViewRange().endTime | 0, 150,
    "The selection end boundary is correct (3).");
  is(graph.getViewRange().verticalOffset | 0, 42,
    "The vertical offset is correct (3).");

  // Drag down strongly vertically and slightly horizontally.

  dragStart(graph, TEST_WIDTH / 2, TEST_HEIGHT / 2);
  is(graph.getViewRange().startTime | 0, 0,
    "The selection start boundary is correct (4).");
  is(graph.getViewRange().endTime | 0, 150,
    "The selection end boundary is correct (4).");
  is(graph.getViewRange().verticalOffset | 0, 42,
    "The vertical offset is correct (4).");

  hover(graph, TEST_WIDTH / 2, TEST_HEIGHT / 2 + 50);
  is(graph.getViewRange().startTime | 0, 0,
    "The selection start boundary is correct (5).");
  is(graph.getViewRange().endTime | 0, 150,
    "The selection end boundary is correct (5).");
  is(graph.getViewRange().verticalOffset | 0, 25,
    "The vertical offset is correct (5).");

  dragStop(graph, TEST_WIDTH / 2 + 100, TEST_HEIGHT / 2 + 500);
  is(graph.getViewRange().startTime | 0, 0,
    "The selection start boundary is correct (6).");
  is(graph.getViewRange().endTime | 0, 150,
    "The selection end boundary is correct (6).");
  is(graph.getViewRange().verticalOffset | 0, 0,
    "The vertical offset is correct (6).");

  // Drag up slightly vertically and strongly horizontally.

  dragStart(graph, TEST_WIDTH / 2, TEST_HEIGHT / 2);
  is(graph.getViewRange().startTime | 0, 0,
    "The selection start boundary is correct (7).");
  is(graph.getViewRange().endTime | 0, 150,
    "The selection end boundary is correct (7).");
  is(graph.getViewRange().verticalOffset | 0, 0,
    "The vertical offset is correct (7).");

  hover(graph, TEST_WIDTH / 2 + 50, TEST_HEIGHT / 2);
  is(graph.getViewRange().startTime | 0, 0,
    "The selection start boundary is correct (8).");
  is(graph.getViewRange().endTime | 0, 116,
    "The selection end boundary is correct (8).");
  is(graph.getViewRange().verticalOffset | 0, 0,
    "The vertical offset is correct (8).");

  dragStop(graph, TEST_WIDTH / 2 + 500, TEST_HEIGHT / 2 + 100);
  is(graph.getViewRange().startTime | 0, 0,
    "The selection start boundary is correct (9).");
  is(graph.getViewRange().endTime | 0, 0,
    "The selection end boundary is correct (9).");
  is(graph.getViewRange().verticalOffset | 0, 0,
    "The vertical offset is correct (9).");
}

// EventUtils just doesn't work!

function hover(graph, x, y = 1) {
  x /= window.devicePixelRatio;
  y /= window.devicePixelRatio;
  graph._onMouseMove({ testX: x, testY: y });
}

function dragStart(graph, x, y = 1) {
  x /= window.devicePixelRatio;
  y /= window.devicePixelRatio;
  graph._onMouseMove({ testX: x, testY: y });
  graph._onMouseDown({ testX: x, testY: y });
}

function dragStop(graph, x, y = 1) {
  x /= window.devicePixelRatio;
  y /= window.devicePixelRatio;
  graph._onMouseMove({ testX: x, testY: y });
  graph._onMouseUp({ testX: x, testY: y });
}
