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

/**
 * Tests if editing a vertex and a fragment shader would permanently store
 * their new source on the backend and reshow it in the frontend when required.
 */

function* ifWebGLSupported() {
  let { target, panel } = yield initShaderEditor(MULTIPLE_CONTEXTS_URL);
  let { gFront, EVENTS, ShadersListView, ShadersEditorsView } = panel.panelWin;

  reload(target);

  yield promise.all([
    once(gFront, "program-linked"),
    once(gFront, "program-linked")
  ]);

  yield once(panel.panelWin, EVENTS.SOURCES_SHOWN);

  let vsEditor = yield ShadersEditorsView._getEditor("vs");
  let fsEditor = yield ShadersEditorsView._getEditor("fs");

  is(ShadersListView.selectedIndex, 0,
    "The first program is currently selected.");
  is(vsEditor.getText().indexOf("1);"), 136,
    "The vertex shader editor contains the correct initial text (1).");
  is(fsEditor.getText().indexOf("1);"), 117,
    "The fragment shader editor contains the correct initial text (1).");
  is(vsEditor.getText().indexOf("2.);"), -1,
    "The vertex shader editor contains the correct initial text (2).");
  is(fsEditor.getText().indexOf(".0);"), -1,
    "The fragment shader editor contains the correct initial text (2).");

  vsEditor.replaceText("2.", { line: 5, ch: 44 }, { line: 5, ch: 45 });
  yield once(panel.panelWin, EVENTS.SHADER_COMPILED);

  fsEditor.replaceText(".0", { line: 5, ch: 35 }, { line: 5, ch: 37 });
  yield once(panel.panelWin, EVENTS.SHADER_COMPILED);

  ok(true, "Vertex and fragment shaders were changed.");

  yield ensurePixelIs(gFront, { x: 0, y: 0 }, { r: 0, g: 0, b: 0, a: 255 }, true, "#canvas1");
  yield ensurePixelIs(gFront, { x: 32, y: 32 }, { r: 255, g: 255, b: 0, a: 0 }, true, "#canvas1");
  yield ensurePixelIs(gFront, { x: 64, y: 64 }, { r: 255, g: 255, b: 0, a: 0 }, true, "#canvas1");
  yield ensurePixelIs(gFront, { x: 127, y: 127 }, { r: 0, g: 0, b: 0, a: 255 }, true, "#canvas1");
  yield ensurePixelIs(gFront, { x: 0, y: 0 }, { r: 0, g: 255, b: 255, a: 255 }, true, "#canvas2");
  yield ensurePixelIs(gFront, { x: 32, y: 32 }, { r: 0, g: 255, b: 255, a: 255 }, true, "#canvas2");
  yield ensurePixelIs(gFront, { x: 64, y: 64 }, { r: 0, g: 255, b: 255, a: 255 }, true, "#canvas2");
  yield ensurePixelIs(gFront, { x: 127, y: 127 }, { r: 0, g: 255, b: 255, a: 255 }, true, "#canvas2");

  ok(true, "The vertex and fragment shaders were recompiled successfully.");

  EventUtils.sendMouseEvent({ type: "mousedown" }, ShadersListView.items[1].target);
  yield once(panel.panelWin, EVENTS.SOURCES_SHOWN);

  is(ShadersListView.selectedIndex, 1,
    "The second program is currently selected.");
  is(vsEditor.getText().indexOf("1);"), 136,
    "The vertex shader editor contains the correct text (1).");
  is(fsEditor.getText().indexOf("1);"), 117,
    "The fragment shader editor contains the correct text (1).");
  is(vsEditor.getText().indexOf("2.);"), -1,
    "The vertex shader editor contains the correct text (2).");
  is(fsEditor.getText().indexOf(".0);"), -1,
    "The fragment shader editor contains the correct text (2).");

  EventUtils.sendMouseEvent({ type: "mousedown" }, ShadersListView.items[0].target);
  yield once(panel.panelWin, EVENTS.SOURCES_SHOWN);

  is(ShadersListView.selectedIndex, 0,
    "The first program is currently selected again.");
  is(vsEditor.getText().indexOf("1);"), -1,
    "The vertex shader editor contains the correct text (3).");
  is(fsEditor.getText().indexOf("1);"), -1,
    "The fragment shader editor contains the correct text (3).");
  is(vsEditor.getText().indexOf("2.);"), 136,
    "The vertex shader editor contains the correct text (4).");
  is(fsEditor.getText().indexOf(".0);"), 116,
    "The fragment shader editor contains the correct text (4).");

  yield teardown(panel);
  finish();
}