import AppEvents from "discourse/lib/app-events";
import Topic from "discourse/models/topic";

moduleFor("controller:topic", "controller:topic", {
  needs: ["controller:composer", "controller:application"],
  beforeEach() {
    this.registry.register("app-events:main", AppEvents.create(), { instantiate: false });
    this.registry.injection("controller", "appEvents", "app-events:main");
  }
});

QUnit.test("editTopic", function(assert) {
  const model = Topic.create();
  const controller = this.subject({ model });

  assert.not(controller.get("editingTopic"), "we are not editing by default");

  controller.set("model.details.can_edit", false);
  controller.send("editTopic");

  assert.not(controller.get("editingTopic"), "calling editTopic doesn't enable editing unless the user can edit");

  controller.set("model.details.can_edit", true);
  controller.send("editTopic");

  assert.ok(controller.get("editingTopic"), "calling editTopic enables editing if the user can edit");
  assert.equal(controller.get("buffered.title"), model.get("title"));
  assert.equal(controller.get("buffered.category_id"), model.get("category_id"));

  controller.send("cancelEditingTopic");

  assert.not(controller.get("editingTopic"), "cancelling edit mode reverts the property value");
});

QUnit.test("toggleMultiSelect", function(assert) {
  const model = Topic.create();
  const controller = this.subject({ model });

  assert.not(controller.get("multiSelect"), "multi selection mode is disabled by default");

  controller.get("selectedPostIds").pushObject(1);
  assert.equal(controller.get("selectedPostIds.length"), 1);

  controller.send("toggleMultiSelect");

  assert.ok(controller.get("multiSelect"), "calling 'toggleMultiSelect' once enables multi selection mode");
  assert.equal(controller.get("selectedPostIds.length"), 0, "toggling 'multiSelect' clears 'selectedPostIds'");

  controller.get("selectedPostIds").pushObject(2);
  assert.equal(controller.get("selectedPostIds.length"), 1);

  controller.send("toggleMultiSelect");

  assert.not(controller.get("multiSelect"), "calling 'toggleMultiSelect' twice disables multi selection mode");
  assert.equal(controller.get("selectedPostIds.length"), 0, "toggling 'multiSelect' clears 'selectedPostIds'");
});

QUnit.test("selectedPosts", function(assert) {
  const postStream = { posts: [{ id: 1 }, { id: 2 }, { id: 3 }] };
  const model = Topic.create({ postStream });
  const controller = this.subject({ model });

  controller.set("selectedPostIds", [1, 2, 42]);

  assert.equal(controller.get("selectedPosts.length"), 2, "selectedPosts only contains already loaded posts");
  assert.not(controller.get("selectedPosts").some(p => p === undefined), "selectedPosts only contains valid post objects");
});

QUnit.test("selectedAllPosts", function(assert) {
  const postStream = { stream: [1, 2, 3] };
  const model = Topic.create({ postStream });
  const controller = this.subject({ model });

  controller.set("selectedPostIds", [1, 2]);

  assert.not(controller.get("selectedAllPosts"), "not all posts are selected");

  controller.get("selectedPostIds").pushObject(3);

  assert.ok(controller.get("selectedAllPosts"), "all posts are selected");

  controller.get("selectedPostIds").pushObject(42);

  assert.ok(controller.get("selectedAllPosts"), "all posts (including filtered posts) are selected");
});

QUnit.test("selectedPostsUsername", function(assert) {
  const postStream = {
    posts: [
      { id: 1, username: "gary" },
      { id: 2, username: "gary" },
      { id: 3, username: "lili" },
    ],
    stream: [1, 2, 3]
  };

  const model = Topic.create({ postStream });
  const controller = this.subject({ model });
  const selectedPostIds = controller.get("selectedPostIds");

  assert.equal(controller.get("selectedPostsUsername"), undefined, "no username when no selected posts");

  selectedPostIds.pushObject(1);

  assert.equal(controller.get("selectedPostsUsername"), "gary", "username of the selected posts");

  selectedPostIds.pushObject(2);

  assert.equal(controller.get("selectedPostsUsername"), "gary", "username of all the selected posts when same user");

  selectedPostIds.pushObject(3);

  assert.equal(controller.get("selectedPostsUsername"), undefined, "no username when more than 1 user");

  selectedPostIds.replace(2, 1, [42]);

  assert.equal(controller.get("selectedPostsUsername"), undefined, "no username when not already loaded posts are selected");
});

QUnit.test("showSelectedPostsAtBottom", function(assert) {
  const site = Ember.Object.create({ mobileView: false });
  const model = Topic.create({ posts_count: 3 });
  const controller = this.subject({ model, site });

  assert.not(controller.get("showSelectedPostsAtBottom"), "false on desktop");

  site.set("mobileView", true);

  assert.not(controller.get("showSelectedPostsAtBottom"), "requires at least 3 posts on mobile");

  model.set("posts_count", 4);

  assert.ok(controller.get("showSelectedPostsAtBottom"), "true when mobile and more than 3 posts");
});

QUnit.test("canDeleteSelected", function(assert) {
  const postStream = {
    posts: [
      { id: 1, can_delete: false },
      { id: 2, can_delete: true },
      { id: 3, can_delete: true }
    ],
    stream: [1, 2, 3]
  };

  const model = Topic.create({ postStream });
  const controller = this.subject({ model });
  const selectedPostIds = controller.get("selectedPostIds");

  assert.not(controller.get("canDeleteSelected"), "false when no posts are selected");

  selectedPostIds.pushObject(1);

  assert.not(controller.get("canDeleteSelected"), "false when can't delete one of the selected posts");

  selectedPostIds.replace(0, 1, [2, 3]);

  assert.ok(controller.get("canDeleteSelected"), "true when all selected posts can be deleted");

  selectedPostIds.pushObject(1);

  assert.ok(controller.get("canDeleteSelected"), "true when all posts are selected");
});

QUnit.test("Can split/merge topic", function(assert) {
  const postStream = {
    posts: [{ id: 1 }, { id: 2 }],
    stream: [1, 2]
  };

  const model = Topic.create({ postStream, details: { can_move_posts: false } });
  const controller = this.subject({ model });
  const selectedPostIds = controller.get("selectedPostIds");

  assert.not(controller.get("canSplitTopic"), "can't split topic when no posts are selected");
  assert.not(controller.get("canMergeTopic"), "can't merge topic when no posts are selected");

  selectedPostIds.pushObject(1);

  assert.not(controller.get("canSplitTopic"), "can't split topic when can't move posts");
  assert.not(controller.get("canMergeTopic"), "can't merge topic when can't move posts");

  model.set("details.can_move_posts", true);

  assert.ok(controller.get("canSplitTopic"), "can split topic");
  assert.ok(controller.get("canMergeTopic"), "can merge topic");

  selectedPostIds.pushObject(2);

  assert.not(controller.get("canSplitTopic"), "can't split topic when all posts are selected");
  assert.ok(controller.get("canMergeTopic"), "can merge topic when all posts are selected");
});

QUnit.test("canChangeOwner", function(assert) {
  const currentUser = Discourse.User.create({ admin: false });
  this.registry.register("current-user:main", currentUser, { instantiate: false });
  this.registry.injection("controller", "currentUser", "current-user:main");

  const postStream = {
    posts: [
      { id: 1, username: "gary" },
      { id: 2, username: "lili" },
    ],
    stream: [1, 2]
  };

  const model = Topic.create({ postStream, currentUser: { admin: false }});
  const controller = this.subject({ model });
  const selectedPostIds = controller.get("selectedPostIds");

  assert.not(controller.get("canChangeOwner"), "false when no posts are selected");

  selectedPostIds.pushObject(1);

  assert.not(controller.get("canChangeOwner"), "false when not admin");

  currentUser.set("admin", true);

  assert.ok(controller.get("canChangeOwner"), "true when admin and one post is selected");

  selectedPostIds.pushObject(2);

  assert.not(controller.get("canChangeOwner"), "false when admin but more than 1 user");
});

QUnit.test("canMergePosts", function(assert) {
  const postStream = {
    posts: [
      { id: 1, username: "gary", can_delete: true },
      { id: 2, username: "lili", can_delete: true },
      { id: 3, username: "gary", can_delete: false },
      { id: 4, username: "gary", can_delete: true },
    ],
    stream: [1, 2, 3]
  };

  const model = Topic.create({ postStream });
  const controller = this.subject({ model });
  const selectedPostIds = controller.get("selectedPostIds");

  assert.not(controller.get("canMergePosts"), "false when no posts are selected");

  selectedPostIds.pushObject(1);

  assert.not(controller.get("canMergePosts"), "false when only one post is selected");

  selectedPostIds.pushObject(2);

  assert.not(controller.get("canMergePosts"), "false when selected posts are from different users");

  selectedPostIds.replace(1, 1, [3]);

  assert.not(controller.get("canMergePosts"), "false when selected posts can't be deleted");

  selectedPostIds.replace(1, 1, [4]);

  assert.ok(controller.get("canMergePosts"), "true when all selected posts are deletable and by the same user");
});

QUnit.test("Select/deselect all", function(assert) {
  const postStream = { stream: [1, 2, 3] };
  const model = Topic.create({ postStream });
  const controller = this.subject({ model });

  assert.equal(controller.get("selectedPostsCount"), 0, "no posts selected by default");

  controller.send("selectAll");

  assert.equal(controller.get("selectedPostsCount"), postStream.stream.length, "calling 'selectAll' selects all posts");

  controller.send("deselectAll");

  assert.equal(controller.get("selectedPostsCount"), 0, "calling 'deselectAll' deselects all posts");
});

QUnit.test("togglePostSelection", function(assert) {
  const controller = this.subject();
  const selectedPostIds = controller.get("selectedPostIds");

  assert.equal(selectedPostIds[0], undefined, "no posts selected by default");

  controller.send("togglePostSelection", { id: 1 });

  assert.equal(selectedPostIds[0], 1, "adds the selected post id if not already selected");

  controller.send("togglePostSelection", { id: 1 });

  assert.equal(selectedPostIds[0], undefined, "removes the selected post id if already selected");
});

// QUnit.test("selectReplies", function(assert) {
//   const controller = this.subject();
//   const selectedPostIds = controller.get("selectedPostIds");
//
//   assert.equal(selectedPostIds[0], undefined, "no posts selected by default");
//
//   controller.send("selectReplies", { id: 42 });
//
//   assert.equal(selectedPostIds[0], 42, "selected post #42");
//   assert.equal(selectedPostIds[1], 45, "selected post #45");
//   assert.equal(selectedPostIds[2], 100, "selected post #100");
// });

QUnit.test("selectBelow", function(assert) {
  const postStream = { stream: [1, 2, 3, 4, 5] };
  const model = Topic.create({ postStream });
  const controller = this.subject({ model });
  const selectedPostIds = controller.get("selectedPostIds");

  assert.equal(selectedPostIds[0], undefined, "no posts selected by default");

  controller.send("selectBelow", { id: 3 });

  assert.equal(selectedPostIds[0], 3, "selected post #3");
  assert.equal(selectedPostIds[1], 4, "also selected 1st post below post #3");
  assert.equal(selectedPostIds[2], 5, "also selected 2nd post below post #3");
});