import {
  AsyncTestCompleter,
  beforeEach,
  ddescribe,
  xdescribe,
  describe,
  expect,
  iit,
  inject,
  beforeEachProviders,
  it,
  xit
} from '@angular/core/testing/testing_internal';

import {RouteSegment, UrlSegment, UrlTree, TreeNode, RouteTree} from '../src/segments';
import {link} from '../src/link';
import {DefaultRouterUrlSerializer} from '../src/router_url_serializer';

export function main() {
  describe('link', () => {
    let parser = new DefaultRouterUrlSerializer();

    it("should return the original tree when given an empty array", () => {
      let p = parser.parse("/");
      let tree = s(p.root);
      let t = link(tree.root, tree, p, []);
      expect(t).toBe(p);
    });

    it("should navigate to the root", () => {
      let p = parser.parse("/");
      let tree = s(p.root);
      let t = link(tree.root, tree, p, ["/"]);
      expect(parser.serialize(t)).toEqual("");
    });

    it("should support nested segments", () => {
      let p = parser.parse("/a/b");
      let tree = s(p.firstChild(p.root));
      let t = link(tree.root, tree, p, ["/one", 11, "two", 22]);
      expect(parser.serialize(t)).toEqual("/one/11/two/22");
    });

    it("should preserve siblings", () => {
      let p = parser.parse("/a/11/b(c)");
      let tree = s(p.root);
      let t = link(tree.root, tree, p, ["/a", 11, 'd']);
      expect(parser.serialize(t)).toEqual("/a/11/d(aux:c)");
    });

    it('should update matrix parameters', () => {
      let p = parser.parse("/a;aa=11");
      let tree = s(p.root);
      let t = link(tree.root, tree, p, ["/a", {aa: 22, bb: 33}]);
      expect(parser.serialize(t)).toEqual("/a;aa=22;bb=33");
    });

    it('should create matrix parameters', () => {
      let p = parser.parse("/a");
      let tree = s(p.root);
      let t = link(tree.root, tree, p, ["/a", {aa: 22, bb: 33}]);
      expect(parser.serialize(t)).toEqual("/a;aa=22;bb=33");
    });

    it('should create matrix parameters together with other segments', () => {
      let p = parser.parse("/a");
      let tree = s(p.root);
      let t = link(tree.root, tree, p, ["/a", "/b", {aa: 22, bb: 33}]);
      expect(parser.serialize(t)).toEqual("/a/b;aa=22;bb=33");
    });

    describe("node reuse", () => {
      it('should reuse nodes when path is the same', () => {
        let p = parser.parse("/a/b");
        let tree = s(p.root);
        let t = link(tree.root, tree, p, ['/a/c']);

        expect(t.root).toBe(p.root);
        expect(t.firstChild(t.root)).toBe(p.firstChild(p.root));
        expect(t.firstChild(t.firstChild(t.root))).not.toBe(p.firstChild(p.firstChild(p.root)));
      });

      it("should create new node when params are the same", () => {
        let p = parser.parse("/a;x=1");
        let tree = s(p.root);
        let t = link(tree.root, tree, p, ['/a', {'x': 1}]);

        expect(t.firstChild(t.root)).toBe(p.firstChild(p.root));
      });

      it("should create new node when params are different", () => {
        let p = parser.parse("/a;x=1");
        let tree = s(p.root);
        let t = link(tree.root, tree, p, ['/a', {'x': 2}]);

        expect(t.firstChild(t.root)).not.toBe(p.firstChild(p.root));
      });
    });

    describe("relative navigation", () => {
      it("should work", () => {
        let p = parser.parse("/a(ap)/c(cp)");
        let c = p.firstChild(p.root);
        let tree = s(c);
        let t = link(tree.root, tree, p, ["c2"]);
        expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
      });

      it("should work when the first command starts with a ./", () => {
        let p = parser.parse("/a(ap)/c(cp)");
        let c = p.firstChild(p.root);
        let tree = s(c);
        let t = link(tree.root, tree, p, ["./c2"]);
        expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
      });

      it("should work when the first command is ./)", () => {
        let p = parser.parse("/a(ap)/c(cp)");
        let c = p.firstChild(p.root);
        let tree = s(c);
        let t = link(tree.root, tree, p, ["./", "c2"]);
        expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
      });

      it("should work when given params", () => {
        let p = parser.parse("/a(ap)/c(cp)");
        let c = p.firstChild(p.root);
        let tree = s(c);
        let t = link(tree.root, tree, p, [{'x': 99}]);

        expect(parser.serialize(t)).toEqual("/a(aux:ap)/c;x=99(aux:cp)");
      });

      it("should support going to a parent", () => {
        let p = parser.parse("/a(ap)/c(cp)");
        let a = p.firstChild(p.root);
        let tree = s(a);
        let t = link(tree.root, tree, p, ["../a2"]);
        expect(parser.serialize(t)).toEqual("/a2(aux:ap)");
      });

      it("should support going to a parent (nested case)", () => {
        let p = parser.parse("/a/c");
        let c = p.firstChild(p.firstChild(p.root));
        let tree = s(c);
        let t = link(tree.root, tree, p, ["../c2"]);
        expect(parser.serialize(t)).toEqual("/a/c2");
      });

      it("should work when given ../", () => {
        let p = parser.parse("/a/c");
        let c = p.firstChild(p.firstChild(p.root));
        let tree = s(c);
        let t = link(tree.root, tree, p, ["../"]);
        expect(parser.serialize(t)).toEqual("/a");
      });

      it("should navigate to the root", () => {
        let p = parser.parse("/a/c");
        let c = p.firstChild(p.root);
        let tree = s(c);
        let t = link(tree.root, tree, p, ["../"]);
        expect(parser.serialize(t)).toEqual("");
      });

      it("should support setting matrix params", () => {
        let p = parser.parse("/a(ap)/c(cp)");
        let c = p.firstChild(p.root);
        let tree = s(c);
        let t = link(tree.root, tree, p, ["../", {'x': 5}]);
        expect(parser.serialize(t)).toEqual("/a;x=5(aux:ap)");
      });

      it("should throw when too many ..", () => {
        let p = parser.parse("/a(ap)/c(cp)");
        let c = p.firstChild(p.root);
        let tree = s(c);

        expect(() => link(tree.root, tree, p, ["../../"])).toThrowError("Invalid number of '../'");
      });

      it("should work when the provided segment doesn't have url segments", () => {
        let p = parser.parse("/a(ap)/c(cp)");
        let c = p.firstChild(p.root);

        let child = new RouteSegment([], {'one': '1'}, null, null, null);
        let root = new TreeNode<RouteSegment>(new RouteSegment([c], {}, null, null, null),
                                              [new TreeNode<RouteSegment>(child, [])]);
        let tree = new RouteTree(root);

        let t = link(child, tree, p, ["./c2"]);
        expect(parser.serialize(t)).toEqual("/a(aux:ap)/c2(aux:cp)");
      });
    });
  });
}

function s(u: UrlSegment): RouteTree {
  let root = new TreeNode<RouteSegment>(new RouteSegment([u], {}, null, null, null), []);
  return new RouteTree(root);
}