import {DefaultUrlSerializer} from '../src/url_serializer';
import {UrlTree, UrlPathWithParams, UrlSegment} from '../src/url_tree';
import {ActivatedRoute, ActivatedRouteSnapshot, advanceActivatedRoute} from '../src/router_state';
import {PRIMARY_OUTLET, Params} from '../src/shared';
import {createUrlTree} from '../src/create_url_tree';
import {BehaviorSubject} from 'rxjs/BehaviorSubject';

describe('createUrlTree', () => {
  const serializer = new DefaultUrlSerializer();

  it("should navigate to the root", () => {
    const p = serializer.parse("/");
    const t = createRoot(p, ["/"]);
    expect(serializer.serialize(t)).toEqual("/");
  });

  it("should support nested segments", () => {
    const p = serializer.parse("/a/b");
    const t = createRoot(p, ["/one", 11, "two", 22]);
    expect(serializer.serialize(t)).toEqual("/one/11/two/22");
  });

  
  it("should stringify positional parameters", () => {
    const p = serializer.parse("/a/b");
    const t = createRoot(p, ["/one", 11]);
    const params = t.root.children[PRIMARY_OUTLET].pathsWithParams;
    expect(params[0].path).toEqual("one");
    expect(params[1].path).toEqual("11");
  });

  it("should preserve secondary segments", () => {
    const p = serializer.parse("/a/11/b(right:c)");
    const t = createRoot(p, ["/a", 11, 'd']);
    expect(serializer.serialize(t)).toEqual("/a/11/d(right:c)");
  });

  it("should support updating secondary segments", () => {
    const p = serializer.parse("/a(right:b)");
    const t = createRoot(p, ["right:c", 11, 'd']);
    expect(serializer.serialize(t)).toEqual("/a(right:c/11/d)");
  });

  it("should support updating secondary segments (nested case)", () => {
    const p = serializer.parse("/a/(b//right:c)");
    const t = createRoot(p, ["a", "right:d", 11, 'e']);
    expect(serializer.serialize(t)).toEqual("/a/(b//right:d/11/e)");
  });
  
  it('should update matrix parameters', () => {
    const p = serializer.parse("/a;pp=11");
    const t = createRoot(p, ["/a", {pp: 22, dd: 33}]);
    expect(serializer.serialize(t)).toEqual("/a;pp=22;dd=33");
  });

  it('should create matrix parameters', () => {
    const p = serializer.parse("/a");
    const t = createRoot(p, ["/a", {pp: 22, dd: 33}]);
    expect(serializer.serialize(t)).toEqual("/a;pp=22;dd=33");
  });

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

  describe("relative navigation", () => {
    it("should work", () => {
      const p = serializer.parse("/a/(c//left:cp)(left:ap)");
      const t = create(p.root.children[PRIMARY_OUTLET], 0, p, ["c2"]);
      expect(serializer.serialize(t)).toEqual("/a/(c2//left:cp)(left:ap)");
    });

    it("should work when the first command starts with a ./", () => {
      const p = serializer.parse("/a/(c//left:cp)(left:ap)");
      const t = create(p.root.children[PRIMARY_OUTLET], 0, p, ["./c2"]);
      expect(serializer.serialize(t)).toEqual("/a/(c2//left:cp)(left:ap)");
    });

    it("should work when the first command is ./)", () => {
      const p = serializer.parse("/a/(c//left:cp)(left:ap)");
      const t = create(p.root.children[PRIMARY_OUTLET], 0, p, ["./", "c2"]);
      expect(serializer.serialize(t)).toEqual("/a/(c2//left:cp)(left:ap)");
    });

    it("should work when given params", () => {
      const p = serializer.parse("/a/(c//left:cp)(left:ap)");
      const t = create(p.root.children[PRIMARY_OUTLET], 0, p, [{'x': 99}]);
      expect(serializer.serialize(t)).toEqual("/a/(c;x=99//left:cp)(left:ap)");
    });

    it("should work when index > 0", () => {
      const p = serializer.parse("/a/c");
      const t = create(p.root.children[PRIMARY_OUTLET], 1, p, ["c2"]);
      expect(serializer.serialize(t)).toEqual("/a/c/c2");
    });

    it("should support going to a parent (within a segment)", () => {
      const p = serializer.parse("/a/c");
      const t = create(p.root.children[PRIMARY_OUTLET], 1, p, ["../c2"]);
      expect(serializer.serialize(t)).toEqual("/a/c2");
    });

    it("should work when given ../", () => {
      const p = serializer.parse("/a/c");
      const t = create(p.root.children[PRIMARY_OUTLET], 1, p, ["../", "c2"]);
      expect(serializer.serialize(t)).toEqual("/a/c2");
    });

    it("should support setting matrix params", () => {
      const p = serializer.parse("/a/(c//left:cp)(left:ap)");
      const t = create(p.root.children[PRIMARY_OUTLET], 0, p, ['../', {x: 5}]);
      expect(serializer.serialize(t)).toEqual("/a;x=5(left:ap)");
    });

    xit("should support going to a parent (across segments)", () => {
      const p = serializer.parse("/q/(a/(c//left:cp)//left:qp)(left:ap)");

      const t = create(p.root.children[PRIMARY_OUTLET].children[PRIMARY_OUTLET], 0, p, ['../../q2']);
      expect(serializer.serialize(t)).toEqual("/q2(left:ap)");
    });

    xit("should navigate to the root", () => {
      const p = serializer.parse("/a/c");
      const t = create(p.root.children[PRIMARY_OUTLET], 0, p, ['../']);
      expect(serializer.serialize(t)).toEqual("");
    });

    it("should throw when too many ..", () => {
      const p = serializer.parse("/a/(c//left:cp)(left:ap)");
      expect(() => create(p.root.children[PRIMARY_OUTLET], 0, p, ['../../'])).toThrowError("Invalid number of '../'");
    });
  });

  it("should set query params", () => {
    const p = serializer.parse("/");
    const t = createRoot(p, [], {a: 'hey'});
    expect(t.queryParams).toEqual({a: 'hey'});
  });

  it("should stringify query params", () => {
    const p = serializer.parse("/");
    const t = createRoot(p, [], <any>{a: 1});
    expect(t.queryParams).toEqual({a: '1'});
  });

  it("should reuse old query params when given undefined", () => {
    const p = serializer.parse("/?a=1");
    const t = createRoot(p, [], undefined);
    expect(t.queryParams).toEqual({a: '1'});
  });

  it("should set fragment", () => {
    const p = serializer.parse("/");
    const t = createRoot(p, [], {}, "fragment");
    expect(t.fragment).toEqual("fragment");
  });

  it("should reused old fragment when given undefined", () => {
    const p = serializer.parse("/#fragment");
    const t = createRoot(p, [], undefined, undefined);
    expect(t.fragment).toEqual("fragment");
  });
});

function createRoot(tree: UrlTree, commands: any[], queryParams?: Params, fragment?: string) {
  const s = new ActivatedRouteSnapshot([], <any>{}, PRIMARY_OUTLET, "someComponent", null, tree.root, -1);
  const a = new ActivatedRoute(new BehaviorSubject(null), new BehaviorSubject(null), PRIMARY_OUTLET, "someComponent", s);
  advanceActivatedRoute(a);
  return createUrlTree(a, tree, commands, queryParams, fragment);
}

function create(segment: UrlSegment, startIndex: number, tree: UrlTree, commands: any[], queryParams?: Params, fragment?: string) {
  if (!segment) {
    expect(segment).toBeDefined();
  }
  const s = new ActivatedRouteSnapshot([], <any>{}, PRIMARY_OUTLET, "someComponent", null, <any>segment, startIndex);
  const a = new ActivatedRoute(new BehaviorSubject(null), new BehaviorSubject(null), PRIMARY_OUTLET, "someComponent", s);
  advanceActivatedRoute(a);
  return createUrlTree(a, tree, commands, queryParams, fragment);
}