// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

library dart.pkg.isolate.test.registry;

import 'dart:async';
import 'dart:isolate';

import 'package:isolate/isolate_runner.dart';
import 'package:isolate/registry.dart';

import 'package:unittest/unittest.dart';

const MS = const Duration(milliseconds: 1);

void main() {
  testLookup();
  testAddLookup();
  testAddRemoveTags();
  testRemove();
  testCrossIsolate();
  testTimeout();
  testMultiRegistry();
  testObjectsAndTags();
}

class Oddity {
  static const int EVEN = 0;
  static const int ODD = 1;
}

Future<List> waitAll(int n, Future action(int n)) {
  return Future.wait(new Iterable.generate(n, action));
}

void testLookup() {
  test("lookupAll", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    return waitAll(10, (i) {
      var element = new Element(i);
      var tag = i.isEven ? Oddity.EVEN : Oddity.ODD;
      return registry.add(element, tags: [tag]);
    }).then((_) {
      return registry.lookup();
    }).then((all) {
      expect(all.length, 10);
      expect(all.map((v) => v.id).toList()..sort(),
             [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
    })
    .whenComplete(regman.close);
  });

  test("lookupOdd", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    return waitAll(10, (i) {
      var element = new Element(i);
      var tag = i.isEven ? Oddity.EVEN : Oddity.ODD;
      return registry.add(element, tags: [tag]);
    }).then((_) {
      return registry.lookup(tags:[Oddity.ODD]);
    }).then((all) {
      expect(all.length, 5);
      expect(all.map((v) => v.id).toList()..sort(),
             [1, 3, 5, 7, 9]);
    })
    .whenComplete(regman.close);
  });

  test("lookupMax", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    return waitAll(10, (i) {
      var element = new Element(i);
      var tag = i.isEven ? Oddity.EVEN : Oddity.ODD;
      return registry.add(element, tags: [tag]);
    }).then((_) {
      return registry.lookup(max: 5);
    }).then((all) {
      expect(all.length, 5);
    })
    .whenComplete(regman.close);
  });

  test("lookupMultiTag", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    return waitAll(25, (i) {
      var element = new Element(i);
      // Collect all numbers dividing i.
      var tags = [i];
      for (int j = 2; j < 25; j++) {
        if (i % j == 0) tags.add(j);
      }
      return registry.add(element, tags: tags);
    }).then((_) {
      return registry.lookup(tags: [2, 3]);
    }).then((all) {
      expect(all.length, 5);
      expect(all.map((v) => v.id).toList()..sort(),
             [0, 6, 12, 18, 24]);
    })
    .whenComplete(regman.close);
  });

  test("lookupMultiTagMax", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    return waitAll(25, (i) {
      var element = new Element(i);
      // Collect all numbers dividing i.
      var tags = [i];
      for (int j = 2; j < 25; j++) {
        if (i % j == 0) tags.add(j);
      }
      return registry.add(element, tags: tags);
    }).then((_) {
      return registry.lookup(tags: [2, 3], max: 3);
    }).then((all) {
      expect(all.length, 3);
      expect(all.every((v) => (v.id % 6) == 0), isTrue);
    })
    .whenComplete(regman.close);
  });
}

void testAddLookup() {
  test("Add-lookup-identical", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object = new Object();
    return registry.add(object).then((_) {
      return registry.lookup();
    }).then((entries) {
      expect(entries, hasLength(1));
      expect(entries.first, same(object));
    }).whenComplete(regman.close);
  });

  test("Add-multiple-identical", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object1 = new Object();
    var object2 = new Object();
    var object3 = new Object();
    var objects = [object1, object2, object3];
    return Future.wait(objects.map(registry.add)).then((_) {
      return registry.lookup();
    }).then((entries) {
      expect(entries, hasLength(3));
      for (var entry in entries) {
        expect(entry, isIn(objects));
      }
    }).whenComplete(regman.close);
  });

  test("Add-twice", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object = new Object();
    return registry.add(object).then((_) {
      return registry.add(object);
    }).then((_) {
      fail("Unreachable");
    }, onError: (e, s) {
      expect(e, isStateError);
    }).whenComplete(regman.close);
  });

  test("Add-lookup-add-lookup", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object = new Object();
    var object2 = new Object();
    return registry.add(object).then((_) {
      return registry.lookup();
    }).then((entries) {
      expect(entries, hasLength(1));
      expect(entries.first, same(object));
      return registry.add(object2);
    }).then((_) {
      return registry.lookup();
    }).then((entries) {
      expect(entries, hasLength(2));
      var entry1 = entries.first;
      var entry2 = entries.last;
      if (object == entry1) {
        expect(entry2, same(object2));
      } else {
        expect(entry1, same(object));
      }
    }).whenComplete(regman.close);
  });

  test("lookup-add-lookup", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object = new Object();
    return registry.lookup().then((entries) {
      expect(entries, isEmpty);
      return registry.add(object);
    }).then((_) {
      return registry.lookup();
    }).then((entries) {
      expect(entries, hasLength(1));
      expect(entries.first, same(object));
    }).whenComplete(regman.close);
  });

  test("Add-multiple-tags", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object1 = new Object();
    var object2 = new Object();
    var object3 = new Object();
    return registry.add(object1, tags: [1, 3, 5, 7]).then((_) {
      return registry.add(object2, tags: [2, 3, 6, 7]);
    }).then((_) {
      return registry.add(object3, tags: [4, 5, 6, 7]);
    }).then((_) {
      return registry.lookup(tags: [3]);
    }).then((entries) {
      expect(entries, hasLength(2));
      expect(entries.first == object1 || entries.last == object1, isTrue);
      expect(entries.first == object2 || entries.last == object2, isTrue);
    }).then((_) {
      return registry.lookup(tags: [2]);
    }).then((entries) {
      expect(entries, hasLength(1));
      expect(entries.first, same(object2));
    }).then((_) {
      return registry.lookup(tags: [3, 6]);
    }).then((entries) {
      expect(entries, hasLength(1));
      expect(entries.first, same(object2));
    }).whenComplete(regman.close);
  });
}

void testRemove() {
  test("Add-remove", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object = new Object();
    return registry.add(object).then((removeCapability) {
      return registry.lookup().then((entries) {
        expect(entries, hasLength(1));
        expect(entries.first, same(object));
        return registry.remove(object, removeCapability);
      });
    }).then((removeSuccess) {
      expect(removeSuccess, isTrue);
      return registry.lookup();
    }).then((entries) {
      expect(entries, isEmpty);
    }).whenComplete(regman.close);
  });

  test("Add-remove-fail", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object = new Object();
    return registry.add(object).then((removeCapability) {
      return registry.lookup().then((entries) {
        expect(entries, hasLength(1));
        expect(entries.first, same(object));
        return registry.remove(object, new Capability());
      });
    }).then((removeSuccess) {
      expect(removeSuccess, isFalse);
    }).whenComplete(regman.close);
  });
}

void testAddRemoveTags() {
  test("Add-remove-tag", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object = new Object();
    return registry.add(object).then((removeCapability) {
      return registry.lookup(tags: ["x"]);
    }).then((entries) {
      expect(entries, isEmpty);
      return registry.addTags([object], ["x"]);
    }).then((_) {
      return registry.lookup(tags: ["x"]);
    }).then((entries) {
      expect(entries, hasLength(1));
      expect(entries.first, same(object));
      return registry.removeTags([object], ["x"]);
    }).then((_) {
      return registry.lookup(tags: ["x"]);
    }).then((entries) {
      expect(entries, isEmpty);
    }).whenComplete(regman.close);
  });

  test("Tag-twice", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object = new Object();
    return registry.add(object, tags: ["x"]).then((removeCapability) {
      return registry.lookup(tags: ["x"]);
    }).then((entries) {
      expect(entries, hasLength(1));
      expect(entries.first, same(object));
      // Adding the same tag twice is allowed, but does nothing.
      return registry.addTags([object], ["x"]);
    }).then((_) {
      return registry.lookup(tags: ["x"]);
    }).then((entries) {
      expect(entries, hasLength(1));
      expect(entries.first, same(object));
      // Removing the tag once is enough to remove it.
      return registry.removeTags([object], ["x"]);
    }).then((_) {
      return registry.lookup(tags: ["x"]);
    }).then((entries) {
      expect(entries, isEmpty);
    }).whenComplete(regman.close);
  });

  test("Add-remove-multiple", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    var object1 = new Object();
    var object2 = new Object();
    var object3 = new Object();
    var objects = [object1, object2, object3];
    return Future.wait(objects.map(registry.add)).then((_) {
      return registry.addTags([object1, object2], ["x", "y"]);
    }).then((_) {
      return registry.addTags([object1, object3], ["z", "w"]);
    }).then((_) {
      return registry.lookup(tags: ["x", "z"]);
    }).then((entries) {
      expect(entries, hasLength(1));
      expect(entries.first, same(object1));
      return registry.removeTags([object1, object2], ["x", "z"]);
    }).then((_) {
      return registry.lookup(tags: ["z"]);
    }).then((entries) {
      expect(entries, hasLength(1));
      expect(entries.first, same(object3));
    }).whenComplete(regman.close);
  });

  test("Remove-wrong-object", () {
    RegistryManager regman = new RegistryManager();
    Registry registry = regman.registry;
    expect(() => registry.removeTags([new Object()], ["x"]), throws);
    regman.close();
  });
}

var _regmen = {};
Registry createRegMan(id) {
  var regman = new RegistryManager();
  _regmen[id] = regman;
  return regman.registry;
}
void closeRegMan(id) {
  _regmen.remove(id).close();
}

void testCrossIsolate() {
  var object = new Object();
  test("regman-other-isolate", () {
    // Add, lookup and remove object in other isolate.
    return IsolateRunner.spawn().then((isolate) {
      isolate.run(createRegMan, 1).then((registry) {
        return registry.add(object, tags: ["a", "b"]).then((removeCapability) {
          return registry.lookup(tags: ["a"]).then((entries) {
            expect(entries, hasLength(1));
            expect(entries.first, same(object));
            return registry.remove(entries.first, removeCapability);
          }).then((removeSuccess) {
            expect(removeSuccess, isTrue);
          });
        });
      }).whenComplete(() {
        return isolate.run(closeRegMan, 1);
      }).whenComplete(() {
        return isolate.close();
      });
    });
  });
}

void testTimeout() {
  test("Timeout-add", () {
    RegistryManager regman = new RegistryManager(timeout: MS * 500);
    Registry registry = regman.registry;
    regman.close();
    return registry.add(new Object()).then((_) {
      fail("unreachable");
    }, onError: (e, s) {
      expect(e is TimeoutException, isTrue);
    });
  });

  test("Timeout-remove", () {
    RegistryManager regman = new RegistryManager(timeout: MS * 500);
    Registry registry = regman.registry;
    var object = new Object();
    return registry.add(object).then((rc) {
      regman.close();
      return registry.remove(object, rc).then((_) {
        fail("unreachable");
      }, onError: (e, s) {
        expect(e is TimeoutException, isTrue);
      });
    });
  });

  test("Timeout-addTags", () {
    RegistryManager regman = new RegistryManager(timeout: MS * 500);
    Registry registry = regman.registry;
    var object = new Object();
    return registry.add(object).then((rc) {
      regman.close();
      return registry.addTags([object], ["x"]).then((_) {
        fail("unreachable");
      }, onError: (e, s) {
        expect(e is TimeoutException, isTrue);
      });
    });
  });

  test("Timeout-removeTags", () {
    RegistryManager regman = new RegistryManager(timeout: MS * 500);
    Registry registry = regman.registry;
    var object = new Object();
    return registry.add(object).then((rc) {
      regman.close();
      return registry.removeTags([object], ["x"]).then((_) {
        fail("unreachable");
      }, onError: (e, s) {
        expect(e is TimeoutException, isTrue);
      });
    });
  });

  test("Timeout-lookup", () {
    RegistryManager regman = new RegistryManager(timeout: MS * 500);
    Registry registry = regman.registry;
    regman.close();
    registry.lookup().then((_) {
      fail("unreachable");
    }, onError: (e, s) {
      expect(e is TimeoutException, isTrue);
    });
  });
}

void testMultiRegistry() {
  test("dual-registry", () {
    RegistryManager regman = new RegistryManager();
    Registry registry1 = regman.registry;
    Registry registry2 = regman.registry;
    var l1 = ["x"];
    var l2;
    return registry1.add(l1, tags: ["y"]).then((removeCapability) {
      return registry2.lookup().then((entries) {
        expect(entries, hasLength(1));
        l2 = entries.first;
        expect(l2, equals(l1));
        // The object for registry2 is not idential the one for registry1.
        expect(!identical(l1, l2), isTrue);
        // Removeing the registry1 object through registry2 doesn't work.
        return registry2.remove(l1, removeCapability);
      }).then((removeSuccess) {
        expect(removeSuccess, isFalse);
        return registry2.remove(l2, removeCapability);
      }).then((removeSuccess) {
        expect(removeSuccess, isTrue);
        return registry1.lookup();
      }).then((entries) {
        expect(entries, isEmpty);
      });
    }).whenComplete(regman.close);
  });
}

void testObjectsAndTags() {
  testObject(object) {
    String name = "Transfer-${object.runtimeType}";
    test(name, () {
      RegistryManager regman = new RegistryManager();
      Registry registry1 = regman.registry;
      Registry registry2 = regman.registry;
      return registry1.add(object, tags: [object]).then((removeCapability) {
        return registry2.lookup().then((entries) {
          expect(entries, hasLength(1));
          expect(entries.first, equals(object));
          return registry2.lookup(tags: [object]);
        }).then((entries) {
          expect(entries, hasLength(1));
          expect(entries.first, equals(object));
          return registry2.removeTags([entries.first], [object]);
        }).then((_) {
          return registry2.lookup();
        }).then((entries) {
          expect(entries, hasLength(1));
          expect(entries.first, equals(object));
          return registry2.remove(entries.first, removeCapability);
        }).then((removeSuccess) {
          expect(removeSuccess, isTrue);
          return registry2.lookup();
        }).then((entries) {
          expect(entries, isEmpty);
        });
      }).whenComplete(regman.close);
    });
  }
  // Test objects that are sendable between equivalent isolates and
  // that has an operator== that works after cloning (for use as tags).
  testObject(42);
  testObject(3.14);
  testObject("string");
  testObject(true);
  testObject(null);
  testObject(new Element(42));
  testObject(#symbol);
  testObject(#_privateSymbol);
  testObject(new Capability());
  testObject(topLevelFunction);
}

class Element {
  final int id;
  Element(this.id);
  int get hashCode => id;
  bool operator ==(Object other) => other is Element && id == other.id;
}

void topLevelFunction() {}