const {
  test2DocRef,
  COL2_DOC_1,
  COL2_DOC_1_ID,
  COL2_DOC_1_PATH,
  TEST2_COLLECTION_NAME,
  resetTestCollectionDoc,
} = TestHelpers.firestore;

describe('firestore()', () => {
  describe('DocumentReference', () => {
    before(async () => {
      await resetTestCollectionDoc(COL2_DOC_1_PATH, COL2_DOC_1());
    });

    describe('class', () => {
      it('should return instance methods', () => {
        const document = test2DocRef(COL2_DOC_1_ID);
        document.should.have.property('firestore');
        // TODO: Remaining checks
      });
    });

    describe('id', () => {
      it('should return document id', () => {
        const document = test2DocRef(COL2_DOC_1_ID);
        document.id.should.equal(COL2_DOC_1_ID);
      });
    });

    describe('parent', () => {
      it('should return parent collection', () => {
        const document = test2DocRef(COL2_DOC_1_ID);
        document.parent.id.should.equal(TEST2_COLLECTION_NAME);
      });
    });

    describe('collection()', () => {
      it('should return a child collection', () => {
        const document = test2DocRef(COL2_DOC_1_ID);
        const collection = document.collection('pages');
        collection.id.should.equal('pages');
      });

      it('should error if invalid collection path supplied', () => {
        (() => {
          test2DocRef(COL2_DOC_1_ID).collection('pages/page1');
        }).should.throw(
          'Argument "collectionPath" must point to a collection.'
        );
      });
    });

    describe('delete()', () => {
      it('should delete Document', async () => {
        await resetTestCollectionDoc(COL2_DOC_1_PATH, COL2_DOC_1());
        await test2DocRef(COL2_DOC_1_ID).delete();
        const doc = await test2DocRef(COL2_DOC_1_ID).get();
        should.equal(doc.exists, false);
      });
    });

    describe('get()', () => {
      it('DocumentSnapshot should have correct properties', async () => {
        await resetTestCollectionDoc(COL2_DOC_1_PATH, COL2_DOC_1());
        const snapshot = await test2DocRef(COL2_DOC_1_ID).get();
        snapshot.id.should.equal(COL2_DOC_1_ID);
        snapshot.metadata.should.be.an.Object();
      });
    });

    describe('onSnapshot()', () => {
      it('calls callback with the initial data and then when value changes', async () => {
        await resetTestCollectionDoc(COL2_DOC_1_PATH, { name: 'doc1' });
        const docRef = test2DocRef(COL2_DOC_1_ID);
        const currentDataValue = { name: 'doc1' };
        const newDataValue = { name: 'updated' };

        const callback = sinon.spy();

        // Test

        let unsubscribe;
        await new Promise(resolve2 => {
          unsubscribe = docRef.onSnapshot(snapshot => {
            callback(snapshot.data());
            resolve2();
          });
        });

        callback.should.be.calledWith(currentDataValue);

        // Update the document

        await docRef.set(newDataValue);

        await sleep(50);

        // Assertions

        callback.should.be.calledWith(newDataValue);
        callback.should.be.calledTwice();

        // Tear down

        unsubscribe();
      });

      it("doesn't call callback when the ref is updated with the same value", async () => {
        await resetTestCollectionDoc(COL2_DOC_1_PATH, { name: 'doc1' });
        const docRef = test2DocRef(COL2_DOC_1_ID);
        const currentDataValue = { name: 'doc1' };

        const callback = sinon.spy();

        // Test

        let unsubscribe;
        await new Promise(resolve2 => {
          unsubscribe = docRef.onSnapshot(snapshot => {
            callback(snapshot.data());
            resolve2();
          });
        });

        callback.should.be.calledWith(currentDataValue);

        await docRef.set(currentDataValue);

        await sleep(50);

        // Assertions

        callback.should.be.calledOnce(); // Callback is not called again

        // Tear down

        unsubscribe();
      });

      it('allows binding multiple callbacks to the same ref', async () => {
        // Setup
        await resetTestCollectionDoc(COL2_DOC_1_PATH, { name: 'doc1' });
        const docRef = test2DocRef(COL2_DOC_1_ID);
        const currentDataValue = { name: 'doc1' };
        const newDataValue = { name: 'updated' };

        const callbackA = sinon.spy();
        const callbackB = sinon.spy();

        // Test
        let unsubscribeA;
        let unsubscribeB;
        await new Promise(resolve2 => {
          unsubscribeA = docRef.onSnapshot(snapshot => {
            callbackA(snapshot.data());
            resolve2();
          });
        });

        await new Promise(resolve2 => {
          unsubscribeB = docRef.onSnapshot(snapshot => {
            callbackB(snapshot.data());
            resolve2();
          });
        });

        callbackA.should.be.calledWith(currentDataValue);
        callbackA.should.be.calledOnce();

        callbackB.should.be.calledWith(currentDataValue);
        callbackB.should.be.calledOnce();

        await docRef.set(newDataValue);

        await sleep(50);

        callbackA.should.be.calledWith(newDataValue);
        callbackB.should.be.calledWith(newDataValue);

        callbackA.should.be.calledTwice();
        callbackB.should.be.calledTwice();

        // Tear down

        unsubscribeA();
        unsubscribeB();
      });

      it('listener stops listening when unsubscribed', async () => {
        await resetTestCollectionDoc(COL2_DOC_1_PATH, { name: 'doc1' });

        // Setup
        const docRef = test2DocRef(COL2_DOC_1_ID);
        const currentDataValue = { name: 'doc1' };
        const newDataValue = { name: 'updated' };

        const callbackA = sinon.spy();
        const callbackB = sinon.spy();

        // Test
        let unsubscribeA;
        let unsubscribeB;
        await new Promise(resolve2 => {
          unsubscribeA = docRef.onSnapshot(snapshot => {
            callbackA(snapshot.data());
            resolve2();
          });
        });

        await new Promise(resolve2 => {
          unsubscribeB = docRef.onSnapshot(snapshot => {
            callbackB(snapshot.data());
            resolve2();
          });
        });

        callbackA.should.be.calledWith(currentDataValue);
        callbackA.should.be.calledOnce();

        callbackB.should.be.calledWith(currentDataValue);
        callbackB.should.be.calledOnce();

        await docRef.set(newDataValue);

        await sleep(50);

        callbackA.should.be.calledWith(newDataValue);
        callbackB.should.be.calledWith(newDataValue);

        callbackA.should.be.calledTwice();
        callbackB.should.be.calledTwice();

        // Unsubscribe A

        unsubscribeA();

        await docRef.set(currentDataValue);

        await sleep(50);

        callbackB.should.be.calledWith(currentDataValue);

        callbackA.should.be.calledTwice();
        callbackB.should.be.calledThrice();

        // Unsubscribe B

        unsubscribeB();

        await docRef.set(newDataValue);

        await sleep(50);

        callbackA.should.be.calledTwice();
        callbackB.should.be.calledThrice();
      });

      it('supports options and callbacks', async () => {
        await resetTestCollectionDoc(COL2_DOC_1_PATH, { name: 'doc1' });
        const docRef = test2DocRef(COL2_DOC_1_ID);
        const currentDataValue = { name: 'doc1' };
        const newDataValue = { name: 'updated' };

        const callback = sinon.spy();

        // Test

        let unsubscribe;
        await new Promise(resolve2 => {
          unsubscribe = docRef.onSnapshot(
            { includeMetadataChanges: true },
            snapshot => {
              callback(snapshot.data());
              resolve2();
            }
          );
        });

        callback.should.be.calledWith(currentDataValue);

        // Update the document

        await docRef.set(newDataValue);

        await sleep(50);

        // Assertions

        callback.should.be.calledWith(newDataValue);

        // Tear down

        unsubscribe();
      });

      it('supports observer', async () => {
        await resetTestCollectionDoc(COL2_DOC_1_PATH, { name: 'doc1' });
        const docRef = test2DocRef(COL2_DOC_1_ID);
        const currentDataValue = { name: 'doc1' };
        const newDataValue = { name: 'updated' };

        const callback = sinon.spy();

        // Test

        let unsubscribe;
        await new Promise(resolve2 => {
          const observer = {
            next: snapshot => {
              callback(snapshot.data());
              resolve2();
            },
          };
          unsubscribe = docRef.onSnapshot(observer);
        });

        callback.should.be.calledWith(currentDataValue);

        // Update the document

        await docRef.set(newDataValue);

        await sleep(50);

        // Assertions

        callback.should.be.calledWith(newDataValue);
        callback.should.be.calledTwice();

        // Tear down

        unsubscribe();
      });

      it('supports options and observer', async () => {
        await resetTestCollectionDoc(COL2_DOC_1_PATH, { name: 'doc1' });
        const docRef = test2DocRef(COL2_DOC_1_ID);
        const currentDataValue = { name: 'doc1' };
        const newDataValue = { name: 'updated' };

        const callback = sinon.spy();

        // Test

        let unsubscribe;
        await new Promise(resolve2 => {
          const observer = {
            next: snapshot => {
              callback(snapshot.data());
              resolve2();
            },
            error: () => {},
          };
          unsubscribe = docRef.onSnapshot(
            { includeMetadataChanges: true },
            observer
          );
        });

        callback.should.be.calledWith(currentDataValue);

        // Update the document

        await docRef.set(newDataValue);

        await sleep(50);

        // Assertions

        callback.should.be.calledWith(newDataValue);

        // Tear down

        unsubscribe();
      });

      it('errors when invalid parameters supplied', async () => {
        const docRef = test2DocRef(COL2_DOC_1_ID);
        (() => {
          docRef.onSnapshot(() => {}, 'error');
        }).should.throw(
          'DocumentReference.onSnapshot failed: Second argument must be a valid function.'
        );
        (() => {
          docRef.onSnapshot({
            next: () => {},
            error: 'error',
          });
        }).should.throw(
          'DocumentReference.onSnapshot failed: Observer.error must be a valid function.'
        );
        (() => {
          docRef.onSnapshot({
            next: 'error',
          });
        }).should.throw(
          'DocumentReference.onSnapshot failed: Observer.next must be a valid function.'
        );
        (() => {
          docRef.onSnapshot(
            {
              includeMetadataChanges: true,
            },
            () => {},
            'error'
          );
        }).should.throw(
          'DocumentReference.onSnapshot failed: Third argument must be a valid function.'
        );
        (() => {
          docRef.onSnapshot(
            {
              includeMetadataChanges: true,
            },
            {
              next: () => {},
              error: 'error',
            }
          );
        }).should.throw(
          'DocumentReference.onSnapshot failed: Observer.error must be a valid function.'
        );
        (() => {
          docRef.onSnapshot(
            {
              includeMetadataChanges: true,
            },
            {
              next: 'error',
            }
          );
        }).should.throw(
          'DocumentReference.onSnapshot failed: Observer.next must be a valid function.'
        );
        (() => {
          docRef.onSnapshot(
            {
              includeMetadataChanges: true,
            },
            'error'
          );
        }).should.throw(
          'DocumentReference.onSnapshot failed: Second argument must be a function or observer.'
        );
        (() => {
          docRef.onSnapshot({
            error: 'error',
          });
        }).should.throw(
          'DocumentReference.onSnapshot failed: First argument must be a function, observer or options.'
        );
        (() => {
          docRef.onSnapshot();
        }).should.throw(
          'DocumentReference.onSnapshot failed: Called with invalid arguments.'
        );
      });
    });

    describe('set()', () => {
      before(async () => {
        await resetTestCollectionDoc(COL2_DOC_1_PATH, { name: 'doc1' });
      });
      it('should create Document', async () => {
        await test2DocRef('doc2').set({ name: 'doc2', testArray: [] });
        const doc = await test2DocRef('doc2').get();
        doc.data().name.should.equal('doc2');
      });

      it('should merge Document', async () => {
        await test2DocRef(COL2_DOC_1_ID).set(
          { merge: 'merge' },
          { merge: true }
        );

        const doc = await test2DocRef(COL2_DOC_1_ID).get();
        doc.data().name.should.equal('doc1');
        doc.data().merge.should.equal('merge');
      });

      it('should overwrite Document', async () => {
        await test2DocRef(COL2_DOC_1_ID).set({ name: 'overwritten' });
        const doc = await test2DocRef(COL2_DOC_1_ID).get();
        doc.data().name.should.equal('overwritten');
      });
    });

    describe('update()', () => {
      beforeEach(async () => {
        await resetTestCollectionDoc(COL2_DOC_1_PATH, { name: 'doc1' });
      });

      it('should update Document using object', async () => {
        await test2DocRef(COL2_DOC_1_ID).update({ name: 'updated' });
        const doc = await test2DocRef(COL2_DOC_1_ID).get();
        doc.data().name.should.equal('updated');
      });

      it('should update Document using key/value pairs', async () => {
        await test2DocRef(COL2_DOC_1_ID).update('name', 'updated');
        const doc = await test2DocRef(COL2_DOC_1_ID).get();
        doc.data().name.should.equal('updated');
      });

      it('should update Document using FieldPath/value pair', async () => {
        await test2DocRef(COL2_DOC_1_ID).update(
          new firebase.firestore.FieldPath('name'),
          'Name'
        );
        const doc = await test2DocRef(COL2_DOC_1_ID).get();
        doc.data().name.should.equal('Name');
      });

      it('should update Document using nested FieldPath and value pair', async () => {
        await test2DocRef(COL2_DOC_1_ID).update(
          new firebase.firestore.FieldPath('nested', 'name'),
          'Nested Name'
        );
        const doc = await test2DocRef(COL2_DOC_1_ID).get();
        doc.data().nested.name.should.equal('Nested Name');
      });

      it('should update Document using multiple FieldPath/value pairs', async () => {
        await test2DocRef(COL2_DOC_1_ID).update(
          new firebase.firestore.FieldPath('nested', 'firstname'),
          'First Name',
          new firebase.firestore.FieldPath('nested', 'lastname'),
          'Last Name'
        );
        const doc = await test2DocRef(COL2_DOC_1_ID).get();
        doc.data().nested.firstname.should.equal('First Name');
        doc.data().nested.lastname.should.equal('Last Name');
      });

      it('errors when invalid parameters supplied', async () => {
        const docRef = test2DocRef(COL2_DOC_1_ID);
        (() => {
          docRef.update('error');
        }).should.throw(
          'DocumentReference.update failed: If using a single update argument, it must be an object.'
        );
        (() => {
          docRef.update('error1', 'error2', 'error3');
        }).should.throw(
          'DocumentReference.update failed: The update arguments must be either a single object argument, or equal numbers of key/value pairs.'
        );
        (() => {
          docRef.update(0, 'error');
        }).should.throw(
          'DocumentReference.update failed: Argument at index 0 must be a string or FieldPath'
        );
      });
    });

    describe('types', () => {
      it('should handle Boolean field', async () => {
        const docRef = test2DocRef('reference');
        await docRef.set({
          field: true,
        });

        const doc = await docRef.get();
        should.equal(doc.data().field, true);
      });

      it('should handle Date field', async () => {
        const date = new bridge.context.window.Date();
        const docRef = test2DocRef('reference');
        await docRef.set({
          field: date,
        });

        const doc = await docRef.get();
        doc.data().field.should.be.instanceof(bridge.context.window.Date);
        should.equal(doc.data().field.toISOString(), date.toISOString());
        should.equal(doc.data().field.getTime(), date.getTime());
      });

      it('should handle DocumentReference field', async () => {
        const docRef = test2DocRef('reference');
        await docRef.set({
          field: firebase.firestore().doc('test/field'),
        });

        const doc = await docRef.get();
        should.equal(doc.data().field.path, 'test/field');
      });

      it('should handle GeoPoint field', async () => {
        const docRef = test2DocRef('reference');
        await docRef.set({
          field: new firebase.firestore.GeoPoint(1.01, 1.02),
        });

        const doc = await docRef.get();
        should.equal(doc.data().field.latitude, 1.01);
        should.equal(doc.data().field.longitude, 1.02);
      });
    });
  });
});