/*
 * decaffeinate suggestions:
 * DS101: Remove unnecessary use of Array.from
 * DS102: Remove unnecessary code created because of implicit returns
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const sinon = require('sinon');
const chai = require('chai');
const should = chai.should();
const {
    expect
} = chai;
const modulePath = "../../../../app/js/RangesManager.js";
const SandboxedModule = require('sandboxed-module');

describe("RangesManager", function() {
	beforeEach(function() {
		this.RangesManager = SandboxedModule.require(modulePath, {
			requires: {
				"logger-sharelatex": (this.logger = { error: sinon.stub(), log: sinon.stub(), warn: sinon.stub() })
			}
		});

		this.doc_id = "doc-id-123";
		this.project_id = "project-id-123";
		this.user_id = "user-id-123";
		return this.callback = sinon.stub();
	});

	describe("applyUpdate", function() {
		beforeEach(function() {
			this.updates = [{
				meta: {
					user_id: this.user_id
				},
				op: [{
					i: "two ",
					p: 4
				}]
			}];
			this.entries = {
				comments: [{
					op: {
						c: "three ",
						p: 4
					},
					metadata: {
						user_id: this.user_id
					}
				}],
				changes: [{
					op: {
						i: "five",
						p: 15
					},
					metadata: {
						user_id: this.user_id
					}
				}]
			};
			return this.newDocLines = ["one two three four five"];}); // old is "one three four five"
		
		describe("successfully", function() {
			beforeEach(function() {
				return this.RangesManager.applyUpdate(this.project_id, this.doc_id, this.entries, this.updates, this.newDocLines, this.callback);
			});
			
			return it("should return the modified the comments and changes", function() {
				this.callback.called.should.equal(true);
				const [error, entries, ranges_were_collapsed] = Array.from(this.callback.args[0]);
				expect(error).to.be.null;
				expect(ranges_were_collapsed).to.equal(false);
				entries.comments[0].op.should.deep.equal({
					c: "three ",
					p: 8
				});
				return entries.changes[0].op.should.deep.equal({
					i: "five",
					p: 19
				});
		});
	});
		
		describe("with empty comments", function() {
			beforeEach(function() {
				this.entries.comments = [];
				return this.RangesManager.applyUpdate(this.project_id, this.doc_id, this.entries, this.updates, this.newDocLines, this.callback);
			});
			
			return it("should return an object with no comments", function() {
				// Save space in redis and don't store just {}
				this.callback.called.should.equal(true);
				const [error, entries] = Array.from(this.callback.args[0]);
				expect(error).to.be.null;
				return expect(entries.comments).to.be.undefined;
			});
		});
		
		describe("with empty changes", function() {
			beforeEach(function() {
				this.entries.changes = [];
				return this.RangesManager.applyUpdate(this.project_id, this.doc_id, this.entries, this.updates, this.newDocLines, this.callback);
			});
			
			return it("should return an object with no changes", function() {
				// Save space in redis and don't store just {}
				this.callback.called.should.equal(true);
				const [error, entries] = Array.from(this.callback.args[0]);
				expect(error).to.be.null;
				return expect(entries.changes).to.be.undefined;
			});
		});
	
		describe("with too many comments", function() {
			beforeEach(function() {
				this.RangesManager.MAX_COMMENTS = 2;
				this.updates = [{
					meta: {
						user_id: this.user_id
					},
					op: [{
						c: "one",
						p: 0,
						t: "thread-id-1"
					}]
				}];
				this.entries = {
					comments: [{
						op: {
							c: "three ",
							p: 4,
							t: "thread-id-2"
						},
						metadata: {
							user_id: this.user_id
						}
					}, {
						op: {
							c: "four ",
							p: 10,
							t: "thread-id-3"
						},
						metadata: {
							user_id: this.user_id
						}
					}],
					changes: []
				};
				return this.RangesManager.applyUpdate(this.project_id, this.doc_id, this.entries, this.updates, this.newDocLines, this.callback);
			});
			
			return it("should return an error", function() {
				this.callback.called.should.equal(true);
				const [error, entries] = Array.from(this.callback.args[0]);
				expect(error).to.not.be.null;
				return expect(error.message).to.equal("too many comments or tracked changes");
			});
		});
		
		describe("with too many changes", function() {
			beforeEach(function() {
				this.RangesManager.MAX_CHANGES = 2;
				this.updates = [{
					meta: {
						user_id: this.user_id,
						tc: "track-changes-id-yes"
					},
					op: [{
						i: "one ",
						p: 0
					}]
				}];
				this.entries = {
					changes: [{
						op: {
							i: "three",
							p: 4
						},
						metadata: {
							user_id: this.user_id
						}
					}, {
						op: {
							i: "four",
							p: 10
						},
						metadata: {
							user_id: this.user_id
						}
					}],
					comments: []
				};
				this.newDocLines = ["one two three four"];
				return this.RangesManager.applyUpdate(this.project_id, this.doc_id, this.entries, this.updates, this.newDocLines, this.callback);
			});
			
			return it("should return an error", function() {
				// Save space in redis and don't store just {}
				this.callback.called.should.equal(true);
				const [error, entries] = Array.from(this.callback.args[0]);
				expect(error).to.not.be.null;
				return expect(error.message).to.equal("too many comments or tracked changes");
			});
		});
		
		describe("inconsistent changes", function() {
			beforeEach(function() {
				this.updates = [{
					meta: {
						user_id: this.user_id
					},
					op: [{
						c: "doesn't match",
						p: 0
					}]
				}];
				return this.RangesManager.applyUpdate(this.project_id, this.doc_id, this.entries, this.updates, this.newDocLines, this.callback);
			});
			
			return it("should return an error", function() {
				// Save space in redis and don't store just {}
				this.callback.called.should.equal(true);
				const [error, entries] = Array.from(this.callback.args[0]);
				expect(error).to.not.be.null;
				return expect(error.message).to.equal("Change ({\"op\":{\"i\":\"five\",\"p\":15},\"metadata\":{\"user_id\":\"user-id-123\"}}) doesn't match text (\"our \")");
			});
		});


		return describe("with an update that collapses a range", function() {
			beforeEach(function() {
				this.updates = [{
					meta: {
						user_id: this.user_id
					},
					op: [{
						d: "one",
						p: 0,
						t: "thread-id-1"
					}]
				}];
				this.entries = {
					comments: [{
						op: {
							c: "n",
							p: 1,
							t: "thread-id-2"
						},
						metadata: {
							user_id: this.user_id
						}
					}],
					changes: []
				};
				return this.RangesManager.applyUpdate(this.project_id, this.doc_id, this.entries, this.updates, this.newDocLines, this.callback);
			});

			return it("should return ranges_were_collapsed == true", function() {
				this.callback.called.should.equal(true);
				const [error, entries, ranges_were_collapsed] = Array.from(this.callback.args[0]);
				return expect(ranges_were_collapsed).to.equal(true);
			});
		});
	});

	return describe("acceptChanges", function() {
		beforeEach(function() {
			this.RangesManager = SandboxedModule.require(modulePath, {
				requires: {
					"logger-sharelatex": (this.logger = { error: sinon.stub(), log: sinon.stub(), warn: sinon.stub() }),
					"./RangesTracker":(this.RangesTracker = SandboxedModule.require("../../../../app/js/RangesTracker.js"))
				}
			}
			);

			this.ranges = {
				comments: [],
				changes: [{
					id: "a1",
					op: {
						i: "lorem",
						p: 0
					}
				}, {
					id: "a2",
					op: {
						i: "ipsum",
						p: 10
					}
				}, {
					id: "a3",
					op: {
						i: "dolor",
						p: 20
					}
				}, {
					id: "a4",
					op: {
						i: "sit",
						p: 30
					}
				}, {
					id: "a5",
					op: {
						i: "amet",
						p: 40
					}
				}]
			};
			return this.removeChangeIdsSpy = sinon.spy(this.RangesTracker.prototype, "removeChangeIds");
		});

		describe("successfully with a single change", function() {
			beforeEach(function(done) {
				this.change_ids = [ this.ranges.changes[1].id ];
				return this.RangesManager.acceptChanges(this.change_ids, this.ranges, (err, ranges) => { 
					this.rangesResponse = ranges;
					return done();
				});
			});

			it("should log the call with the correct number of changes", function() {
				return this.logger.log
					.calledWith("accepting 1 changes in ranges")
					.should.equal(true);
			});

			it("should delegate the change removal to the ranges tracker", function() {
				return this.removeChangeIdsSpy
					.calledWith(this.change_ids)
					.should.equal(true);
			});

			it("should remove the change", function() {
				return expect(this.rangesResponse.changes
					.find(change => change.id ===  this.ranges.changes[1].id))
					.to.be.undefined;
			});

			it("should return the original number of changes minus 1", function() {
				return this.rangesResponse.changes.length
					.should.equal(this.ranges.changes.length - 1);
			});
					
			return it("should not touch other changes", function() {
				return [ 0, 2, 3, 4].map((i) =>
					expect(this.rangesResponse.changes
						.find(change => change.id ===  this.ranges.changes[i].id))
						.to.deep.equal(this.ranges.changes[i]));
		});
	});

		return describe("successfully with multiple changes", function() {
			beforeEach(function(done) {
				this.change_ids = [ this.ranges.changes[1].id, this.ranges.changes[3].id, this.ranges.changes[4].id ];
				return this.RangesManager.acceptChanges(this.change_ids, this.ranges, (err, ranges) => { 
					this.rangesResponse = ranges;
					return done();
				});
			});

			it("should log the call with the correct number of changes", function() {
				return this.logger.log
					.calledWith(`accepting ${ this.change_ids.length } changes in ranges`)
					.should.equal(true);
			});

			it("should delegate the change removal to the ranges tracker", function() {
				return this.removeChangeIdsSpy
					.calledWith(this.change_ids)
					.should.equal(true);
			});

			it("should remove the changes", function() {
				return [ 1, 3, 4].map((i) =>
					expect(this.rangesResponse.changes
						.find(change => change.id ===  this.ranges.changes[1].id))
						.to.be.undefined);
			});
			
			it("should return the original number of changes minus the number of accepted changes", function() {
				return this.rangesResponse.changes.length
					.should.equal(this.ranges.changes.length - 3);
			});

			return it("should not touch other changes", function() {
				return [ 0, 2 ].map((i) =>
					expect(this.rangesResponse.changes
						.find(change => change.id ===  this.ranges.changes[i].id))
						.to.deep.equal(this.ranges.changes[i]));
		});
	});
});
});