/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const SandboxedModule = require('sandboxed-module');
const sinon = require('sinon');
require('chai').should();
const {
    expect
} = require('chai');
const modulePath = require('path').join(__dirname, '../../../app/js/RangeManager');
const {
    ObjectId
} = require("mongojs");
const {
    assert
} = require("chai");
const _ = require("underscore");

describe("RangeManager", function() {
	beforeEach(function() {
		return this.RangeManager = SandboxedModule.require(modulePath, { requires: {
			"./mongojs": {
				ObjectId
			}
		}
	}
		);
	});

	describe("jsonRangesToMongo", function() {
		it("should convert ObjectIds and dates to proper objects", function() {
			const change_id = ObjectId().toString();
			const comment_id = ObjectId().toString();
			const user_id = ObjectId().toString();
			const thread_id = ObjectId().toString();
			const ts = new Date().toJSON();
			return this.RangeManager.jsonRangesToMongo({
				changes: [{
					id: change_id,
					op: { i: "foo", p: 3 },
					metadata: {
						user_id,
						ts
					}
				}],
				comments: [{
					id: comment_id,
					op: { c: "foo", p: 3, t: thread_id }
				}]
			}).should.deep.equal({
				changes: [{
					id: ObjectId(change_id),
					op: { i: "foo", p: 3 },
					metadata: {
						user_id: ObjectId(user_id),
						ts: new Date(ts)
					}
				}],
				comments: [{
					id: ObjectId(comment_id),
					op: { c: "foo", p: 3, t: ObjectId(thread_id) }
				}]
			});
	});
		
		it("should leave malformed ObjectIds as they are", function() {
			const change_id = "foo";
			const comment_id = "bar";
			const user_id = "baz";
			return this.RangeManager.jsonRangesToMongo({
				changes: [{
					id: change_id,
					metadata: {
						user_id
					}
				}],
				comments: [{
					id: comment_id
				}]
			}).should.deep.equal({
				changes: [{
					id: change_id,
					metadata: {
						user_id
					}
				}],
				comments: [{
					id: comment_id
				}]
			});
	});
		
		return it("should be consistent when transformed through json -> mongo -> json", function() {
			const change_id = ObjectId().toString();
			const comment_id = ObjectId().toString();
			const user_id = ObjectId().toString();
			const thread_id = ObjectId().toString();
			const ts = new Date().toJSON();
			const ranges1 = {
				changes: [{
					id: change_id,
					op: { i: "foo", p: 3 },
					metadata: {
						user_id,
						ts
					}
				}],
				comments: [{
					id: comment_id,
					op: { c: "foo", p: 3, t: thread_id }
				}]
			};
			const ranges1_copy = JSON.parse(JSON.stringify(ranges1)); // jsonRangesToMongo modifies in place
			const ranges2 = JSON.parse(JSON.stringify(this.RangeManager.jsonRangesToMongo(ranges1_copy)));
			return ranges1.should.deep.equal(ranges2);
		});
	});
			
	return describe("shouldUpdateRanges", function() {
		beforeEach(function() {
			this.ranges = {
				changes: [{
					id: ObjectId(),
					op: { i: "foo", p: 3 },
					metadata: {
						user_id: ObjectId(),
						ts: new Date()
					}
				}],
				comments: [{
					id: ObjectId(),
					op: { c: "foo", p: 3, t: ObjectId() }
				}]
			};
			return this.ranges_copy = this.RangeManager.jsonRangesToMongo(JSON.parse(JSON.stringify(this.ranges)));
		});

		describe("with a blank new range", () => it("should throw an error", function() {
            return expect(() => {
                return this.RangeManager.shouldUpdateRanges(this.ranges, null);
            }).to.throw(Error);
        }));
		
		describe("with a blank old range", () => it("should treat it like {}", function() {
            this.RangeManager.shouldUpdateRanges(null, {}).should.equal(false);
            return this.RangeManager.shouldUpdateRanges(null, this.ranges).should.equal(true);
        }));
		
		describe("with no changes", () => it("should return false", function() {
            return this.RangeManager.shouldUpdateRanges(this.ranges, this.ranges_copy).should.equal(false);
        }));
		
		return describe("with changes", function() {
			it("should return true when the change id changes", function() {
				this.ranges_copy.changes[0].id = ObjectId();
				return this.RangeManager.shouldUpdateRanges(this.ranges, this.ranges_copy).should.equal(true);
			});

			it("should return true when the change user id changes", function() {
				this.ranges_copy.changes[0].metadata.user_id = ObjectId();
				return this.RangeManager.shouldUpdateRanges(this.ranges, this.ranges_copy).should.equal(true);
			});

			it("should return true when the change ts changes", function() {
				this.ranges_copy.changes[0].metadata.ts = new Date(Date.now() + 1000);
				return this.RangeManager.shouldUpdateRanges(this.ranges, this.ranges_copy).should.equal(true);
			});

			it("should return true when the change op changes", function() {
				this.ranges_copy.changes[0].op.i = "bar";
				return this.RangeManager.shouldUpdateRanges(this.ranges, this.ranges_copy).should.equal(true);
			});

			it("should return true when the comment id changes", function() {
				this.ranges_copy.comments[0].id = ObjectId();
				return this.RangeManager.shouldUpdateRanges(this.ranges, this.ranges_copy).should.equal(true);
			});

			it("should return true when the comment offset changes", function() {
				this.ranges_copy.comments[0].op.p = 17;
				return this.RangeManager.shouldUpdateRanges(this.ranges, this.ranges_copy).should.equal(true);
			});

			return it("should return true when the comment content changes", function() {
				this.ranges_copy.comments[0].op.c = "bar";
				return this.RangeManager.shouldUpdateRanges(this.ranges, this.ranges_copy).should.equal(true);
			});
		});
	});
});