import test from "ava";
import {Calendar} from "../../src/lib/calendar-v2.js";

test("Calendar: first day of week start as defined", t =>{
	let firstDayOfWeek = 1;
	Calendar.firstDayOfWeek = firstDayOfWeek;
	let cal = Calendar.buildCalendar(1, 1970);
	let expectedWeekDays = [1, 2, 3, 4, 5, 6, 0];
	t.deepEqual(cal.weekDays, expectedWeekDays);
	t.is(firstDayOfWeek, Calendar.firstDayOfWeek);
});

test("Calendar: first week contains correct number of spaces", t =>{
	console.log("Calendar: first week contains correct number of spaces");
	let firstDayOfWeek = 1;
	Calendar.firstDayOfWeek = firstDayOfWeek;
	let cal = Calendar.buildCalendar(1, 1970);
	let firstWeek = cal.weeks[0];
	let expectedFirstWeek = ['', '', '', 1, 2, 3, 4];
	t.deepEqual(firstWeek, expectedFirstWeek);
});

test("Calendar: Test Jan. 2021, America Format", t=>{
	Calendar.firstDayOfWeek = 0;

	let cal = Calendar.buildCalendar(1, 2021);
	let expectedCal = {
		month: 1,
		year: 2021,
		weekDays: [0, 1, 2, 3, 4, 5, 6],
		weeks: [
			['', '', '', '','',   1,  2],
			[ 3,  4,  5, 6,   7,  8,  9],
			[10, 11, 12, 13, 14, 15, 16],
			[17, 18, 19, 20, 21, 22, 23],
			[24, 25, 26, 27, 28, 29, 30],
			[31]
		]
	};
	t.deepEqual(cal, expectedCal);
});

test("Calendar: buildCalendar.apply() is a valid call", t=>{
	Calendar.firstDayOfWeek = 0;

	let cal = Calendar.buildCalendar.apply(undefined, [1, 2021]);
	let expectedCal = {
		month: 1,
		year: 2021,
		weekDays: [0, 1, 2, 3, 4, 5, 6],
		weeks: [
			['', '', '', '','',   1,  2],
			[ 3,  4,  5, 6,   7,  8,  9],
			[10, 11, 12, 13, 14, 15, 16],
			[17, 18, 19, 20, 21, 22, 23],
			[24, 25, 26, 27, 28, 29, 30],
			[31]
		]
	};
	t.deepEqual(cal, expectedCal);
});

test("Calendar: buildCalendar.call() is a valid call", t=>{
	Calendar.firstDayOfWeek = 0;

	let cal = Calendar.buildCalendar.call(undefined, 1, 2021);
	let expectedCal = {
		month: 1,
		year: 2021,
		weekDays: [0, 1, 2, 3, 4, 5, 6],
		weeks: [
			['', '', '', '','',   1,  2],
			[ 3,  4,  5, 6,   7,  8,  9],
			[10, 11, 12, 13, 14, 15, 16],
			[17, 18, 19, 20, 21, 22, 23],
			[24, 25, 26, 27, 28, 29, 30],
			[31]
		]
	};
	t.deepEqual(cal, expectedCal);
});


test("Calendar: first day is a Sunday, months start with Monday", t => {
	Calendar.firstDayOfWeek = 1;
	let cal = Calendar.buildCalendar(5, 2022);
	let expectedCal = {
		month:5,
		year:2022,
		weekDays:[1,2,3,4,5,6,0],
		weeks:[
			["","","","","","", 1],
			[ 2, 3, 4, 5, 6, 7, 8],
			[ 9,10,11,12,13,14,15],
			[16,17,18,19,20,21,22],
			[23,24,25,26,27,28,29],
			[30,31]
		]
	};
	t.deepEqual(cal, expectedCal);
});

test("Calendar: do not append empty week", t=>{
	Calendar.firstDayOfWeek = 1;
	let cal = Calendar.buildCalendar(10, 2021);
	let expectedCal = {
		month: 10,
		year: 2021,
		weekDays:[1,2,3,4,5,6,0],
		weeks:[
			["","","","", 1, 2, 3],
			[ 4, 5, 6, 7, 8, 9,10],
			[11,12,13,14,15,16,17],
			[18,19,20,21,22,23,24],
			[25,26,27,28,29,30,31]/*next week will be empty, so do not append it*/
		]
	};
	t.deepEqual(cal, expectedCal);
});