/* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */
/* vim: set ts=2: */
/*jshint mocha:true */
/*global process, require */
/*::
declare type EmptyFunc = (() => void) | null;
declare type DescribeIt = { (desc:string, test:EmptyFunc):void; skip(desc:string, test:EmptyFunc):void; };
declare var describe : DescribeIt;
declare var it: DescribeIt;
declare var before:(test:EmptyFunc)=>void;
*/
var CFB;
var fs = require('fs');
describe('source', function() { it('should load', function() { CFB = require('./'); }); });
var CRC32 = require('crc-32');

var ex = [".xls",".doc",".ppt"];
if(process.env.FMTS) ex=process.env.FMTS.split(":").map(function(x){return x[0]==="."?x:"."+x;});
if(process.env.FMTS === "full") process.env.FMTS = ex.join(":");
if(process.env.FMTS) ex=process.env.FMTS.split(":").map(function(x){return x[0]==="."?x:"."+x;});

var ffunc = function(x){return (ex.indexOf(x.substr(-4))>=0 || ex.indexOf(x.substr(-3))>=0) && fails.indexOf(x) === -1;};
var fails = fs.existsSync('./fails.lst') ? fs.readFileSync('./fails.lst', 'utf-8').split("\n") : [];
var files = fs.readdirSync('test_files').filter(ffunc);
var f2011 = fs.readdirSync('test_files/2011').filter(ffunc);
var f2013 = fs.readdirSync('test_files/2013').filter(ffunc);
var fpres = fs.readdirSync('test_files_pres').filter(ffunc);

var dir = "./test_files/";
var TYPE = "buffer";

var names = [
	["!DocumentSummaryInformation", "\u0005"],
	["!SummaryInformation", "\u0005"],
	["!CompObj", "\u0001"],
	["!DataSpaces", "\u0006"],
	["!DRMContent", "\u0009"],
	["!DRMViewerContent", "\u0009"],
	["!Ole", "\u0001"]
].map(function(x) { return [x[0], x[0].replace("!", x[1])]; });

function parsetest(x, cfb) {
	describe(x + ' should have basic parts', function() {
		it('should find relative path', function() {
			switch(x.substr(-4)) {
				case '.xls': if(!CFB.find(cfb, 'Workbook') && !CFB.find(cfb, 'Book')) throw new Error("Cannot find workbook for " + x); break;
				case '.ppt': if(!CFB.find(cfb, 'PowerPoint Document')) throw new Error("Cannot find presentation for " + x); break;
				case '.doc': if(!CFB.find(cfb, 'WordDocument') && !CFB.find(cfb, 'Word Document')) throw new Error("Cannot find doc for " + x); break;
			}
		});
		it('should find absolute path', function() {
			switch(x.substr(-4)) {
				case '.xls': if(!CFB.find(cfb, '/Workbook') && !CFB.find(cfb, '/Book')) throw new Error("Cannot find workbook for " + x); break;
				case '.ppt': if(!CFB.find(cfb, '/PowerPoint Document')) throw new Error("Cannot find presentation for " + x); break;
				case '.doc': if(!CFB.find(cfb, '/WordDocument') && !CFB.find(cfb, '/Word Document')) throw new Error("Cannot find doc for " + x); break;
			}
		});
		it('should handle "!" aliases', function() {
			names.forEach(function(n) { if(CFB.find(cfb,n[0]) != CFB.find(cfb,n[1])) throw new Error("Bad name: " + n.join(" != ")); });
		});
	});
	describe(x + ' should roundtrip', function() {
		var data, newcfb;
		it('should roundtrip safely', function() {
			data = CFB.write(cfb, {type:TYPE});
			newcfb = CFB.read(data, {type:TYPE});
		});
		it('should preserve content', function() {
			var _old, _new;
			switch(x.substr(-4)) {
				case '.xls':
					_old = CFB.find(cfb, '/Workbook') || CFB.find(cfb, '/Book');
					_new = CFB.find(newcfb, '/Workbook') || CFB.find(newcfb, '/Book');
					break;
				case '.ppt':
					_old = CFB.find(cfb, '/PowerPoint Document');
					_new = CFB.find(newcfb, '/PowerPoint Document');
					break;
				case '.doc':
					_old = CFB.find(cfb, '/WordDocument') || CFB.find(cfb, '/Word Document');
					_new = CFB.find(newcfb, '/WordDocument') || CFB.find(newcfb, '/Word Document');
					break;
			}
			/*:: if(!_old || !_new) throw "unreachable"; */
			if(CRC32.buf(_old.content) != CRC32.buf(_new.content)) throw new Error(x + " failed roundtrip test");
		});
		it('should be idempotent', function() {
			var dat2 = CFB.write(newcfb, {type:TYPE});
			if(CRC32.buf(data) != CRC32.buf(dat2)) throw new Error(x + " failed idempotent test");
		});
	});
}

describe('should parse test files', function() {
	files.forEach(function(x) {
		it('should parse ' + x, function() {
			var cfb = CFB.read('./test_files/' + x, {type: "file"});
			parsetest(x, cfb);
		});
	});
	fpres.forEach(function(x) {
		it('should parse ' + x, function() {
			var cfb = CFB.read('./test_files_pres/' + x, {type: "file"});
			parsetest(x, cfb);
		});
	});
	f2011.forEach(function(x) {
		it('should parse ' + x, function() {
			var cfb = CFB.read('./test_files/2011/' + x, {type: "file"});
			parsetest(x, cfb);
		});
	});
	f2013.forEach(function(x) {
		it('should parse ' + x, function() {
			var cfb = CFB.read('./test_files/2013/' + x, {type: "file"});
			parsetest(x, cfb);
		});
	});
});

var cp = 'custom_properties.xls';

describe('input formats', function() {
	it('should read binary strings', function() {
		CFB.read(fs.readFileSync(dir + '/' + cp, 'binary'), {type: 'binary'});
	});
	it('should read base64 strings', function() {
		CFB.read(fs.readFileSync(dir + '/' + cp, 'base64'), {type: 'base64'});
	});
	it('should read buffers', function() {
		CFB.read(fs.readFileSync(dir + '/' + cp), {type: 'buffer'});
	});
});