/// <reference path="src/types.ts"/>

/* [MS-XLSB] 2.4.698 BrtMdtinfo */
interface BrtMdtinfo {
	flags: number;
	version: number;
	name: string;
}
function parse_BrtMdtinfo(data: ReadableData, length: number): BrtMdtinfo {
	return {
		flags: data.read_shift(4),
		version: data.read_shift(4),
		name: parse_XLWideString(data, length - 8)
	};
}
function write_BrtMdtinfo(data: BrtMdtinfo): RawData {
	var o = new_buf(12 + 2 * data.name.length);
	o.write_shift(4, data.flags);
	o.write_shift(4, data.version);
	write_XLWideString(data.name, o);
	return o.slice(0, o.l);
}

/* [MS-XLSB] 2.4.697 BrtMdb */
type Mdir = [number, number]; // "t", "v" in XLSX parlance
type BrtMdb = Mdir[];
function write_BrtMdb(mdb: BrtMdb): RawData {
	var o = new_buf(4 + 8 * mdb.length);
	o.write_shift(4, mdb.length);
	for(var i = 0; i < mdb.length; ++i) {
		o.write_shift(4, mdb[i][0]);
		o.write_shift(4, mdb[i][1]);
	}
	return o;
}

/* [MS-XLSB] 2.4.72 BrtBeginEsfmd */
function write_BrtBeginEsfmd(cnt: number, name: string): RawData {
	var o = new_buf(8 + 2 * name.length);
	o.write_shift(4, cnt);
	write_XLWideString(name, o);
	return o.slice(0, o.l);
}

/* [MS-XLSB] 2.4.73 BrtBeginEsmdb */
function write_BrtBeginEsmdb(cnt: number, cm: boolean): RawData {
	var o = new_buf(8);
	o.write_shift(4, cnt);
	o.write_shift(4, cm ? 1 : 0);
	return o;
}

/* [MS-XLSB] 2.1.7.34 Metadata */
function parse_xlmeta_bin(data, name: string, _opts?: ParseXLMetaOptions): XLMeta {
	var out: XLMeta = { Types: [] };
	var opts = _opts || {};
	var state: string[] = [];
	var pass = false;

	recordhopper(data, (val, R_n, RT) => {
		switch(RT) {
			// case 0x014C: /* 'BrtBeginMetadata' */
			// case 0x014D: /* 'BrtEndMetadata' */
			// case 0x014E: /* 'BrtBeginEsmdtinfo' */
			// case 0x0150: /* 'BrtEndEsmdtinfo' */
			// case 0x0151: /* 'BrtBeginEsmdb' */
			// case 0x0152: /* 'BrtEndEsmdb' */
			// case 0x0153: /* 'BrtBeginEsfmd' */
			// case 0x0154: /* 'BrtEndEsfmd' */
			// case 0x0034: /* 'BrtBeginFmd' */
			// case 0x0035: /* 'BrtEndFmd' */
			// case 0x1000: /* 'BrtBeginDynamicArrayPr' */
			// case 0x1001: /* 'BrtEndDynamicArrayPr' */
			// case 0x138A: /* 'BrtBeginRichValueBlock' */
			// case 0x138B: /* 'BrtEndRichValueBlock' */

			case 0x014F: /* 'BrtMdtinfo' */
				out.Types.push({name: (val as BrtMdtinfo).name});
				break;
			case 0x0033: /* 'BrtMdb' */
				break;

			case 0x0023: /* 'BrtFRTBegin' */
				state.push(R_n); pass = true; break;
			case 0x0024: /* 'BrtFRTEnd' */
				state.pop(); pass = false; break;
			default:
				if((R_n||"").indexOf("Begin") > 0){/* empty */}
				else if((R_n||"").indexOf("End") > 0){/* empty */}
				else if(!pass || (opts.WTF && state[state.length-1] != "BrtFRTBegin")) throw new Error("Unexpected record " + RT + " " + R_n);
		}
	});
	return out;
}
function write_xlmeta_bin() {
	var ba = buf_array();
	write_record(ba, "BrtBeginMetadata");
	write_record(ba, "BrtBeginEsmdtinfo", write_UInt32LE(1));
	write_record(ba, "BrtMdtinfo", write_BrtMdtinfo({
		name: "XLDAPR",
		version: 120000,
		flags: 0xD06AC0B0
	}));
	write_record(ba, "BrtEndEsmdtinfo");
	/* [ESSTR] [ESMDX] */
	write_record(ba, "BrtBeginEsfmd", write_BrtBeginEsfmd(1, "XLDAPR"));
	write_record(ba, "BrtBeginFmd");
	write_record(ba, "BrtFRTBegin", write_UInt32LE(0x0202));
	write_record(ba, "BrtBeginDynamicArrayPr", write_UInt32LE(0));
	write_record(ba, "BrtEndDynamicArrayPr", writeuint16(1));
	write_record(ba, "BrtFRTEnd");
	write_record(ba, "BrtEndFmd");
	write_record(ba, "BrtEndEsfmd");
	write_record(ba, "BrtBeginEsmdb", write_BrtBeginEsmdb(1, true));
	write_record(ba, "BrtMdb", write_BrtMdb([[1, 0]]));
	write_record(ba, "BrtEndEsmdb");
	/* *FRT */
	write_record(ba, "BrtEndMetadata");
	return ba.end();
}