/*  OpenTally: Open-source election vote counting
 *  Copyright © 2021 Lee Yingtong Li (RunasSudo)
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

function clickAdvancedOptions() {
	if (document.getElementById('divAdvancedOptions').style.display === 'none') {
		document.getElementById('divAdvancedOptions').style.display = 'grid';
		document.getElementById('btnAdvancedOptions').innerHTML = 'Hide advanced options';
	} else {
		document.getElementById('divAdvancedOptions').style.display = 'none';
		document.getElementById('btnAdvancedOptions').innerHTML = 'Show advanced options';
	}
}

var wasm = wasm_bindgen;

var tblResult = document.getElementById('result');
var divLogs2 = document.getElementById('resultLogs2');
var olStageComments;

function updateResultTable(result) {
	for (let i = 0; i < result.length; i++) {
		tblResult.rows[i].insertAdjacentHTML('beforeend', result[i]);
	}
}

function updateStageComments(comment) {
	let elLi = document.createElement('li');
	elLi.innerHTML = comment;
	olStageComments.append(elLi);
}

async function clickCount() {
	if (document.getElementById('bltFile').files.length === 0) {
		return;
	}
	
	// Read BLT file
	let bltFile = document.getElementById('bltFile').files[0];
	let electionData = await bltFile.text();
	
	// Load WASM
	await wasm_bindgen('opentally_bg.wasm');
	
	// Init election
	let election = wasm.election_from_blt_Rational(electionData);
	
	// Init results table
	tblResult.innerHTML = wasm.init_results_table_Rational(election);
	
	divLogs2.innerHTML = '<p>Stage comments:</p>';
	olStageComments = document.createElement('ol');
	divLogs2.append(olStageComments);
	
	// Init STV options
	let opts = wasm.STVOptions.new(
		document.getElementById('chkRoundTVs').checked ? parseInt(document.getElementById('txtRoundTVs').value) : null,
		document.getElementById('chkRoundWeights').checked ? parseInt(document.getElementById('txtRoundWeights').value) : null,
		document.getElementById('chkRoundVotes').checked ? parseInt(document.getElementById('txtRoundVotes').value) : null,
		document.getElementById('chkRoundQuota').checked ? parseInt(document.getElementById('txtRoundQuota').value) : null,
		document.getElementById('selQuota').value,
		document.getElementById('selQuotaCriterion').value,
		document.getElementById('selTransfers').value,
		document.getElementById('selSurplus').value,
		document.getElementById('selPapers').value == 'transferable',
		document.getElementById('selExclusion').value,
		parseInt(document.getElementById('txtPPDP').value),
	);
	
	// Describe count
	let filePath = document.getElementById('bltFile').value;
	filePath = filePath.substring(Math.max(filePath.lastIndexOf('\\'), filePath.lastIndexOf('/')) + 1);
	document.getElementById('resultLogs1').innerHTML = wasm.describe_count_Rational(filePath, election, opts);
	
	// Step election
	let state = wasm.CountStateRational.new(election);
	wasm.count_init_Rational(state, opts);
	updateResultTable(wasm.update_results_table_Rational(1, state, opts));
	updateStageComments(wasm.update_stage_comments_Rational(state));
	
	for (let stageNum = 2;; stageNum++) {
		let isDone = wasm.count_one_stage_Rational(state, opts);
		if (isDone) {
			break;
		}
		updateResultTable(wasm.update_results_table_Rational(stageNum, state, opts));
		updateStageComments(wasm.update_stage_comments_Rational(state));
	}
	
	updateResultTable(wasm.finalise_results_table_Rational(state));
	
	divLogs2.insertAdjacentHTML('beforeend', wasm.final_result_summary_Rational(state));
}