import { RollStats } from "./rollstats"
import { Outcomes } from "./asphodice"
import palette from "google-palette"
import { Chart } from "chart.js"
import "bootstrap";

// TODO: more descriptive name
interface ResultPropertyOptions {
	rollstats: RollStats,
	diceClass: string,
	diceVariant: string,
	numDice: number,
}

/**
 * Provide properties for displaying roll results
 *
 *  - rollstats is an instance of a RollStatsClass
 *  - diceClass is the shortname of a dice class (eg "aphodice")
 *  - diceVariant is a string/number combo to disambiguate (eg "c8" for successCutOff = 8)
 *  - numDice is the number of dice being rolled at a particular time (eg 4; NB negative numbers indicate randomised dice number though not used at present)
 *
 */
class ResultProperties {
	rollstats: RollStats;
	diceClass: string;
	diceVariant: string;
	numDice: number;

	constructor(rpOptions: ResultPropertyOptions) {
		this.rollstats = rpOptions.rollstats;
		this.diceClass = rpOptions.diceClass;
		this.diceVariant = rpOptions.diceVariant;
		this.numDice = rpOptions.numDice;
	}

	/**
	 * Provide unique itemId for use in DOM elements, eg "asphodice-c6-d4"
	 * for use in, say: <canvas id="balanceCounts-asphodice-c6-d4"></canvas>
	 */
	itemId(): string {
		return `${this.diceClass}-${this.diceVariant}-${this.numDice}`;
	}

	/**
	 * Provide 'variant class', intended use is for result card visibility group toggling
	 */
	variantClass(): string {
		return `${this.diceClass}-${this.diceVariant}`;
	}
}

let barChartOptions = { scales: {
				yAxes: [{
					ticks: {
						beginAtZero: true,
					}
				}]
			},
			legend: {
				display: false,
			}
}

function hexColours(numColours: number): Array<string> {
	return palette(["cb-Set1", "tol-dv"], numColours).map( function (hex: string) {
		return `#${String(hex)}`; })
}
/**
 * Make a table with headings
 *
 * TODO: boolean for striped
 */
function makeTableSkeleton(tableId: string, headings: Array<string>) {
	let output = `<table id="${tableId}" class="table table-striped">
	<thead>`;
	for (let head of headings) {
		output += `<th>${head}</th>`;
	}
	output += "</thead><tbody></tbody></table>";
	return output;
}

/**
 * Remap true to "rerolled" and false to "Not rerolled"
 */
function mapRerolledKeys(Keys: Array<string>): Array<string> {
	return Keys.map((k) => {return (k == "true") ? "Rerolled" : "Not Rerolled"});
}

function buildData(): string {
	let output = "";
	return output;
}

function buildCharts(): string {
	let output = "";
	return output;
}

/**
 * h2 wrapper
 */
function bigTitle(text:string): string {
	return `<h2 class="card-title">${text}</h2>`;
}

/**
 * h3 wrapper
 */
function subTitle(text:string): string {
	return `<h3 class="card-subtitle my-1">${text}</h3>`;
}

/**
 * h4 wrapper
 */
function subsubTitle(text:string): string {
	return `<h4 class="card-subtitle my-1">${text}</h4>`;
}

/**
 * Report on rerolls
 * ie:
 *  - make chart
 *  - make number boxes
 */

function rerollReport(resultProperties: ResultProperties): string {
	// TODO: this mixes structure and content, probably a good idea to separate it out
	let rerollsChartId = `rerollsChart-${resultProperties.itemId()}`;
	// Column structure
	let output = `<div class="col" id="rerollCol">`;
	// Heading
	output += subTitle("Rerolls");
	// Preamble (ie it looks super confusing)
	//output += "<p>This is super confusing because the colours are swapped on the legend and the chart, then the data below swaps back.</p>";
	// Chart
	output += `<canvas id="${rerollsChartId}"></canvas>`

	// Numbers

	output += `<div class="row my-3 mx-auto">`;
	output += `<div class="col alert alert-success">
			<strong>Rerolled:</strong>
			${resultProperties.rollstats.rerollCounts.true}
			(${(resultProperties.rollstats.rerollCounts.true / resultProperties.rollstats.numRolls * 100).toFixed(2)} %)
			</div>`;
	output += `<div class="col alert alert-warning">
			<strong>Not rerolled:</strong>
			${resultProperties.rollstats.rerollCounts.false}
			(${(resultProperties.rollstats.rerollCounts.false / resultProperties.rollstats.numRolls * 100).toFixed(2)} %)
			</div>`
	output += `</div>`
	output += `</div>`
	return output;
}

function outcomesReport(resultProperties: ResultProperties): string {
	let outcomesChartId = `outcomesChart-${resultProperties.itemId()}`;
	let outcomesTableId = `outcomesTable-${resultProperties.itemId()}`;
	// Column structure
	let output = `<div class="col" id="outcomesCol">`;
	// Heading
	output += subTitle("Outcomes");
	// Preamble

	// Chart
	output += `<canvas id="${outcomesChartId}"></canvas>`;

	// Table
	output += makeTableSkeleton(outcomesTableId, ["Outcome", "Count", "Percentage"]);

	output += `</div>`;
	return output;
}

function outcomeBalancesReport(resultProperties: ResultProperties): string {
	let balanceChartId = `balanceChart-${resultProperties.itemId()}`;
	let balanceTableId = `balanceTable-${resultProperties.itemId()}`;
	// Column structure
	let output = `<div class="col" id="balancesCol">`;
	// Heading
	output += subTitle("Outcome Balances");
	// Preamble

	// Chart
	output += `<canvas id="${balanceChartId}"></canvas>`;

	// Table
	output += makeTableSkeleton(balanceTableId, ["Balance", "Count", "Percentage"]);
	output += `</div>`;
	return output;
}

/**
 * Do the charts after we've added them to the canvas
 *
 * The more javascripty way of doing this would be a callback or a custom event (TODO?)
 */
function generateCharts(resultProperties: ResultProperties): void {
	let itemId = resultProperties.itemId();
	let rerollsChartId = `rerollsChart-${itemId}`;
	let outcomesChartId = `outcomesChart-${itemId}`;
	let balanceChartId = `balanceChart-${itemId}`;

	/*
	 * Rerolls
	 */

	let rerollsCanvas: any = $(`#${rerollsChartId}`);
	let rerollsChart = new Chart(rerollsCanvas, {
		type: "doughnut",
		data: {
			labels: mapRerolledKeys(Object.keys(resultProperties.rollstats.rerollCounts)),
			datasets: [{
				label: "Reroll Counts",
				data: Object.values(resultProperties.rollstats.rerollCounts),
				backgroundColor: ["#d1e7dd", "#fff3cd"],
				//backgroundColor: hexColours(Object.values(rollstats.balanceCounts).length),
			}],
		},
		options: {
			title: {
				text: "Rerolls Chart",
				display: false,
			},
			legend: {
				reverse: true,
			}
		}
	});

	/*
	 * Outcomes
	 */

	// sort so we have failure before success
	let oc = resultProperties.rollstats.outcomeCounts;
	let okeys = Object.keys(oc).sort();
	let ovalues = [];
	for (let i = 0; i < okeys.length; i++) {
		ovalues.push(oc[okeys[i] as Outcomes]);
	}

	let outcomesCanvas: any = $(`#${outcomesChartId}`);
	let outcomesChart = new Chart(outcomesCanvas, {
		type: "bar",
		data: {
			labels: okeys,
			datasets: [{
				label: "Outcome Counts",
				data: ovalues,
				backgroundColor: hexColours(Object.values(resultProperties.rollstats.outcomeCounts).length),
			}],
		},
		options: barChartOptions,
	});

	/**
	 * Outcome Balances
	 */

	let bc = resultProperties.rollstats.balanceCounts;
	let keys = Object.keys(bc);
	keys.sort(function(a: string, b: string){return Number(a) - Number(b)});
	// sort values too
	let values = [];
	for (let i = 0; i < keys.length; i++) {
		values.push(bc[keys[i]]);
	}

	let balanceCanvas: any = $(`#${balanceChartId}`);
	let balanceChart = new Chart(balanceCanvas, {
		type: "bar",
		data: {
			labels: keys,
			datasets: [{
				label: "Outcome Balance Counts",
				data: values,
				backgroundColor: hexColours(Object.values(resultProperties.rollstats.balanceCounts).length),
			}],
		},
		options: barChartOptions,
	});

}

/**
 * Generate tables after we've inserted them into the DOM,
 *
 * Also should be callback/event-driven. (TODO?)
 */
function generateTables(resultProperties: ResultProperties): void {
	let itemId = resultProperties.itemId();
	/*
	 * Outcomes
	 */
	let outcomesTableId = `outcomesTable-${itemId}`;

	let oc = resultProperties.rollstats.outcomeCounts;
	let okeys = Object.keys(oc).sort();
	for (var i = 0; i < okeys.length; i++) {
		let tb = $(`#${outcomesTableId}`).find("tbody");
		let outcome: Outcomes = okeys[i] as Outcomes;
		let outcomeCount = resultProperties.rollstats.outcomeCounts[outcome];
		let outcomePercent: string = "";
		if (outcomeCount) {
			// Needed to avoid TS2532:
			outcomePercent = (outcomeCount / resultProperties.rollstats.numRolls * 100).toFixed(2);
		}
		tb.append(`<tr> <td>${outcome}</td>
			  <td>${outcomeCount}</td>
			  <td>${outcomePercent}</td>
			  </tr>`);
	}

	/*
	 * Outcome Balance Counts
	 */
	let balanceTableId = `balanceTable-${itemId}`;

	let bc = resultProperties.rollstats.balanceCounts;
	let keys = Object.keys(bc);
	keys.sort(function(a: string, b: string){return Number(a) - Number(b)});
	for (var i = 0; i < keys.length; i++) {
		let tb = $(`#${balanceTableId}`).find("tbody");
		tb.append(`<tr>	<td>${keys[i]}</td>
				<td>${resultProperties.rollstats.balanceCounts[keys[i]]}</td>
				<td>${(resultProperties.rollstats.balanceCounts[keys[i]] / resultProperties.rollstats.numRolls * 100).toFixed(2)}</td>
			</tr>`);
	}

}

/**
 * For pretty-printing. See https://stackoverflow.com/a/2901298
 */
function numberWithCommas(x:number): string {
	return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}

/**
 * Give some info on the dice used to generate these results
 */

function describeRolls(resultsProperties: ResultProperties): string {
	let output = subTitle("Description");
	output += `<p>There were <strong>${resultsProperties.numDice}</strong> Asphodice rolled <strong>${numberWithCommas(resultsProperties.rollstats.numRolls)}</strong> times.</p>`;
	return output;
}

/**
 * Set up results card that contains one set of RollStats results
 */
function resultsCard(resultsProperties: ResultProperties): JQuery<HTMLElement>{
	// <div id="results"> is the general results div to append results to
	// TODO: include class shortname in id (?)
	let cardId = `results-${resultsProperties.itemId()}`;

	$("#results").append(`<div class="card my-4" id="${cardId}">`);
	let resultsCard = $("#results").find(`#${cardId}`);
	resultsCard.append(`<div class="card-body">`);
	let resultsCardBody: JQuery<HTMLElement> = $(`#${cardId}`).find("div.card-body");
	return resultsCardBody;
}

/**
 * Set up results 'header' - class name (TODO) and number of dice rolled
 */

function resultsHeader(resultProperties: ResultProperties): string {
	// Use flexbox (d-flex) for LHS/RHS justification
	let resultsBodyId = `resultsBody-${resultProperties.itemId()}`;
	let resultsTitle = `<div class="d-flex justify-content-between">`
	resultsTitle += `<div>`
			+ bigTitle(`Asphodice Results
					<small class="h4 text-muted">
						(<var>d=${resultProperties.numDice}</var>,
						 <var>${resultProperties.diceVariant}</var>)
					</small>`)
			+ `</div>`;
	resultsTitle += `<div>
			<button type="button" class="btn btn-primary btn-sm" data-bs-toggle="collapse"
			data-bs-target="#${resultsBodyId}"
			aria-expanded="true" aria-controls="collapse-resultsBody">
				(hide/show)
			</button>
			</div>`
	resultsTitle += `</div>`;
	return resultsTitle;
}

/**
 * Write out results 'body'. Set up in columns, the 'skeletons' of charts and tables are set up first,
 * to be filled in afterwards
 */

function resultsBody(resultProperties: ResultProperties): string {
	let resultsBodyId = `resultsBody-${resultProperties.itemId()}`;
	let resultsBody = `<div id="${resultsBodyId}" class="show row resultsToggle ${resultProperties.variantClass()}">`;
	resultsBody += describeRolls(resultProperties);
	resultsBody += rerollReport(resultProperties)
			+ outcomesReport(resultProperties)
			+ outcomeBalancesReport(resultProperties);
	resultsBody += `</div>`;
	return resultsBody;
}

/**
 * Put the results together - card, head, body → fill charts and tables
 */
function addResults(resultProperties: ResultProperties): void {
	let resultsCardBody = resultsCard(resultProperties);

	resultsCardBody.append(resultsHeader(resultProperties));

	resultsCardBody.append(resultsBody(resultProperties));

	// Post-DOM-Construction generation
	//
	// For tables: we need this as the way that tables were implemented
	// we .find() the <tbody>
	//
	// For charts: the Chart() generation function expects to passed an extant
	// <canvas> element

	// Tables
	generateTables(resultProperties);

	// Charts
	generateCharts(resultProperties);
}

/**
 * Card with status and hide-show all control
 */
function resultsControlCard(): string {
	let resultsControl = `<div id="resultsControl" class="card my-3 mx-2 border border-2 border-info">`;
	resultsControl += `<h2 class="card-title mx-3 my-2">Results</h5>`;

	resultsControl += `<div class="progress mx-3">
				<div class="progress-bar" id="resultsProgress"></div>
				</div>`;

	resultsControl += `<div class="card-body">
				<button class="btn btn-primary" type="button"
				data-bs-toggle="collapse" data-bs-target=".resultsToggle"
				aria-expanded="true" aria-controls="resultsToggleAll">
					Hide / Show All
				</button>
				</div>`;

	resultsControl += `</div>`;
	return resultsControl
}

/**
 * Add control to show/hide all of particular variant to control Card
 */
function addVariantControl(controlCard: JQuery<HTMLElement>,
			   resultProperties: ResultProperties): void {
	let variantClass = resultProperties.variantClass();
	controlCard.append(`<button id="variantButton-${variantClass}"
			   class="btn btn-primary" type="button"
			   data-bs-toggle="collapse" data-bs-target=".${variantClass}"
			   aria-expanded="true" aria-controls="resultsToggleVariant">
				Hide / Show Variant (${resultProperties.diceVariant})
			   </button>
			   `);
}

function getResults():void {
	// Disable 'roll' button
	$("#mainRoll").prop("disabled", true);
	console.log("Getting results...");

	$("#results").empty();

	$("#results").append(resultsControlCard);
	let controlCardBody = $("#results").find("#resultsControl .card-body");


	let maxDice = 10;
	let cutoffStart = 6;
	let cutoffMax = 9;
	for (let cutoff = cutoffStart; cutoff <= cutoffMax; cutoff++) {
		let variantControlAdded = false;
		for (let i = 1; i < maxDice; i++) {
			let rsSetup = { numDice: i, diceOptions: { successCutOff: cutoff } };
			let rollstats = new RollStats(rsSetup);
			let resultProperties = new ResultProperties({
				rollstats: rollstats,
				diceClass: "asphodice",
				diceVariant: `c${cutoff}`,
				numDice: i,
			});
			rollstats.doRolls();
			addResults(resultProperties);
			// Add control for variant if it doesn't exist
			if (!variantControlAdded) {
				addVariantControl(controlCardBody, resultProperties);
				variantControlAdded = true;
			}
			$("#resultsProgress").width(`${i/maxDice*100}%`);
			$("#resultsProgress").text(`${i/maxDice*100}%`);
		}
	}
	console.log("Results done!");
	$("#resultsProgress").width("100%");
	$("#resultsProgress").text("100%");
}


function setupHandlers(): void {
	$("#mainRoll").click(getResults);
}

document.addEventListener("DOMContentLoaded", setupHandlers);