import {cachedFetchJSON} from './cache';

const BUY = new Set([
	// definitely buy
	'C', 'FLX', 'H', 'H2O', 'HAL', 'HCP', 'HE', 'LST', 'MG', 'N', 'NA', 'NCS', 'NS', 'O', 'PE', 'PG', 'S', 'TCL', 'THF',
	// maybe buy
	'AIR', 'AU', 'BE', 'BRM', 'CU', 'FAN', 'FC', 'FE', 'HCC', 'HD', 'LDI', 'LI', 'MFK', 'MWF', 'REA', 'RG', 'RGO', 'ROM', 'SFK', 'SI', 'STL', 'TI', 'TPU',
	// import
	'AAR', 'AWF', 'CAP', 'CF',
	// skip
	'LFE', 'LHP', 'MFE', 'SFE', 'SSC',
])

const blueprint = {
	'FFC': 1,
	'FSE': 1,
	'LFE': 2,
	'MFE': 2,
	'RCT': 1,
	'SFE': 1,
	'LCB': 1,
	'MFL': 1,
	'MSL': 1,
	'LHP': 94,
	'SSC': 128,
	'BR1': 1,
	'CQM': 1,
}

const shipbuilders = [
	'CraftsmanThirteen',
	'EvoV',
	'SurvivorBob',
	'TRUEnterprises',
];

render();

async function render() {
	const main = document.querySelector('main.shipbuilding');
	if (!main)
		throw new Error('missing shipbuilding container');
	main.innerHTML = '<p>Loading...</p>';

	const [allPrices, recipes, buildings, knownCompanies, companyProductionById] = await Promise.all([
		cachedFetchJSON('https://refined-prun.github.io/refined-prices/all.json') as Promise<RawPrice[]>,
		recipeForMats(),
		cachedFetchJSON('https://api.prunplanner.org/data/buildings/') as Promise<Building[]>,
		cachedFetchJSON('https://pmmg-products.github.io/reports/data/knownCompanies.json') as Promise<Record<string, {Username: string}>>,
		pmmgMonthlyReport(),
	]);
	const prices = Object.fromEntries(allPrices.filter((price) => price.ExchangeCode === 'IC1')
			.map((price) => [price.MaterialTicker, price]));

	const production: Production = {};
	const buy: Record<string, number> = {};
	const analysisNodes: AnalysisNode[] = [];
	let cost = 0;
	for (const [mat, amount] of Object.entries(blueprint)) {
		const { cost: matCost, node } = analyzeMat(mat, amount, production, buy, prices, recipes);
		cost += matCost;
		analysisNodes.push(node);
	}

	// requiredMats = buy + production
	const requiredMats: Record<string, number> = {...buy};
	for (const buildingProduction of Object.values(production))
		for (const [mat, amount] of Object.entries(buildingProduction))
			requiredMats[mat] = (requiredMats[mat] ?? 0) + amount;

	const expertiseGroups: Record<string, string[]> = {};
	for (const building of buildings) {
		if (!(building.building_ticker in production))
			continue;
		if (!expertiseGroups[building.expertise])
			expertiseGroups[building.expertise] = [];
		expertiseGroups[building.expertise].push(building.building_ticker);
	}

	main.innerHTML = '';
	main.append(
		renderAnalysis(analysisNodes),
		element('p', {textContent: `total cost: ${formatWhole(cost)}`}),
		renderProduction(expertiseGroups, production, prices, recipes),
		renderBuyMaterials(buy),
		renderShipbuilders(requiredMats, knownCompanies, companyProductionById),
	);
}

function renderBuyMaterials(buy: Record<string, number>): HTMLElement {
	const section = element('section');
	section.append(element('h2', {textContent: 'buy'}));
	const mats = Object.entries(buy).sort(([a], [b]) => a.localeCompare(b));
	section.append(element('p', {
		textContent: mats.map(([mat, amount]) => `${formatAmount(amount)}x${mat}`).join(', '),
	}));
	return section;
}

async function pmmgMonthlyReport(): Promise<PMMGCompanyProduction> {
	const constants = await fetch('https://raw.githubusercontent.com/PMMG-Products/pmmg-products.github.io/main/reports/src/staticData/constants.ts')
			.then((res) => res.text());
	const match = constants.match(/export const months = \[(.*?)\];/s);
	if (!match)
		throw new Error('failed to parse PMMG months');
	const months = match[1].split(',').map((m) => m.trim().replace(/^"|"$/g, ''));
	const latestMonth = months.at(-1);
	if (!latestMonth)
		throw new Error('missing PMMG month');
	const report = await cachedFetchJSON(`https://pmmg-products.github.io/reports/data/company-data-${latestMonth}.json`);
	return report['individual'];
}

function renderShipbuilders(requiredMats: Record<string, number>,
		knownCompanies: Record<string, {Username: string}>, companyProductionById: PMMGCompanyProduction): HTMLElement {
	const matTickers = Object.keys(requiredMats).sort();
	const shipbuilderSet = new Set(shipbuilders);
	const shipbuildersById: Record<string, string> = {};
	for (const [companyId, company] of Object.entries(knownCompanies))
		if (shipbuilderSet.has(company.Username))
			shipbuildersById[companyId] = company.Username;

	const missingShipbuilders = shipbuilders
		.filter((username) => !Object.values(shipbuildersById).includes(username));
	if (missingShipbuilders.length > 0)
		return element('h3', {textContent: `missing shipbuilders in PMMG report: ${missingShipbuilders.join(', ')}`});

	const section = element('section');
	section.append(element('h2', {textContent: 'shipbuilders'}));

	const table = element('table');
	const header = element('tr');
	header.append(element('th', {textContent: 'mat'}));
	header.append(element('th', {textContent: 'amount'}));
	for (const username of Object.values(shipbuildersById))
		header.append(element('th', {textContent: username}));
	table.append(header);

	for (const mat of matTickers) {
		const row = element('tr');
		row.append(element('td', {textContent: mat}));
		row.append(element('td', {textContent: formatAmount(requiredMats[mat])}));
		for (const companyId of Object.keys(shipbuildersById)) {
			const makes = mat in companyProductionById[companyId];
			row.append(element('td', {textContent: makes ? '' : 'x'}));
		}
		table.append(row);
	}
	section.append(table);
	return section;
}

async function recipeForMats(): Promise<Record<string, Recipe>> {
	const allRecipes: Recipe[] = await cachedFetchJSON('https://api.prunplanner.org/data/recipes/');
	const matRecipes: Record<string, Recipe[]> = {}; // all ways to make a mat
	for (const recipe of allRecipes)
		for (const output of recipe.outputs) {
			const recipes = matRecipes[output.material_ticker];
			if (recipes)
				recipes.push(recipe);
			else
				matRecipes[output.material_ticker] = [recipe];
		}

	const matRecipe: Record<string, Recipe> = {}; // mats for which there's only one recipe to make
	for (const [mat, recipes] of Object.entries(matRecipes))
		if (recipes.length === 1)
			matRecipe[mat] = recipes[0];
	return matRecipe;
}

function analyzeMat(mat: string, amount: number, production: Production, buy: Record<string, number>,
		prices: Record<string, RawPrice>, recipes: Record<string, Recipe>): { cost: number, node: AnalysisNode } {
	const price = prices[mat];
	if (!price)
		throw new Error(`missing price for ${mat}`);
	const traded = price.AverageTraded30D ?? 0;
	if (BUY.has(mat)) {
		if (price.Ask == null)
			throw new Error(`missing ask price for ${mat}`);
		buy[mat] = (buy[mat] ?? 0) + amount;
		return {
			cost: price.Ask * amount,
			node: { text: `${formatAmount(amount)}x${mat} buy: ${formatAmount(price.Ask)}, daily traded ${formatFixed(traded, 1)}`, children: [] },
		};
	}

	const recipe = recipes[mat];
	if (!recipe)
		return { cost: 0, node: { text: `${formatAmount(amount)}x${mat} make (unknown recipe)`, children: [] } };

	const building = recipe.building_ticker;
	if (!production[building])
		production[building] = {};
	production[building][mat] = (production[building][mat] ?? 0) + amount;

	const liquid = traded > amount * 2 ? 'liquid' : 'not liquid';

	let totalCost = 0;
	const children: AnalysisNode[] = [];
	for (const inputMat of recipe.inputs) {
		const inputAmount = inputMat.material_amount * amount / recipe.outputs[0].material_amount;
		const {cost, node} = analyzeMat(inputMat.material_ticker, inputAmount, production, buy, prices, recipes);
		totalCost += cost;
		children.push(node);
	}
	children.push({ text: `cost: ${formatWhole(totalCost)}`, children: [] });
	return {
		cost: totalCost,
		node: { text: `${formatAmount(amount)}x${mat} make (${building}, ${liquid})`, children },
	};
}

function renderAnalysis(nodes: AnalysisNode[]): HTMLElement {
	const section = element('section');
	for (const node of nodes)
		section.append(renderAnalysisNode(node));
	return section;
}

function renderAnalysisNode(node: AnalysisNode, level = 0): HTMLElement {
	let el;
	if (node.children.length === 0) {
		el = element('div', {textContent: node.text, className: 'analysis-node'});
	} else {
		el = element('details', {className: 'analysis-node', open: true});
		el.append(element('summary', {textContent: node.text}));
		for (const child of node.children)
			el.append(renderAnalysisNode(child, level + 1));
	}
	if (level === 0)
		el.classList.add('root');
	return el;
}

function renderProduction(expertiseGroups: Record<string, string[]>, production: Production,
		prices: Record<string, RawPrice>, recipes: Record<string, Recipe>): HTMLElement {
	const section = element('section');
	section.append(element('h2', {textContent: 'production'}));

	for (const [expertise, buildings] of Object.entries(expertiseGroups)) {
		section.append(element('h3', {textContent: expertise}));
		for (const building of buildings) {
			const buildingMats = element('div');
			const mats = Object.entries(production[building]);
			let buildingMins = 0;
			for (const [index, [mat, amount]] of mats.entries()) {
				const traded = prices[mat]?.AverageTraded30D ?? 0;
				const span = element('span', {
					textContent: `${formatAmount(amount)}x${mat}`,
				});
				span.style.color = traded > amount * 2 ? '#0cc' : '#c70';
				buildingMats.append(span);
				if (index < mats.length - 1)
					buildingMats.append(document.createTextNode(' '));

				const recipe = recipes[mat];
				const outputPerRun = recipe.outputs.find((o) => o.material_ticker === mat)!.material_amount;
				buildingMins += amount / outputPerRun * (recipe.time_ms / 1000 / 60);
			}
			const numBuildings = buildingMins / (24*60) / 5 / 1.605; // one ship every 5 days, 160.5% efficiency
			const buildingRow = element('div', {className: 'building-row', textContent: `${formatFixed(numBuildings, 1)}x${building}`});
			buildingRow.append(buildingMats);
			section.append(buildingRow);
		}
	}

	return section;
}

function element<K extends keyof HTMLElementTagNameMap>(tagName: K,
		properties: Partial<HTMLElementTagNameMap[K]> = {}): HTMLElementTagNameMap[K] {
	const node = document.createElement(tagName);
	Object.assign(node, properties);
	return node;
}

function formatAmount(n: number): string {
	return n.toLocaleString(undefined, {maximumFractionDigits: 3});
}

function formatFixed(n: number, digits: number): string {
	return n.toLocaleString(undefined, {
		minimumFractionDigits: digits,
		maximumFractionDigits: digits,
	});
}

function formatWhole(n: number): string {
	return n.toLocaleString(undefined, {maximumFractionDigits: 0});
}

interface AnalysisNode {
	text: string
	children: AnalysisNode[]
}

interface Recipe {
	recipe_name: string
	building_ticker: string
	inputs: RecipeMat[]
	outputs: RecipeMat[]
	time_ms: number
}

interface RecipeMat {
	material_ticker: string
	material_amount: number
}

interface RawPrice {
	MaterialTicker: string
	ExchangeCode: string
	Ask: number | null
	AverageTraded30D: number | null
	Supply: number
}

interface Building {
	building_ticker: string
	expertise: string
}

type PMMGCompanyProduction = Record<string, Record<string, {amount: number}>>;
type Production = Record<string, Record<string, number>>;