import {cachedFetchJSON} from './cache';
import {Counter} from './counter';

const renderTarget = document.querySelector('#plan')!;
const shareURL = document.querySelector('#share_url') as HTMLInputElement;
const cxSelect = document.querySelector('#cx') as HTMLSelectElement;

function serializeToHash(shared: string, cx: string): void {
	const params = new URLSearchParams({shared, cx});
	document.location.hash = params.toString();
}

function deserializeFromHash(): {shareUUID: string, cx: string} | null {
	const params = new URLSearchParams(document.location.hash.substring(1));
	const shareUUID = params.get('shared');
	const cx = params.get('cx');
	if (shareUUID === null || cx === null)
		return null;
	shareURL.value = 'https://prunplanner.org/shared/' + shareUUID;
	cxSelect.value = cx;
	return {shareUUID, cx};
}

document.querySelector('form')!.addEventListener('submit', async (event) => {
	event.preventDefault();
	let shareUUID = shareURL.value;
	if (shareUUID) {
		if (shareUUID.startsWith('https://prunplanner.org/shared/'))
			shareUUID = shareUUID.substring('https://prunplanner.org/shared/'.length);
		const cx = cxSelect.value;
		await render(shareUUID, cx);
		serializeToHash(shareUUID, cx);
	}
});

{
	const hash = deserializeFromHash();
	if (hash !== null)
		void render(hash.shareUUID, hash.cx);
}

async function render(shareUUID: string, cx: string) {
	const loader = document.querySelector('#loader') as HTMLElement;
	loader.style.display = 'block';
	renderTarget.innerHTML = '';
	try {
		await _render(shareUUID, cx);
	} catch (e) {
		console.error(e);
		renderTarget.textContent = (e as Error).message;
	}
	loader.style.display = 'none';
}

async function _render(shareUUID: string, cx: string) {
	const [plan, buildings, recipeList, exchanges, materialList, graph]:
			[Plan, Building[], Recipe[], Exchange[], Material[], Graph] = await Promise.all([
		cachedFetchJSON('https://api.prunplanner.org/planning/shared/' + shareUUID),
		cachedFetchJSON('https://api.prunplanner.org/data/buildings/'),
		cachedFetchJSON('https://api.prunplanner.org/data/recipes/'),
		cachedFetchJSON('https://api.prunplanner.org/data/exchanges/'),
		cachedFetchJSON('https://api.prunplanner.org/data/materials/'),
		cachedFetchJSON('/graph_data.json'),
	]);
	const planet: Planet = await cachedFetchJSON(`https://api.prunplanner.org/data/planet/${plan.plan_details.planet_natural_id}/`);
	const planExperts = new Map<Expertise, number>(plan.plan_details.plan_data.experts.map(
			e => [e.type.toUpperCase() as Expertise, e.amount]));
	const buildingExpertise = new Map<string, Expertise>(buildings.map(b => [b.building_ticker, b.expertise]));
	const recipes = new Map<string, Recipe>(recipeList.map(r => [r.recipe_id, r]));
	const dailyTraded = new Map<string, number>(exchanges.filter((ex) => ex.exchange_code === cx)
			.map((ex) => [ex.ticker, ex.sum_traded_7d / 7]));
	const materials = new Map<string, Material>(materialList.map(m => [m.ticker, m]));

	const oneWayHours = travel(graph.edges, planet.system_id, cx);

	const planInput = new Counter();
	const planOutput = new Counter();
	for (const building of plan.plan_details.plan_data.buildings) {
		const expertise = buildingExpertise.get(building.name)!;
		const experts = planExperts.get(expertise)!;
		const {input, output} = calcBuilding(recipes, building, plan.plan_details.plan_cogc === expertise, experts, planet);
		planInput.update(input);
		planOutput.update(output);
	}

	const net = new Counter();
	net.update(planOutput);
	for (const [key, amount] of planInput.entries())
		net.add(key, -amount);

	renderTarget.innerHTML = `
		<table>
			<tr>
				<th></th>
				<th>in</th>
				<th>out</th>
				<th>net</th>
				<th>daily traded</th>
				<th>% of traded</th>
			</tr>
			${[...net.entries()].map(([mat, netAmount]) => {
				const traded = dailyTraded.get(mat)!;
				const colorPct = Math.min(Math.abs(netAmount) / traded * 500, 100);
				const color = `color-mix(in xyz, #f80 ${colorPct}%, #0aa)`;
				return `<tr>
					<td>${mat}</td>
					<td>${formatNumber(planInput.get(mat))}</td>
					<td>${formatNumber(planOutput.get(mat))}</td>
					<td>${formatNumber(netAmount)}</td>
					<td>${wholeFmt.format(traded)}</td>
					<td style="color: ${color}">${pctFmt.format(netAmount / traded)}</td>
				</tr>`;
			}).join('')}
		</table>`;

	if (oneWayHours !== null) {
		const {shippingBottleneckType, shippingBottleneckAmount} = shippingBottleneck(materials, net);
		const roundTripHours = oneWayHours * 2;
		const scbThroughput = 24 / roundTripHours * 500;
		renderTarget.innerHTML += `
			<p>
				shipping bottleneck: ${formatNumber(shippingBottleneckAmount)} (${shippingBottleneckType})
			</p>
			<p>
				one-way to/from ${cx}: ${formatNumber(oneWayHours)} hours
				<br>round-trip to ${cx}: ${formatNumber(roundTripHours)} hours
				<br>non-stop SCB shipping throughput per day: 24 ÷ ${formatNumber(roundTripHours)} × 500 = ${formatNumber(scbThroughput)}
				<br>non-stop SCBs needed: ${formatNumber(shippingBottleneckAmount)} ÷ ${formatNumber(scbThroughput)}
				= ${formatNumber(shippingBottleneckAmount / scbThroughput)}
			</p>
		`;
	}
}

function travel(edges: Edge[], system: string, cx: string): number | null {
	const {parsecs, jumps} = ftlDistance(edges, system, cx);
	if (jumps === 0)
		return null;
	// SCB JMPs at 4pc/hr. RCT CHRGs in 7m30s. 30m DEP, 1.5hr APP+(TO/LAND)
	return Math.round(parsecs / 4 + (jumps - 1) * 0.125 + 2);
}

/** dijkstra to find the shortest FTL route from system to CX */
function ftlDistance(edges: Edge[], system: string, cx: string): {parsecs: number; jumps: number} {
	const cxSystems: Record<string, string> = {
		'AI1': '8ecf9670ba070d78cfb5537e8d9f1b6c',
		'CI1': '92029ff27c1abe932bd2c61ee4c492c7',
		'CI2': 'a4ba8b12739da65efc2b518703652ee1',
		'IC1': 'f2f57766ebaca9d69efae41ccf4d8853',
		'NC1': '49b6615d39ccba05752b3be77b2ebf36',
		'NC2': 'afda9bea7f948f4a066a8882cdfa9055',
	};
	const destination = cxSystems[cx]!;
	if (destination === system)
		return {parsecs: 0, jumps: 0};

	const adjacency = new Map<string, Array<{to: string; parsecs: number}>>();
	for (const edge of edges) {
		const startNeighbors = adjacency.get(edge.start) ?? [];
		startNeighbors.push({to: edge.end, parsecs: edge.distance});
		adjacency.set(edge.start, startNeighbors);
		const endNeighbors = adjacency.get(edge.end) ?? [];
		endNeighbors.push({to: edge.start, parsecs: edge.distance});
		adjacency.set(edge.end, endNeighbors);
	}

	const best = new Map<string, number>([[system, 0]]);
	const frontier: Array<{node: string; parsecs: number; jumps: number}> = [{node: system, parsecs: 0, jumps: 0}];

	while (frontier.length > 0) {
		frontier.sort((a, b) => a.parsecs - b.parsecs);
		const current = frontier.shift()!;
		if (current.node === destination)
			return {parsecs: current.parsecs, jumps: current.jumps};
		if (current.parsecs !== best.get(current.node))
			continue;

		for (const neighbor of adjacency.get(current.node) ?? []) {
			const totalDistance = current.parsecs + neighbor.parsecs;
			if (totalDistance >= (best.get(neighbor.to) ?? Number.POSITIVE_INFINITY))
				continue;
			best.set(neighbor.to, totalDistance);
			frontier.push({node: neighbor.to, parsecs: totalDistance, jumps: current.jumps + 1});
		}
	}

	throw new Error(`no route from ${system} to ${cx}`);
}

function calcBuilding(recipes: Map<string, Recipe>, building: PlanBuilding, cogc: boolean, experts: number,
		planet: Planet): {input: Counter, output: Counter} {
	let efficiency = expertBonus[experts];
	if (cogc)
		efficiency *= 1.25;
	const input = new Counter();
	const output = new Counter();
	if (['COL', 'EXT', 'RIG'].includes(building.name)) {
		const total = building.active_recipes.reduce((sum, recipe) => sum + recipe.amount, 0);
		for (const recipe of building.active_recipes) {
			const [buildingName, recipeName] = recipe.recipeid.split('#');
			if (buildingName != building.name)
				throw new Error(`recipe ${recipe.recipeid} doesn't match building ${building.name}`);
			const resource = planet.resources.find((r) => r.material_ticker === recipeName);
			if (resource === undefined)
				throw new Error(`resource ${recipeName} not found on planet ${planet.planet_natural_id}`);
			const dailyOutput = resource.daily_extraction * efficiency * building.amount * recipe.amount / total;
			output.add(recipeName, dailyOutput);
		}
	} else {
		const totalMs = building.active_recipes.reduce((sum, recipe) => {
			const recipeData = recipes.get(recipe.recipeid);
			if (recipeData === undefined)
				throw new Error(`recipe ${recipe.recipeid} not found`);
			return sum + recipeData.time_ms * recipe.amount;
		}, 0);
		for (const recipe of building.active_recipes) {
			const recipeData = recipes.get(recipe.recipeid)!;
			let runsPerDay = 24 * 60 * 60 * 1000 / totalMs * efficiency * building.amount * recipe.amount;
			if (['FRM', 'ORC'].includes(building.name))
				runsPerDay *= 1 + planet.fertility * (10 / 33);
			for (const inputMaterial of recipeData.inputs)
				input.add(inputMaterial.material_ticker, inputMaterial.material_amount * runsPerDay);
			for (const outputMaterial of recipeData.outputs)
				output.add(outputMaterial.material_ticker, outputMaterial.material_amount * runsPerDay);
		}
	}
	return {input, output};
}

function shippingBottleneck(materials: Map<string, Material>, net: Counter):
		{shippingBottleneckType: string, shippingBottleneckAmount: number} {
	let importWeight = 0, importVol = 0;
	let exportWeight = 0, exportVol = 0;
	for (const [mat, amount] of net.entries()) {
		const material = materials.get(mat)!;
		if (amount < 0) {
			importWeight -= amount * material.weight;
			importVol -= amount * material.volume;
		} else if (amount > 0) {
			exportWeight += amount * material.weight;
			exportVol += amount * material.volume;
		}
	}
	const bottlenecks = [
		{shippingBottleneckType: 'import weight', shippingBottleneckAmount: importWeight},
		{shippingBottleneckType: 'import volume', shippingBottleneckAmount: importVol},
		{shippingBottleneckType: 'export weight', shippingBottleneckAmount: exportWeight},
		{shippingBottleneckType: 'export volume', shippingBottleneckAmount: exportVol},
	];
	bottlenecks.sort((a, b) => b.shippingBottleneckAmount - a.shippingBottleneckAmount);
	return bottlenecks[0];
}

const numberFmt = new Intl.NumberFormat(undefined, {maximumFractionDigits: 2});
const wholeFmt = new Intl.NumberFormat(undefined, {maximumFractionDigits: 0});
const pctFmt = new Intl.NumberFormat(undefined, {style: 'percent', maximumFractionDigits: 2});
function formatNumber(num: number): string {
	if (num === 0)
		return '';
	return numberFmt.format(num);
}

const expertBonus: Record<number, number> = {
	0: 1,
	1: 1.0306,
	2: 1.0696,
	3: 1.1248,
	4: 1.1974,
	5: 1.284,
} as const;

interface Plan {
	plan_details: {
		planet_natural_id: string
		plan_cogc: Expertise
		plan_data: {
			buildings: Array<PlanBuilding>
			experts: Array<{type: string; amount: number}>
		}
	}
}

interface PlanBuilding {
	name: string
	active_recipes: Array<{amount: number; recipeid: string}>
	amount: number
}

interface Building {
	building_ticker: string
	expertise: Expertise
}
type Expertise = 'AGRICULTURE' | 'CHEMISTRY' | 'CONSTRUCTION' | 'ELECTRONICS' | 'FOOD_INDUSTRIES' | 'FUEL_REFINING' |
	'MANUFACTURING' | 'METALLURGY' | 'RESOURCE_EXTRACTION';

interface Recipe {
	recipe_id: string
	inputs: Array<{material_ticker: string; material_amount: number}>
	outputs: Array<{material_ticker: string; material_amount: number}>
	time_ms: number
}

interface Exchange {
	ticker: string
	exchange_code: string
	sum_traded_7d: number // avg_traded_7d is nonsense
}

interface Material {
	ticker: string
	weight: number
	volume: number
}

interface Graph {
	edges: Array<Edge>
}
interface Edge {
	start: string
	end: string
	distance: number
}

interface Planet {
	planet_natural_id: string
	system_id: string
	fertility: number
	resources: Array<{
		material_ticker: string
		daily_extraction: number
	}>
}