import { requestPVE, requestAPI, goToPage, setTitleAndHeader, setAppearance } from "./utils.js";
import { alert, dialog } from "./dialog.js";
import { setupClientSync } from "./clientsync.js";
import wfAlign from "../modules/wfa.js";

window.addEventListener("DOMContentLoaded", init);

let instances = [];

async function init () {
	setAppearance();
	setTitleAndHeader();
	const cookie = document.cookie;
	if (cookie === "") {
		goToPage("login.html");
	}

	document.querySelector("#instance-add").addEventListener("click", handleInstanceAdd);
	document.querySelector("#vm-search").addEventListener("input", populateInstances);

	setupClientSync(refreshInstances);
}

async function refreshInstances () {
	await getInstances();
	await populateInstances();
}

async function getInstances () {
	const resources = await requestPVE("/cluster/resources", "GET");
	instances = [];
	resources.data.forEach((element) => {
		if (element.type === "lxc" || element.type === "qemu") {
			const nodeName = element.node;
			const nodeStatus = resources.data.find(item => item.node === nodeName && item.type === "node").status;
			element.node = { name: nodeName, status: nodeStatus };
			instances.push(element);
		}
	});
}

async function populateInstances () {
	let searchCriteria = localStorage.getItem("search-criteria");
	if (!searchCriteria) {
		searchCriteria = "fuzzy";
		localStorage.setItem("search-criteria", "fuzzy");
	}
	const searchQuery = document.querySelector("#search").value || null;
	let criteria;
	if (!searchQuery) {
		criteria = (a, b) => {
			return (a.vmid > b.vmid) ? 1 : -1;
		};
	}
	else if (searchCriteria === "exact") {
		criteria = (a, b) => {
			const aInc = a.name.toLowerCase().includes(searchQuery.toLowerCase());
			const bInc = b.name.toLowerCase().includes(searchQuery.toLowerCase());
			if (aInc && bInc) {
				return a.vmid > b.vmid ? 1 : -1;
			}
			else if (aInc && !bInc) {
				return -1;
			}
			else if (!aInc && bInc) {
				return 1;
			}
			else {
				return a.vmid > b.vmid ? 1 : -1;
			}
		};
	}
	else if (searchCriteria === "fuzzy") {
		const penalties = {
			m: 0,
			x: 1,
			o: 1,
			e: 1
		};
		criteria = (a, b) => {
			// lower is better
			const aAlign = wfAlign(a.name.toLowerCase(), searchQuery.toLowerCase(), penalties);
			const aScore = aAlign.score / a.name.length;
			const bAlign = wfAlign(b.name.toLowerCase(), searchQuery.toLowerCase(), penalties);
			const bScore = bAlign.score / b.name.length;
			if (aScore === bScore) {
				return a.vmid > b.vmid ? 1 : -1;
			}
			else {
				return aScore - bScore;
			}
		};
	}
	instances.sort(criteria);
	const instanceContainer = document.querySelector("#instance-container");
	instanceContainer.innerHTML = "";
	for (let i = 0; i < instances.length; i++) {
		const newInstance = document.createElement("instance-card");
		instances[i].searchQuery = searchQuery;
		newInstance.data = instances[i];
		instanceContainer.append(newInstance);
	}
}

async function handleInstanceAdd () {
	const header = "Create New Instance";

	const body = `
		<form method="dialog" class="input-grid" style="grid-template-columns: auto 1fr;" id="form">
			<label for="type">Instance Type</label>
			<select class="w3-select w3-border" name="type" id="type" required>
				<option value="lxc">Container</option>
				<option value="qemu">Virtual Machine</option>
			</select>
			<label for="node">Node</label>
			<select class="w3-select w3-border" name="node" id="node" required></select>
			<label for="name">Name</label>
			<input class="w3-input w3-border" name="name" id="name" required></input>
			<label for="vmid">ID</label>
			<input class="w3-input w3-border" name="vmid" id="vmid" type="number" required></input>
			<label for="pool">Pool</label>
			<select class="w3-select w3-border" name="pool" id="pool" required></select>
			<label for="cores">Cores (Threads)</label>
			<input class="w3-input w3-border" name="cores" id="cores" type="number" min="1" max="8192" required></input>
			<label for="memory">Memory (MiB)</label>
			<input class="w3-input w3-border" name="memory" id="memory" type="number" min="16", step="1" required></input>
			<p class="container-specific none" style="grid-column: 1 / span 2; text-align: center;">Container Options</p>
			<label class="container-specific none" for="swap">Swap (MiB)</label>
			<input class="w3-input w3-border container-specific none" name="swap" id="swap" type="number" min="0" step="1" required disabled></input>
			<label class="container-specific none" for="template-image">Template Image</label>
			<select class="w3-select w3-border container-specific none" name="template-image" id="template-image" required disabled></select>
			<label class="container-specific none" for="rootfs-storage">ROOTFS Storage</label>
			<select class="w3-select w3-border container-specific none" name="rootfs-storage" id="rootfs-storage" required disabled></select>
			<label class="container-specific none" for="rootfs-size">ROOTFS Size (GiB)</label>
			<input class="w3-input w3-border container-specific none" name="rootfs-size" id="rootfs-size" type="number" min="0" max="131072" required disabled></input>
			<label class="container-specific none" for="password">Password</label>
			<input class="w3-input w3-border container-specific none" name="password" id="password" type="password" required disabled></input>
		</form>
	`;

	const templates = await requestAPI("/user/ct-templates", "GET");

	const d = dialog(header, body, async (result, form) => {
		if (result === "confirm") {
			const body = {
				name: form.get("name"),
				cores: form.get("cores"),
				memory: form.get("memory"),
				pool: form.get("pool")
			};
			if (form.get("type") === "lxc") {
				body.swap = form.get("swap");
				body.password = form.get("password");
				body.ostemplate = form.get("template-image");
				body.rootfslocation = form.get("rootfs-storage");
				body.rootfssize = form.get("rootfs-size");
			}
			const node = form.get("node");
			const type = form.get("type");
			const vmid = form.get("vmid");
			const result = await requestAPI(`/cluster/${node}/${type}/${vmid}/create`, "POST", body);
			if (result.status === 200) {
				populateInstances();
			}
			else {
				alert(result.error);
				populateInstances();
			}
		}
	});

	const typeSelect = d.querySelector("#type");
	typeSelect.selectedIndex = -1;
	typeSelect.addEventListener("change", () => {
		if (typeSelect.value === "qemu") {
			d.querySelectorAll(".container-specific").forEach((element) => {
				element.classList.add("none");
				element.disabled = true;
			});
		}
		else {
			d.querySelectorAll(".container-specific").forEach((element) => {
				element.classList.remove("none");
				element.disabled = false;
			});
		}
	});

	const rootfsContent = "rootdir";
	const rootfsStorage = d.querySelector("#rootfs-storage");
	rootfsStorage.selectedIndex = -1;

	const userResources = await requestAPI("/user/dynamic/resources", "GET");
	const userCluster = await requestAPI("/user/config/cluster", "GET");

	const nodeSelect = d.querySelector("#node");
	const clusterNodes = await requestPVE("/nodes", "GET");
	const allowedNodes = Object.keys(userCluster.nodes);
	clusterNodes.data.forEach((element) => {
		if (element.status === "online" && allowedNodes.includes(element.node)) {
			nodeSelect.add(new Option(element.node));
		}
	});
	nodeSelect.selectedIndex = -1;
	nodeSelect.addEventListener("change", async () => { // change rootfs storage based on node
		const node = nodeSelect.value;
		const storage = await requestPVE(`/nodes/${node}/storage`, "GET");
		storage.data.forEach((element) => {
			if (element.content.includes(rootfsContent)) {
				rootfsStorage.add(new Option(element.storage));
			}
		});
		rootfsStorage.selectedIndex = -1;

		// set core and memory min/max depending on node selected
		if (node in userResources.cores.nodes) {
			d.querySelector("#cores").max = userResources.cores.nodes[node].avail;
		}
		else {
			d.querySelector("#cores").max = userResources.cores.global.avail;
		}

		if (node in userResources.memory.nodes) {
			d.querySelector("#memory").max = userResources.memory.nodes[node].avail;
		}
		else {
			d.querySelector("#memory").max = userResources.memory.global.avail;
		}
	});

	// set vmid min/max
	d.querySelector("#vmid").min = userCluster.vmid.min;
	d.querySelector("#vmid").max = userCluster.vmid.max;

	// add user pools to selector
	const poolSelect = d.querySelector("#pool");
	const userPools = Object.keys(userCluster.pools);
	userPools.forEach((element) => {
		poolSelect.add(new Option(element));
	});
	poolSelect.selectedIndex = -1;

	// add template images to selector
	const templateImage = d.querySelector("#template-image"); // populate templateImage depending on selected image storage
	for (const template of templates) {
		templateImage.append(new Option(template.name, template.volid));
	}
	templateImage.selectedIndex = -1;
}