/* frontend for the part database
 * Copyright (C) 2023 King Kévin <kingkevin@cuvoodoo.info>
 * SPDX-License-Identifier: GPL-3.0-or-later
 */
"use strict";

// the last search query
var last_search = null;
// the collection of parts
var parts = null;
// last selected part
var part_id = null;
// part field to populate
const fields = ["name", "description", "details", "package", "manufacturer", "mpn", "family", "datasheet", "page", "location", "stock"];
// URLs to set
const urls = ["page", "datasheet"];
// tables with key value information
const tables = ["distributors", "properties", "components"];

function search()
{
	const terms = document.getElementById('terms');
	if (terms && terms.value && terms.value.length >= 3) {
	} else {
		return;
	}

	last_search = '/search?terms=' + terms.value;
	let xhr = new XMLHttpRequest();
	xhr.open('GET', last_search, true);
	xhr.onload = function() {
		if (decodeURI(this.responseURL).endsWith(last_search)) {
			parts = JSON.parse(this.response);
			results();
		}
	};
	xhr.onerror = function() {
		console.log("search call failed");
	};
	xhr.send();
}

function results()
{
	const results = document.getElementById('results');
	results.innerHTML = null;
	for (const part of parts) {
		const option = document.createElement('option');
		option.setAttribute('value', part.id);
		option.innerHTML = part.name;
		if (part.description) {
			option.innerHTML += " (" + part.description + ")";
		}
		if (part_id == part.id) {
			option.selected = "selected";
		}
		results.appendChild(option);
	}
	select_part(); // in case we reselected
}

function clear()
{
	// clear part fields
	for (const field of fields) {
		const input = document.getElementById('part_' + field);
		input.value = "";
	}
	// clear URLs
	for (const field of urls) {
		const span = document.getElementById('url_' + field);
		span.innerHTML = span.innerText;
	}
	// clear tables
	for (const table of tables) {
		const body = document.getElementById(table);
		body.innerHTML = null;
	}
}

function select_part()
{
	const results = document.getElementById('results');
	if (results.selectedIndex >= 0) {
		part_id = parseInt(results.options[results.selectedIndex].value);
		for (const part of parts) {
			if (part.id == part_id) {
				//console.log(part);
				// populate part fields
				for (const field of fields) {
					const input = document.getElementById('part_' + field);
					if (undefined === part[field]) {
						input.value = "";
					} else {
						input.value = part[field];
					}
				}
				// set URLs
				for (const field of urls) {
					const span = document.getElementById('url_' + field);
					const text = span.innerText;
					span.innerHTML = null;
					if (undefined === part[field] || null == part[field]) {
						span.innerHTML = text;
					} else {
						const a = document.createElement('a');
						a.href = part[field];
						a.innerText = text;
						span.appendChild(a);
					}
				}
				// add distributors, properties and components
				for (const table of tables) {
					const tbody = document.getElementById(table);
					tbody.innerHTML = null;
					part[table].push({name: "", value: ""}); // empty field to add
					for (const row of part[table]) {
						const tr = document.createElement('tr');
						let td = document.createElement('td');
						let input = document.createElement('input');
						input.type = "text";
						input.style.width = "95%";
						input.value = row.name;
						td.appendChild(input);
						tr.appendChild(td);
						if (null != row.value) {
							td = document.createElement('td');
							input = document.createElement('input');
							input.type = "text";
							input.value = row.value;
							input.style.width = "95%";
							td.appendChild(input);
							tr.appendChild(td);
						}
						if (row.sku) {
							td = document.createElement('td');
							input = document.createElement('input');
							input.type = "text";
							input.value = row.sku;
							input.style.width = "95%";
							td.appendChild(input);
							tr.appendChild(td);
						}
						if (null != row.quantity) {
							td = document.createElement('td');
							input = document.createElement('input');
							input.type = "number";
							input.min = "0";
							input.step = "1";
							input.value = row.quantity;
							input.style.width = "95%";
							td.appendChild(input);
							tr.appendChild(td);
						}
						if (row.url) {
							td = document.createElement('td');
							td.innerHTML = "<a href='" + row.url + "'>link</a>";
							tr.appendChild(td);
						}
						tbody.appendChild(tr);
					}
				}
				// add attachments
				const attachments = document.getElementById('attachments');
				attachments.innerHTML = null;
				for (const attachment of part["attachments"]) {
					const a = document.createElement('a');
					a.href = attachment;
					const img = document.createElement('img');
					img.alt = attachment.split("/").slice(-1);
					img.src = attachment;
					a.appendChild(img);
					attachments.appendChild(a);
				}
			}
		}
	}
}

function delete_part()
{
	if (null == parts) {
		return;
	}
	const results = document.getElementById('results');
	if (results.selectedIndex < 0) {
		return;
	}
	const part_selected = parseInt(results.options[results.selectedIndex].value);
	const xhr = new XMLHttpRequest();
	xhr.open('GET', '/delete/' + part_selected, true);
	xhr.onload = function() {
		clear();
		search(); // refresh search
	};
	xhr.onerror = function() {
		console.log("delete part failed");
	};
	xhr.send();
}

function update_part()
{
	// the part to update
	let part = {};
	// its id
	const results = document.getElementById('results');
	if (results.selectedIndex >= 0) {
		part.id = parseInt(results.options[results.selectedIndex].value);
	}
	// the fields
	for (const field of fields) {
		const input = document.getElementById('part_' + field);
		part[field] = input.value;
	}
	if (part["name"].length == 0) {
		return;
	}
	// get distributors
	part.distributors = [];
	const distributors = document.getElementById('distributors');
	for (const distributor of distributors.rows) {
		part.distributors.push({name: distributor.cells[0].firstChild.value, sku: distributor.cells[1].firstChild.value});
	}
	// get properties
	part.properties = [];
	const properties = document.getElementById('properties');
	for (const prop of properties.rows) {
		part.properties.push({name: prop.cells[0].firstChild.value, value: prop.cells[1].firstChild.value});
	}
	// get components
	part.components = [];
	const components = document.getElementById('components');
	for (const component of components.rows) {
		const nam = component.cells[0].firstChild.value;
		const q = component.cells[1].firstChild.value;
		if (nam && nam.length > 0) {
			part.components.push({name: nam, quantity: parseInt(q)});
		}
	}
	console.log(part);

	var post = new XMLHttpRequest();
	post.open("POST", "part");
	post.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
	post.onload = function() {
		clear();
		search(); // refresh search
	};
	post.onerror = function() {
		console.log("update part failed");
	};
	post.send(JSON.stringify(part));
}