/*
	========================================================================
	The 2022 r/place Atlas

	An atlas of Reddit's 2022 r/place, with information to each
	artwork	of the canvas provided by the community.

	Copyright (c) 2017 Roland Rytz <roland@draemm.li>
	Copyright (c) 2022 Place Atlas contributors

	Licensed under the GNU Affero General Public License Version 3
	https://place-atlas.stefanocoding.me/license.txt
	========================================================================
*/

const baseLinkElement = document.createElement("a")
baseLinkElement.className = "btn btn-primary text-truncate"
baseLinkElement.target = "_blank"
baseLinkElement.rel = "noopener noreferrer"

const baseGroupElement = document.createElement("div")
baseGroupElement.className = "btn-group-vertical"

function createLabel(name, value, parent) {
	const nameElement = document.createElement("span")
	nameElement.className = "fw-bold"
	nameElement.textContent = name
	const valueElement = document.createElement("span")
	valueElement.textContent = value
	parent.appendChild(nameElement)
	parent.appendChild(valueElement)
	return parent
}

function createInfoListItem(name, value) {
	const entryInfoListElement = document.createElement("li")
	entryInfoListElement.className = "list-group-item"
	createLabel(name, value, entryInfoListElement)
	return entryInfoListElement
}

function createInfoBlock(entry, isPreview) {
	const element = document.createElement("div")
	element.className = "card mb-2 overflow-hidden shadow"

	const headerElement = document.createElement("h4")
	headerElement.className = "card-header"

	const linkElement = document.createElement("a")
	linkElement.className = "text-decoration-none d-flex justify-content-between text-body"
	if (isPreview) linkElement.href = "#"
	else linkElement.href = formatHash(entry.id)
	const linkNameElement = document.createElement("span")
	linkNameElement.className = "flex-grow-1 text-break"
	linkNameElement.textContent = entry.name
	headerElement.appendChild(linkElement)
	linkElement.appendChild(linkNameElement)
	linkElement.insertAdjacentHTML("beforeend", '<i class="bi bi-link-45deg align-self-center link-primary" aria-hidden="true"></i>')
	element.appendChild(headerElement)

	const bodyElement = document.createElement("div")
	bodyElement.className = "card-body d-flex flex-column gap-3"
	element.appendChild(bodyElement)

	if (entry.description) {
		const descElement = document.createElement("div")
		descElement.id = "objectDescription"
		// Formats single line break as  br and two line breaks as a new paragraph
		let formattedDesc = entry.description.replace(/\n{2}/g, '</p><p>')
		formattedDesc = formattedDesc.replace(/\n/g, '<br>')
		descElement.innerHTML = '<p>' + formattedDesc + '</p>'
		bodyElement.appendChild(descElement)
	}

	const linkListElement = document.createElement("div")
	linkListElement.className = "d-flex flex-column gap-2"
	bodyElement.appendChild(linkListElement)

	const listElement = document.createElement("ul")
	listElement.className = "list-group list-group-flush"
	element.appendChild(listElement)

	if (entry.diff) {
		const diffElement = createInfoListItem("Diff: ", entry.diff)
		if (entry.diff === "add") {
			diffElement.className = "list-group-item list-group-item-success"
		} else if (entry.diff === "edit") {
			diffElement.className = "list-group-item list-group-item-warning"
		} else if (entry.diff === "delete") {
			diffElement.className = "list-group-item list-group-item-danger"
		}
		listElement.appendChild(diffElement)
	}

	// Enetry data submitted to preview does not include center or path
	if (!isPreview) {
		const [x, y] = entry.center
		listElement.appendChild(createInfoListItem("Position: ", `${Math.floor(x)}, ${Math.floor(y)}`))

		if (entry.path) {
			const area = calcPolygonArea(entry.path)
			listElement.appendChild(createInfoListItem("Area: ", `${area} pixels`))
		}
	}

	if (!(entry.links.subreddit === undefined || entry.links.subreddit.length === 0)) {
		const subredditGroupElement = baseGroupElement.cloneNode()
		linkListElement.appendChild(subredditGroupElement)

		entry.links.subreddit.forEach(subreddit => {
			if (subreddit) {
				subreddit = "r/" + subreddit
				const subredditLinkElement = baseLinkElement.cloneNode()
				subredditLinkElement.href = "https://reddit.com/" + subreddit
				subredditLinkElement.innerHTML = `<i class="bi bi-reddit" aria-hidden="true"></i> ${subreddit}`
				subredditGroupElement.appendChild(subredditLinkElement)
			}
		})
	}

	if (!(entry.links.website === undefined || entry.links.website.length === 0)) {
		const websiteGroupElement = baseGroupElement.cloneNode()
		linkListElement.appendChild(websiteGroupElement)

		entry.links.website.forEach(link => {
			if (link) {
				const websiteLinkElement = baseLinkElement.cloneNode()
				websiteLinkElement.href = link
				try {
					const urlObject = new URL(link)
					websiteLinkElement.innerHTML = `<i class="bi bi-globe" aria-hidden="true"></i> ${urlObject.hostname.replace(/^www./, "")}`
				} catch (e) {
					websiteLinkElement.innerHTML = `<i class="bi bi-globe" aria-hidden="true"></i> Website`
				}
				websiteGroupElement.appendChild(websiteLinkElement)
			}
		})
	}

	if (!(entry.links.discord === undefined || entry.links.discord.length === 0)) {
		const discordGroupElement = baseGroupElement.cloneNode()
		linkListElement.appendChild(discordGroupElement)

		entry.links.discord.forEach(link => {
			if (link) {
				const discordLinkElement = baseLinkElement.cloneNode()
				discordLinkElement.href = "https://discord.gg/" + link
				discordLinkElement.innerHTML = `<i class="bi bi-discord" aria-hidden="true"></i> ${link}`
				discordGroupElement.appendChild(discordLinkElement)
			}
		})
	}

	if (!(entry.links.wiki === undefined || entry.links.wiki.length === 0)) {
		const wikiGroupElement = baseGroupElement.cloneNode()
		linkListElement.appendChild(wikiGroupElement)

		entry.links.wiki.forEach(link => {
			if (link) {
				const wikiLinkElement = baseLinkElement.cloneNode()
				wikiLinkElement.href = "https://place-wiki.stefanocoding.me/wiki/" + link.replace(/ /g, '_')
				wikiLinkElement.innerHTML = `<i class="bi bi-book" aria-hidden="true"></i> Wiki Article`
				wikiGroupElement.appendChild(wikiLinkElement)
			}
		})
	}

	// Adds id footer
	const idElement = document.createElement("div")
	idElement.className = "py-1"
	createLabel("ID: ", entry.id, idElement)
	const idElementContainer = document.createElement("div")
	idElementContainer.className = "card-footer d-flex justify-content-between align-items-center"
	idElementContainer.appendChild(idElement)
	element.appendChild(idElementContainer)

	// Adds edit button only if element is not deleted
	if (!isPreview && (!entry.diff || entry.diff !== "delete")) {
		const editElement = document.createElement("a")
		editElement.textContent = "Edit"
		editElement.className = "btn btn-sm btn-outline-primary"
		editElement.href = "./?mode=draw&id=" + entry.id + formatHash(undefined)
		editElement.title = "Edit " + entry.name
		idElementContainer.appendChild(editElement)
	}

	// Removes empty elements
	if (!bodyElement.hasChildNodes()) bodyElement.remove()
	if (!linkListElement.hasChildNodes()) linkListElement.remove()
	if (!listElement.hasChildNodes()) listElement.remove()

	return element
}