class Category {
	name: string
	thumbnail: string|null
	constructor(raw: any) {
		this.name = raw['name']
		this.thumbnail= raw['thumbnail']

		// Setting some defaults
		if(!this.name) { this.name = null }
		if(!this.thumbnail) { this.thumbnail= null }
	}

	title_link() : HTMLHeadingElement {
		let container = document.createElement('h2')

		let link = document.createElement('a')
		if(this.name) {
			link.href = `/category/${this.name}`
			link.text = this.name
		} else  {
			link.href = '#'
			link.text = this.name + 'ft. No thumbnail'
		}
		link.text = link.text[0].toUpperCase() + link.text.substring(1, link.text.length)

		container.appendChild(link)


		return container
	}

	thumbnail_div() : HTMLAnchorElement {
		let nail = document.createElement('img')
		nail.className = 'img-fluid'

		// Modern browser's should be able to cache this request
		if(!(this.thumbnail == null || this.thumbnail.length == 0)) {
			nail.setAttribute('src', `${this.thumbnail}`)
		} else{
			nail.setAttribute('src', '/static/cantfindshit.gif')
		}

		let link = document.createElement('a')
		if(this.name) {
			link.href = `/category/${this.name}`
		} else  {
			link.href = '#'
		}
		link.appendChild(nail)

		return link
	}


	public as_div() {
		let container = document.createElement('div')
		container.className = 'video-block'

		let title = this.title_link()
		let thumbnail = this.thumbnail_div()

		container.appendChild(title)
		container.appendChild(thumbnail)

		// Dump gallery onto the main page
		document.getElementById('main-container').appendChild(container)

		return container
	}
}


function ready_handler(e?: Event) : Event {
	// Only let this make a get request once we're ready on the page
	if(document.readyState != 'complete') { return e }

	// All we do here is basically make a get request to /api/categories
	const endpoint = window.location.origin + '/api/categories'
	let xml = new XMLHttpRequest()

	xml.onload = function() {
		if(this.getResponseHeader('Content-Type') == 'application/json') {
			let raw = JSON.parse(this.responseText)
			for(const cat_raw of raw) {
				let cat = new Category(cat_raw)
				cat.as_div()
			}
		}
	}

	// Fire request
	xml.open('GET', endpoint, true) // sync request
	xml.send(null) // nothing required for stuff

	return e
}

document.addEventListener('readystatechange', ready_handler)