import {
	type ButtonFeatures,
	ButtonType,
	type CheckboxFeatures,
	type ElementFeatures,
	type FormFeatures,
	HyperlinkDestination,
	type HyperlinkFeatures,
	type LabelFeatures,
	type TemplateBuilder
} from '../common/template';

function tag<T extends keyof HTMLElementTagNameMap>(tagName: T, features: ElementFeatures, contents: Node[]): HTMLElementTagNameMap[T] {
	const element = document.createElement(tagName)
	if (typeof features.id !== "undefined") {
		element.id = features.id
	}
	if (typeof features.classes !== "undefined") {
		if (typeof features.classes === "string") {
			element.classList.add(features.classes)
		} else {
			for (const className of features.classes) {
				element.classList.add(className)
			}
		}
	}
	if (typeof features.data !== "undefined") {
		for (const [key, value] of features.data) {
			element.dataset[key] = value
		}
	}
	for (const node of contents) {
		element.appendChild(node)
	}
	return element
}

class DOMTemplateBuilderImpl implements TemplateBuilder<Node> {
	makeButton(features: ButtonFeatures, ...contents: Node[]): HTMLButtonElement {
		const element = tag('button', features, contents)
		element.classList.add("button")
		element.type = features.type ?? ButtonType.Button
		if (typeof features.name === "string") {
			element.name = features.name
		}
		if (typeof features.value === "string") {
			element.value = features.value
		}
		return element
	}

	makeCheckbox(features: CheckboxFeatures, ...contents: Node[]): HTMLInputElement {
		const element = tag('input', features, contents)
		element.type = "checkbox"
		element.name = features.name
		if (features.checked) {
			element.checked = true
		}
		if (typeof features.value === "string") {
			element.value = features.value
		}
		return element
	}

	makeDiv(features: ElementFeatures, ...contents: Node[]): HTMLDivElement {
		return tag('div', features, contents);
	}

	makeFooter(features: ElementFeatures, ...contents: Node[]): HTMLElement {
		return tag('footer', features, contents);
	}

	makeForm(features: FormFeatures, ...contents: Node[]): HTMLFormElement {
		const element = tag('form', features, contents)
		element.action = features.action
		element.method = features.method
		return element;
	}

	makeHeader(features: ElementFeatures, ...contents: Node[]): HTMLElement {
		return tag('header', features, contents)
	}

	makeHeading1(features: ElementFeatures, ...contents: Node[]): HTMLHeadingElement {
		return tag('h1', features, contents);
	}

	makeHeading2(features: ElementFeatures, ...contents: Node[]): HTMLHeadingElement {
		return tag('h2', features, contents);
	}

	makeHyperlink(features: HyperlinkFeatures, ...contents: Node[]): HTMLAnchorElement {
		const element = tag('a', features, contents)
		element.href = features.url
		if (features.destination === HyperlinkDestination.External) {
			element.rel = "external nofollow noreferrer"
		}
		if (features.asButton) {
			element.classList.add("button")
			element.draggable = false
		}
		return element;
	}

	makeLabel(features: LabelFeatures, ...contents: Node[]): HTMLLabelElement {
		const element = tag('label', features, contents)
		if (typeof features.forId === "string") {
			element.htmlFor = features.forId
		}
		return element;
	}

	makeListItem(features: ElementFeatures, ...contents: Node[]): HTMLLIElement {
		return tag('li', features, contents)
	}

	makeNav(features: ElementFeatures, ...contents: Node[]): HTMLElement {
		return tag('nav', features, contents)
	}

	makeNoscript(features: ElementFeatures, ...contents: Node[]): HTMLElement {
		return tag('noscript', features, contents);
	}

	makeParagraph(features: ElementFeatures, ...contents: Node[]): HTMLParagraphElement {
		return tag('p', features, contents);
	}

	makeSpan(features: ElementFeatures, ...contents: Node[]): HTMLSpanElement {
		return tag('span', features, contents);
	}

	makeText(text: string): Text {
		return document.createTextNode(text);
	}

	makeUnorderedList(features: ElementFeatures, ...contents: Node[]): HTMLUListElement {
		return tag('ul', features, contents);
	}
}

export const DOMTemplateBuilder = new DOMTemplateBuilderImpl()