package html

import "fmt"

type RepoFileContext struct {
	BaseContext
	RepoHeaderComponentContext
	RepoBreadcrumbComponentContext
	Code   string
	Commit string
	Path   string
}

func (rfc RepoFileContext) Permalink() string {
	return fmt.Sprintf("/%s/tree/%s/%s", rfc.RepoBreadcrumbComponentContext.Repo, rfc.Commit, rfc.Path)
}

templ RepoFile(rfc RepoFileContext) {
	@base(rfc.BaseContext) {
		@repoHeaderComponent(rfc.RepoHeaderComponentContext)
		<div class="mt-2 text-text">
			@repoBreadcrumbComponent(rfc.RepoBreadcrumbComponentContext)
			{ " - " }
			<a class="text-text underline decoration-text/50 decoration-dashed hover:decoration-solid" href="?raw">raw</a>
			{ " - " }
			<a class="text-text underline decoration-text/50 decoration-dashed hover:decoration-solid" id="permalink" data-permalink={ rfc.Permalink() } href={ rfc.Permalink() }>permalink</a>
			<div class="code relative">
				@templ.Raw(rfc.Code)
				<button id="copy" class="absolute top-0 right-0 rounded bg-base hover:bg-surface0"></button>
			</div>
		</div>
	}
	<script>
		const lineRe = /#L(\d+)(?:-L(\d+))?/g
		const $lineLines = document.querySelectorAll(".chroma .lntable .lnt");
		const $codeLines = document.querySelectorAll(".chroma .lntable .line");
		const $copyButton = document.getElementById('copy');
		const $permalink = document.getElementById('permalink');
		const $copyIcon = "📋";
		const $copiedIcon = "✅";
		let $code = ""
		for (let codeLine of $codeLines) $code += codeLine.innerText;
		let start = 0;
		let end = 0;

		const results = [...location.hash.matchAll(lineRe)];		
		if (0 in results) {
			start = results[0][1] !== undefined ? parseInt(results[0][1]) : 0;
			end = results[0][2] !== undefined ? parseInt(results[0][2]) : 0;
		}
		if (start !== 0) {
			deactivateLines();
			activateLines(start, end);
			let anchor = `#${start}`;
      if (end !== 0) anchor += `-${end}`;
      if (anchor !== "") $permalink.href = $permalink.dataset.permalink + anchor;
			$lineLines[start-1].scrollIntoView(true);
		}

		for (let line of $lineLines) {
			line.addEventListener("click", (event) => {
				event.preventDefault();
				deactivateLines();
				const n = parseInt(line.id.substring(1));
				let anchor = "";
				if (event.shiftKey) {
					end = n;
					anchor = `#L${start}-L${end}`;
				} else if (start === n) {
					start = 0;
					end = 0;
				} else {
					start = n;
					end = 0;
					anchor = `#L${start}`;
				}
				history.replaceState(null, null, window.location.pathname + anchor);
				$permalink.href = $permalink.dataset.permalink + anchor;
				if (start !== 0) activateLines(start, end);
			});
		}

		if (navigator.clipboard && navigator.clipboard.writeText) {
			$copyButton.innerText = $copyIcon;
			$copyButton.classList.remove("hidden");
    }
		$copyButton.addEventListener("click", () => {
      navigator.clipboard.writeText($code);
			$copyButton.innerText = $copiedIcon;
			setTimeout(() => {
				$copyButton.innerText = $copyIcon;
			}, 1000);
    });

		function activateLines(start, end) {
			if (end < start) end = start;
			for (let idx = start - 1; idx < end; idx++) {
				$codeLines[idx].classList.add("active");
			}
		}

		function deactivateLines() {
			for (let code of $codeLines) {
				code.classList.remove("active");
			}
		}

		
		
	</script>
}