// SPDX-License-Identifier: AGPL-3.0-or-later

package web

// Tree is a directory as a tree: the file finder on top, then the entries
// with their last commit, and the notes on what is left out. A directory opens
// in place (files.js); the keyboard walks the rows (j k l h, the arrows).
templ Tree(l Layout, p TreePage) {
	@Shell(l, nil) {
		<div class="tree-find">
			<div class="filter wide">
				<label for="finder-q" class="sr">find a file</label>
				<input
					id="finder-q"
					type="search"
					data-filter
					role="combobox"
					aria-autocomplete="list"
					aria-controls="finder-list"
					aria-expanded="false"
					placeholder="Find a file in this repository…"
					autocomplete="off"
					spellcheck="false"
					hx-on:focus="ermiteFinder.load()"
					hx-on:input="ermiteFinder.input(this)"
					hx-on:keydown="ermiteFinder.key(this, event)"
				/>
			</div>
			<p class="tree-keys" data-js aria-hidden="true"><kbd>j</kbd> <kbd>k</kbd> move · <kbd>l</kbd> open · <kbd>h</kbd> back</p>
		</div>
		<p id="finder-status" class="dim" role="status"></p>
		<div id="finder" class="tree-card" hidden>
			<ul id="finder-list" class="cmd-list" role="listbox" aria-label="Files"></ul>
		</div>
		<div id="tree-view" class="tree-card">
			<div class="tree-head">
				<span class="tree-path">{ p.Path }</span>
				if p.Up != "" {
					<a class="tree-up" href={ templ.SafeURL(p.Up) } title="parent directory (h)">..</a>
				}
				<span class="tree-count">{ itoa(len(p.Rows)) } { p.Unit() }</span>
			</div>
			<ul
				id="tree-rows"
				class="tree"
				role="tree"
				aria-label="Entries"
				data-rows
				data-tree
				if p.Up != "" {
					data-up={ p.Up }
				}
				hx-on:click="ermiteTree.click(event)"
			>
				@TreeRows(p)
			</ul>
			if len(p.Rows) == 0 {
				<p class="lede dim">this directory is empty.</p>
			}
			for _, n := range p.Notes {
				<p class="note">{ n }</p>
			}
		</div>
	}
}

// TreeRows is the rows of a directory alone: what files.js inserts under a
// directory it opens in place. When the directory has more entries than are
// listed, the last row links to its page.
templ TreeRows(p TreePage) {
	for _, r := range p.Rows {
		@TreeRowView(r)
	}
	if p.More != "" {
		<li class="tree-more" role="treeitem" aria-level="1" aria-posinset={ itoa(p.MorePos) } aria-setsize="-1" data-depth="0">
			<span class="t-main">
				<span class="t-twig" aria-hidden="true"></span>
				<span class="t-node" aria-hidden="true"></span>
				<a class="t-name" href={ templ.SafeURL(p.More) }>more entries: open the directory</a>
			</span>
		</li>
	}
}

// TreeRowView is one entry of a directory, a row of the tree: the guides of
// its depth (t-twig), its node, its name, then its last commit. A directory
// carries data-expand, the URL of its rows, and aria-expanded; files.js sets
// the depth of the rows it inserts (data-depth, --depth, aria-level).
// aria-posinset and aria-setsize count the entries of the row's own directory
// (setsize -1: the listing is cut and the total unknown), so the positions
// stay right once the rows of a directory are inserted into the flat list. The
// node is drawn by the stylesheet from data-kind, which is aria-hidden: the
// type of a directory, a link or a submodule is said in text for screen readers
// (the .sr span, part of the name of the treeitem) and in a tooltip.
templ TreeRowView(r TreeRow) {
	<li
		role="treeitem"
		aria-level="1"
		aria-posinset={ itoa(r.Pos) }
		aria-setsize={ itoa(r.Set) }
		data-kind={ r.Kind }
		data-depth="0"
		data-cursor?={ r.Cursor }
		if r.Expand != "" {
			data-expand={ r.Expand }
			aria-expanded="false"
		}
	>
		<span class="t-main">
			<span class="t-twig" aria-hidden="true"></span>
			<span class="t-node" aria-hidden="true"></span>
			if r.Href != "" {
				<a
					class="t-name"
					href={ templ.SafeURL(r.Href) }
					if r.Hint != "" {
						title={ r.Hint }
					}
				>{ r.Name }</a>
			} else {
				<span
					class="t-name"
					if r.Hint != "" {
						title={ r.Hint }
					}
				>{ r.Name }</span>
			}
			if r.Hint != "" {
				<span class="sr">{ " (" + r.Hint + ")" }</span>
			}
		</span>
		<span class="t-size">{ r.Size }</span>
		<span class="t-sub">
			if r.CHref != "" {
				<a class="t-commit" href={ templ.SafeURL(r.CHref) } title={ r.Author }>{ r.Subject }</a>
			}
		</span>
		<span class="t-when">
			if r.WhenAt != "" {
				<time datetime={ r.WhenAt } title={ r.WhenAt }>{ r.When }</time>
			}
		</span>
	</li>
}