package templates

import "strconv"

// HomePage is the landing page: the 90-second read.
templ HomePage(v HomeView) {
	@Layout(v.Layout) {
		<section class="hero">
			<p class="hero-kicker">Melbourne · twenty-five years · AI · platform · edge</p>
			<h1 class="hero-title">{ v.Positioning }</h1>
			<p class="hero-support">{ v.Support }</p>
			<p class="hero-facts">
				<span>{ strconv.Itoa(v.Areas) } areas</span>
				<span>{ strconv.Itoa(v.Pages) } pages</span>
				<span>{ strconv.Itoa(v.Artifacts) } linked artefacts</span>
				<span>no page needs a model to render</span>
			</p>
			@SearchForm("", "hero-search")
		</section>
		<section class="pillars" aria-label="Six areas">
			for _, c := range v.Cards {
				@PillarCard(c)
			}
		</section>
	}
}

// DocPage renders an L1, L2 or L3 document.
templ DocPage(v DocView) {
	@Layout(v.Layout) {
		<article class="doc">
			<header class="doc-head">
				<h1 class="doc-title">{ v.Doc.Title }</h1>
				<p class="doc-claim">{ v.Doc.Claim }</p>
				<div class="doc-chips">
					<span class={ ConfidenceClass(v.Doc.Confidence) }>{ v.Doc.Confidence }</span>
					if v.Doc.Period != "" {
						<span class="chip chip-plain">{ v.Doc.Period }</span>
					}
					for _, m := range v.Metrics {
						<span class="chip">
							<strong>{ m.Value }</strong>
							<span>{ m.Label }</span>
						</span>
					}
				</div>
				if len(v.Tech) > 0 {
					@TechChips(v.Tech)
				}
			</header>
			<div class="prose">
				@v.Body
			</div>

			// Level 1 is one screen: the claim, the figures, the technology and the
			// link in the prose. The evidence table starts at level 2, which is the
			// page that argues for the claim.
			if v.Doc.Level >= 2 && (len(v.Evidence) > 0 || len(v.SubPages) > 0) {
				<section class="doc-evidence" aria-labelledby="evidence-heading">
					<h2 id="evidence-heading">Artefacts</h2>
					if len(v.Evidence) > 0 {
						@EvidenceTable(evidenceRows(v.Evidence))
					}
					if len(v.SubPages) > 0 {
						<ul class="drill-list">
							for _, s := range v.SubPages {
								<li>
									<a href={ templ.SafeURL(s.Href) }>{ s.Label }</a>
									<span class="drill-kind">{ s.Kind }</span>
								</li>
							}
						</ul>
					}
				</section>
			}

			if v.Doc.Level == 2 && len(v.Timeline) > 0 {
				<section class="doc-timeline" aria-labelledby="timeline-heading">
					<h2 id="timeline-heading">In time order</h2>
					@Timeline(v.Timeline)
				</section>
			}

			if len(v.Backlinks) > 0 {
				<section class="doc-back" aria-labelledby="back-heading">
					<h2 id="back-heading">Referenced from</h2>
					<ul class="drill-list">
						for _, b := range v.Backlinks {
							<li><a href={ templ.SafeURL(b.Href) }>{ b.Label }</a></li>
						}
					</ul>
				</section>
			}
			<footer class="doc-foot">
				<p>Last verified { v.Doc.LastVerified } · <code>content/{ v.Doc.Path }</code></p>
			</footer>
		</article>
	}
}

// EvidencePage is one page listing every artefact, grouped by area. It is the
// shortest path from the landing page to any proof.
templ EvidencePage(v EvidenceView) {
	@Layout(v.Layout) {
		<article class="doc">
			<header class="doc-head">
				<p class="doc-kicker">Index</p>
				<h1>Evidence index</h1>
				<p class="doc-claim">Every artefact this site claims, on one page. { strconv.Itoa(v.Total) } links, each one a file in the repository.</p>
			</header>
			for _, g := range v.Groups {
				<section class="evidence-group">
					<h2><a href={ templ.SafeURL(g.Href) }>{ g.AreaTitle }</a></h2>
					@EvidenceTable(g.Rows)
				</section>
			}
		</article>
	}
}

// SearchPage is the keyword search. The results block is swapped by HTMX on the
// same page; with JavaScript off the form simply reloads the page.
templ SearchPage(v SearchView) {
	@Layout(v.Layout) {
		<article class="doc">
			<header class="doc-head">
				<p class="doc-kicker">Keyword search</p>
				<h1>Search { strconv.Itoa(v.Indexed) } pages</h1>
				<p class="doc-claim">Full-text search over page titles and body text. Served from a local index — no model, no network call.</p>
			</header>
			@SearchFormLive(v.Query, "page-search")
			@SearchResults(v)
		</article>
	}
}

// SearchResults is the results block as a page element: the live region wrapper
// plus its contents, which is what the whole page renders. Without JavaScript the
// form reloads the page and this markup arrives in the document.
templ SearchResults(v SearchView) {
	<div id="search-results" aria-live="polite">
		@SearchResultsBody(v)
	</div>
}

// SearchResultsBody is the results block without the live region. This is what an
// htmx request returns: the search page's form swaps it into #search-results with
// innerHTML, so returning the wrapper too would nest a second element with the
// same id inside the first and make the live region announce twice.
//
// Everything here arrives inside the polite live region, and the count carries
// role="status" on top of that, so the number is read as one utterance instead of
// a run of result titles.
templ SearchResultsBody(v SearchView) {
	if v.Query == "" {
		<p class="search-empty">Type one or two words above and press Enter. Good starting points: “zigbee”, “signage”, “routing”, “backups”, “guardrails”.</p>
	} else if v.Failed {
		<p class="search-empty">That query could not be run. Try fewer or simpler words.</p>
	} else if len(v.Results) == 0 {
		<p class="search-empty">Nothing found for <q>{ v.Query }</q>. Try a shorter or more general word, or browse an area:</p>
		@searchAreaLinks(v.Areas)
	} else {
		<p class="search-count" role="status">{ strconv.Itoa(len(v.Results)) } results for <q>{ v.Query }</q></p>
		<ol class="results">
			for _, r := range v.Results {
				<li class="result">
					<h2><a href={ templ.SafeURL(r.URL) }>{ r.Title }</a></h2>
					<p class="result-meta">
						<span class="kind">{ r.Area }</span>
						<span class="kind">L{ strconv.Itoa(r.Level) }</span>
						<span class={ ConfidenceClass(r.Confidence) }>{ r.Confidence }</span>
					</p>
					<p class="result-snippet">@SafeSnippet(r.Snippet)
</p>
				</li>
			}
		</ol>
	}
}

// searchAreaLinks is the way out of an empty result: the six areas plus the
// evidence index, so a failed search never leaves the reader at a dead end.
templ searchAreaLinks(areas []LinkView) {
	<ul class="search-areas">
		for _, a := range areas {
			<li><a href={ templ.SafeURL(a.Href) }>{ a.Label }</a></li>
		}
		<li><a href="/evidence/">Evidence index</a></li>
	</ul>
}

// StreamPage proves the panel can be re-pointed at a stream. The layout and the
// panel markup are the ones every other page uses; only the binding differs.
templ StreamPage(v StreamView) {
	@Layout(v.Layout) {
		<article class="doc">
			<header class="doc-head">
				<p class="doc-kicker">Design note · not a product feature</p>
				<h1>The panel takes content from a driver</h1>
				<p class="doc-claim">This page renders the same layout and the same panel as every other page. Its panel is bound to an event stream instead of pre-rendered files, and no layout code changed.</p>
			</header>
			<div class="prose">
				<p>
					The presentation panel is a content sink. In Mode A it takes pre-rendered fragments over
					HTMX: you click a row in an evidence table and one file is swapped in. On this page the same
					panel is bound to <code>/api/stage/stream</code> and receives { strconv.Itoa(v.Frames) } fragments
					over server-sent events, one after another.
				</p>
				<p>
					Fragments are pushed, not requested. Nothing about the panel — its markup, its fragment
					view, its empty state — knows the difference. That is the point: the Phase 5 console
					re-points this panel at retrieval output and the layout does not change.
				</p>
				<p class="section-note">
					This demonstration streams the artefacts already built for the site, with
					no model in the loop. It exists to prove the transport, not to pretend an AI is answering.
				</p>
			</div>
			if len(v.Fragment) > 0 {
				<section class="doc-sub">
					<h2>Fragments in this stream</h2>
					<ul class="drill-list">
						for _, f := range v.Fragment {
							<li>
								<a href={ templ.SafeURL(f.Href) } hx-get={ f.HXGet } hx-target="#stage-content" hx-swap="innerHTML">{ f.Label }</a>
								<span class="drill-kind">{ f.Kind }</span>
							</li>
						}
					</ul>
				</section>
			}
		</article>
	}
}

// NotFoundPage is the 404.
templ NotFoundPage(v NotFoundView) {
	@Layout(v.Layout) {
		<article class="doc">
			<header class="doc-head">
				<p class="doc-kicker">404</p>
				<h1>That page is not here</h1>
				<p class="doc-claim">The link may be from an older build. The six areas and the evidence index are the reliable ways in.</p>
			</header>
			<ul class="drill-list">
				<li><a href="/">Landing page</a></li>
				<li><a href="/evidence/">Evidence index</a></li>
				<li><a href="/search">Search</a></li>
			</ul>
		</article>
	}
}

func evidenceRows(links []LinkView) []EvidenceRow {
	rows := make([]EvidenceRow, 0, len(links))
	for _, l := range links {
		rows = append(rows, EvidenceRow{Label: l.Label, Href: l.Href, HXGet: l.HXGet, Kind: l.Kind, Confidence: l.Confidence})
	}
	return rows
}