package web

import (
	"fmt"
	"time"

	"git.d-ma.be/mathias/tapir/internal/domain"
	"git.d-ma.be/mathias/tapir/internal/uploads"
)

// UploadsPage is the upload form plus the caller's own uploads (ADR-033).
templ UploadsPage(v uploadsView) {
	@Layout("Tapir — Upload a recording") {
		<article class="account">
			<h1>Upload a recording</h1>
			<p class="muted">
				Audio only. Up to { fmt.Sprintf("%d MB", v.Limits.MaxBytes>>20) } and
				{ uploads.FormatDuration(v.Limits.MaxDuration) }. The transcript is private to you;
				the audio is deleted once it has been transcribed.
			</p>
			if v.Error != "" {
				<div class="flash flash-error" role="alert">{ v.Error }</div>
			}
			<form method="post" action="/uploads" enctype="multipart/form-data">
				<p><label>Title (optional) <input type="text" name="title" maxlength="200"/></label></p>
				<p><input type="file" name="file" accept="audio/*,.m4a,.mp3,.wav,.opus,.ogg,.mp4" required/></p>
				<p><button type="submit">Upload and transcribe</button></p>
			</form>
			if len(v.Rows) > 0 {
				<section>
					<h2>Your recordings</h2>
					<ul>
						for _, u := range v.Rows {
							<li>
								<a href={ templ.SafeURL("/uploads/" + u.ID) }>{ u.Title }</a>
								<span class="chip">{ string(u.Status) }</span>
							</li>
						}
					</ul>
				</section>
			}
		</article>
	}
}

// UploadPage is one upload's page: its title and the polling status region.
templ UploadPage(u domain.UploadedTranscript, chatEnabled bool) {
	@Layout("Tapir — " + u.Title) {
		<article class="account">
			<h1>{ u.Title }</h1>
			@uploadStatus(u, chatEnabled)
			<p><a href="/uploads">All recordings</a></p>
		</article>
	}
}

// uploadStatus is the region HTMX polls. Unfinished states carry hx-trigger so the
// page re-asks; done and failed render without it, so nothing polls forever.
templ uploadStatus(u domain.UploadedTranscript, chatEnabled bool) {
	switch u.Status {
		case domain.UploadDone:
			<div class="upload-status upload-done" role="status">
				@videoNotice(u.HadVideo)
				<p>
					Transcribed { uploads.FormatDuration(time.Duration(u.AudioSeconds * float64(time.Second))) }
					of audio by <span class="chip">{ u.Endpoint }</span>.
				</p>
				if chatEnabled {
					<p><a class="btn" href={ templ.SafeURL("/uploads/" + u.ID + "/chat") }>Ask about this recording</a></p>
				}
				<details open>
					<summary>Transcript</summary>
					<pre class="transcript">{ u.Content }</pre>
				</details>
			</div>
		case domain.UploadFailed:
			<div class="upload-status upload-failed flash flash-error" role="alert">
				@videoNotice(u.HadVideo)
				<p>{ uploadFailureMessage(u.ErrorKind) }</p>
			</div>
		default:
			<div
				class="upload-status upload-working"
				role="status"
				hx-get={ "/uploads/" + u.ID + "/status" }
				hx-trigger={ "every " + uploadPollEvery }
				hx-swap="outerHTML"
			>
				@videoNotice(u.HadVideo)
				if u.Status == domain.UploadTranscribing {
					<p>Transcribing… a long recording takes a few minutes.</p>
				} else {
					<p>Queued — waiting for its turn to be transcribed.</p>
				}
			</div>
	}
}

// UploadChatPage is the no-JS full page for chatting with an uploaded transcript:
// the same chat panel as a video's (ADR-027), scoped to this recording.
templ UploadChatPage(u domain.UploadedTranscript, v chatView) {
	@Layout("Tapir — Ask about " + u.Title) {
		<article class="account">
			<h1>{ u.Title }</h1>
			<section id="chat-section" class="chat-dock chat-dock-open">
				<h2 class="chat-heading">Ask about this recording</h2>
				<p class="chat-scope muted">Answers come only from this recording's transcript, which is private to you.</p>
				@chatPanel(v)
			</section>
			<p><a href={ templ.SafeURL("/uploads/" + u.ID) }>Back to the transcript</a></p>
		</article>
	}
}

// videoNotice tells the user a video track was present and what became of it. A
// Teams meeting with the camera off is still a video file; it is accepted, only the
// audio is transcribed, and the picture is thrown away — so say so, in every state,
// instead of leaving the user to wonder (ADR-033).
templ videoNotice(hadVideo bool) {
	if hadVideo {
		<p class="muted video-notice">
			This file contained a video track. Only its audio was used; the video was discarded and nothing from it was kept.
		</p>
	}
}