import type { VideoLessonPlan } from "@/lib/video/videoLessonPlanner";

type VideoLessonPreviewProps = {
  plan: VideoLessonPlan;
};

function Metric({ label, value }: { label: string; value: string | number }) {
  return (
    <div className="rounded-lg border border-[#2A2A2A] bg-[#050505] p-3">
      <p className="text-[10px] font-semibold uppercase tracking-[0.14em] text-[#6B7280]">{label}</p>
      <p className="mt-1 text-[16px] font-bold text-white">{value}</p>
    </div>
  );
}

function SectionLabel({ children }: { children: React.ReactNode }) {
  return <p className="text-[11px] font-semibold uppercase tracking-[0.14em] text-[#6B7280]">{children}</p>;
}

function sceneTypeLabel(sceneType: string): string {
  const labels: Record<string, string> = {
    intro: "class intro",
    session_plan: "session plan",
    teacher_explanation: "tutor explanation",
    board_drawing: "board drawing",
    worked_example: "worked example",
    method: "DocDoe method",
    notes: "notebook notes",
    exam_answer: "exam answer",
    practice_pause: "practice pause",
    quiz: "quiz",
    revision: "revision",
    outro: "class finish",
  };
  return labels[sceneType] ?? sceneType.replace(/_/g, " ");
}

function voiceStyleLabel(style: string): string {
  const labels: Record<string, string> = {
    calm_teacher: "calm tutor",
    exam_coach: "exam coach",
    quick_revision: "quick revision",
  };
  return labels[style] ?? style.replace(/_/g, " ");
}

export function VideoLessonPreview({ plan }: VideoLessonPreviewProps) {
  const narrationPreview = plan.audioScript.slice(0, 2);
  const boardPreview = plan.boardTimeline.slice(0, 3);
  const notebookPreview = plan.notebookSections.slice(0, 2);
  const practicePreview = plan.practicePauses.slice(0, 2);

  return (
    <section
      aria-label="Video lesson plan preview"
      className="rounded-xl border border-[#2A2A2A] bg-[#0B0B0B] p-4 md:p-5"
      data-testid="video-lesson-preview"
    >
      <div className="flex flex-wrap items-start justify-between gap-3">
        <div className="min-w-0">
          <p className="text-[11px] font-semibold uppercase tracking-[0.16em] text-[#6B7280]">Audio/video preview</p>
          <h3 className="mt-1 text-xl font-bold tracking-tight text-white">{plan.missionTitle}</h3>
          <p className="mt-2 max-w-2xl text-[13px] leading-6 text-[#A1A1AA]">
            Video renderer coming later; this is today&apos;s lesson plan. No MP4 or generated video is created here.
          </p>
        </div>
        <span className="rounded-full border border-white/15 bg-white px-3 py-1 text-[11px] font-black uppercase tracking-[0.12em] text-black">
          Renderer coming later
        </span>
      </div>

      <div className="mt-4 grid gap-3 sm:grid-cols-3">
        <Metric label="Duration" value={`${plan.estimatedDurationMinutes} min`} />
        <Metric label="Scenes" value={plan.scenes.length} />
        <Metric label="Status" value={plan.renderStatus.replace("_", " ")} />
      </div>

      {plan.warnings.length > 0 ? (
        <div className="mt-4 rounded-lg border border-[#3A3A3A] bg-[#111111] p-3">
          <SectionLabel>Planner warnings</SectionLabel>
          <ul className="mt-2 space-y-1 text-[12px] leading-5 text-[#D4D4D8]">
            {plan.warnings.map((warning) => (
              <li key={warning}>{warning}</li>
            ))}
          </ul>
        </div>
      ) : null}

      <div className="mt-5 grid gap-4 xl:grid-cols-[minmax(0,1.15fr)_minmax(0,0.85fr)]">
        <div className="space-y-4">
          <div data-testid="video-scene-timeline">
            <SectionLabel>Lesson timeline</SectionLabel>
            <ol className="mt-3 space-y-2">
              {plan.scenes.slice(0, 8).map((scene) => (
                <li key={scene.id} className="rounded-lg border border-[#2A2A2A] bg-[#111111] p-3">
                  <div className="flex flex-wrap items-center justify-between gap-2">
                    <p className="text-[13px] font-semibold text-white">{scene.title}</p>
                    <span className="font-mono text-[11px] text-[#A1A1AA]">
                      {scene.startMinute}-{scene.startMinute + scene.durationMinutes} min
                    </span>
                  </div>
                  <p className="mt-1 text-[11px] uppercase tracking-[0.12em] text-[#6B7280]">{sceneTypeLabel(scene.sceneType)}</p>
                  <p className="mt-2 line-clamp-2 text-[12px] leading-5 text-[#D4D4D8]">{scene.narration[0]}</p>
                </li>
              ))}
            </ol>
          </div>

          <div data-testid="video-board-timeline">
            <SectionLabel>Board drawing</SectionLabel>
            <div className="mt-3 grid gap-3 md:grid-cols-2">
              {boardPreview.map((frame) => (
                <article key={frame.id} className="rounded-lg border border-[#2A2A2A] bg-[#111111] p-3">
                  <p className="text-[13px] font-semibold text-white">{frame.frameTitle}</p>
                  <p className="mt-1 font-mono text-[11px] text-[#A1A1AA]">at {frame.timestampMinute} min</p>
                  <ul className="mt-3 space-y-1 text-[12px] leading-5 text-[#D4D4D8]">
                    {frame.drawingSteps.slice(0, 3).map((step) => (
                      <li key={step}>{step}</li>
                    ))}
                  </ul>
                </article>
              ))}
            </div>
          </div>
        </div>

        <div className="space-y-4">
          <div className="rounded-lg border border-[#2A2A2A] bg-[#111111] p-3" data-testid="video-narration-preview">
            <SectionLabel>Tutor explanation</SectionLabel>
            <div className="mt-3 space-y-3">
              {narrationPreview.map((block) => (
                <div key={block.sceneId} className="rounded-lg border border-white/[0.07] bg-white/[0.035] p-3">
                  <p className="text-[11px] font-semibold uppercase tracking-[0.12em] text-[#6B7280]">{voiceStyleLabel(block.voiceStyle)}</p>
                  <p className="mt-2 line-clamp-4 text-[12px] leading-5 text-white">{block.script}</p>
                </div>
              ))}
            </div>
          </div>

          <div className="rounded-lg border border-[#2A2A2A] bg-[#111111] p-3" data-testid="video-notebook-preview">
            <SectionLabel>Copy this to notebook</SectionLabel>
            <div className="mt-3 space-y-3">
              {notebookPreview.map((section) => (
                <div key={`${section.sceneId}-${section.title}`}>
                  <p className="text-[13px] font-semibold text-white">{section.title}</p>
                  <ul className="mt-2 space-y-1 text-[12px] leading-5 text-[#D4D4D8]">
                    {section.copyToNotebook.slice(0, 3).map((line) => (
                      <li key={line}>{line}</li>
                    ))}
                  </ul>
                </div>
              ))}
            </div>
          </div>

          <div className="rounded-lg border border-[#2A2A2A] bg-[#111111] p-3" data-testid="video-practice-preview">
            <SectionLabel>Notice this</SectionLabel>
            <div className="mt-3 space-y-3">
              {practicePreview.map((pause) => (
                <div key={pause.sceneId} className="rounded-lg border border-dashed border-[#3A3A3A] bg-[#0B0B0B] p-3">
                  <p className="text-[12px] font-semibold leading-5 text-white">{pause.prompt}</p>
                  <p className="mt-1 text-[11px] text-[#A1A1AA]">Pause: {pause.pauseSeconds} sec</p>
                  <p className="mt-2 text-[12px] leading-5 text-[#D4D4D8]">Hint: {pause.hint}</p>
                </div>
              ))}
            </div>
          </div>
        </div>
      </div>
    </section>
  );
}