import React from "react";
import {
  useCurrentFrame,
  useVideoConfig,
  AbsoluteFill,
  Img,
  staticFile,
  interpolate,
} from "remotion";
import type { RemotionScene } from "../Root";
import type { RenderSegmentExtension } from "@pipeline/shared";
import { GITHUB_DAILY_PICK_PALETTE } from "../base/theme/colors";
import { SubtitleBar } from "../base/components/subtitle-bar";
import { Watermark } from "../base/components/watermark";
import { formatCount } from "@pipeline/shared";
import { ColorDot } from "../github-trending/index";

interface GithubDailyPickSceneProps {
  scene: RemotionScene;
  sceneIndex: number;
  totalScenes: number;
  totalFrames: number;
  title: string;
  channelName?: string;
}

/** Dark-stage tag chip — the deep-dive board keeps the dark look, so it can't
 *  reuse github-trending's (now light) Tag. Dark glass chip, light accent. */
const Tag: React.FC<{ accent: string; children: React.ReactNode; size?: "default" | "large" }> = ({ accent, children, size = "default" }) => (
  <div style={{
    display: "inline-flex",
    alignItems: "center",
    gap: 10,
    padding: "12px 24px",
    borderRadius: 10,
    background: "rgba(255,255,255,0.08)",
    border: `1px solid ${accent}55`,
    color: "white",
    fontFamily: "Noto Sans SC",
    fontSize: size === "large" ? 32 : 28,
    fontWeight: 500,
    backdropFilter: "blur(4px)",
  }}>
    {children}
  </div>
);

/**
 * github-daily-pick content scene — one ACT chapter of the day's six-act
 * recommendation (钩子/痛点/亮相/亮点/上手/总结). Unlike the board templates (headline = repo fullName), here the scene
 * title is the act ("快速上手"), the repo identity moves to a
 * compact sub-line, and the body is the scene's keyframe cards plus the repo's
 * social preview. A top-right progress badge (03 / 07) reinforces the
 * deep-dive chapter structure.
 */
const GithubDailyPickScene: React.FC<GithubDailyPickSceneProps> = ({
  scene,
  sceneIndex,
  totalScenes,
  channelName,
}) => {
  const frame = useCurrentFrame();
  const { width, height, durationInFrames } = useVideoConfig();
  const isPortrait = height > width;
  const palette = GITHUB_DAILY_PICK_PALETTE[sceneIndex % GITHUB_DAILY_PICK_PALETTE.length];
  const github: RenderSegmentExtension | undefined =
    scene.extension?.type === "github-daily-pick" ? scene.extension : undefined;

  const sceneDur = durationInFrames;
  const fadeOpacity = interpolate(
    frame,
    [0, 8, sceneDur - 8, sceneDur],
    [0, 1, 1, 0],
    { extrapolateLeft: "clamp", extrapolateRight: "clamp" }
  );

  const socialPreview = github?.images?.socialPreview;
  const starHistory = github?.images?.starHistory;

  const pad = isPortrait ? 48 : 80;
  const footerReserved = isPortrait ? 500 : 140;

  const repo = github?.repo;
  const language = repo?.language || "";
  const languageColor = repo?.languageColor || palette.accent;
  const starsLabel = repo?.stars != null ? `${formatCount(repo.stars)} stars` : "";
  const license = repo?.license || "";
  const fullName = repo?.fullName || "";

  if (!github) {
    return (
      <AbsoluteFill style={{ opacity: fadeOpacity, background: `linear-gradient(135deg, ${palette.from} 0%, ${palette.to} 100%)` }}>
        <div style={{
          position: "absolute", inset: 0, display: "flex",
          alignItems: "center", justifyContent: "center", padding: pad,
        }}>
          <div style={{ fontSize: 48, fontWeight: 700, color: "white", fontFamily: "Noto Sans SC", textAlign: "center" }}>
            {scene.title || scene.captionOrigin}
          </div>
        </div>
        {(scene.caption?.length ?? 0) > 0 && <SubtitleBar caption={scene.caption} />}
        <Watermark text={channelName} />
      </AbsoluteFill>
    );
  }

  // The scene's cards, ordered as produced. Card kinds are free-form strings
  // (功能简介 / 快速上手 / 对比 / 安装 ...); shown as titled sections.
  const cards = (scene.cardList ?? []).filter((c) => (c.desc ?? "").trim());
  const badge = `${String(sceneIndex + 1).padStart(2, "0")} / ${String(totalScenes).padStart(2, "0")}`;

  const renderHeader = (fontSize: number, tagSize: "default" | "large", dotSize: number) => (
    <div>
      {/* Aspect title — the chapter headline (from displayText) */}
      <div style={{
        fontSize,
        fontWeight: 800,
        color: "white",
        fontFamily: "Noto Sans SC",
        lineHeight: 1.15,
        letterSpacing: "-0.01em",
      }}>
        {scene.title || fullName}
      </div>
      {/* Repo identity — compact sub-line under the act title */}
      <div style={{
        display: "flex", flexWrap: "wrap", alignItems: "center", gap: 16, marginTop: 16,
      }}>
        <span style={{
          fontSize: tagSize === "large" ? 36 : 30, fontWeight: 600,
          color: "rgba(255,255,255,0.72)", fontFamily: "Noto Sans SC",
        }}>
          {fullName}
        </span>
        {language && (
          <Tag accent={palette.accent} size={tagSize}>
            <ColorDot color={languageColor} size={dotSize} />
            {language}
          </Tag>
        )}
        {starsLabel && <Tag accent={palette.accent} size={tagSize}>{starsLabel}</Tag>}
        {license && <Tag accent={palette.accent} size={tagSize}>{license}</Tag>}
      </div>
    </div>
  );

  const renderBadge = (scale: number) => (
    <div style={{
      display: "flex", alignItems: "center", gap: 10,
      padding: "12px 26px", borderRadius: 12,
      background: "rgba(0,0,0,0.35)",
      border: `1px solid ${palette.accent}66`,
      fontFamily: "Noto Sans SC",
      backdropFilter: "blur(4px)",
    }}>
      <span style={{ fontSize: 30 * scale, fontWeight: 700, color: palette.accent }}>
        {String(sceneIndex + 1).padStart(2, "0")}
      </span>
      <span style={{ fontSize: 22 * scale, fontWeight: 500, color: "rgba(255,255,255,0.55)" }}>
        / {String(totalScenes).padStart(2, "0")}
      </span>
    </div>
  );

  const cardsRow = (size: "default" | "large") => (
    <div style={{
      flex: 1, display: "flex", flexDirection: "column", gap: 20, minHeight: 0,
    }}>
      {cards.slice(0, size === "large" ? 2 : 3).map((card, i) => (
        <AspectSection
          key={i}
          title={card.kind || "要点"}
          accent={palette.accent}
          body={card.desc ?? ""}
          size={size}
        />
      ))}
    </div>
  );

  return (
    <AbsoluteFill style={{
      opacity: fadeOpacity,
      background: `linear-gradient(135deg, ${palette.from} 0%, ${palette.to} 100%)`,
    }}>
      {/* Subtle grid overlay (matches other templates' aesthetic) */}
      <div style={{
        position: "absolute", inset: 0,
        backgroundImage: `
          linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
          linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px)
        `,
        backgroundSize: "80px 80px",
      }} />

      {/* Top accent line */}
      <div style={{
        position: "absolute", top: 0, left: 0, width: "100%", height: 4,
        background: `linear-gradient(90deg, ${palette.accent}, ${palette.accent}88)`,
      }} />

      {isPortrait ? (
        <div style={{
          position: "relative",
          display: "flex",
          flexDirection: "column",
          width: "100%",
          height: "100%",
          boxSizing: "border-box",
          padding: `${pad}px ${pad}px ${footerReserved}px`,
        }}>
          <div style={{ display: "flex", alignItems: "flex-start", justifyContent: "space-between", gap: 20 }}>
            <div style={{ flex: 1, minWidth: 0 }}>{renderHeader(84, "large", 16)}</div>
            {renderBadge(0.9)}
          </div>
          <div style={{ height: 1, background: "rgba(255,255,255,0.18)", marginTop: 22 }} />
          <div style={{
            flex: 1, display: "flex", flexDirection: "column", gap: 24, paddingTop: 22, minHeight: 0,
          }}>
            {socialPreview && (
              <ImageFrame>
                <Img src={staticFile(socialPreview.filename)} style={{ display: "block", width: "100%", height: "auto" }} />
              </ImageFrame>
            )}
            {cardsRow("large")}
          </div>
        </div>
      ) : (
        <>
          <div style={{
            position: "absolute",
            top: pad,
            left: pad,
            right: pad,
            display: "flex",
            alignItems: "flex-start",
            justifyContent: "space-between",
            gap: 24,
          }}>
            <div style={{ flex: 1, minWidth: 0 }}>{renderHeader(64, "default", 14)}</div>
            {renderBadge(1)}
          </div>

          <div style={{
            position: "absolute",
            top: pad + 150,
            left: pad,
            right: pad,
            height: 1,
            background: "rgba(255,255,255,0.18)",
          }} />

          <div style={{
            position: "absolute",
            top: pad + 174,
            left: pad,
            right: pad,
            bottom: footerReserved,
            display: "flex",
            gap: 40,
          }}>
            {socialPreview && (
              <div style={{
                width: "38%",
                display: "flex",
                flexDirection: "column",
                gap: 20,
                overflow: "hidden",
              }}>
                <ImageFrame>
                  <Img src={staticFile(socialPreview.filename)} style={{ display: "block", width: "100%", height: "auto" }} />
                </ImageFrame>
                {starHistory && (
                  <ImageFrame>
                    <Img src={staticFile(starHistory.filename)} style={{ display: "block", width: "100%", height: "auto" }} />
                  </ImageFrame>
                )}
              </div>
            )}
            {cardsRow("default")}
          </div>
        </>
      )}

      {(scene.caption?.length ?? 0) > 0 && (
        <SubtitleBar
          caption={scene.caption}
          style={isPortrait ? { bottom: 380 } : undefined}
          fontSize={isPortrait ? 56 : undefined}
        />
      )}
      <Watermark text={channelName} />
    </AbsoluteFill>
  );
};

const ImageFrame: React.FC<{ children: React.ReactNode }> = ({ children }) => (
  <div style={{
    width: "100%",
    height: "auto",
    background: "#0b1220",
    border: "1px solid rgba(255,255,255,0.10)",
    borderRadius: 16,
    overflow: "hidden",
    display: "flex",
    alignItems: "center",
    justifyContent: "center",
    boxShadow: "0 12px 32px rgba(0,0,0,0.45), 0 2px 8px rgba(0,0,0,0.35)",
  }}>
    {children}
  </div>
);

const AspectSection: React.FC<{
  title: string;
  accent: string;
  body: string;
  size?: "default" | "large";
}> = ({ title, accent, body, size = "default" }) => {
  const isLarge = size === "large";
  const cleanBody = (body ?? "").replace(/[。，、,.;；:：\s]+$/, "");
  return (
    <div style={{
      flex: 1,
      background: "rgba(255,255,255,0.05)",
      border: "1px solid rgba(255,255,255,0.10)",
      borderRadius: 12,
      padding: isLarge ? "24px 32px" : "22px 28px",
      display: "flex",
      flexDirection: "column",
      gap: 12,
      minHeight: 0,
    }}>
      <div style={{ display: "flex", alignItems: "center", gap: 12 }}>
        <span style={{
          display: "inline-block",
          width: isLarge ? 6 : 5,
          height: isLarge ? 32 : 26,
          background: accent,
          borderRadius: 2,
        }} />
        <span style={{
          fontSize: isLarge ? 34 : 28,
          fontWeight: 700,
          color: accent,
          fontFamily: "Noto Sans SC",
          letterSpacing: "0.04em",
        }}>
          {title}
        </span>
      </div>
      <div style={{
        flex: "0 0 auto",
        fontSize: isLarge ? 52 : 32,
        lineHeight: isLarge ? 1.35 : 1.4,
        color: "white",
        fontFamily: "Noto Sans SC",
        fontWeight: 400,
        display: "-webkit-box",
        WebkitLineClamp: isLarge ? 3 : 4,
        WebkitBoxOrient: "vertical",
        overflow: "hidden",
        overflowWrap: "break-word",
      }}>
        {cleanBody}
      </div>
    </div>
  );
};

export default GithubDailyPickScene;