import React from "react";
import {
  useCurrentFrame,
  useVideoConfig,
  AbsoluteFill,
  interpolate,
  Easing,
} from "remotion";
import type { RemotionScene } from "../Root";
import { THEMES } from "../base/theme/colors";
import { Background } from "../base/components/background";
import { SubtitleBar } from "../base/components/subtitle-bar";
import { AnimatedText } from "../base/components/animated-text";
import { Watermark } from "../base/components/watermark";
import { StepIndicator } from "./components/step-indicator";
import { KeyPointCard } from "./components/key-point-card";

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

const KnowledgeScene: React.FC<KnowledgeSceneProps> = ({
  scene,
  sceneIndex,
  totalScenes,
  totalFrames,
  title,
  channelName,
}) => {
  const frame = useCurrentFrame();
  const colors = THEMES.knowledge;
  const visualText = scene.displayText ?? scene.narration;

  const fadeOpacity = interpolate(
    frame,
    [0, 10, scene.endFrame - scene.startFrame - 10, scene.endFrame - scene.startFrame],
    [0, 1, 1, 0],
    { extrapolateLeft: "clamp", extrapolateRight: "clamp" }
  );

  return (
    <AbsoluteFill style={{ opacity: fadeOpacity }}>
      <Background
        colors={colors}
        sceneIndex={sceneIndex}
        totalScenes={totalScenes}
      />

      {/* Step indicator */}
      <div
        style={{
          position: "absolute",
          top: 48,
          left: 80,
        }}
      >
        <StepIndicator
          currentStep={sceneIndex}
          totalSteps={totalScenes}
          color={colors.primaryLight}
        />
      </div>

      {/* Title label */}
      <div
        style={{
          position: "absolute",
          top: 48,
          right: 80,
          fontSize: 18,
          color: "#94a3b8",
          fontFamily: "Noto Sans SC",
        }}
      >
        {title}
      </div>

      {/* Content */}
      <div
        style={{
          position: "absolute",
          top: 120,
          left: 80,
          right: 80,
          bottom: 160,
          display: "flex",
          flexDirection: "column",
          justifyContent: "center",
          gap: 32,
          overflow: "hidden",
        }}
      >
        <AnimatedText
          text={visualText}
          fontSize={44}
          color="white"
          fontWeight={600}
          delay={5}
        />

        {scene.keyframes.length > 0 && (
          <KeyPointCard
            points={scene.keyframes
              .filter((kf) => kf.type === "text" || kf.type === "highlight")
              .map((kf) => kf.content)}
            color={colors.primaryLight}
          />
        )}
      </div>

      {scene.wordTimestamps.length > 0 && (
        <SubtitleBar wordTimestamps={scene.wordTimestamps} />
      )}

      <Watermark text={channelName} />
    </AbsoluteFill>
  );
};

export default KnowledgeScene;