'use client';
import React, { useState } from "react";
import Image from "next/image";
import { SimpleCarousel } from "./SimpleCarousel";
import type { HeroData } from "../types";

interface HomeHeroCarouselProps {
  data: HeroData;
}

export function HomeHeroCarousel({ data }: HomeHeroCarouselProps) {
  const { eyebrow, title, subtitle, carousel } = data;
  // 跟踪第一张图片是否已加载完成
  const [isFirstImageLoaded, setIsFirstImageLoaded] = useState(false);

  return (
    <section className="relative overflow-hidden bg-[#f5f7fb] pb-14 pt-10 text-[#0f1f39] md:pb-20 md:pt-16">
      <div className="absolute inset-0">
        <div className="pointer-events-none absolute inset-x-0 top-0 h-[320px] bg-gradient-to-b from-white via-[#f5f7fb] to-transparent opacity-60" />
        <div className="pointer-events-none absolute left-[-120px] top-[-140px] h-[360px] w-[360px] rounded-full bg-[radial-gradient(circle,rgba(17,138,244,0.14)_0%,rgba(17,138,244,0)_70%)] blur-3xl opacity-70" />
      </div>

      <div className="relative mx-auto flex w-full max-w-6xl flex-col items-center gap-6 px-4 text-center md:px-6">
        <div className="max-w-3xl space-y-3">
          {eyebrow && (
            <p className="text-xs font-semibold uppercase tracking-[0.46em] text-[#118af4]">
              {eyebrow}
            </p>
          )}
          <h1 className="text-3xl font-semibold leading-tight text-[#0f1f39] md:text-[40px]">
            {title}
          </h1>
          <p className="text-sm leading-relaxed text-[#4b5565] md:text-base">
            {subtitle}
          </p>
        </div>

        <SimpleCarousel
          items={carousel}
          className="mt-4 h-[360px] w-full max-w-5xl rounded-[28px] bg-white/90 shadow-[0_30px_60px_rgba(15,31,57,0.08)] md:h-[450px] lg:h-[500px]"
          isReady={isFirstImageLoaded}
          renderItem={(item, index) => {
            // 处理第一张图片的加载完成事件
            const handleImageLoad = () => {
              if (index === 0) {
                setIsFirstImageLoaded(true);
              }
            };
            // 如果有文字，根据 layout 决定布局方式
            if (item.text && item.text.length > 0) {
              // 上下布局（上面文字，下面图片）
              if (item.layout === "vertical" && item.imageBottom) {
                return (
                  <div className="flex h-full w-full flex-col overflow-hidden rounded-[28px] border border-[rgba(17,138,244,0.12)] bg-gradient-to-br from-[#f0f9ff] to-[#e4f2ff]">
                    {/* 上面：文字内容 */}
                    <div className="flex flex-1 flex-col justify-center bg-gradient-to-br from-[#f0f9ff] to-[#e4f2ff] p-5 text-[#0f1f39] md:p-6 lg:p-8">
                      {item.title && (
                        <h3 className="mb-2 text-base font-semibold leading-snug text-[#0f1f39] md:mb-3 md:text-lg lg:text-xl break-words">
                          {item.title}
                        </h3>
                      )}
                      <div className="space-y-2 text-xs leading-relaxed text-[#1f2937] md:space-y-2.5 md:text-sm md:leading-relaxed lg:text-base">
                        {item.text.map((paragraph, index) => {
                          // 如果有高亮关键词，渲染带高亮的段落
                          if (item.highlights && item.highlights.length > 0) {
                            let parts: (string | JSX.Element)[] = [paragraph];
                            item.highlights.forEach((highlight, highlightIndex) => {
                              const newParts: (string | JSX.Element)[] = [];
                              parts.forEach((part) => {
                                if (typeof part === 'string') {
                                  const regex = new RegExp(`(${highlight.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')})`, 'gi');
                                  const matches = part.split(regex);
                                  matches.forEach((match, matchIndex) => {
                                    if (matchIndex % 2 === 1) {
                                      newParts.push(
                                        <strong key={`p${index}-h${highlightIndex}-m${matchIndex}`} className="text-[#118af4]">
                                          {match}
                                        </strong>
                                      );
                                    } else if (match) {
                                      newParts.push(match);
                                    }
                                  });
                                } else {
                                  newParts.push(part);
                                }
                              });
                              parts = newParts;
                            });
                            return (
                              <p key={index}>
                                {parts}
                              </p>
                            );
                          }
                          return <p key={index}>{paragraph}</p>;
                        })}
                        {/* 统计信息框 */}
                        {item.stats && (
                          <div className="mt-3 md:mt-4 p-3 md:p-4 rounded-lg bg-gradient-to-br from-[#e8f4fd] to-[#dbeafe] border border-[rgba(17,138,244,0.15)]">
                            {item.highlights && item.highlights.length > 0 ? (() => {
                              let parts: (string | JSX.Element)[] = [item.stats];
                              item.highlights.forEach((highlight, highlightIndex) => {
                                const newParts: (string | JSX.Element)[] = [];
                                parts.forEach((part) => {
                                  if (typeof part === 'string') {
                                    const regex = new RegExp(`(${highlight.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')})`, 'gi');
                                    const matches = part.split(regex);
                                    matches.forEach((match, matchIndex) => {
                                      if (matchIndex % 2 === 1) {
                                        newParts.push(
                                          <strong key={`stats-h${highlightIndex}-m${matchIndex}`} className="text-[#0f1f39]">
                                            {match}
                                          </strong>
                                        );
                                      } else if (match) {
                                        newParts.push(match);
                                      }
                                    });
                                  } else {
                                    newParts.push(part);
                                  }
                                });
                                parts = newParts;
                              });
                              return <p className="text-xs md:text-sm text-[#1f2937] leading-relaxed">{parts}</p>;
                            })() : (
                              <p className="text-xs md:text-sm text-[#1f2937] leading-relaxed">{item.stats}</p>
                            )}
                          </div>
                        )}
                      </div>
                    </div>
                    {/* 下面：图片 */}
                    <div className="relative flex h-[200px] md:h-[250px] w-full items-center justify-center overflow-hidden bg-gradient-to-br from-[#f0f9ff] to-[#e4f2ff]">
                      <Image
                        src={item.imageBottom}
                        alt={item.alt}
                        fill
                        sizes="100vw"
                        className="object-contain"
                        priority={item.id === "hero-5"}
                        onLoad={index === 0 ? handleImageLoad : undefined}
                      />
                    </div>
                  </div>
                );
              }
              // 左右布局（左边文字，右边图片）
              return (
                <div className="flex h-full w-full flex-col overflow-hidden rounded-[28px] border border-[rgba(17,138,244,0.12)] bg-gradient-to-br from-[#f0f9ff] to-[#e4f2ff] md:flex-row">
                  {/* 左边：文字内容 */}
                  <div className="flex flex-1 flex-col justify-center bg-gradient-to-br from-[#f0f9ff] to-[#e4f2ff] p-5 text-[#0f1f39] md:p-6 lg:p-8">
                    {item.title && (
                      <h3 className="mb-2 text-base font-semibold leading-snug text-[#0f1f39] md:mb-3 md:text-lg lg:text-xl break-words">
                        {item.title}
                      </h3>
                    )}
                    <div className="space-y-2 text-xs leading-relaxed text-[#1f2937] md:space-y-2.5 md:text-sm md:leading-relaxed lg:text-base">
                      {item.text.map((paragraph, index) => {
                        // 如果有高亮关键词，渲染带高亮的段落
                        if (item.highlights && item.highlights.length > 0) {
                          let parts: (string | JSX.Element)[] = [paragraph];
                          item.highlights.forEach((highlight, highlightIndex) => {
                            const newParts: (string | JSX.Element)[] = [];
                            parts.forEach((part) => {
                              if (typeof part === 'string') {
                                const regex = new RegExp(`(${highlight.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')})`, 'gi');
                                const matches = part.split(regex);
                                matches.forEach((match, matchIndex) => {
                                  if (matchIndex % 2 === 1) {
                                    newParts.push(
                                      <strong key={`p${index}-h${highlightIndex}-m${matchIndex}`} className="text-[#118af4]">
                                        {match}
                                      </strong>
                                    );
                                  } else if (match) {
                                    newParts.push(match);
                                  }
                                });
                              } else {
                                newParts.push(part);
                              }
                            });
                            parts = newParts;
                          });
                          return (
                            <p key={index}>
                              {parts}
                            </p>
                          );
                        }
                        return <p key={index}>{paragraph}</p>;
                      })}
                      {/* 统计信息框 */}
                      {item.stats && (
                        <div className="mt-3 md:mt-4 p-3 md:p-4 rounded-lg bg-gradient-to-br from-[#e8f4fd] to-[#dbeafe] border border-[rgba(17,138,244,0.15)]">
                          {item.highlights && item.highlights.length > 0 ? (() => {
                            let parts: (string | JSX.Element)[] = [item.stats];
                            item.highlights.forEach((highlight) => {
                              const newParts: (string | JSX.Element)[] = [];
                              parts.forEach((part) => {
                                if (typeof part === 'string') {
                                  const regex = new RegExp(`(${highlight.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')})`, 'gi');
                                  const matches = part.split(regex);
                                  matches.forEach((match, matchIndex) => {
                                    if (matchIndex % 2 === 1) {
                                      newParts.push(
                                        <strong key={`stats-${matchIndex}`} className="text-[#0f1f39]">
                                          {match}
                                        </strong>
                                      );
                                    } else if (match) {
                                      newParts.push(match);
                                    }
                                  });
                                } else {
                                  newParts.push(part);
                                }
                              });
                              parts = newParts;
                            });
                            return <p className="text-xs md:text-sm text-[#1f2937] leading-relaxed">{parts}</p>;
                          })() : (
                            <p className="text-xs md:text-sm text-[#1f2937] leading-relaxed">{item.stats}</p>
                          )}
                        </div>
                      )}
                    </div>
                  </div>
                  {/* 右边：图片和 KPI 指标 */}
                  <div className="flex h-full w-full min-h-0 flex-col items-center justify-between bg-gradient-to-br from-[#f0f9ff] to-[#e4f2ff] p-4 md:w-1/2 md:p-6">
                    {/* 图片区域 */}
                    <div className="relative flex flex-1 w-full max-w-[400px] items-center justify-center min-h-0 mb-3 md:mb-4">
                      <div className="h-full w-full flex items-center justify-center bg-gradient-to-br from-[#f0f9ff] to-[#e4f2ff] rounded-lg relative min-h-0">
                        <Image
                          src={item.src}
                          alt={item.alt}
                          fill
                          sizes="(max-width: 768px) 100vw, 400px"
                          className="object-contain"
                          style={{ 
                            mixBlendMode: 'multiply',
                            filter: 'contrast(1.1) brightness(1.02)'
                          }}
                          priority={item.id === "hero-1"}
                          onLoad={index === 0 ? handleImageLoad : undefined}
                        />
                      </div>
                    </div>
                    {/* KPI 指标卡片 */}
                    {item.kpis && item.kpis.length > 0 && (
                      <div className="flex w-full max-w-[400px] gap-2 md:gap-3 flex-shrink-0">
                        {item.kpis.map((kpi, index) => (
                          <div
                            key={index}
                            className="flex-1 rounded-lg bg-gradient-to-br from-[#e8f4fd] to-[#dbeafe] border border-[rgba(17,138,244,0.15)] p-3 md:p-4 text-center shadow-[0_2px_8px_rgba(17,138,244,0.08)]"
                          >
                            <div className="text-lg md:text-xl lg:text-2xl font-bold text-[#0f1f39] mb-1">
                              {kpi.value}
                            </div>
                            <div className="text-xs md:text-sm text-[#4b5565] leading-tight">
                              {kpi.label}
                            </div>
                          </div>
                        ))}
                      </div>
                    )}
                  </div>
                </div>
              );
            }
            // 没有文字，使用原来的全屏图片布局
            return (
              <div className="relative flex h-full w-full items-center justify-center overflow-hidden rounded-[28px] border border-[rgba(17,138,244,0.12)] bg-gradient-to-br from-white via-[#f7faff] to-[#eaf3ff]">
                <Image
                  src={item.src}
                  alt={item.alt}
                  fill
                  sizes="100vw"
                  className="object-cover"
                  priority={item.id === "hero-2"}
                  onLoad={index === 0 ? handleImageLoad : undefined}
                />
              </div>
            );
          }}
          keyExtractor={(item) => item.id}
          interval={6000}
        />
      </div>
    </section>
  );
}