"use client";

type AgendaItem = {
  order: string;
  time: string;
  title: string;
  description: string;
  avatar?: string;
};

type Props = {
  data: {
    id: string;
    eyebrow: string;
    title: string;
    description: string;
    items: AgendaItem[];
  };
};

const renderFormattedText = (text: string) => {
  if (!text) return "";
  
  const lines = text.split("\n");
  
  return lines.map((line, lineIndex) => {
    // Split the line by markdown bold (**bold**) and italic (*italic*)
    const parts = line.split(/(\*\*.*?\*\*|\*.*?\*)/g);
    
    const renderedLine = parts.map((part, partIndex) => {
      if (part.startsWith("**") && part.endsWith("**")) {
        return (
          <strong key={partIndex} className="text-primary font-bold">
            {part.slice(2, -2)}
          </strong>
        );
      }
      if (part.startsWith("*") && part.endsWith("*")) {
        return (
          <em key={partIndex} className="italic text-on-surface-variant/80">
            {part.slice(1, -1)}
          </em>
        );
      }
      return part;
    });

    return (
      <span key={lineIndex} className="block min-h-[1.25rem]">
        {renderedLine}
      </span>
    );
  });
};

export default function AgendaSection({ data }: Props) {
  const base = process.env.NEXT_PUBLIC_BASE_PATH || "";

  const renderAvatar = (avatarUrl: string, sizeClass: string) => (
    <div className={`${sizeClass} rounded-full overflow-hidden border border-primary/20 bg-white/5 flex items-center justify-center backdrop-blur-sm shadow-inner shrink-0`}>
      {avatarUrl.includes("placeholder") ? (
        <svg className="w-1/2 h-1/2 text-primary/60" fill="none" stroke="currentColor" viewBox="0 0 24 24" strokeWidth={1.5}>
          <path strokeLinecap="round" strokeLinejoin="round" d="M15.75 6a3.75 3.75 0 1 1-7.5 0 3.75 3.75 0 0 1 7.5 0ZM4.501 20.118a7.5 7.5 0 0 1 14.998 0A17.933 17.933 0 0 1 12 21.75c-2.676 0-5.216-.584-7.499-1.632Z" />
        </svg>
      ) : (
        // eslint-disable-next-line @next/next/no-img-element
        <img
          src={`${base}${avatarUrl}`}
          alt="Speaker"
          className="w-full h-full object-cover"
        />
      )}
    </div>
  );

  return (
    <section className="py-16 lg:py-24 max-w-hd mx-auto px-[var(--spacing-gutter)]" id={data.id}>
      {/* Section Header */}
      <div className="flex flex-col lg:flex-row justify-between lg:items-end mb-16 lg:mb-28 gap-8">
        <div className="max-w-3xl">
          <span className="font-[var(--font-label-caps)] text-xs lg:text-sm text-primary block mb-4 lg:mb-6 tracking-[0.25em] uppercase">
            {data.eyebrow}
          </span>
          <h2 className="font-[var(--font-display-lg)] text-on-surface uppercase tracking-tight text-[clamp(1.75rem,3vw+1rem,3.5rem)]">
            {data.title}
          </h2>
        </div>
        <p className="text-on-surface-variant/60 text-base lg:text-lg max-w-md xl:text-right">
          {data.description}
        </p>
      </div>

      {/* Timeline Container */}
      <div className="relative w-full max-w-5xl mx-auto pl-10 lg:pl-0">
        
        {/* Central vertical line */}
        <div 
          className="absolute left-4 lg:left-1/2 top-4 bottom-4 w-[2px] bg-gradient-to-b from-primary via-primary/45 to-primary/5 -translate-x-1/2 pointer-events-none" 
          style={{ content: '""' }}
        />

        {/* Timeline Items */}
        <div className="space-y-12 lg:space-y-16">
          {data.items.map((item, index) => {
            const isEven = index % 2 === 0;
            return (
              <div key={item.order} className="relative w-full group">
                
                {/* Timeline Dot (glowing on hover) */}
                <div 
                  className="absolute left-[-24px] lg:left-1/2 top-6 lg:top-8 -translate-x-1/2 w-4 h-4 rounded-full bg-background border-2 border-primary z-20 group-hover:scale-125 group-hover:bg-primary group-hover:shadow-[0_0_10px_#c5a059] transition-all duration-300 status-led"
                />

                {/* Left/Right alternating grid layout */}
                <div className="grid grid-cols-1 lg:grid-cols-2 gap-4 lg:gap-16 w-full">
                  
                  {isEven ? (
                    <>
                      {/* Left: Card (Desktop) / Full content (Mobile) */}
                      <div className="order-1 lg:order-1">
                        <div className="glass-panel p-6 lg:p-8 rounded-3xl relative overflow-hidden hover:border-primary/50 transition-colors duration-300">
                          <span className="absolute top-6 right-6 text-xs lg:text-sm font-[var(--font-display-lg)] text-primary/30 group-hover:text-primary transition-colors duration-300">
                            {item.order}
                          </span>
                          {/* Mobile-only time badge */}
                          <div className="lg:hidden mb-3">
                            <span className="font-[var(--font-display-lg)] text-base text-primary">
                              {item.time}
                            </span>
                          </div>
                          <h3 className="font-[var(--font-display-lg)] text-base lg:text-lg text-on-surface mb-3 leading-snug text-balance pr-8">
                            {renderFormattedText(item.title)}
                          </h3>
                          {!item.description && item.avatar && (
                            <div className="flex lg:justify-end justify-start mb-3">
                              {renderAvatar(item.avatar, "w-10 h-10 lg:w-12 lg:h-12")}
                            </div>
                          )}
                          {item.description && (
                            <div className="text-xs lg:text-sm text-on-surface-variant/75 leading-relaxed border-t border-primary/10 pt-3 mt-3 flex flex-row lg:flex-row-reverse items-center gap-4">
                              {item.avatar && (
                                <div className="shrink-0">
                                  {renderAvatar(item.avatar, "w-10 h-10 lg:w-12 lg:h-12")}
                                </div>
                              )}
                              <div className="flex-1 lg:text-right">
                                {renderFormattedText(item.description)}
                              </div>
                            </div>
                          )}
                        </div>
                      </div>
                      
                      {/* Right: Time badge (Desktop-only) */}
                      <div className="order-2 lg:order-2 hidden lg:flex items-center justify-start pl-4">
                        <span className="font-[var(--font-display-lg)] text-xl lg:text-[22px] text-primary group-hover:text-on-surface transition-colors duration-300">
                          {item.time}
                        </span>
                      </div>
                    </>
                  ) : (
                    <>
                      {/* Left: Time badge (Desktop-only) */}
                      <div className="order-2 lg:order-1 hidden lg:flex items-center justify-end pr-4 text-right">
                        <span className="font-[var(--font-display-lg)] text-xl lg:text-[22px] text-primary group-hover:text-on-surface transition-colors duration-300">
                          {item.time}
                        </span>
                      </div>

                      {/* Right: Card (Desktop) / Full content (Mobile) */}
                      <div className="order-1 lg:order-2">
                        <div className="glass-panel p-6 lg:p-8 rounded-3xl relative overflow-hidden hover:border-primary/50 transition-colors duration-300">
                          <span className="absolute top-6 right-6 text-xs lg:text-sm font-[var(--font-display-lg)] text-primary/30 group-hover:text-primary transition-colors duration-300">
                            {item.order}
                          </span>
                          {/* Mobile-only time badge */}
                          <div className="lg:hidden mb-3">
                            <span className="font-[var(--font-display-lg)] text-base text-primary">
                              {item.time}
                            </span>
                          </div>
                          <h3 className="font-[var(--font-display-lg)] text-base lg:text-lg text-on-surface mb-3 leading-snug text-balance pr-8">
                            {renderFormattedText(item.title)}
                          </h3>
                          {!item.description && item.avatar && (
                            <div className="flex justify-start mb-3">
                              {renderAvatar(item.avatar, "w-10 h-10 lg:w-12 lg:h-12")}
                            </div>
                          )}
                          {item.description && (
                            <div className="text-xs lg:text-sm text-on-surface-variant/75 leading-relaxed border-t border-primary/10 pt-3 mt-3 flex flex-row items-center gap-4">
                              {item.avatar && (
                                <div className="shrink-0">
                                  {renderAvatar(item.avatar, "w-10 h-10 lg:w-12 lg:h-12")}
                                </div>
                              )}
                              <div className="flex-1">
                                {renderFormattedText(item.description)}
                              </div>
                            </div>
                          )}
                        </div>
                      </div>
                    </>
                  )}
                  
                </div>
              </div>
            );
          })}
        </div>
      </div>
    </section>
  );
}