import { useState } from 'react';
import { AnimatePresence, motion } from 'framer-motion';

interface Experience {
  id: string;
  company: string;
  logo?: string;
  role: string;
  period: string;
  duration: string;
  description: string;
  missions: string[];
  stack: string[];
  type: string;
  current?: boolean;
}

interface Props {
  items: Experience[];
}

function WaveformBar({ level }: { level: number }) {
  // ASCII-like progress bar with blocks
  const total = 12;
  const filled = Math.round(level * total);
  return (
    <span className="font-mono tracking-tighter" aria-hidden="true">
      {Array.from({ length: total }).map((_, i) => (
        <span
          key={i}
          style={{
            opacity: i < filled ? 1 : 0.25,
            color: i < filled ? 'var(--color-cyan)' : 'var(--color-text-dim)',
          }}
        >
          █
        </span>
      ))}
    </span>
  );
}

export default function Setlist({ items }: Props) {
  const [open, setOpen] = useState<string | null>(items[0]?.id ?? null);

  return (
    <div className="divide-y divide-[color:var(--color-border)] border-y border-[color:var(--color-border)]">
      {items.map((exp, i) => {
        const isOpen = open === exp.id;
        const bpm = exp.current ? 174 : 160 - i * 10;
        const level = exp.current ? 1 : Math.max(0.2, 1 - i * 0.15);
        return (
          <article key={exp.id} className={exp.current ? 'bg-[rgba(198,255,0,0.03)]' : ''}>
            <button
              type="button"
              onClick={() => setOpen(isOpen ? null : exp.id)}
              className="w-full flex items-center gap-3 md:gap-6 px-3 md:px-5 py-4 text-left group hover:bg-[rgba(255,255,255,0.02)] transition-colors"
              aria-expanded={isOpen}
            >
              {/* Track number */}
              <span className="font-mono text-xs md:text-sm text-[color:var(--color-text-dim)] w-8 tabular-nums">
                {String(i + 1).padStart(2, '0')}
              </span>

              {/* Status tag */}
              <span
                className="hidden sm:inline-flex items-center gap-1.5 font-mono text-[10px] uppercase tracking-widest w-28"
                style={{
                  color: exp.current ? 'var(--color-red)' : 'var(--color-text-dim)',
                }}
              >
                {exp.current ? (
                  <>
                    <span className="led led-red animate-led-red"></span>
                    [now playing]
                  </>
                ) : (
                  <span className="opacity-60">—</span>
                )}
              </span>

              {/* Company + role */}
              <div className="flex-1 min-w-0">
                <div className="font-display text-sm md:text-base font-semibold truncate group-hover:text-[color:var(--color-cyan)] transition-colors">
                  {exp.company}
                </div>
                <div className="font-mono text-[10px] md:text-xs text-[color:var(--color-text-muted)] uppercase tracking-wider truncate">
                  {exp.role} · {exp.period}
                </div>
              </div>

              {/* Waveform progress */}
              <div className="hidden md:block">
                <WaveformBar level={level} />
              </div>

              {/* BPM / duration */}
              <div className="hidden sm:flex flex-col items-end gap-0.5 font-mono text-[10px] uppercase tracking-widest text-[color:var(--color-text-dim)] w-24 shrink-0">
                <span>[{bpm} bpm]</span>
                <span>[{exp.duration}]</span>
              </div>

              {/* Chevron */}
              <span
                className={`font-mono text-[color:var(--color-cyan)] transition-transform ${isOpen ? 'rotate-90' : ''}`}
                aria-hidden="true"
              >
                &gt;
              </span>
            </button>

            <AnimatePresence initial={false}>
              {isOpen && (
                <motion.div
                  initial={{ height: 0, opacity: 0 }}
                  animate={{ height: 'auto', opacity: 1 }}
                  exit={{ height: 0, opacity: 0 }}
                  transition={{ duration: 0.35, ease: [0.22, 1, 0.36, 1] }}
                  className="overflow-hidden"
                >
                  <div className="px-3 md:px-5 pb-6 pt-2 grid grid-cols-1 md:grid-cols-[200px_1fr] gap-6">
                    <div className="flex items-start gap-3">
                      {exp.logo && (
                        <div className="w-16 h-16 shrink-0 flex items-center justify-center bg-[color:var(--color-bg)] border border-[color:var(--color-border)] rounded-sm p-2">
                          <img
                            src={exp.logo}
                            alt={exp.company}
                            className="w-full h-full object-contain"
                          />
                        </div>
                      )}
                      <div className="font-mono text-[10px] uppercase tracking-widest text-[color:var(--color-text-dim)] space-y-1">
                        <div>[type: {exp.type}]</div>
                        <div>[duration: {exp.duration}]</div>
                      </div>
                    </div>

                    <div>
                      <p className="text-sm text-[color:var(--color-text)] mb-4">{exp.description}</p>

                      {exp.missions.length > 0 && (
                        <ul className="space-y-1.5 mb-4">
                          {exp.missions.map((m, idx) => (
                            <li key={idx} className="flex gap-2 text-sm">
                              <span className="font-mono text-[color:var(--color-acid)] shrink-0">›</span>
                              <span className="text-[color:var(--color-text-muted)]">{m}</span>
                            </li>
                          ))}
                        </ul>
                      )}

                      {exp.stack.length > 0 && (
                        <div className="flex flex-wrap gap-1.5">
                          {exp.stack.map((tech) => (
                            <span
                              key={tech}
                              className="font-mono text-[10px] uppercase tracking-wider px-2 py-1 text-[color:var(--color-cyan)] border border-[color:var(--color-cyan)]/30 bg-[color:var(--color-cyan)]/5 rounded-sm"
                            >
                              {tech}
                            </span>
                          ))}
                        </div>
                      )}
                    </div>
                  </div>
                </motion.div>
              )}
            </AnimatePresence>
          </article>
        );
      })}
    </div>
  );
}