"use client";

import { useEffect, useRef } from "react";

interface SkillsProps {
  skills: string[];
  languages: { name: string; level: string }[];
  interests: string[];
}

export default function Skills({ skills, languages, interests }: SkillsProps) {
  const headingRef = useRef<HTMLDivElement>(null);
  const skillsRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const els = [headingRef.current, skillsRef.current].filter(Boolean);
    const obs = new IntersectionObserver(
      (entries) => {
        entries.forEach((entry) => {
          if (entry.isIntersecting) {
            entry.target.classList.add("visible");
          }
        });
      },
      { threshold: 0.1 }
    );
    els.forEach((el) => el && obs.observe(el));
    return () => obs.disconnect();
  }, []);

  // Give skills a pseudo-random "weight" based on their index for visual variety
  const weights = [1.3, 1, 1.5, 1, 1.2, 0.9, 1.4, 1, 1.1, 0.95, 1.3, 1, 1.2, 0.9, 1.4, 1, 1.1, 1.3];

  const levelColor = (level: string) => {
    if (level === "Native") return "#c8a96e";
    if (level === "C2") return "#3a7a5a";
    if (level === "C1") return "#6b7a50";
    return "#4a5060";
  };

  return (
    <section
      id="skills"
      style={{ padding: "8rem 2rem", background: "#0a0b0e" }}
    >
      <div style={{ maxWidth: "1200px", margin: "0 auto" }}>
        <div ref={headingRef} className="reveal" style={{ marginBottom: "4rem" }}>
          <div className="section-label" style={{ marginBottom: "0.75rem" }}>Expertise</div>
          <h2
            className="font-display"
            style={{
              fontFamily: "var(--font-bebas), sans-serif",
              fontSize: "clamp(2.5rem, 6vw, 5rem)",
              letterSpacing: "0.04em",
              color: "#e2e4e9",
              lineHeight: 1,
            }}
          >
            Skills &amp; Profile
          </h2>
          <div style={{ width: "48px", height: "1px", background: "#c8a96e", marginTop: "1rem" }} />
        </div>

        <div
          style={{
            display: "grid",
            gridTemplateColumns: "repeat(auto-fit, minmax(min(100%, 340px), 1fr))",
            gap: "2rem",
          }}
        >
          {/* Tech skills */}
          <div ref={skillsRef} className="reveal">
            <div
              className="font-mono"
              style={{
                fontFamily: "var(--font-jetbrains), monospace",
                fontSize: "0.62rem",
                letterSpacing: "0.18em",
                color: "#4a5060",
                textTransform: "uppercase",
                marginBottom: "1.5rem",
                paddingBottom: "0.75rem",
                borderBottom: "1px solid #1c1f26",
              }}
            >
              Technical Stack
            </div>
            <div style={{ display: "flex", flexWrap: "wrap", gap: "0.5rem", alignItems: "center" }}>
              {skills.map((skill, i) => (
                <span
                  key={skill}
                  style={{
                    fontFamily: "var(--font-jetbrains), monospace",
                    fontSize: `${0.68 * (weights[i % weights.length] ?? 1)}rem`,
                    padding: "4px 12px",
                    border: "1px solid #1c1f26",
                    color: "#6b7280",
                    background: "#0e1014",
                    letterSpacing: "0.06em",
                    transition: "all 0.2s",
                    cursor: "default",
                  }}
                  onMouseEnter={(e) => {
                    const el = e.currentTarget as HTMLElement;
                    el.style.borderColor = "#c8a96e";
                    el.style.color = "#c8a96e";
                    el.style.background = "rgba(200,169,110,0.05)";
                  }}
                  onMouseLeave={(e) => {
                    const el = e.currentTarget as HTMLElement;
                    el.style.borderColor = "#1c1f26";
                    el.style.color = "#6b7280";
                    el.style.background = "#0e1014";
                  }}
                >
                  {skill}
                </span>
              ))}
            </div>
          </div>

          {/* Languages + Interests stacked */}
          <div style={{ display: "flex", flexDirection: "column", gap: "2rem" }}>
            {/* Languages */}
            <div>
              <div
                className="font-mono"
                style={{
                  fontFamily: "var(--font-jetbrains), monospace",
                  fontSize: "0.62rem",
                  letterSpacing: "0.18em",
                  color: "#4a5060",
                  textTransform: "uppercase",
                  marginBottom: "1.5rem",
                  paddingBottom: "0.75rem",
                  borderBottom: "1px solid #1c1f26",
                }}
              >
                Languages
              </div>
              <div style={{ display: "flex", flexDirection: "column", gap: "0.75rem" }}>
                {languages.map((lang) => (
                  <div
                    key={lang.name}
                    style={{ display: "flex", alignItems: "center", justifyContent: "space-between" }}
                  >
                    <span
                      style={{
                        fontFamily: "var(--font-lora), serif",
                        fontSize: "0.95rem",
                        color: "#e2e4e9",
                      }}
                    >
                      {lang.name}
                    </span>
                    <span
                      className="font-mono"
                      style={{
                        fontFamily: "var(--font-jetbrains), monospace",
                        fontSize: "0.62rem",
                        letterSpacing: "0.12em",
                        padding: "2px 8px",
                        border: `1px solid ${levelColor(lang.level)}`,
                        color: levelColor(lang.level),
                      }}
                    >
                      {lang.level}
                    </span>
                  </div>
                ))}
              </div>
            </div>

            {/* Interests */}
            <div>
              <div
                className="font-mono"
                style={{
                  fontFamily: "var(--font-jetbrains), monospace",
                  fontSize: "0.62rem",
                  letterSpacing: "0.18em",
                  color: "#4a5060",
                  textTransform: "uppercase",
                  marginBottom: "1.5rem",
                  paddingBottom: "0.75rem",
                  borderBottom: "1px solid #1c1f26",
                }}
              >
                Interests
              </div>
              <div style={{ display: "flex", flexWrap: "wrap", gap: "0.5rem" }}>
                {interests.map((interest) => (
                  <span
                    key={interest}
                    style={{
                      fontFamily: "var(--font-lora), serif",
                      fontSize: "0.85rem",
                      padding: "4px 14px",
                      border: "1px solid #1c1f26",
                      color: "#6b7280",
                      background: "#0e1014",
                      fontStyle: "italic",
                      transition: "all 0.2s",
                      cursor: "default",
                    }}
                    onMouseEnter={(e) => {
                      const el = e.currentTarget as HTMLElement;
                      el.style.borderColor = "#6b5730";
                      el.style.color = "#c8a96e";
                    }}
                    onMouseLeave={(e) => {
                      const el = e.currentTarget as HTMLElement;
                      el.style.borderColor = "#1c1f26";
                      el.style.color = "#6b7280";
                    }}
                  >
                    {interest}
                  </span>
                ))}
              </div>
            </div>
          </div>
        </div>
      </div>
    </section>
  );
}