import React, { useEffect, useState, useRef } from "react";
import styled from 'styled-components';

export default function EngineeringHeroFlowbite() {
  const defaultConfig = {
    main_title: "شريكك الهندسي لتنفيذ وإدارة المشاريع باحتراف",
    subtitle:
      "حلول متكاملة تشمل التصميم، التنفيذ، التشغيل، والصيانة\nللمشاريع الصناعية والمدنية، وفق أحدث المعايير والتقنيات",
    primary_color: "#e67e22",
    background_color: "#000000",
    text_color: "#ffffff",
    secondary_surface: "#95a5a6",
    secondary_action: "#34495e",
    font_family: "Cairo",
    font_size: 16,
  };

  const [config, setConfig] = useState(defaultConfig);
  const [isMounted, setIsMounted] = useState(false);

  const mainTitleRef = useRef(null);
  const subtitleRef = useRef(null);

  useEffect(() => {
    const id = "cairo-font-link";
    if (!document.getElementById(id)) {
      const link = document.createElement("link");
      link.id = id;
      link.rel = "stylesheet";
      link.href = "https://fonts.googleapis.com/css2?family=Cairo:wght@400;600;700;800&display=swap";
      document.head.appendChild(link);
    }
  }, []);

  useEffect(() => {
    const t = setTimeout(() => setIsMounted(true), 60);
    return () => clearTimeout(t);
  }, []);

  useEffect(() => {
    const main = mainTitleRef.current;
    const sub = subtitleRef.current;
    const baseFontStack = "Arial, sans-serif";
    const font = (config.font_family || defaultConfig.font_family) + ", " + baseFontStack;
    const baseSize = config.font_size || defaultConfig.font_size;

    const applyStyles = () => {
      const width = typeof window !== "undefined" ? window.innerWidth : 1024;

      // Make the *base font size* responsive: smaller on small screens
      // fine-grained breakpoints so we avoid abrupt jumps
      const responsiveBase = width <= 400 ? baseSize * 0.78 : width <= 640 ? baseSize * 0.88 : width <= 1024 ? baseSize * 0.96 : baseSize;

      // multipliers: smaller on small screens
      const headingMultiplier = width <= 640 ? 3.0 : 3.8;
      const subtitleMultiplier = width <= 640 ? 0.95 : 1.1;

      // expose base to CSS (some rules reference --base)
      const root = document.documentElement;
      root.style.setProperty('--base', `${responsiveBase}px`);

      if (main) {
        const headingText = (config.main_title || defaultConfig.main_title)
          .split("\n")
          .map((s) => s.trim())
          .filter(Boolean);
        if (headingText.length === 1) {
          main.textContent = headingText[0];
        } else {
          main.innerHTML = `<span style="display:block;line-height:1.02">${headingText[0]}</span><span style="display:block;font-weight:700;opacity:0.95;margin-top:6px">${headingText
            .slice(1)
            .join("<br/>")}</span>`;
        }

        main.style.fontFamily = font;
        // use responsiveBase so the font becomes smaller on small screens
        main.style.fontSize = `${responsiveBase * headingMultiplier}px`;
        main.style.color = config.text_color || defaultConfig.text_color;
        main.style.fontWeight = 800;
        main.style.textAlign = "right";
      }

      if (sub) {
        sub.innerHTML = (config.subtitle || defaultConfig.subtitle)
          .split("\n")
          .map((s) => `<div>${s.trim()}</div>`)
          .join("");
        sub.style.fontFamily = font;
        sub.style.fontSize = `${responsiveBase * subtitleMultiplier}px`;
        sub.style.color = config.text_color || defaultConfig.text_color;
        sub.style.textAlign = "right";
        sub.style.maxWidth = "800px";
      }

      // keep CSS variables synced
      root.style.setProperty("--ehb-primary", config.primary_color || defaultConfig.primary_color);
      root.style.setProperty("--ehb-background", config.background_color || defaultConfig.background_color);
      root.style.setProperty("--ehb-surface", config.secondary_surface || defaultConfig.secondary_surface);
      root.style.setProperty("--ehb-action", config.secondary_action || defaultConfig.secondary_action);
    };

    // initial apply
    applyStyles();

    // update on resize so that small-screen changes reactively apply
    window.addEventListener("resize", applyStyles);
    return () => window.removeEventListener("resize", applyStyles);
  }, [config]);

  useEffect(() => {
    const element = {
      defaultConfig,
      onConfigChange: async (newCfg) => {
        setConfig((c) => ({ ...c, ...newCfg }));
      },
      mapToCapabilities: (cfg) => ({
        recolorables: [
          {
            get: () => cfg.background_color || defaultConfig.background_color,
            set: (value) => {
              cfg.background_color = value;
              window?.elementSdk?.setConfig?.({ background_color: value });
              setConfig({ ...cfg });
            },
          },
          {
            get: () => cfg.secondary_surface || defaultConfig.secondary_surface,
            set: (value) => {
              cfg.secondary_surface = value;
              window?.elementSdk?.setConfig?.({ secondary_surface: value });
              setConfig({ ...cfg });
            },
          },
          {
            get: () => cfg.text_color || defaultConfig.text_color,
            set: (value) => {
              cfg.text_color = value;
              window?.elementSdk?.setConfig?.({ text_color: value });
              setConfig({ ...cfg });
            },
          },
          {
            get: () => cfg.primary_color || defaultConfig.primary_color,
            set: (value) => {
              cfg.primary_color = value;
              window?.elementSdk?.setConfig?.({ primary_color: value });
              setConfig({ ...cfg });
            },
          },
          {
            get: () => cfg.secondary_action || defaultConfig.secondary_action,
            set: (value) => {
              cfg.secondary_action = value;
              window?.elementSdk?.setConfig?.({ secondary_action: value });
              setConfig({ ...cfg });
            },
          },
        ],
        borderables: [],
        fontEditable: {
          get: () => cfg.font_family || defaultConfig.font_family,
          set: (value) => {
            cfg.font_family = value;
            window?.elementSdk?.setConfig?.({ font_family: value });
            setConfig({ ...cfg });
          },
        },
        fontSizeable: {
          get: () => cfg.font_size || defaultConfig.font_size,
          set: (value) => {
            cfg.font_size = value;
            window?.elementSdk?.setConfig?.({ font_size: value });
            setConfig({ ...cfg });
          },
        },
      }),
      mapToEditPanelValues: (cfg) =>
        new Map([
          ["main_title", cfg.main_title || defaultConfig.main_title],
          ["subtitle", cfg.subtitle || defaultConfig.subtitle],
        ]),
    };

    if (window?.elementSdk?.init) {
      try {
        window.elementSdk.init(element);
      } catch (e) {}
    }
  }, []);

  const goToDepartments = (e) => {
    e && e.preventDefault && e.preventDefault();
    const el = document.getElementById("departments");
    if (el) {
      el.scrollIntoView({ behavior: "smooth", block: "start" });
    } else {
      window.scrollTo({ top: 0, behavior: "smooth" });
    }
  };

  const OrangeActionButton = ({ onClick, children }) => {
    return (
      <StyledWrapper>
        <button className="button" onClick={onClick} aria-label="تعرف على أقسامنا">
          {children}
          <svg className="icon" viewBox="0 0 24 24" fill="currentColor" aria-hidden>
            <path fillRule="evenodd" d="M12 2.25c-5.385 0-9.75 4.365-9.75 9.75s4.365 9.75 9.75 9.75 9.75-4.365 9.75-9.75S17.385 2.25 12 2.25zm4.28 10.28a.75.75 0 000-1.06l-3-3a.75.75 0 10-1.06 1.06l1.72 1.72H8.25a.75.75 0 000 1.5h5.69l-1.72 1.72a.75.75 0 101.06 1.06l3-3z" clipRule="evenodd" />
          </svg>
        </button>
      </StyledWrapper>
    );
  };

  return (
    <div dir="rtl" className="h-screen w-full overflow-hidden content-container" style={{ background: "transparent" }}>
      <style>{` 
        :root { --ehb-primary: #e67e22; --ehb-background: #000000; --ehb-surface: #95a5a6; --ehb-action: #34495e; --base: 16px }

        .hero-section{position:relative;width:100%;height:100%;overflow:hidden}
        .hero-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(to bottom, rgba(0,0,0,0.65), rgba(0,0,0,0.35));z-index:3}
        /* use clamp for padding so layout breathes on small screens */
        .hero-layout{position:relative;z-index:10;height:100%;display:flex;align-items:center;justify-content:space-between;padding:clamp(12px,4vw,40px);gap:2rem;direction:ltr;flex-direction:row}
        .hero-left{flex:1;display:flex;align-items:center;justify-content:flex-start;padding:20px;position:relative;flex-direction:column}

        /* BIG IMAGE: slide-in slower, with delay */
        .hero-left img{ max-width:100%; height:auto; display:block; transform: translateX(-20px) scale(0.995); opacity:1; will-change: transform, opacity; }
        .hero-section.is-mounted .hero-left img{
          transform: translateX(-120px) scale(0.96);
          opacity: 0;
          animation: slideInLeft 1200ms cubic-bezier(.2,.9,.2,1) 200ms both;
        }
        @keyframes slideInLeft {
          0% { transform: translateX(-140px) scale(0.96); opacity: 0; filter: blur(2px); }
          65% { transform: translateX(18px) scale(1.02); opacity: 1; filter: blur(0); }
          100% { transform: translateX(0) scale(1); opacity: 1; }
        }

        /* partner bubbles - pop slower and float slower (made slightly larger and lighter background) */
        .partner-logos{display:flex;gap:18px;margin-top:20px;align-items:flex-end;justify-content:flex-start}
        .partner-bubble{
          width:132px;height:132px;border-radius:9999px;background:linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.06));display:flex;align-items:center;justify-content:center;overflow:hidden;box-shadow:0 12px 36px rgba(0,0,0,0.45);backdrop-filter: blur(4px);transition:transform 420ms cubic-bezier(.2,.9,.2,1),box-shadow 420ms;
          transform-origin:center;
          transform: translateY(10px) scale(0.95);
          opacity: 0;
          will-change: transform, opacity;
        }
        .hero-section.is-mounted .partner-bubble{
          animation:
            popIn 900ms cubic-bezier(.2,.9,.2,1) both,
            floatBubble 5s ease-in-out 1100ms infinite;
        }
        .partner-bubble img{max-width:78%;max-height:78%;object-fit:contain;filter:grayscale(0.06) saturate(0.95)}
        .partner-bubble:hover{transform:translateY(-10px) scale(1.08);box-shadow:0 34px 72px rgba(0,0,0,0.55)}

        @keyframes popIn {
          0% { transform: translateY(30px) scale(0.6); opacity: 0; filter: blur(2px); }
          65% { transform: translateY(-10px) scale(1.06); opacity: 1; filter: blur(0); }
          100% { transform: translateY(0) scale(1); opacity: 1; }
        }

        @keyframes floatBubble{0%{transform:translateY(0) scale(1)}25%{transform:translateY(-10px) scale(1.03)}50%{transform:translateY(-24px) scale(1.07)}75%{transform:translateY(-10px) scale(1.03)}100%{transform:translateY(0) scale(1)}}

        /* partner strip */
        .partner-strip-wrap{position:fixed;left:0;bottom:14px;z-index:30;pointer-events:auto;width:100%;display:flex;justify-content:flex-start;padding-left:40px;padding-right:40px}
        .partner-strip{backface-visibility:hidden;transform-style:preserve-3d;perspective:1000px;display:flex;align-items:center;gap:18px;padding:12px 20px;border-radius:14px;box-shadow:0 18px 40px rgba(0,0,0,0.55);
          background:linear-gradient(90deg, rgba(6,23,58,0.98) 0%, rgba(30,50,90,0.9) 35%, rgba(230,126,34,0.98) 100%);
          transform: translateX(-120%) translateZ(0) rotateX(6deg) skewY(-2deg);
          animation: slideInStrip 1600ms cubic-bezier(.2,.9,.2,1) 600ms forwards;
          will-change:transform,opacity;
        }
        @keyframes slideInStrip{
          0%{opacity:0;transform:translateX(-120%) translateZ(0) rotateX(8deg) skewY(-4deg) scale(0.98)}
          70%{transform:translateX(12px) translateZ(6px) rotateX(2deg) skewY(-1deg) scale(1.01);opacity:1}
          100%{transform:translateX(0) translateZ(10px) rotateX(0deg) skewY(0deg) scale(1);opacity:1}
        }

        .partner-item{display:flex;align-items:center;justify-content:center;padding:6px;border-radius:10px;min-width:84px;min-height:48px;background:rgba(255,255,255,0.04);backdrop-filter:blur(4px);box-shadow:0 6px 18px rgba(0,0,0,0.45);transition:transform 400ms cubic-bezier(.2,.9,.2,1),box-shadow 400ms}
        .partner-item img{max-height:36px;max-width:140px;object-fit:contain;display:block;filter:grayscale(0.06) saturate(0.95)}
        .partner-item:hover{transform:translateY(-6px) translateZ(18px) rotateX(6deg);box-shadow:0 30px 50px rgba(0,0,0,0.55)}

        @media (max-width: 1024px){
          .partner-strip{padding:10px 14px;border-radius:12px}
          .partner-item{min-width:72px;min-height:44px}
          .partner-item img{max-height:30px}
          .partner-strip-wrap{padding-left:20px;padding-right:20px;bottom:10px}
        }
        @media (max-width: 640px){
          .partner-strip{gap:10px;padding:8px;border-radius:10px}
          .partner-item img{max-height:24px}
          .partner-logos{gap:12px}
          /* make the partner bubbles slightly smaller (already present) */
          .partner-bubble{width:100px;height:100px}
          /* reduce the three bubble images a bit more on small screens only */
          .partner-bubble img{max-width:64%;max-height:64%}
          /* reduce spacing for smaller screens */
          .hero-layout{gap:1rem}
        }

        /* HERO TEXT: slide from right (slower) */
        .hero-content{flex:1;z-index:15;display:flex;flex-direction:column;align-items:flex-end;justify-content:center;padding:clamp(12px,3.5vw,40px)}
        .hero-title{ opacity:1; transform: translateX(0) translateY(0) scale(1); will-change: transform, opacity; }
        .hero-subtitle{ opacity:1; transform: translateX(0) translateY(0) scale(1); will-change: transform, opacity; }

        .hero-section.is-mounted .hero-title{
          opacity:0;
          transform: translateX(120px) translateY(10px) scale(0.995);
          animation: slideFromRight 1000ms cubic-bezier(.2,.9,.2,1) 260ms both;
        }
        .hero-section.is-mounted .hero-subtitle{
          opacity:0;
          transform: translateX(96px) translateY(6px) scale(0.995);
          animation: slideFromRight 1000ms cubic-bezier(.2,.9,.2,1) 520ms both;
        }
        @keyframes slideFromRight {
          0% { opacity:0; transform: translateX(120px) translateY(18px) scale(0.98); filter: blur(2px); }
          65% { transform: translateX(-8px) translateY(-8px) scale(1.02); opacity:1; filter: blur(0); }
          100% { opacity:1; transform: translateX(0) translateY(0) scale(1); }
        }

        @media (max-width: 768px){
          .hero-layout{flex-direction:column;align-items:center;text-align:center}
          .hero-content{align-items:center}
          /* fallback if JS hasn't run yet: use --base variable */
          .hero-title{font-size:calc(var(--base,16px) * 2.0) !important}
          .hero-subtitle{font-size:calc(var(--base,16px) * 1.0) !important}
        }

        /* BUTTON: slower pop-in */
        .button {
          position: relative;
          transition: all 0.3s ease-in-out;
          box-shadow: 0px 10px 20px rgba(0, 0, 0, 0.2);
          padding-block: 0.5rem;
          padding-inline: 1.25rem;
          background-color: var(--ehb-primary, #e67e22);
          border-radius: 9999px;
          display: flex;
          align-items: center;
          justify-content: center;
          color: #ffff;
          gap: 10px;
          font-weight: bold;
          border: 3px solid #ffffff4d;
          outline: none;
          overflow: hidden;
          font-size: 15px;
          cursor: pointer;
          transform: translateY(0) scale(1);
          opacity: 1;
        }

        .hero-section.is-mounted .button{
          transform: scale(0.6);
          opacity: 0;
          animation: popIn 900ms cubic-bezier(.2,.9,.2,1) 760ms both;
          will-change: transform, opacity;
        }

        .icon { width: 24px; height: 24px; transition: all 0.3s ease-in-out; }
        .button:hover { transform: scale(1.05); border-color: #fff9; }
        .button:hover .icon { transform: translate(4px); }
        .button:hover::before { animation: shine 1.5s ease-out infinite; }

        .button::before {
          content: "";
          position: absolute;
          width: 100px;
          height: 100%;
          background-image: linear-gradient(
            120deg,
            rgba(255, 255, 255, 0) 30%,
            rgba(255, 255, 255, 0.8),
            rgba(255, 255, 255, 0) 70%
          );
          top: 0;
          left: -100px;
          opacity: 0.6;
        }

        @keyframes popIn {
          0% { transform: translateY(30px) scale(0.6); opacity: 0; filter: blur(2px); }
          65% { transform: translateY(-10px) scale(1.06); opacity: 1; filter: blur(0); }
          100% { transform: translateY(0) scale(1); opacity: 1; }
        }

        @keyframes shine {
          0% { left: -100px; }
          60% { left: 100%; }
          to { left: 100%; }
        }
      `}</style>

      <div className={`hero-section ${isMounted ? "is-mounted" : ""}`}>
        <div className="hero-overlay" />
        <div className="hero-layout">
          <div className="hero-left">
            <img src="src/assets/REXNT.png" alt="REXNT" />

            <div className="partner-logos" aria-hidden>
              <div className="partner-bubble" style={{ animationDelay: "0ms" }} aria-label="شريك TPS">
                <img src="src/assets/TPS-logo.png" alt="TPS" />
              </div>
              <div className="partner-bubble" style={{ animationDelay: "180ms" }} aria-label="شريك NSC">
                <img src="src/assets/NSC.png" alt="NSC" />
              </div>
              <div className="partner-bubble" style={{ animationDelay: "360ms" }} aria-label="شريك LOGO">
                <img src="src/assets/LOGO.png" alt="LOGO" />
              </div>
            </div>
          </div>

          <div className="hero-content">
            <h1 ref={mainTitleRef} className="hero-title text-white text-right" style={{ fontWeight: 800, marginBottom: 16, textShadow: "2px 2px 10px rgba(0,0,0,0.6)" }} />
            <p ref={subtitleRef} className="hero-subtitle text-white text-right" style={{ maxWidth: 800, textShadow: "1px 1px 6px rgba(0,0,0,0.45)", lineHeight: 1.6 }} />
            <div style={{ marginTop: 18 }}>
              <OrangeActionButton onClick={goToDepartments}>تعرف على أقسامنا</OrangeActionButton>
            </div>
          </div>
        </div>
      </div>

     
    </div>
  );
}

const StyledWrapper = styled.div`
  .button {
    position: relative;
    transition: all 0.3s ease-in-out;
    box-shadow: 0px 10px 20px rgba(0, 0, 0, 0.2);
    padding-block: 0.5rem;
    padding-inline: 1.25rem;
    background-color: var(--ehb-primary, #e67e22);
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffff;
    gap: 10px;
    font-weight: bold;
    border: 3px solid #ffffff4d;
    outline: none;
    overflow: hidden;
    font-size: 15px;
    cursor: pointer;
  }

  .icon { width: 24px; height: 24px; transition: all 0.3s ease-in-out; }

  .button:hover { transform: scale(1.05); border-color: #fff9; }
  .button:hover .icon { transform: translate(4px); }
  .button:hover::before { animation: shine 1.5s ease-out infinite; }

  .button::before {
    content: "";
    position: absolute;
    width: 100px;
    height: 100%;
    background-image: linear-gradient(
      120deg,
      rgba(255, 255, 255, 0) 30%,
      rgba(255, 255, 255, 0.8),
      rgba(255, 255, 255, 0) 70%
    );
    top: 0;
    left: -100px;
    opacity: 0.6;
  }

  @keyframes shine {
    0% { left: -100px; }
    60% { left: 100%; }
    to { left: 100%; }
  }
`;
