import React, { useMemo, useEffect, useState } from "react";
import {
  AbsoluteFill,
  interpolate,
  useCurrentFrame,
  useVideoConfig,
  delayRender,
  continueRender,
  spring,
  Img,
} from "remotion";

 
import { MouseCursor } from "../components/MouseCursor";
import { ContactForm } from "@/src/components/ContactForm";
import { BackgroundGrid } from "@/src/components/Layout";
import { initialState } from "@/src/components/ContactForm/constants";

// Brand Assets
import IconWhite from "@/src/assets/logo/Icon White Transparent.svg";

export const ContactFormShowcase: React.FC = () => {
  const frame = useCurrentFrame();
  const { width, height, fps } = useVideoConfig();
  const [handle] = useState(() =>
    delayRender("Initializing Deep Interaction Script"),
  );

  useEffect(() => {
    if (typeof window !== "undefined") (window as any).isRemotion = true;
    const timer = setTimeout(() => continueRender(handle), 500);
    return () => clearTimeout(timer);
  }, [handle]);

  // ---- TIMELINE CONSTANTS (1500 Frames / 25s) ----
  const T = useMemo(
    () => ({
      ENTER: 0,
      // Step 0: Type Selection
      SELECT_WEBSITE: 60,
      NEXT_0: 100,

      // Step 1: Company Profile
      COMPANY_TYPE_START: 150,
      COMPANY_TYPE_END: 250,
      NEXT_1: 300,

      // Step 2: Presence
      URL_TYPE_START: 350,
      URL_TYPE_END: 450,
      NEXT_2: 500,

      // Step 3: Scope & Services (Multi-clicks)
      SCOPE_CLICK_1: 550,
      SCOPE_CLICK_2: 600,
      SCOPE_CLICK_3: 650,
      NEXT_3: 750,

      // Step 4: Design Vibe
      VIBE_SELECT: 850,
      NEXT_4: 950,

      // Step 5: Contact Info
      NAME_TYPE_START: 1050,
      NAME_TYPE_END: 1120,
      EMAIL_TYPE_START: 1150,
      EMAIL_TYPE_END: 1250,
      MESSAGE_TYPE_START: 1280,
      MESSAGE_TYPE_END: 1400,
      SUBMIT: 1450,

      EXIT: 1500,
    }),
    [],
  );

  // ---- FORM STATE LOGIC ----
  const formState = useMemo(() => {
    const state = { ...initialState };

    // Step 0: Fixed to website per request
    state.projectType = "website";

    // Step 1: Company
    if (frame > T.COMPANY_TYPE_START) {
      const text = "Mintel Studios";
      const progress = interpolate(
        frame,
        [T.COMPANY_TYPE_START, T.COMPANY_TYPE_END],
        [0, text.length],
        { extrapolateRight: "clamp" },
      );
      state.companyName = text.substring(0, Math.round(progress));
    }

    // Step 2: URL
    if (frame > T.URL_TYPE_START) {
      const text = "mintel.me";
      const progress = interpolate(
        frame,
        [T.URL_TYPE_START, T.URL_TYPE_END],
        [0, text.length],
        { extrapolateRight: "clamp" },
      );
      state.existingWebsite = text.substring(0, Math.round(progress));
    }

    // Step 3: Selections
    if (frame > T.SCOPE_CLICK_1) state.selectedPages = ["Home", "About"];
    if (frame > T.SCOPE_CLICK_2)
      state.selectedPages = ["Home", "About", "Services"];
    if (frame > T.SCOPE_CLICK_3) state.features = ["blog_news"];

    // Step 4: Design
    if (frame > T.VIBE_SELECT) state.designVibe = "tech";

    // Step 5: Contact
    if (frame > T.NAME_TYPE_START) {
      const text = "Marc Mintel";
      const progress = interpolate(
        frame,
        [T.NAME_TYPE_START, T.NAME_TYPE_END],
        [0, text.length],
        { extrapolateRight: "clamp" },
      );
      state.name = text.substring(0, Math.round(progress));
    }
    if (frame > T.EMAIL_TYPE_START) {
      const text = "request@mintel.me";
      const progress = interpolate(
        frame,
        [T.EMAIL_TYPE_START, T.EMAIL_TYPE_END],
        [0, text.length],
        { extrapolateRight: "clamp" },
      );
      state.email = text.substring(0, Math.round(progress));
    }
    if (frame > T.MESSAGE_TYPE_START) {
      const text = "Hi folks! Let's build something cinematic and smooth.";
      const progress = interpolate(
        frame,
        [T.MESSAGE_TYPE_START, T.MESSAGE_TYPE_END],
        [0, text.length],
        { extrapolateRight: "clamp" },
      );
      state.message = text.substring(0, Math.round(progress));
    }

    return state;
  }, [frame, T]);

  // ---- STEP NAVIGATION ----
  const stepIndex = useMemo(() => {
    if (frame < T.NEXT_0) return 0;
    if (frame < T.NEXT_1) return 1;
    if (frame < T.NEXT_2) return 2;
    if (frame < T.NEXT_3) return 3;
    if (frame < T.NEXT_4) return 6; // Mapping depends on actual component order, let's assume standard sequence
    if (frame < T.SUBMIT) return 12; // Final Contact step
    return 13; // Success
  }, [frame, T]);

  // ---- CAMERA ANCHORS ----
  const anchors = useMemo(
    () => ({
      overview: { z: 0.85, x: 0, y: 0 },
      type: { z: 1.15, x: 250, y: 150 },
      company: { z: 1.3, x: 100, y: 50 },
      presence: { z: 1.3, x: 100, y: -50 },
      scope: { z: 1.1, x: -100, y: 0 },
      design: { z: 1.15, x: 150, y: 100 },
      contact: { z: 1.25, x: 0, y: 400 },
      success: { z: 0.9, x: 0, y: 0 },
    }),
    [],
  );

  const activeAnchor = useMemo(() => {
    if (frame < T.SELECT_WEBSITE) return anchors.overview;
    if (frame < T.NEXT_0) return anchors.type;
    if (frame < T.NEXT_1) return anchors.company;
    if (frame < T.NEXT_2) return anchors.presence;
    if (frame < T.NEXT_3) return anchors.scope;
    if (frame < T.NEXT_4) return anchors.design;
    if (frame < T.SUBMIT) return anchors.contact;
    return anchors.success;
  }, [frame, anchors, T]);

  const _camera = useMemo(() => {
    // Continuous organic spring follow
    const _s = spring({
      frame,
      fps,
      config: { stiffness: 45, damping: 20 },
    });

    return activeAnchor;
  }, [frame, activeAnchor, fps]);

  // Simple smooth camera interpolation for the actual movement
  const smoothCamera = useMemo(() => {
    return activeAnchor;
  }, [activeAnchor]);

  // ---- MOUSE PATH ----
  const mouse = useMemo(() => {
    const targets = {
      off: { x: width * 1.2, y: height * 1.2 },
      type_website: { x: 200, y: 50 },
      btn_next: { x: 450, y: 450 },
      company_input: { x: 0, y: 0 },
      url_input: { x: 0, y: -50 },
      scope_1: { x: -300, y: -100 },
      scope_2: { x: -300, y: 0 },
      scope_3: { x: 0, y: 200 },
      vibe_tech: { x: 250, y: 100 },
      contact_name: { x: -200, y: 200 },
      contact_email: { x: 200, y: 200 },
      contact_msg: { x: 0, y: 400 },
      btn_submit: { x: 400, y: 550 },
    };

    const path = [
      { f: 0, ...targets.off },
      { f: T.SELECT_WEBSITE, ...targets.type_website },
      { f: T.NEXT_0, ...targets.btn_next },
      { f: T.COMPANY_TYPE_START, ...targets.company_input },
      { f: T.NEXT_1, ...targets.btn_next },
      { f: T.URL_TYPE_START, ...targets.url_input },
      { f: T.NEXT_2, ...targets.btn_next },
      { f: T.SCOPE_CLICK_1, ...targets.scope_1 },
      { f: T.SCOPE_CLICK_2, ...targets.scope_2 },
      { f: T.SCOPE_CLICK_3, ...targets.scope_3 },
      { f: T.NEXT_3, ...targets.btn_next },
      { f: T.VIBE_SELECT, ...targets.vibe_tech },
      { f: T.NEXT_4, ...targets.btn_next },
      { f: T.NAME_TYPE_START, ...targets.contact_name },
      { f: T.EMAIL_TYPE_START, ...targets.contact_email },
      { f: T.MESSAGE_TYPE_START, ...targets.contact_msg },
      { f: T.SUBMIT, ...targets.btn_submit },
      { f: T.EXIT, ...targets.off },
    ];

    let idx = 0;
    for (let i = 0; i < path.length; i++) {
      if (frame >= path[i].f) idx = i;
    }

    const p1 = path[idx];
    const p2 = path[idx + 1] || p1;

    const s = spring({
      frame: frame - p1.f,
      fps,
      config: { stiffness: 60, damping: 25 },
    });

    return {
      x: interpolate(s, [0, 1], [p1.x, p2.x]),
      y: interpolate(s, [0, 1], [p1.y, p2.y]),
    };
  }, [frame, width, height, fps, T]);

  const isClicking = useMemo(() => {
    const clicks = [
      T.SELECT_WEBSITE,
      T.NEXT_0,
      T.NEXT_1,
      T.NEXT_2,
      T.SCOPE_CLICK_1,
      T.SCOPE_CLICK_2,
      T.SCOPE_CLICK_3,
      T.NEXT_3,
      T.VIBE_SELECT,
      T.NEXT_4,
      T.SUBMIT,
    ];
    return clicks.some((c) => frame >= c && frame < c + 8);
  }, [frame, T]);

  return (
    <AbsoluteFill className="bg-white">
      <BackgroundGrid />

      <style>{`
                * { transition: none !important; animation: none !important; -webkit-font-smoothing: antialiased; }
                .focus-layer { transform-style: preserve-3d; backface-visibility: hidden; will-change: transform; }
            `}</style>

      <div
        className="absolute inset-0 flex items-center justify-center focus-layer"
        style={{
          transform: `translate3d(${Math.round(smoothCamera.x)}px, ${Math.round(smoothCamera.y)}px, 0) scale(${smoothCamera.z.toFixed(4)})`,
        }}
      >
        <div
          style={{
            transform: "scale(0.85) translate3d(0,0,0)",
            width: "1200px",
          }}
          className="focus-layer"
        >
          <ContactForm initialStepIndex={stepIndex} initialState={formState} />
        </div>

        <div
          style={{
            position: "absolute",
            top: "50%",
            left: "50%",
            transform: `translate3d(${Math.round(mouse.x)}px, ${Math.round(mouse.y)}px, 0)`,
            zIndex: 1000,
            marginTop: -12,
            marginLeft: -6,
          }}
          className="focus-layer"
        >
          <MouseCursor isClicking={isClicking} x={0} y={0} />
        </div>
      </div>

      {/* Logo HUD */}
      <div className="absolute top-28 left-28 z-50 focus-layer">
        <div className="w-40 h-40 bg-black rounded-[3.5rem] flex items-center justify-center shadow-2xl">
          <Img src={IconWhite} className="w-24 h-24" />
        </div>
      </div>

      <AbsoluteFill
        className="bg-white pointer-events-none"
        style={{
          opacity: interpolate(frame, [0, 15], [1, 0], {
            extrapolateRight: "clamp",
          }),
        }}
      />
    </AbsoluteFill>
  );
};