"use client";

import { useState, useEffect } from "react";
import { createPortal } from "react-dom";
import { TypeSelector } from "./TypeSelector";
import { FreshIdeaSetup } from "./FreshIdeaSetup";
import { ChatImportSetup } from "./ChatImportSetup";
import { CodeImportSetup } from "./CodeImportSetup";
import { MigrateSetup } from "./MigrateSetup";

export type CreationMode = "fresh" | "chat-import" | "code-import" | "migration";

interface CreateProjectFlowProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  workspace: string;
}

type Step = "select-type" | "setup";

export function CreateProjectFlow({ open, onOpenChange, workspace }: CreateProjectFlowProps) {
  const [step, setStep] = useState<Step>("setup");
  const [mode, setMode] = useState<CreationMode | null>("fresh");

  useEffect(() => {
    if (open) {
      setStep("setup");
      setMode("fresh");
    }
  }, [open]);

  useEffect(() => {
    if (!open) return;
    const handler = (e: KeyboardEvent) => { if (e.key === "Escape") onOpenChange(false); };
    window.addEventListener("keydown", handler);
    return () => window.removeEventListener("keydown", handler);
  }, [open, onOpenChange]);

  if (!open) return null;

  const handleSelectType = (selected: CreationMode) => {
    setMode(selected);
    setStep("setup");
  };

  const handleBack = () => {
    setStep("select-type");
    setMode(null);
  };

  const setupProps = { workspace, onClose: () => onOpenChange(false), onBack: handleBack };

  return createPortal(
    <>
      <style>{`
        @keyframes vibn-fadeIn { from { opacity:0; } to { opacity:1; } }
        @keyframes vibn-slideUp { from { opacity:0; transform:translateY(14px); } to { opacity:1; transform:translateY(0); } }
        @keyframes vibn-spin { to { transform:rotate(360deg); } }
      `}</style>

      {/* Backdrop */}
      <div
        onClick={() => onOpenChange(false)}
        style={{
          position: "fixed", inset: 0, zIndex: 50,
          background: "rgba(26,26,26,0.38)",
          animation: "vibn-fadeIn 0.15s ease",
        }}
      />

      {/* Modal container */}
      <div style={{
        position: "fixed", inset: 0, zIndex: 51,
        display: "flex", alignItems: "center", justifyContent: "center",
        padding: 24, pointerEvents: "none",
      }}>
        <div
          onClick={e => e.stopPropagation()}
          style={{
            background: "#fff", borderRadius: 16,
            boxShadow: "0 12px 48px rgba(26,26,26,0.16)",
            width: "100%",
            maxWidth: 520,
            fontFamily: "var(--font-inter), ui-sans-serif, sans-serif",
            pointerEvents: "all",
            animation: "vibn-slideUp 0.18s cubic-bezier(0.4,0,0.2,1)",
            transition: "max-width 0.2s ease",
            overflow: "hidden",
          }}
        >
          {step === "select-type" && (
            <TypeSelector
              onSelect={handleSelectType}
              onClose={() => onOpenChange(false)}
            />
          )}
          {step === "setup" && mode === "fresh" && <FreshIdeaSetup {...setupProps} />}
          {step === "setup" && mode === "chat-import" && <ChatImportSetup {...setupProps} />}
          {step === "setup" && mode === "code-import" && <CodeImportSetup {...setupProps} />}
          {step === "setup" && mode === "migration" && <MigrateSetup {...setupProps} />}
        </div>
      </div>
    </>,
    document.body
  );
}