"use client";

import { useEffect, useState } from "react";
import { useParams } from "next/navigation";
import { useSession } from "next-auth/react";
import { Loader2 } from "lucide-react";
import { FreshIdeaMain } from "@/components/project-main/FreshIdeaMain";
import { ChatImportMain } from "@/components/project-main/ChatImportMain";
import { CodeImportMain } from "@/components/project-main/CodeImportMain";
import { MigrateMain } from "@/components/project-main/MigrateMain";

interface Project {
  id: string;
  productName: string;
  name?: string;
  stage?: "discovery" | "architecture" | "building" | "active";
  creationMode?: "fresh" | "chat-import" | "code-import" | "migration";
  creationStage?: string;
  sourceData?: {
    chatText?: string;
    repoUrl?: string;
    liveUrl?: string;
    hosting?: string;
    description?: string;
  };
  analysisResult?: Record<string, unknown>;
  migrationPlan?: string;
}

export default function ProjectOverviewPage() {
  const params = useParams();
  const projectId = params.projectId as string;
  const { status: authStatus } = useSession();
  const [project, setProject] = useState<Project | null>(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    if (authStatus !== "authenticated") {
      if (authStatus === "unauthenticated") setLoading(false);
      return;
    }
    fetch(`/api/projects/${projectId}`)
      .then(r => r.json())
      .then(d => setProject(d.project))
      .catch(() => {})
      .finally(() => setLoading(false));
  }, [authStatus, projectId]);

  if (loading) {
    return (
      <div style={{ display: "flex", alignItems: "center", justifyContent: "center", height: "100%", fontFamily: "var(--font-inter), ui-sans-serif, sans-serif" }}>
        <Loader2 style={{ width: 24, height: 24, color: "#a09a90" }} className="animate-spin" />
      </div>
    );
  }

  if (!project) {
    return (
      <div style={{ display: "flex", alignItems: "center", justifyContent: "center", height: "100%", fontFamily: "var(--font-inter), ui-sans-serif, sans-serif", color: "#a09a90", fontSize: "0.88rem" }}>
        Project not found.
      </div>
    );
  }

  const projectName = project.productName || project.name || "Untitled";
  const mode = project.creationMode ?? "fresh";

  if (mode === "chat-import") {
    return (
      <ChatImportMain
        projectId={projectId}
        projectName={projectName}
        sourceData={project.sourceData}
        analysisResult={project.analysisResult as Parameters<typeof ChatImportMain>[0]["analysisResult"]}
      />
    );
  }

  if (mode === "code-import") {
    return (
      <CodeImportMain
        projectId={projectId}
        projectName={projectName}
        sourceData={project.sourceData}
        analysisResult={project.analysisResult}
        creationStage={project.creationStage}
      />
    );
  }

  if (mode === "migration") {
    return (
      <MigrateMain
        projectId={projectId}
        projectName={projectName}
        sourceData={project.sourceData}
        analysisResult={project.analysisResult}
        migrationPlan={project.migrationPlan}
        creationStage={project.creationStage}
      />
    );
  }

  // Default: "fresh" — wraps AtlasChat with decision banner
  return (
    <FreshIdeaMain
      projectId={projectId}
      projectName={projectName}
    />
  );
}