import express from "express";
import path from "path";
import { createServer as createViteServer } from "vite";
import { v4 as uuidv4 } from "uuid";

interface BrainstormIdea {
  id: string;
  sessionId: string;
  waveNumber: number;
  title: string;
  description: string;
  connectionToSeed: string;
  noveltyScore: number;
  parentIdeaId?: string;
  convertedToNoteId?: string;
  status: 'active' | 'dismissed' | 'converted';
  position?: { x: number; y: number };
}

interface BrainstormSession {
  id: string;
  seedIdea: string;
  sourceNoteId?: string;
  contextNoteIds?: string[];
  createdAt: string;
  updatedAt: string;
}

// In-memory store (Simulating Postgres for now)
const sessions: BrainstormSession[] = [];
const ideas: BrainstormIdea[] = [];

async function startServer() {
  const app = express();
  const PORT = 3000;

  app.use(express.json());

  // API Routes
  app.get("/api/health", (req, res) => {
    res.json({ status: "ok" });
  });

// 1. Create session
  app.post("/api/brainstorm/sessions", (req, res) => {
    const { seedIdea, sourceNoteId, contextNoteIds } = req.body;
    
    const session: BrainstormSession = {
      id: uuidv4(),
      seedIdea,
      sourceNoteId,
      contextNoteIds,
      createdAt: new Date().toISOString(),
      updatedAt: new Date().toISOString()
    };
    sessions.unshift(session);
    res.json(session);
  });

  // 2. Add ideas to session
  app.post("/api/brainstorm/:sessionId/ideas", (req, res) => {
    const { sessionId } = req.params;
    const { ideas: newIdeasData } = req.body;

    const session = sessions.find(s => s.id === sessionId);
    if (!session) return res.status(404).json({ error: "Session not found" });

    const newIdeas = newIdeasData.map((item: any) => ({
      id: item.id || uuidv4(),
      sessionId,
      waveNumber: item.waveNumber,
      title: item.title,
      description: item.description,
      connectionToSeed: item.connectionToSeed,
      noveltyScore: item.noveltyScore,
      parentIdeaId: item.parentIdeaId,
      status: 'active'
    }));

    newIdeas.forEach((i: any) => ideas.push(i));
    res.json(newIdeas);
  });

  // 3. Get all sessions
  app.get("/api/brainstorm/sessions", (req, res) => {
    res.json(sessions);
  });

  // 4. Get session with ideas
  app.get("/api/brainstorm/:sessionId", (req, res) => {
    const session = sessions.find(s => s.id === req.params.sessionId);
    if (!session) return res.status(404).json({ error: "Session not found" });
    const sessionIdeas = ideas.filter(i => i.sessionId === session.id);
    res.json({ session, ideas: sessionIdeas });
  });

  // 5. Update idea (position, status)
  app.patch("/api/brainstorm/ideas/:ideaId", (req, res) => {
    const index = ideas.findIndex(i => i.id === req.params.ideaId);
    if (index === -1) return res.status(404).json({ error: "Idea not found" });
    
    ideas[index] = { ...ideas[index], ...req.body };
    res.json(ideas[index]);
  });

  // Vite middleware for development
  if (process.env.NODE_ENV !== "production") {
    const vite = await createViteServer({
      server: { middlewareMode: true },
      appType: "spa",
    });
    app.use(vite.middlewares);
  } else {
    const distPath = path.join(process.cwd(), 'dist');
    app.use(express.static(distPath));
    app.get('*', (req, res) => {
      res.sendFile(path.join(distPath, 'index.html'));
    });
  }

  app.listen(PORT, "0.0.0.0", () => {
    console.log(`Server running on http://localhost:${PORT}`);
  });
}

startServer();