const express = require('express');
const path = require('path');
const db = require('./db');

const app = express();
const PORT = process.env.PORT || 3000;

// Middleware
app.use(express.json());
app.use(express.static(path.join(__dirname, '../public')));

// API Routes

// Projects
app.get('/api/projects', async (req, res) => {
  try {
    const projects = await db.getAllProjects();
    res.json(projects);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.get('/api/projects/:id', async (req, res) => {
  try {
    const project = await db.getProject(req.params.id);
    if (!project) {
      res.status(404).json({ error: 'Project not found' });
    } else {
      res.json(project);
    }
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.post('/api/projects', async (req, res) => {
  try {
    const { name, description } = req.body;
    const project = await db.createProject(name, description);
    res.status(201).json(project);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.put('/api/projects/:id', async (req, res) => {
  try {
    const { name, description } = req.body;
    await db.updateProject(req.params.id, name, description);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.delete('/api/projects/:id', async (req, res) => {
  try {
    await db.deleteProject(req.params.id);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// Racks
app.get('/api/racks', async (req, res) => {
  try {
    const projectId = req.query.projectId || 1;
    const racks = await db.getAllRacks(projectId);
    res.json(racks);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.get('/api/racks/next-name', async (req, res) => {
  try {
    const projectId = req.query.projectId || 1;
    const prefix = req.query.prefix || 'RACK';
    const name = await db.getNextRackName(projectId, prefix);
    res.json({ name });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.post('/api/racks', async (req, res) => {
  try {
    const { projectId, name, x, y } = req.body;
    const rack = await db.createRack(projectId || 1, name, x, y);
    res.status(201).json(rack);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.put('/api/racks/:id/position', async (req, res) => {
  try {
    const { x, y } = req.body;
    await db.updateRackPosition(req.params.id, x, y);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.put('/api/racks/:id/name', async (req, res) => {
  try {
    const { name } = req.body;
    await db.updateRackName(req.params.id, name);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.delete('/api/racks/:id', async (req, res) => {
  try {
    await db.deleteRack(req.params.id);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// Device Types
app.get('/api/device-types', async (req, res) => {
  try {
    const types = await db.getAllDeviceTypes();
    res.json(types);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// Devices
app.get('/api/devices', async (req, res) => {
  try {
    const projectId = req.query.projectId || 1;
    const devices = await db.getAllDevices(projectId);
    res.json(devices);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.post('/api/devices', async (req, res) => {
  try {
    const { deviceTypeId, rackId, position, name } = req.body;
    const device = await db.createDevice(deviceTypeId, rackId, position, name);
    res.status(201).json(device);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.delete('/api/devices/:id', async (req, res) => {
  try {
    await db.deleteDevice(req.params.id);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.put('/api/devices/:id/rack', async (req, res) => {
  try {
    const { rackId, position } = req.body;
    await db.updateDeviceRack(req.params.id, rackId, position);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.put('/api/devices/:id/logical-position', async (req, res) => {
  try {
    const { x, y } = req.body;
    await db.updateDeviceLogicalPosition(req.params.id, x, y);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.put('/api/devices/:id/name', async (req, res) => {
  try {
    const { name } = req.body;
    await db.updateDeviceName(req.params.id, name);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.put('/api/devices/:id/rack-units', async (req, res) => {
  try {
    const { rackUnits } = req.body;
    await db.updateDeviceRackUnits(req.params.id, rackUnits);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.get('/api/devices/:id/used-ports', async (req, res) => {
  try {
    const ports = await db.getUsedPorts(req.params.id);
    res.json(ports);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// Connections
app.get('/api/connections', async (req, res) => {
  try {
    const projectId = req.query.projectId || 1;
    const connections = await db.getAllConnections(projectId);
    res.json(connections);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.post('/api/connections', async (req, res) => {
  try {
    const { sourceDeviceId, sourcePort, targetDeviceId, targetPort } = req.body;
    const connection = await db.createConnection(sourceDeviceId, sourcePort, targetDeviceId, targetPort);
    res.status(201).json(connection);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.put('/api/connections/:id/waypoints', async (req, res) => {
  try {
    const { waypoints, view } = req.body;
    await db.updateConnectionWaypoints(req.params.id, waypoints, view);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.put('/api/connections/:id', async (req, res) => {
  try {
    const { sourceDeviceId, sourcePort, targetDeviceId, targetPort } = req.body;
    await db.updateConnection(req.params.id, sourceDeviceId, sourcePort, targetDeviceId, targetPort);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

app.delete('/api/connections/:id', async (req, res) => {
  try {
    await db.deleteConnection(req.params.id);
    res.json({ success: true });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// Initialize database and start server
db.init()
  .then(() => {
    app.listen(PORT, () => {
      console.log(`Server running on http://localhost:${PORT}`);
    });
  })
  .catch((err) => {
    console.error('Failed to initialize database:', err);
    process.exit(1);
  });