import { Router, Request, Response } from 'express';
import { Target } from '../models/Target.js';
import { logger } from '../utils/logger.js';

export const targetsRouter = Router();

// Get all targets
targetsRouter.get('/', async (req: Request, res: Response) => {
  try {
    const targets = await Target.find()
      .sort({ updatedAt: -1 })
      .lean();
    
    // Add profile count
    const targetsWithCount = targets.map(t => ({
      ...t,
      id: t._id,
      profile_count: t.profiles?.length || 0,
    }));
    
    res.json(targetsWithCount);
  } catch (error) {
    logger.error('Error fetching targets:', error);
    res.status(500).json({ error: 'Failed to fetch targets' });
  }
});

// Get single target with profiles
targetsRouter.get('/:id', async (req: Request, res: Response) => {
  try {
    const { id } = req.params;
    const target = await Target.findById(id).lean();
    
    if (!target) {
      res.status(404).json({ error: 'Target not found' });
      return;
    }
    
    res.json({
      ...target,
      id: target._id,
      profiles: target.profiles?.map(p => ({
        ...p,
        id: p._id,
        target_id: target._id,
        profile_url: p.profileUrl,
        profile_data: p.profileData ? JSON.stringify(p.profileData) : null,
        last_scraped: p.lastScraped,
        created_at: p.createdAt,
      })) || [],
    });
  } catch (error) {
    logger.error('Error fetching target:', error);
    res.status(500).json({ error: 'Failed to fetch target' });
  }
});

// Create target
targetsRouter.post('/', async (req: Request, res: Response) => {
  try {
    const { name, notes } = req.body;
    
    if (!name) {
      res.status(400).json({ error: 'Name is required' });
      return;
    }
    
    const target = new Target({ name, notes, profiles: [] });
    await target.save();
    
    logger.info(`Created target: ${name} (${target._id})`);
    res.status(201).json({
      ...target.toObject(),
      id: target._id,
      profile_count: 0,
    });
  } catch (error) {
    logger.error('Error creating target:', error);
    res.status(500).json({ error: 'Failed to create target' });
  }
});

// Update target
targetsRouter.put('/:id', async (req: Request, res: Response) => {
  try {
    const { id } = req.params;
    const { name, notes } = req.body;
    
    const target = await Target.findByIdAndUpdate(
      id,
      { name, notes },
      { new: true }
    ).lean();
    
    if (!target) {
      res.status(404).json({ error: 'Target not found' });
      return;
    }
    
    res.json({ ...target, id: target._id });
  } catch (error) {
    logger.error('Error updating target:', error);
    res.status(500).json({ error: 'Failed to update target' });
  }
});

// Delete target
targetsRouter.delete('/:id', async (req: Request, res: Response) => {
  try {
    const { id } = req.params;
    const result = await Target.findByIdAndDelete(id);
    
    if (!result) {
      res.status(404).json({ error: 'Target not found' });
      return;
    }
    
    logger.info(`Deleted target: ${id}`);
    res.json({ success: true });
  } catch (error) {
    logger.error('Error deleting target:', error);
    res.status(500).json({ error: 'Failed to delete target' });
  }
});

// Add profile to target
targetsRouter.post('/:id/profiles', async (req: Request, res: Response) => {
  try {
    const { id } = req.params;
    const { platform, username, profile_url } = req.body;
    
    if (!platform) {
      res.status(400).json({ error: 'Platform is required' });
      return;
    }
    
    const target = await Target.findById(id);
    if (!target) {
      res.status(404).json({ error: 'Target not found' });
      return;
    }
    
    const newProfile = {
      platform,
      username: username || undefined,
      profileUrl: profile_url || undefined,
      createdAt: new Date(),
    };
    
    target.profiles.push(newProfile as any);
    await target.save();
    
    const addedProfile = target.profiles[target.profiles.length - 1];
    
    logger.info(`Added ${platform} profile to target ${id}`);
    res.status(201).json({
      id: addedProfile._id,
      target_id: id,
      platform: addedProfile.platform,
      username: addedProfile.username,
      profile_url: addedProfile.profileUrl,
      created_at: addedProfile.createdAt,
    });
  } catch (error) {
    logger.error('Error adding profile:', error);
    res.status(500).json({ error: 'Failed to add profile' });
  }
});

// Delete profile
targetsRouter.delete('/:id/profiles/:profileId', async (req: Request, res: Response) => {
  try {
    const { id, profileId } = req.params;
    
    const target = await Target.findById(id);
    if (!target) {
      res.status(404).json({ error: 'Target not found' });
      return;
    }
    
    const profileIndex = target.profiles.findIndex(
      p => p._id.toString() === profileId
    );
    
    if (profileIndex === -1) {
      res.status(404).json({ error: 'Profile not found' });
      return;
    }
    
    target.profiles.splice(profileIndex, 1);
    await target.save();
    
    logger.info(`Deleted profile ${profileId} from target ${id}`);
    res.json({ success: true });
  } catch (error) {
    logger.error('Error deleting profile:', error);
    res.status(500).json({ error: 'Failed to delete profile' });
  }
});