const { Application } = require('../models');
const { v4: uuidv4 } = require('uuid');

exports.submitApplication = async (req, res) => {
  try {
    const {
      applicantName, email, phone, businessType, locationType,
      preferredLocation, city, state, experienceYears, investmentCapacity
    } = req.body;

    const applicationId = `APP-${new Date().getFullYear()}-${uuidv4().substring(0, 6).toUpperCase()}`;

    const application = await Application.create({
      applicationId,
      applicantName,
      email,
      phone,
      businessType,
      preferredLocation,
      city,
      state,
      experienceYears,
      investmentCapacity,
      currentStage: 'DD',
      overallStatus: 'Pending',
      progressPercentage: 0
    });

    res.status(201).json({
      success: true,
      message: 'Application submitted successfully',
      applicationId: application.applicationId
    });
  } catch (error) {
    console.error('Submit application error:', error);
    res.status(500).json({ success: false, message: 'Error submitting application' });
  }
};

exports.getApplications = async (req, res) => {
  try {
    const applications = await Application.findAll({
      order: [['createdAt', 'DESC']]
    });

    res.json({ success: true, applications });
  } catch (error) {
    console.error('Get applications error:', error);
    res.status(500).json({ success: false, message: 'Error fetching applications' });
  }
};

exports.getApplicationById = async (req, res) => {
  try {
    const { id } = req.params;

    const application = await Application.findOne({
      where: {
        [Op.or]: [
          { id },
          { applicationId: id }
        ]
      }
    });

    if (!application) {
      return res.status(404).json({ success: false, message: 'Application not found' });
    }

    res.json({ success: true, application });
  } catch (error) {
    console.error('Get application error:', error);
    res.status(500).json({ success: false, message: 'Error fetching application' });
  }
};

exports.takeAction = async (req, res) => {
  try {
    const { id } = req.params;
    const { action, comments, rating } = req.body;

    const application = await Application.findOne({
      where: {
        [Op.or]: [
          { id },
          { applicationId: id }
        ]
      }
    });

    if (!application) {
      return res.status(404).json({ success: false, message: 'Application not found' });
    }

    await application.update({
      overallStatus: action,
      updatedAt: new Date()
    });

    res.json({ success: true, message: 'Action taken successfully' });
  } catch (error) {
    console.error('Take action error:', error);
    res.status(500).json({ success: false, message: 'Error processing action' });
  }
};

exports.uploadDocuments = async (req, res) => {
  try {
    const { id } = req.params;
    const { documents } = req.body;

    const application = await Application.findOne({
      where: {
        [Op.or]: [
          { id },
          { applicationId: id }
        ]
      }
    });

    if (!application) {
      return res.status(404).json({ success: false, message: 'Application not found' });
    }

    await application.update({
      documents: documents,
      updatedAt: new Date()
    });

    res.json({ success: true, message: 'Documents uploaded successfully' });
  } catch (error) {
    console.error('Upload documents error:', error);
    res.status(500).json({ success: false, message: 'Error uploading documents' });
  }
};