const { ConstitutionalChange, Outlet, User, Worknote } = require('../models');
const { v4: uuidv4 } = require('uuid');
const { Op } = require('sequelize'); // Required for Op.or

exports.submitRequest = async (req, res) => {
  try {
    const {
      outletId, changeType, currentConstitution, proposedConstitution,
      reason, effectiveDate, newEntityDetails
    } = req.body;

    const requestId = `CC-${Date.now()}-${uuidv4().substring(0, 4).toUpperCase()}`;

    const request = await ConstitutionalChange.create({
      requestId,
      outletId,
      dealerId: req.user.id,
      changeType,
      description: reason,
      currentConstitution,
      proposedConstitution,
      effectiveDate,
      newEntityDetails: JSON.stringify(newEntityDetails), // Store as JSON string
      currentStage: 'RBM Review',
      status: 'Pending',
      progressPercentage: 0,
      timeline: [{
        stage: 'Submitted',
        timestamp: new Date(),
        user: req.user.full_name, // Assuming req.user.full_name is available
        action: 'Request submitted'
      }]
    });

    res.status(201).json({
      success: true,
      message: 'Constitutional change request submitted successfully',
      requestId: request.requestId
    });
  } catch (error) {
    console.error('Submit constitutional change error:', error);
    res.status(500).json({ success: false, message: 'Error submitting request' });
  }
};

exports.getRequests = async (req, res) => {
  try {
    const where = {};
    if (req.user.role === 'Dealer') {
      where.dealerId = req.user.id;
    }

    const requests = await ConstitutionalChange.findAll({
      where,
      include: [
        {
          model: Outlet,
          as: 'outlet',
          attributes: ['code', 'name']
        },
        {
          model: User,
          as: 'dealer',
          attributes: ['full_name'] // Changed from 'name' to 'full_name' based on original code
        }
      ],
      order: [['createdAt', 'DESC']]
    });

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

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

    const request = await ConstitutionalChange.findOne({
      where: {
        [Op.or]: [
          { id },
          { requestId: id }
        ]
      },
      include: [
        {
          model: Outlet,
          as: 'outlet'
        },
        {
          model: User,
          as: 'dealer',
          attributes: ['full_name', 'email'] // Changed from 'name' to 'full_name'
        },
        {
          model: Worknote,
          as: 'worknotes' // Assuming Worknote model is associated as 'worknotes'
        }
      ]
    });

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

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

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

    const request = await ConstitutionalChange.findOne({
      where: {
        [Op.or]: [
          { id },
          { requestId: id }
        ]
      }
    });

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

    const timeline = [...request.timeline, {
      stage: 'Review',
      timestamp: new Date(),
      user: req.user.full_name, // Assuming req.user.full_name is available
      action,
      remarks: comments
    }];

    await request.update({
      status: action, // Assuming action directly maps to status (e.g., 'Approved', 'Rejected')
      timeline,
      updatedAt: new Date()
    });

    res.json({ success: true, message: `Request ${action.toLowerCase()} 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 request = await ConstitutionalChange.findOne({
      where: {
        [Op.or]: [
          { id },
          { requestId: id }
        ]
      }
    });

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

    await request.update({
      documents: documents, // Assuming documents is an array or object that can be stored directly
      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' });
  }
};