const roleDb = require("../db/role.db");
const { setResponse } = require("../helpers/utils");

module.exports = {
  getAllRoles: async (req, res) => {
    try {
      const { search } = req.query;
      const roles = await roleDb.getAllRolesDb(search || '');

      return res.status(200).json(setResponse(roles, 'Roles retrieved successfully', 200));
    } catch (err) {
      return res.status(err.statusCode || 500).json(
        setResponse([], err.message || 'Failed to retrieve roles', err.statusCode || 500)
      );
    }
  },

  getRolesById: async (req, res, next) => {
    try {
      const { id } = req.params;

      if (!id) {
        return res.status(400).json(setResponse(null, "Role ID is required", 400));
      }

      const role = await roleDb.getRoleByIdDb(id);

      if (!role) {
        return res.status(404).json(setResponse(null, "Role not found", 404));
      }

      return res.status(200).json(setResponse(role, "Role retrieved successfully", 200));
    } catch (err) {
      next(err);
    }
  },

  createRoles: async (req, res, next) => {
    try {
      let { role_name, role_description, role_level, updated_by} = req.body;

      if (!role_name || role_level === undefined || role_level === null) {
        return res.status(400).json(
          setResponse(
            null,
            "Please provide role_name and role_level",
            400
          )
        );
      }

      const level = parseInt(role_level);
      if (isNaN(level)) {
        return res.status(400).json(
          setResponse(
            null,
            "role_level must be a number",
            400
          )
        );
      }

      const dataToCreate = {
        role_name,
        role_description,
        updated_by,
        role_level: level,
      };

      Object.keys(dataToCreate).forEach(
        (key) => dataToCreate[key] === undefined && delete dataToCreate[key]
      );

      const insertedId = await roleDb.createRoleDb(dataToCreate);
      
      const newRole = insertedId
        ? await roleDb.getRoleByIdDb(insertedId)
        : { role_id: null, ...dataToCreate }; 

      return res.status(201).json(setResponse(newRole, "Role has been created!", 201));
    } catch (err) {
      next(err);
    }
  },

  updateRoles: async (req, res, next) => {
    try {
      const { id } = req.params;
      const { role_name, role_description, role_level, updated_by } = req.body;
  
      if (!id) {
        return res.status(400).json(setResponse(null, "Role ID is required", 400));
      }
  
      const dataToUpdate = {};
  
      if (role_name) dataToUpdate.role_name = role_name;
  
      if (Object.prototype.hasOwnProperty.call(req.body, "role_description")) {
        dataToUpdate.role_description = role_description;
      }
  
      if (role_level !== undefined && role_level !== null) {
        const level = parseInt(role_level);
        if (isNaN(level)) {
          return res.status(400).json(setResponse(null, "role_level must be a number", 400));
        }
        dataToUpdate.role_level = level;
      }
  
      if (updated_by) dataToUpdate.updated_by = updated_by;
  
      if (Object.keys(dataToUpdate).length === 0) {
        return res.status(400).json(setResponse(null, "No valid data provided for update", 400));
      }
  
      const existingRole = await roleDb.getRoleByIdDb(id);
      if (!existingRole || existingRole.length === 0) {
        return res.status(404).json(setResponse(null, "Role not found", 404));
      }
  
      await roleDb.updateRoleDb(id, dataToUpdate);
  
      const updatedRole = await roleDb.getRoleByIdDb(id);
  
      return res.status(200).json(setResponse(updatedRole, "Role has been updated successfully", 200));
    } catch (err) {
      next(err);
    }
  },
  

  deleteRoles: async (req, res, next) => {
    try {
      const { id } = req.params;
      const deletedBy = req.user?.id || 1; 

      if (!id) {
        return res.status(400).json(setResponse(null, "Role ID is required", 400));
      }

      const existingRole = await roleDb.getRoleByIdDb(id);
      if (!existingRole) {
        return res.status(404).json(setResponse(null, "Role not found", 404));
      }

      await roleDb.deleteRoleDb(id, deletedBy);

      return res.status(200).json(
        setResponse(
          null,
          "Role has been soft deleted successfully",
          200
        )
      );
    } catch (err) {
      next(err);
    }
  },
};