package ru.soune.nocopy.controller;

import jakarta.servlet.http.HttpServletRequest;
import lombok.RequiredArgsConstructor;
import org.springframework.http.ResponseEntity;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.web.bind.annotation.*;
import ru.soune.nocopy.dto.BaseResponse;
import ru.soune.nocopy.dto.MessageCode;
import ru.soune.nocopy.dto.register.ChangePasswordRequest;
import ru.soune.nocopy.dto.register.RegAnswer;
import ru.soune.nocopy.dto.register.RegRequest;
import ru.soune.nocopy.dto.tarriff.TariffInfoDTO;
import ru.soune.nocopy.dto.user.UserDTO;
import ru.soune.nocopy.dto.user.UserRequest;
import ru.soune.nocopy.entity.tarif.Tariff;
import ru.soune.nocopy.entity.tarif.TariffInfo;
import ru.soune.nocopy.entity.user.User;
import ru.soune.nocopy.exception.InvalidUserEmail;
import ru.soune.nocopy.exception.NotValidFieldException;
import ru.soune.nocopy.exception.UserNotFoundException;
import ru.soune.nocopy.mapper.UserMapper;
import ru.soune.nocopy.repository.UserRepository;
import ru.soune.nocopy.service.file.FileStatsService;
import ru.soune.nocopy.service.tariff.TariffService;
import ru.soune.nocopy.service.user.UserService;
import ru.soune.nocopy.util.JwtUtil;

import java.util.Arrays;
import java.util.Map;

@RestController
@RequestMapping("v1/api/user")
@RequiredArgsConstructor
public class UserController {

    private final UserRepository userRepository;

    private final UserService userService;

    private final UserMapper userMapper;

    private final PasswordEncoder passwordEncoder;

    private final TariffService tariffService;

    private final FileStatsService fileStatsService;

    private final JwtUtil jwtUtil;

    private final HttpServletRequest httpServletRequest;


    @GetMapping
    public ResponseEntity<UserDTO> getUser(@RequestParam("email") String email) {
        User user = userRepository.findByEmail(email);

        if (user != null) {
            UserDTO userDTO = userMapper.toDTO(user);
            userDTO.setEmail(email);
            userDTO.setFullName(user.getFullName());
            userDTO.setVerifiedStatus(user.getVerificationStatus());

            if (user.getCompany() != null) {
                userDTO.setCompany(user.getCompany().getCompanyName());
            }

            if (user.canManageCompanySettings() || user.canLogin() && user.getCompany() == null) {
                userDTO.setTariffs(tariffService.getTariffByAccountType(user));

                Long fileOnDisk = user.canManageCompanySettings() ?
                        fileStatsService.calculateCompanyFileSize(user.getId()):
                        fileStatsService.calculateUserFileSize(user.getId());

                Integer filesCount =  user.canManageCompanySettings() ?
                        fileStatsService.filesCompanyCount(user.getId()):
                        fileStatsService.filesUserCount(user.getId());

                TariffInfo personalTariffInfo;

                if (user.getCompany() == null) {
                    personalTariffInfo = user.getPersonalTariffInfo();
                } else {
                    personalTariffInfo = user.getCompany().getTariffInfo();
                }

                Tariff tariff = personalTariffInfo.getTariff();

                TariffInfoDTO infoDTO = TariffInfoDTO.builder().tokens(personalTariffInfo.getTokens())
                        .id(personalTariffInfo.getId())
                        .tariffName(tariff.getName())
                        .status(personalTariffInfo.getStatus().name())
                        .tariffId(tariff.getId())
                        .currentFileCounts(filesCount)
                        .maxFileCounts(tariff.getMaxFilesCount())
                        .currentFileOnDisk(fileOnDisk)
                        .maxFileOnDisk(tariff.getDiskSize())
                        .startTariff(personalTariffInfo.getStartTariff())
                        .endTariff(personalTariffInfo.getEndTariff())
                        .tokens(personalTariffInfo.getTokens() + personalTariffInfo.getBoughtTokens())
                        .build();

                userDTO.setTariffInfo(infoDTO);
            }

            userDTO.setPhone(user.getPhone());
            userDTO.setGenderType(user.getGenderType());
            userDTO.setBirthday(user.getBirthday());
            userDTO.setCreatedAt(user.getCreatedAt());
            userDTO.setActive(user.isActive());
            userDTO.setPermission(user.getUserPermissions());

            return ResponseEntity.ok(userDTO);
        }

        return ResponseEntity.notFound().build();
    }

    //TODO fix mapper,doesnot exist all fields
    @PostMapping("/change-password")
    public ResponseEntity<UserDTO> updateUser(@RequestBody ChangePasswordRequest changePasswordRequest) {
        Long userId = (Long) httpServletRequest.getAttribute("userId");
        User user = userService.getUserById(userId).orElse(null);

        if (user == null) {
            throw  new UserNotFoundException("User not found by id: " + userId);
        }

        if (!changePasswordRequest.getEmail().equals(user.getEmail())) {
            throw new InvalidUserEmail("Email is not valid: " + changePasswordRequest.getEmail() + "not found");
        }

        User updateUser = userService.changePassword(user, changePasswordRequest);

        return ResponseEntity.ok(userMapper.toDTO(updateUser));
    }

    @PatchMapping("/user-update")
    public ResponseEntity<UserDTO> updateUser(@RequestBody UserRequest userRequest) {
        Long userId = (Long) httpServletRequest.getAttribute("userId");
        User user = userService.getUserById(userId).orElse(null);

        if (user == null) {
            throw  new UserNotFoundException("User not found by id: " + userId);
        }

        return ResponseEntity.ok(userService.updateUser(userRequest, user));
    }

    @PostMapping("/create-user")
    public ResponseEntity<?> addUser(@RequestBody RegRequest registerRequest) {

        if (userRepository.existsByEmail(registerRequest.getEmail()) ||
                userRepository.existsByPhone(registerRequest.getPhone())) {
            RegAnswer regAnswer = new RegAnswer();
            regAnswer.setFieldErrors(Arrays.asList(Map.of("email", registerRequest.getEmail())));
            regAnswer.setFieldErrors(Arrays.asList(Map.of("phone", registerRequest.getPhone())));

            throw new NotValidFieldException("User already exists with email:" + registerRequest.getEmail() + " or phone: " +
                    registerRequest.getPhone(), new BaseResponse(2,
                    MessageCode.REG_EMAIL_OR_PHONE_EXISTS.getCode(),
                    MessageCode.REG_EMAIL_OR_PHONE_EXISTS.getDescription(), regAnswer));
        }

        User user = new User();
        user.setFullName(registerRequest.getFullName());
        user.setEmail(registerRequest.getEmail());
        user.setPassword(passwordEncoder.encode(registerRequest.getPassword()));
        user.setActive(true);
        user.setEmailVerified(true);

        if (registerRequest.getPhone() != null) {
            user.setPhone(registerRequest.getPhone());
        }

        User savedUser = userRepository.save(user);

        String authToken = jwtUtil.generateToken(savedUser.getId(), savedUser.getEmail());

        return ResponseEntity.ok().body(Map.of(
                "user", savedUser,
                "token", authToken));
    }

    @DeleteMapping("/delete-user/{userId}")
    public ResponseEntity<?> addUser(@PathVariable Long userId) {
        userRepository.deleteById(userId);
        return ResponseEntity.ok().body(Map.of("userId", userId, "deleted", "true"));
    }

}