package it.bgates.remotebe.controller;

import it.bgates.remotebe.controller.beans.FilterBean;
import it.bgates.remotebe.entities.Phone;
import it.bgates.remotebe.exception.InsufficientCreditException;
import it.bgates.remotebe.exception.NotFoundException;
import it.bgates.remotebe.exception.PermissionDeniedException;
import it.bgates.remotebe.exception.UserNotFoundException;
import it.bgates.remotebe.service.PhoneService;
import lombok.RequiredArgsConstructor;
import org.springframework.http.HttpStatus;
import org.springframework.http.ProblemDetail;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.security.Principal;
import java.util.List;

import static org.springframework.http.HttpStatus.*;
import static org.springframework.http.ProblemDetail.forStatus;

@RestController
@RequestMapping("/phones")
@RequiredArgsConstructor
public class PhoneController {

    private final PhoneService phoneService;

    /**
     * Retrieves a list of phones associated with a specific device ID.
     *
     * @param id the unique identifier of the device whose associated phones are to be retrieved
     * @param principal the security principal of the currently authenticated user
     * @return a ResponseEntity containing a list of phones associated with the specified device ID;
     *         returns a 412 status if the user is not found or a 404 status if the device or its phones are not found
     */
    @GetMapping("/{id}")
    public ResponseEntity<List<Phone>> getDevicePhones(@PathVariable Integer id, Principal principal) {
        try {
            List<Phone> phones = phoneService.getPhonesByDeviceId(id, principal);
            return ResponseEntity.ok(phones);
        } catch (UserNotFoundException e) {
            return ResponseEntity.status(PRECONDITION_FAILED).build();
        } catch(NotFoundException e) {
            return ResponseEntity.status(NOT_FOUND).build();
        }
    }

    /**
     * Adds a new phone entity associated with the authenticated user.
     *
     * @param phone the phone entity to be added
     *              the phone entity should contain the device (at least the "id" field) to
     *              which the phone will be associated
     * @param principal  the security principal of the currently authenticated user
     * @return a ResponseEntity containing the added phone entity if successful;
     *         returns a 500 status with error details if an InsufficientCreditException occurs,
     *         a 412 status if the user is not found, or a 500 status for other exceptions
     **/
    @PostMapping("")
    public ResponseEntity<Phone> addPhone(@RequestBody Phone phone, Principal principal) {
        try {
            return ResponseEntity.ok(phoneService.addPhone(phone, principal));
        } catch (InsufficientCreditException ex) {
            ProblemDetail pd = forStatus(500);
            pd.setDetail(ex.getMessage());
            return ResponseEntity.of(pd).build();
        } catch (UserNotFoundException e) {
            return ResponseEntity.status(PRECONDITION_FAILED).build();
        } catch (Exception e) {
            ProblemDetail pd = forStatus(HttpStatus.INTERNAL_SERVER_ERROR);
            pd.setDetail(e.getMessage());
            return ResponseEntity.of(pd).build();
        }
    }

    /**
     * Deletes the phone entities associated with a specified id.
     * The service checks if the current user is authorized to access the device
     * that has the phone.  Throws exception if not, else mark the phone number
     * for deletion and synchronization.
     * On next send-configuration, the phone is removed from the device using
     * the SMS delete command, and the phone is remove ONLY IF it has
     * from and to dates set (temporary number).
     *
     * @param id the unique identifier of the phone to be deleted
     * @param principal the security principal of the currently authenticated user
     * @return a ResponseEntity containing a boolean value indicating the success of the deletion;
     *         returns a 412 status if the user is not found,
     *         a 404 status if the device or phones are not found,
     *         or a 500 status with error details for a permission denial
     */

    @DeleteMapping("/{id}")
    public ResponseEntity<Boolean> deleteDevicePhones(@PathVariable Integer id, Principal principal) {
        try {
            boolean res = phoneService.deletePhones(id, principal);
            return ResponseEntity.ok(res);
        } catch (UserNotFoundException e) {
            return ResponseEntity.status(PRECONDITION_FAILED).build();
        } catch(NotFoundException e) {
            return ResponseEntity.status(NOT_FOUND).build();
        } catch (PermissionDeniedException e) {
            ProblemDetail pd = forStatus(HttpStatus.INTERNAL_SERVER_ERROR);
            pd.setDetail(e.getMessage());
            return ResponseEntity.of(pd).build();
        }
    }

    /**
     * Filters a list of phones based on the specified device ID and optional filter criteria.
     *
     * @param deviceId the unique identifier of the device to filter phones for
     * @param filterBean the filter criteria for phones; can be null if no filtering is required
     * @param principal the security principal of the currently authenticated user
     * @return a ResponseEntity containing the list of filtered phones if successful
     */
    @PostMapping("/filter/{deviceId}")
    public ResponseEntity<List<Phone>> filter(
            @PathVariable() Integer deviceId,
            @RequestBody(required = false) FilterBean filterBean,
            Principal principal
    ) {
        try {
            String filter = (filterBean != null) ? filterBean.getFilter() : null;
            List<Phone> phones = phoneService.filter(deviceId, filter, principal);
            return ResponseEntity.ok(phones);
        } catch (UserNotFoundException e) {
            return ResponseEntity.status(PRECONDITION_FAILED).build();
        }
    }

    /**
     * Deactivates a phone associated with the specified ID.
     * The service ensures that the authenticated user has the necessary permissions
     * to deactivate the phone. If successful, the phone will no longer be active.
     *
     * @param id the unique identifier of the phone to be deactivated
     * @param principal the security principal of the currently authenticated user
     * @return a ResponseEntity containing a boolean value indicating whether the deactivation was successful;
     *         returns a 412 status if the user is not found, or a 404 status if the phone is not found
     */
    @GetMapping("/deactivate/{id}")
    public ResponseEntity<Boolean> deactivatePhone(@PathVariable Integer id, Principal principal) {
        try {
            Boolean res = phoneService.deactivatePhone(id, principal);
            return ResponseEntity.ok(res);
        } catch (UserNotFoundException e) {
            return ResponseEntity.status(PRECONDITION_FAILED).build();
        } catch (NotFoundException e) {
            return ResponseEntity.status(NOT_FOUND).build();
        } catch (PermissionDeniedException e) {
            return ResponseEntity.status(UNAUTHORIZED).build();
        }
    }

    /**
     * Activates a phone associated with the specified ID.
     *
     * @param id         the unique identifier of the phone to be activated.
     * @param principal  the authenticated user making the request.
     * @return           a ResponseEntity containing a Boolean indicating the success of the activation,
     *                   or an appropriate HTTP status if an error occurs.
     */
    @GetMapping("/activate/{id}")
    public ResponseEntity<Boolean> activatePhone(@PathVariable Integer id, Principal principal) {
        try {
            Boolean res = phoneService.activatePhone(id, principal);
            return ResponseEntity.ok(res);
        } catch (UserNotFoundException e) {
            return ResponseEntity.status(PRECONDITION_FAILED).build();
        } catch (NotFoundException e) {
            return ResponseEntity.status(NOT_FOUND).build();
        } catch (PermissionDeniedException e) {
            return ResponseEntity.status(UNAUTHORIZED).build();
        }
    }
}