package de.iwomm.propify_api.controller;

import de.iwomm.propify_api.dto.BulkDeletePropertyIdsDTO;
import de.iwomm.propify_api.dto.PropertyDTO;
import de.iwomm.propify_api.entity.Attachment;
import de.iwomm.propify_api.entity.Property;
import de.iwomm.propify_api.s3.S3Service;
import de.iwomm.propify_api.s3.UploadResponse;
import de.iwomm.propify_api.service.AttachmentService;
import de.iwomm.propify_api.service.PropertyService;
import jakarta.persistence.EntityNotFoundException;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.support.ServletUriComponentsBuilder;

import java.io.IOException;
import java.net.URI;
import java.util.*;

@RestController
@RequestMapping("/api/v1/properties")
public class PropertyController {
    private final PropertyService propertyService;
    private final AttachmentService attachmentService;
    private final S3Service s3service;

    public PropertyController(PropertyService propertyService, AttachmentService attachmentService, S3Service s3Service) {
        this.propertyService = propertyService;
        this.attachmentService = attachmentService;
        this.s3service = s3Service;
    }

    @GetMapping
    @PreAuthorize("hasAnyRole('ROLE_ADMIN', 'ROLE_USER')")
    public ResponseEntity<?> getAll() {
        List<PropertyDTO> propertiesDTO = propertyService.toDTOs(propertyService.findAll());

        return ResponseEntity
                .ok(propertiesDTO);
    }

    @GetMapping("/{id}")
    @PreAuthorize("hasAnyRole('ADMIN', 'USER')")
    public ResponseEntity<?> getById(@PathVariable UUID id) {
        try {
            return ResponseEntity
                    .ok(propertyService.findById(id).orElseThrow(EntityNotFoundException::new));
        } catch (EntityNotFoundException e) {
            return ResponseEntity
                    .notFound()
                    .build();
        } catch (Exception e) {
            return ResponseEntity
                    .internalServerError()
                    .build();
        }
    }

    @PostMapping("/{id}/upload")
    @PreAuthorize("hasRole('ADMIN')")
    public ResponseEntity<?> upload(@RequestParam("attachments") List<MultipartFile> files, @PathVariable UUID id) {
        List<String> messages = new ArrayList<>();

        if (files.isEmpty()) {
           return ResponseEntity
                   .ok()
                   .body(new UploadResponse(HttpStatus.BAD_REQUEST, "No attachments provided."));
        }

        Property property;

        try {
            property = propertyService.findById(id).orElseThrow(EntityNotFoundException::new);
        } catch (EntityNotFoundException e) {
            return ResponseEntity
                    .unprocessableEntity()
                    .build();
        }

        files.forEach(file -> {
            String originalFileName = file.getOriginalFilename();
            String uniqueFileName = id + "/" + UUID.randomUUID() + "_" + originalFileName;
            try {
                s3service.putObject("skamp", uniqueFileName, file);

                Attachment newAttachment = new Attachment();
                newAttachment.setProperty(property);
                newAttachment.setStoragePath(uniqueFileName);
                newAttachment.setFileName(originalFileName);
                this.attachmentService.save(newAttachment);

                property.getAttachments().add(newAttachment);

                messages.add("Successfully uploaded " + originalFileName + " to " + uniqueFileName);
            } catch (IOException e) {
                messages.add("Failed uploading " + originalFileName);
            }
        });

        propertyService.save(property);

        return ResponseEntity.ok(new UploadResponse(HttpStatus.OK, messages));
    }

    @PostMapping
    @PreAuthorize("hasRole('ADMIN')")
    public ResponseEntity<?> create(@RequestBody PropertyDTO propertyDTO) {
        try {
            Property newItem = propertyService.saveDTO(propertyDTO);

            URI location = ServletUriComponentsBuilder.fromCurrentRequest()
                    .path("/{id}")
                    .buildAndExpand(newItem.getId())
                    .toUri();

            return ResponseEntity
                    .created(location)
                    .body(newItem);
        } catch (Exception e) {
            return ResponseEntity
                    .internalServerError()
                    .build();
        }
    }

    @PatchMapping("/{id}")
    @PreAuthorize("hasRole('ADMIN')")
    public ResponseEntity<?> update(@PathVariable UUID id, @RequestBody PropertyDTO propertyDTO) {
        try {
            return ResponseEntity
                    .ok(propertyService.update(id, propertyDTO));
        } catch (EntityNotFoundException e) {
            return ResponseEntity
                    .notFound()
                    .build();
        } catch (Exception e) {
            return ResponseEntity
                    .internalServerError()
                    .build();
        }
    }

    @DeleteMapping("/{id}")
    @PreAuthorize("hasRole('ADMIN')")
    public ResponseEntity<?> delete(@PathVariable UUID id) {
        try {
            propertyService.deleteById(id);

            return ResponseEntity
                    .noContent()
                    .build();
        } catch (EntityNotFoundException e) {
            return ResponseEntity
                    .notFound()
                    .build();
        } catch (Exception e) {
            return ResponseEntity
                    .internalServerError()
                    .build();
        }
    }

    @PostMapping("/bulk-delete")
    @PreAuthorize("hasRole('ADMIN')")
    public ResponseEntity<?> deleteMany(@RequestBody BulkDeletePropertyIdsDTO propertiesDTO) {
        try {
            propertyService.deleteByIds(propertiesDTO);

            return ResponseEntity
                    .noContent()
                    .build();
        } catch (EntityNotFoundException e) {
            return ResponseEntity
                    .notFound()
                    .build();
        } catch (Exception e) {
            return ResponseEntity
                    .internalServerError()
                    .build();
        }
    }
}