package org.ros.chatto.controller;

import java.security.Principal;
import java.time.Instant;
import java.util.List;
import java.util.Optional;

import javax.validation.Valid;

import com.spencerwi.either.Result;

import org.ros.chatto.dto.AdminUserDTO;
import org.ros.chatto.dto.ChatMessageDTO;
import org.ros.chatto.dto.ReencryptionDTO;
import org.ros.chatto.service.AdminService;
import org.ros.chatto.service.ChatService;
import org.ros.chatto.service.UserDTOSpec;
import org.ros.chatto.service.UserService;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import lombok.RequiredArgsConstructor;

@RestController
@RequestMapping("/api/admin")
@RequiredArgsConstructor
public class AdminRESTController {
	private final ChatService chatService;

	private final UserService userService;

	private final AdminService adminService;

	@PostMapping(value = "/post/re-encrypt", consumes = { "application/json" })
	public ResponseEntity<ReencryptionDTO> reencryptMessages(
			@RequestBody @Valid List<ReencryptionDTO> reencryptionDTOs,
			Principal principal) {
		if (reencryptionDTOs.size() > 0) {
			chatService.reencryptMessages(reencryptionDTOs);
		}
		return new ResponseEntity<ReencryptionDTO>(HttpStatus.OK);
	}

	@GetMapping(value = "/get/messages/{userName}")
	public List<ReencryptionDTO> sendAllMessages(@PathVariable String userName,
			Principal principal) {
		List<ReencryptionDTO> reencryptionDTOs = chatService
				.getAllMessagesForReencryption(principal.getName(), userName);
		return reencryptionDTOs;
	}

	@GetMapping(value = "/get/messages/{userName}/{lastMessageTime}")
	public List<ChatMessageDTO> sendNewMessages(@PathVariable String userName,
			@PathVariable Instant lastMessageTime, Principal principal) {
		List<ChatMessageDTO> chatMessageDTOs = chatService
				.getNewMessages(principal.getName(), userName, lastMessageTime);
		return chatMessageDTOs;
	}

	@GetMapping("/get/users")
	public List<AdminUserDTO> getUsers(Principal principal,
			@RequestParam Optional<String> select) {
		if (select.isPresent()) {
			switch (select.get()) {
			case "all":
				return adminService.getUsers("", UserDTOSpec.ALL_USERS);

			case "regular":
				return adminService.getUsers("", UserDTOSpec.REGULAR_USERS);

			}
		}
		return adminService.getUsers(principal.getName(),
				UserDTOSpec.OTHER_USERS);
	}

	@DeleteMapping("/delete/users/{userName}")
	public ResponseEntity<?> deleteUser(@PathVariable String userName) {
		Result<Void> res = adminService.deleteUser(userName);
		if (res.isOk()) {
			return ResponseEntity.ok()
					.body("Deleted User with name - " + userName);
		} else {
			return ResponseEntity.badRequest().body(
					"An error occured while trying to delete user with name - "
							+ userName);
		}
	}
}