package com.example.nto.controller;

import com.example.nto.entity.Booking;
import com.example.nto.entity.Employee;
import com.example.nto.entity.Place;
import com.example.nto.service.BookingService;
import com.example.nto.service.EmployeeService;
import com.example.nto.service.PlaceService;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDate;
import java.util.*;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/api/{code}")
public class BookingController {

    private final EmployeeService employeeService;
    private final BookingService bookingService;
    private final PlaceService placeService;

    public BookingController(EmployeeService employeeService, BookingService bookingService, PlaceService placeService) {
        this.employeeService = employeeService;
        this.bookingService = bookingService;
        this.placeService = placeService;
    }

    @GetMapping("/auth")
    public ResponseEntity<Void> auth(@PathVariable String code) {
        Optional<Employee> employeeOpt = employeeService.findByCode(code);
        if (employeeOpt.isPresent()) {
            return ResponseEntity.ok().build();
        } else {
            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
        }
    }

    @GetMapping("/info")
    public ResponseEntity<Map<String, Object>> info(@PathVariable String code) {
        Optional<Employee> employeeOpt = employeeService.findByCode(code);
        if (employeeOpt.isEmpty()) return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();

        Employee employee = employeeOpt.get();

        Map<String, Object> response = new HashMap<>();
        response.put("name", employee.getName());
        response.put("photoUrl", employee.getPhotoUrl());

        Map<String, Map<String, Object>> bookingsMap = new HashMap<>();
        List<Booking> bookingList = bookingService.getBookingsByEmployee(employee);

        for (Booking b : bookingList) {
            String dateKey = b.getDate().toString();
            Map<String, Object> bookingData = new HashMap<>();
            bookingData.put("id", b.getId());
            bookingData.put("place", b.getPlace().getPlace());

            bookingsMap.put(dateKey, bookingData);
        }

        response.put("booking", bookingsMap);

        return ResponseEntity.ok(response);
    }

    @GetMapping("/booking")
    public ResponseEntity<Map<String, List<Map<String, Object>>>> availableBooking(@PathVariable String code) {
        Optional<Employee> employeeOpt = employeeService.findByCode(code);
        if (employeeOpt.isEmpty()) return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();

        Map<String, List<Map<String, Object>>> result = new LinkedHashMap<>();
        LocalDate today = LocalDate.now();
        List<Place> allPlaces = placeService.getAllPlaces();

        for (int i = 0; i < 4; i++) {
            LocalDate date = today.plusDays(i);
            List<Booking> bookings = bookingService.getBookingsByDate(date);

            Set<Long> bookedPlaceIds = bookings.stream()
                    .map(b -> b.getPlace().getId())
                    .collect(Collectors.toSet());

            List<Map<String, Object>> available = allPlaces.stream()
                    .filter(p -> !bookedPlaceIds.contains(p.getId()))
                    .map(p -> {
                        Map<String, Object> m = new HashMap<>();
                        m.put("id", p.getId());
                        m.put("place", p.getPlace());
                        return m;
                    })
                    .collect(Collectors.toList());

            result.put(date.toString(), available);
        }

        return ResponseEntity.ok(result);
    }

    @PostMapping("/book")
    public ResponseEntity<Void> book(@PathVariable String code, @RequestBody Map<String, String> body) {
        Optional<Employee> employeeOpt = employeeService.findByCode(code);
        if (employeeOpt.isEmpty()) return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
        Employee employee = employeeOpt.get();

        try {
            String dateStr = body.get("date");

            // поддерживаем все варианты ключей
            String placeIdStr = body.getOrDefault("placeID",
                    body.getOrDefault("placeId",
                            body.getOrDefault("place", null)));

            if (dateStr == null || placeIdStr == null) {
                return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
            }

            LocalDate date = LocalDate.parse(dateStr);
            Long placeId = Long.parseLong(placeIdStr);
            Place place = placeService.getPlaceById(placeId);

            if (bookingService.getBookingByEmployeeAndDate(employee, date).isPresent()) {
                return ResponseEntity.status(HttpStatus.CONFLICT).build();
            }

            if (bookingService.getBookingByDateAndPlace(date, place).isPresent()) {
                return ResponseEntity.status(HttpStatus.CONFLICT).build();
            }

            bookingService.createBooking(employee, place, date);
            return ResponseEntity.status(HttpStatus.CREATED).build();

        } catch (Exception e) {
            return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
        }
    }
}