package de.itsolutions.ticketsystem.controller;

import de.itsolutions.ticketsystem.entity.Comment;
import de.itsolutions.ticketsystem.entity.Ticket;
import de.itsolutions.ticketsystem.entity.User;
import de.itsolutions.ticketsystem.repository.CommentRepository;
import de.itsolutions.ticketsystem.repository.TicketRepository;
import de.itsolutions.ticketsystem.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.server.ResponseStatusException;

import java.util.List;
import java.util.Map;

/**
 * REST controller for managing comments on tickets.
 */
@RestController
@RequestMapping("/api/tickets/{ticketId}/comments")
public class CommentController {

    @Autowired
    private CommentRepository commentRepository;

    @Autowired
    private TicketRepository ticketRepository;

    @Autowired
    private UserRepository userRepository;

    /**
     * Retrieves all comments for a specific ticket.
     * @param ticketId The ID of the ticket.
     * @return A list of comments for the specified ticket.
     * @throws ResponseStatusException if the ticket is not found.
     */
    @GetMapping
    public List<Comment> getComments(@PathVariable Long ticketId) {
        if (!ticketRepository.existsById(ticketId)) {
            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Ticket not found");
        }
        return commentRepository.findByTicketIdOrderByCreatedAtAsc(ticketId);
    }

    /**
     * Adds a new comment to a ticket.
     * @param ticketId The ID of the ticket to add the comment to.
     * @param payload A map containing the comment text.
     * @return The newly created comment.
     * @throws ResponseStatusException if the text is empty, ticket is not found, or user is not found.
     */
    @PostMapping
    public Comment addComment(@PathVariable Long ticketId, @RequestBody Map<String, String> payload) {
        String text = payload.get("text");
        if (text == null || text.trim().isEmpty()) {
            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Text is required");
        }

        Ticket ticket = ticketRepository.findById(ticketId)
                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Ticket not found"));

        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        String email = auth.getName();
        User user = userRepository.findByEmail(email)
                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "User not found"));

        Comment comment = new Comment();
        comment.setText(text);
        comment.setTicket(ticket);
        comment.setAuthor(user);

        return commentRepository.save(comment);
    }
}