package com.mif13.authServer.controllers;

import com.mif13.authServer.dao.UsersDao;
import com.mif13.authServer.exception.InvalidPasswordException;
import com.mif13.authServer.exception.UserCreationException;
import com.mif13.authServer.model.User;
import java.util.Optional;
import java.util.regex.PatternSyntaxException;


import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.ModelAndView;

import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.media.Content;
import io.swagger.v3.oas.annotations.media.Schema;
import io.swagger.v3.oas.annotations.responses.ApiResponse;
import io.swagger.v3.oas.annotations.responses.ApiResponses;


@RestController
@RequestMapping(value = "users")
public class UserRestController {

    private final UsersDao usersRepo;

    @Autowired
    public UserRestController(UsersDao usersRepo) {
        this.usersRepo = usersRepo;
    }

    @Operation(summary = "Get user informations by id")
    @ApiResponses(value = {
        @ApiResponse(
            responseCode = "200",
            description = "Found the user",
            content = {
                @Content(
                    mediaType = "application/json",
                    schema = @Schema(implementation = User.class)
                ),
                @Content(
                    mediaType = "application/xml",
                    schema = @Schema(implementation = User.class)
                ),
                @Content(
                    mediaType = "text/html"
                )
            }),
        @ApiResponse(
            responseCode = "404",
            description = "User not found",
            content = {
                @Content()
            }
        )}
    )
    @GetMapping(value = "/{id}", produces = {MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_XML_VALUE})
    @CrossOrigin(origins = {"http://localhost", "http://192.168.75.68", "https://192.168.75.68"})
    public ResponseEntity<User> getUserAsJsonOrXml(@PathVariable String id) {
        ResponseEntity<User> response;

        Optional<User> optionalUser = usersRepo.get(id);
        if (optionalUser.isPresent()) {
            User user = optionalUser.get();
            response = new ResponseEntity<>(user, HttpStatus.OK);
            response.getHeaders().add("Access-Control-Allow-Methods","GET");
            response.getHeaders().add("Access-Control-Allow-Headers", "Authorization");
            response.getHeaders().add("Access-Control-Max-Age", "1728000");
            return response;
        } else {
            response = new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }

        return response;
    }


    @GetMapping(value = "/{id}", produces = MediaType.TEXT_HTML_VALUE)
    public ModelAndView getUserAsHtml(@PathVariable String id, Model model) {
        // "user" nom du template HTML (sans extension)
        ModelAndView modelAndView = new ModelAndView("user");

        Optional<User> optionalUser = usersRepo.get(id);
        if (optionalUser.isPresent()) {
            User user = optionalUser.get();

            // on initialise les variables du template
            model.addAttribute("user", user);

            modelAndView.setStatus(HttpStatus.OK);
        } else {
            model.addAttribute("id", id);

            modelAndView.setStatus(HttpStatus.NOT_FOUND);
        }

        return modelAndView;
    }

    private ResponseEntity<Void> createUser(User user) {
        ResponseEntity<Void> response;

        try {
            Optional<User> optionalUser = usersRepo.get(user.getLogin());
            if (optionalUser.isEmpty()) {
                usersRepo.save(user);
                response = new ResponseEntity<>(HttpStatus.CREATED);
            } else {
                response = new ResponseEntity<>(HttpStatus.FORBIDDEN);
            }
        } catch (PatternSyntaxException e) {
            e.printStackTrace();
            response = new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }

        return response;
    }

    @Operation(summary = "Create a new user")
    @ApiResponses(value = {
        @ApiResponse(
            responseCode = "201 Created",
            description = "User is correctely created",
            content = {
                @Content(
                    mediaType = "application/json",
                    schema = @Schema(implementation = User.class)
                ),
                @Content(
                    mediaType = "application/xml",
                    schema = @Schema(implementation = User.class)
                ),
                @Content(
                    mediaType = "text/html"
                )
            }),
        @ApiResponse(
            responseCode = "403 Forbidden",
            description = "User not created",
            content = {
                @Content()
            }
        ),
        @ApiResponse(
            responseCode = "500 Internal Server Error",
            description = "",
            content = {
                @Content()
            }
        )
    })
    @PostMapping(consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    public ResponseEntity<Void> createUserFromUrlEncoded(@RequestParam("login") String login,
        @RequestParam("password") String password) {
        ResponseEntity<Void> response;

        try {
            User user = new User(login, password);
            response = createUser(user);
        } catch (UserCreationException e) {
            e.printStackTrace();
            response = new ResponseEntity<>(HttpStatus.BAD_REQUEST);
        }
        return response;
    }

    /**
     * Cree un User a partir d'un JSON.
     *
     * /!\ Attention /!\
     * Renvoie 400 BAD_REQUEST si le login ou le password sont invalides
     * (et produit une HttpMessageNotReadableException)
     *
     * @param user JSON converti en User (converter de Spring)
     * @return contenu vide
     **/
    @PostMapping(consumes = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Void> createUserFromJson(@RequestBody User user) {
        return createUser(user);
    }


    @Operation(summary = "Modify password of a user by its id")
    @ApiResponses(value = {
        @ApiResponse(
            responseCode = "204 No Content",
            description = "Password is correctly modified",
            content = {
                @Content()
            }
        ),
        @ApiResponse(
            responseCode = "404 Not Found",
            description = "",
            content = {
                @Content()
            }
        ),
        @ApiResponse(
            responseCode = "500 Internal Server Error",
            description = "",
            content = {
                @Content()
            }
        )
    })
    @PutMapping("/{id}")
    public ResponseEntity<Void> modifyUserPassword(@PathVariable String id,
        @RequestParam("new_password") String newPassword) {
        ResponseEntity<Void> response;

        Optional<User> optionalUser = usersRepo.get(id);
        if (optionalUser.isPresent()) {
            User user = optionalUser.get();

            try {
                if (User.verifyPassword(newPassword)) {
                    user.setPassword(newPassword);
                    response = new ResponseEntity<>(HttpStatus.NO_CONTENT);
                } else {
                    throw new InvalidPasswordException("Password is too weak");
                }
            } catch (InvalidPasswordException e) {
                e.printStackTrace();
                response = new ResponseEntity<>(HttpStatus.BAD_REQUEST);
            }

        } else {
            response = new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }

        return response;
    }

    @Operation(summary = "Delete a user on the database, by its id")
    @ApiResponses(value = {
        @ApiResponse(
            responseCode = "204 No Content",
            description = "User deleted with success",
            content = {
                @Content()
            }
        ),
        @ApiResponse(
            responseCode = "404 Not Found",
            description = "",
            content = {
                @Content()
            }
        ),
        @ApiResponse(
            responseCode = "500 Internal Server Error",
            description = "",
            content = {
                @Content()
            }
        )
    })
    @DeleteMapping("/{id}")
    public ResponseEntity<Void> deleteUser(@PathVariable String id) {
        ResponseEntity<Void> response;

        Optional<User> optionalUser = usersRepo.get(id);
        if (optionalUser.isPresent()) {
            User user = optionalUser.get();
            usersRepo.delete(user);
            response = new ResponseEntity<>(HttpStatus.NO_CONTENT);

        } else {
            response = new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }

        return response;
    }

}