package de.pnreichmuth.timekeep_backend.controllers;

import de.pnreichmuth.timekeep_backend.entities.Team;
import de.pnreichmuth.timekeep_backend.exceptions.TeamExistsException;
import de.pnreichmuth.timekeep_backend.exceptions.TeamNotFoundException;
import de.pnreichmuth.timekeep_backend.services.TeamService;
import de.pnreichmuth.timekeep_backend.wsto.TeamWSTO;
import lombok.NonNull;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.http.ProblemDetail;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

@RestController
@RequestMapping("/teams")
@Slf4j
@RequiredArgsConstructor
public class TeamRestController {

    private final TeamService teamService;

    //  ///////////////////////////////////////////////BEGIN POST MAPPINGS///////////////////////////////////////////////////

    /**
     * Creates a team with the information provided via the /teams/createTeam endpoint
     * @param team
     * @return a ResponseEntity,
     * either containing a TeamWSTO if a team was successfully created or a HttpStatus.CONFLICT if the team already existed beforehand
     */
    @PostMapping("createTeam")
    public ResponseEntity<@NonNull TeamWSTO> createTeam(@RequestBody Team team){
        try {
            teamService.createTeam(team);
            return new ResponseEntity<>(TeamWSTO.of(team), HttpStatus.CREATED);
        } catch (TeamExistsException e) {
            return ResponseEntity.of(ProblemDetail.forStatusAndDetail(HttpStatus.CONFLICT,"This team already exists")).build();
        }
    }


    // ///////////////////////////////////////////////BEGIN GET MAPPINGS///////////////////////////////////////////////////
    /**
     * Gets all stored teams from the database
     * @return a HttpStatus.NOT_FOUND ResponseEntity if the database does not contain any teams,
     * else a ResponseEntity containing the list of all Teams in WSTO form
     */
    @GetMapping("")
    public ResponseEntity<@NonNull List<TeamWSTO>> getAllTeams(){
        List<Team> teams = teamService.getTeams();
        List<TeamWSTO> teamWSTOs = new ArrayList<>();
        if(teams.isEmpty()){
            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }
        for(Team team : teams){
            teamWSTOs.add(TeamWSTO.of(team));
        }
        return new ResponseEntity<>(teamWSTOs, HttpStatus.OK);
    }

    /**
     * Gets all the information pertaining to a given team via the API
     * @param reqTeam the team to query all information about with either a name or an id field set
     * @return a ResponseEntity containing the team in WSTO form, or a ResponseEntity containing either BAD_REQUEST or NOT_FOUND.
     */
    @GetMapping("single-team")
    public ResponseEntity<@NonNull TeamWSTO> getSingleTeam(@RequestBody Team reqTeam){
        UUID id = reqTeam.getId();
        String name = reqTeam.getTeamName();
        Team actualTeam;
        try{
            actualTeam = teamService.getTeam(reqTeam);
            return new ResponseEntity<>(TeamWSTO.of(actualTeam), HttpStatus.OK);
        }
        catch(TeamNotFoundException e){
            if(id != null) return ResponseEntity.of(ProblemDetail.forStatusAndDetail(HttpStatus.NOT_FOUND,"Team with id "+ id +" not found")).build();
            else return ResponseEntity.of(ProblemDetail.forStatusAndDetail(HttpStatus.NOT_FOUND,"Team with name "+ name +" not found")).build();
        }
        catch (IllegalArgumentException e){
            return ResponseEntity.of(ProblemDetail.forStatusAndDetail(HttpStatus.BAD_REQUEST,e.getMessage())).build();
        }
    }

    //  ///////////////////////////////////////////////BEGIN DELETE MAPPINGS///////////////////////////////////////////////////

    /**
     * Deletes all teams (yes, really)
     * @return a ResponseEntity with HttpStatus.OK
     */
    @DeleteMapping("all")
    public ResponseEntity< @NonNull String> deleteAllTeams(){
        teamService.deleteAllTeams();
        return ResponseEntity.of(ProblemDetail.forStatusAndDetail(HttpStatus.OK,"All teams deleted")).build();
    }

    /**
     * Deletes a team via its name or id
     * @param team the team to query all information about with either a name or an id field set
     * @return a ResponseEntity containing HttpStatus.OK if deletion was successful,
     * or a ResponseEntity containing either BAD_REQUEST or NOT_FOUND.
     */
    @DeleteMapping("single-team")
    public ResponseEntity<@NonNull String> deleteTeam(@RequestBody Team team){
        String name = team.getTeamName();
        UUID id = team.getId();
        try {
            if(id != null) teamService.deleteTeam(id); //prefer uuid over name
            else if(name != null) teamService.deleteTeam(name);
            else return ResponseEntity.of(ProblemDetail.forStatusAndDetail(HttpStatus.BAD_REQUEST, "Must provide either id or name")).build();
            return ResponseEntity.of(ProblemDetail.forStatusAndDetail(HttpStatus.OK,"Team deleted successfully")).build();
        }
        catch (TeamNotFoundException e){
            if (id != null) return ResponseEntity.of(ProblemDetail.forStatusAndDetail(HttpStatus.NOT_FOUND,"Team with id "+ id +" not found")).build();
            else if(name != null) return ResponseEntity.of(ProblemDetail.forStatusAndDetail(HttpStatus.NOT_FOUND,"Team with name "+ name +"not found")).build();
            else return ResponseEntity.of(ProblemDetail.forStatusAndDetail(HttpStatus.NOT_FOUND, "Team could not be found")).build();
        }
    }
}