using LocationsApi.Models;
using LocationsApi.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using System.Security.Claims;

namespace LocationsApi.Controllers;

[ApiController]
[Route("api/[controller]")]
public class UnitsController : ControllerBase
{
    private readonly UnitTrainingService _units;

    public UnitsController(UnitTrainingService units)
    {
        _units = units;
    }

    [Authorize(Roles = "USER,SUPER")]
    [HttpGet("me")]
    public async Task<ActionResult<PlayerUnitsResponse>> GetMine()
    {
        var username = User.FindFirstValue(ClaimTypes.Name);
        if (string.IsNullOrWhiteSpace(username))
        {
            return Unauthorized();
        }

        return Ok(await _units.GetMineAsync(username));
    }

    [Authorize(Roles = "USER,SUPER")]
    [HttpPost("train")]
    public async Task<ActionResult<UnitTrainingResponse>> Train([FromBody] TrainUnitRequest request)
    {
        var username = User.FindFirstValue(ClaimTypes.Name);
        if (string.IsNullOrWhiteSpace(username))
        {
            return Unauthorized();
        }

        try
        {
            var training = await _units.TrainAsync(username, request);
            if (training is null)
            {
                return BadRequest(new { error = "Not enough resources." });
            }

            return Ok(UnitTrainingResponse.FromTraining(training));
        }
        catch (ArgumentException ex)
        {
            return BadRequest(new { error = ex.Message });
        }
        catch (InvalidOperationException ex)
        {
            return BadRequest(new { error = ex.Message });
        }
    }

    [Authorize(Roles = "USER,SUPER")]
    [HttpPost("move")]
    public async Task<ActionResult<List<UnitInstanceResponse>>> Move([FromBody] MoveUnitSquadRequest request)
    {
        var username = User.FindFirstValue(ClaimTypes.Name);
        if (string.IsNullOrWhiteSpace(username))
        {
            return Unauthorized();
        }

        try
        {
            var units = await _units.MoveSquadAsync(username, request);
            if (units.Count == 0)
            {
                return BadRequest(new { error = "No matching units are available to move." });
            }

            return Ok(units.Select(UnitInstanceResponse.FromUnit).ToList());
        }
        catch (ArgumentException ex)
        {
            return BadRequest(new { error = ex.Message });
        }
        catch (InvalidOperationException ex)
        {
            return BadRequest(new { error = ex.Message });
        }
    }
}