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 LocationsController : ControllerBase
{
    private readonly LocationService _locations;
    private readonly UnitTrainingService _units;

    public LocationsController(LocationService locations, UnitTrainingService units)
    {
        _locations = locations;
        _units = units;
    }

    [Authorize(Roles = "USER,SUPER")]
    [HttpGet]
    public async Task<ActionResult<List<LocationResponse>>> GetAll(
        [FromQuery] int? minQ,
        [FromQuery] int? maxQ,
        [FromQuery] int? minR,
        [FromQuery] int? maxR)
    {
        if (!User.IsInRole("SUPER"))
        {
            var username = User.FindFirstValue(ClaimTypes.Name);
            if (string.IsNullOrWhiteSpace(username))
            {
                return Unauthorized();
            }

            var visible = await _locations.GetVisibleAsync(username);
            if (minQ.HasValue && maxQ.HasValue && minR.HasValue && maxR.HasValue)
            {
                visible = visible
                    .Where(x => x.Q >= minQ.Value && x.Q <= maxQ.Value && x.R >= minR.Value && x.R <= maxR.Value)
                    .ToList();
            }

            return Ok(visible);
        }

        var locations = minQ.HasValue && maxQ.HasValue && minR.HasValue && maxR.HasValue
            ? await _locations.GetRangeAsync(minQ.Value, maxQ.Value, minR.Value, maxR.Value)
            : await _locations.GetAllAsync();

        return Ok(locations.Select(location => LocationResponse.FromLocation(location)).ToList());
    }

    [Authorize(Roles = "USER,SUPER")]
    [HttpGet("{q:int}/{r:int}")]
    public async Task<ActionResult<LocationResponse>> Get(int q, int r)
    {
        if (!User.IsInRole("SUPER"))
        {
            var username = User.FindFirstValue(ClaimTypes.Name);
            if (string.IsNullOrWhiteSpace(username))
            {
                return Unauthorized();
            }

            var visibleLocation = await _locations.GetVisibleLocationAsync(username, q, r);
            return visibleLocation is null ? NotFound() : Ok(visibleLocation);
        }

        var location = await _locations.GetAsync(q, r);
        return location is null ? NotFound() : Ok(LocationResponse.FromLocation(location));
    }

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

        if (!User.IsInRole("SUPER") && !await _locations.CanSeeAsync(username, request.Q, request.R))
        {
            return NotFound();
        }

        if (!User.IsInRole("SUPER") && !await _locations.IsAdjacentToOwnedAsync(username, request.Q, request.R))
        {
            return BadRequest("Territory claims must be adjacent to controlled territory.");
        }

        var existingLocation = await _locations.GetAsync(request.Q, request.R);
        if (existingLocation is not null && !string.IsNullOrWhiteSpace(existingLocation.OwnerUsername))
        {
            if (string.Equals(existingLocation.OwnerUsername, username, StringComparison.OrdinalIgnoreCase))
            {
                return Ok(LocationResponse.FromLocation(existingLocation));
            }

            return Conflict("Location is already controlled by another player.");
        }

        if (!User.IsInRole("SUPER") && !await _units.TryConsumeCompletedScoutAsync(username))
        {
            return BadRequest("A completed scout is required to claim unclaimed territory.");
        }

        var location = await _locations.ClaimAsync(request.Q, request.R, username);
        if (location is null)
        {
            return Conflict("Location is already controlled by another player.");
        }

        return Ok(LocationResponse.FromLocation(location));
    }

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

        try
        {
            var location = await _locations.BuildAsync(request, username);
            if (location is null)
            {
                return NotFound("Build target must be controlled by the player.");
            }

            return Ok(LocationResponse.FromLocation(location));
        }
        catch (InvalidOperationException ex)
        {
            return BadRequest(ex.Message);
        }
        catch (ArgumentException ex)
        {
            return BadRequest(ex.Message);
        }
    }

    [Authorize(Roles = "USER,SUPER")]
    [HttpPost("assign-worker")]
    public async Task<ActionResult<LocationResponse>> AssignWorker([FromBody] AssignWorkerRequest request)
    {
        var username = User.FindFirstValue(ClaimTypes.Name);
        if (string.IsNullOrWhiteSpace(username))
        {
            return Unauthorized();
        }

        var location = await _locations.AssignWorkerAsync(username, request);
        return location is null
            ? BadRequest("Select an idle Peasant and a controlled completed building without a worker.")
            : Ok(LocationResponse.FromLocation(location));
    }

    [Authorize(Roles = "USER,SUPER")]
    [HttpPost("deassign-worker")]
    public async Task<ActionResult<LocationResponse>> DeassignWorker([FromBody] DeassignWorkerRequest request)
    {
        var username = User.FindFirstValue(ClaimTypes.Name);
        if (string.IsNullOrWhiteSpace(username))
        {
            return Unauthorized();
        }

        var location = await _locations.DeassignWorkerAsync(username, request);
        return location is null
            ? BadRequest("Select a controlled building with an assigned worker.")
            : Ok(LocationResponse.FromLocation(location));
    }

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

        var home = await _locations.GetHomeAsync(username);
        return home is null ? NotFound() : Ok(LocationResponse.FromLocation(home));
    }

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

        var home = await _locations.AssignHomeAsync(username);
        return Ok(LocationResponse.FromLocation(home));
    }

    [Authorize(Roles = "USER,SUPER")]
    [HttpGet("visible")]
    public async Task<ActionResult<List<LocationResponse>>> GetVisible([FromQuery] int? depth)
    {
        var username = User.FindFirstValue(ClaimTypes.Name);
        if (string.IsNullOrWhiteSpace(username))
        {
            return Unauthorized();
        }

        return Ok(await _locations.GetVisibleAsync(username, depth));
    }

    [Authorize(Roles = "SUPER")]
    [HttpPut]
    public async Task<ActionResult<LocationResponse>> Upsert([FromBody] UpsertLocationRequest request)
    {
        var location = await _locations.UpsertAsync(request);
        return Ok(LocationResponse.FromLocation(location));
    }
}