// Controllers/PlayerController.cs
using GameAuthApi.Models;
using GameAuthApi.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Threading.Tasks;

namespace GameAuthApi.Controllers;

[ApiController]
[Route("api/[controller]")]
public class PlayerController : ControllerBase
{
    private readonly PlayerService _playerService;
    private readonly LocationService _locationService;
    private readonly SpawnableService _spawnableService;
    private readonly ItemService _itemService;

    public PlayerController(PlayerService playerService, LocationService locationService, SpawnableService spawnableService, ItemService itemService)
    {
        _playerService = playerService;
        _locationService = locationService;
        _spawnableService = spawnableService;
        _itemService = itemService;
    }

    [HttpPost]
    [Authorize(Roles = "USER,SUPER")]
    public async Task<IActionResult> Create([FromBody] CreatePlayerRequest req)
    {
        var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
        if (string.IsNullOrEmpty(userId))
            return Unauthorized("User ID not found in token.");

        var existing = await _playerService.GetByUserIdAsync(userId);
        if (existing != null)
            return BadRequest("Player already exists for this user.");

        Location spawnLocation = null;

        if (!string.IsNullOrWhiteSpace(req.LocationId))
        {
            spawnLocation = await _locationService.GetByIdAsync(req.LocationId);
            if (spawnLocation == null)
                return BadRequest("Specified location does not exist.");
        }
        else
        {
            spawnLocation = await _locationService.GetSpawnLocationAsync();
            // If not found, spawnLocation remains null
        }

        // create the inventory location
        var inventoryLocation = new Location
        {
            LocationType = "Inventory",
            X = null,
            Y = null,
            Z = null,
            N = null,
            NE = null,
            E = null,
            SE = null,
            S = null,
            SW = null,
            W = null,
            NW = null,
            Players = new List<string>() // optional
        };

        await _locationService.CreateAsync(inventoryLocation);

        var player = new Player
        {
            UserId = userId,
            Name = req.Name,
            LocationId = spawnLocation?.Id,
            InventoryLocationId = inventoryLocation.Id,
            Climbing = 3
        };

        await _playerService.CreateAsync(player);

        if (spawnLocation != null)
        {
            await _locationService.AddPlayerToLocationAsync(spawnLocation.Id, player.Id);
        }

        return Ok(player);
    }

    [HttpPut]
    [Authorize(Roles = "USER,SUPER")]
    public async Task<IActionResult> Update([FromBody] UpdatePlayerRequest req)
    {
        var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
        var player = await _playerService.GetByUserIdAsync(userId);
        if (player == null)
            return NotFound("Player not found.");

        player.Name = req.Name;
        player.Climbing = req.Climbing;
        await _playerService.UpdateAsync(player);
        return Ok(player);
    }

    [HttpDelete]
    [Authorize(Roles = "USER,SUPER")]
    public async Task<IActionResult> Delete()
    {
        var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
        var role = User.FindFirstValue(ClaimTypes.Role);

        var player = await _playerService.GetByUserIdAsync(userId);
        if (player == null)
            return NotFound("No player found for this user.");

        // Remove from current location if set
        if (!string.IsNullOrEmpty(player.LocationId))
        {
            await _locationService.RemovePlayerFromLocationAsync(player.LocationId, player.Id);
        }

        await _playerService.DeleteAsync(player.Id);
        return Ok($"Player '{player.Name}' deleted.");
    }

    [HttpPost("teleport")]
    [Authorize(Roles = "SUPER")]
    public async Task<IActionResult> AdminTeleport([FromBody] TeleportRequest req)
    {
        var player = await _playerService.GetByIdAsync(req.PlayerId);
        if (player == null)
            return NotFound("Player not found.");

        var newLocation = await _locationService.GetByIdAsync(req.LocationId);
        if (newLocation == null)
            return BadRequest("Target location does not exist.");

        if (!string.IsNullOrEmpty(player.LocationId))
        {
            await _locationService.RemovePlayerFromLocationAsync(player.LocationId, player.Id);
        }

        player.LocationId = newLocation.Id;
        await _playerService.UpdateAsync(player);
        await _locationService.AddPlayerToLocationAsync(newLocation.Id, player.Id);

        return Ok($"Player '{player.Name}' teleported to '{newLocation.X}, {newLocation.Y}'.");
    }

    [HttpPost("move")]
    [Authorize(Roles = "USER,SUPER")]
    public async Task<IActionResult> Move([FromBody] MoveRequest req)
    {
        var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
        var player = await _playerService.GetByUserIdAsync(userId);
        if (player == null)
            return NotFound("Player not found.");

        if (string.IsNullOrWhiteSpace(player.LocationId))
            return BadRequest("Player is not currently in a location.");

        var currentLocation = await _locationService.GetByIdAsync(player.LocationId);
        if (currentLocation == null)
            return BadRequest("Current location not found.");

        if (string.IsNullOrWhiteSpace(req.Direction))
            return BadRequest("Direction is required.");

        var direction = req.Direction.ToUpper();
        var directionMap = new Dictionary<string, (int dx, int dy, string reverse)>
        {
            { "N",  (0, 1, "S") }, { "NE", (1, 1, "SW") }, { "E",  (1, 0, "W") }, { "SE", (1, -1, "NW") },
            { "S",  (0, -1, "N") }, { "SW", (-1, -1, "NE") }, { "W",  (-1, 0, "E") }, { "NW", (-1, 1, "SE") }
        };

        if (!directionMap.ContainsKey(direction))
            return BadRequest("Invalid direction. Use N, NE, E, SE, S, SW, W, or NW.");

        var (dx, dy, reverseDir) = directionMap[direction];

        var targetId = typeof(Location).GetProperty(direction)?.GetValue(currentLocation)?.ToString();
        Location targetLocation;

        if (!string.IsNullOrWhiteSpace(targetId))
        {
            targetLocation = await _locationService.GetByIdAsync(targetId);
            if (targetLocation == null)
                return BadRequest("Linked location ID is invalid.");

            var z1 = currentLocation.Z ?? 0;
            var z2 = targetLocation.Z ?? 0;
            var zDiff = Math.Abs(z1 - z2);

            if (zDiff > player.Climbing)
            {
                return BadRequest($"Cannot move {req.Direction.ToUpper()}: elevation difference ({zDiff}) exceeds your climbing ability ({player.Climbing}).");
            }
        }
        else
        {
            // Generate new location
            var newX = currentLocation.X + dx;
            var newY = currentLocation.Y + dy;
            var newZ = currentLocation.Z + Random.Shared.Next(-1, 2); // -1, 0, or +1

            string itemId = null;
            var spawnables = await _spawnableService.GetAllAsync();

            if (spawnables.Any())
            {
                var roll = Random.Shared.Next(0, 100); // 0–99

                foreach (var s in spawnables.OrderBy(s => s.SpawnRate))
                {
                    if (roll < s.SpawnRate)
                    {
                        var tempItem = new Item
                        {
                            Name = s.Name,
                            LocationId = null,
                            UsesRemaining = s.Uses
                        };

                        await _itemService.CreateAsync(tempItem);
                        itemId = tempItem.Id;
                        break;
                    }
                }
            }

            targetLocation = new Location
            {
                LocationType = "World",
                X = newX,
                Y = newY,
                Z = newZ,
                Content = itemId != null ? [itemId] : []
            };

            await _locationService.CreateAsync(targetLocation);

            if (itemId != null)
            {
                var createdItem = await _itemService.GetByIdAsync(itemId);
                createdItem.LocationId = targetLocation.Id;
                await _itemService.UpdateAsync(createdItem);
            }

            // Link current → new
            typeof(Location).GetProperty(direction)?.SetValue(currentLocation, targetLocation.Id);
            // Link new → current
            typeof(Location).GetProperty(reverseDir)?.SetValue(targetLocation, currentLocation.Id);

            await _locationService.UpdateAsync(currentLocation);
            await _locationService.UpdateAsync(targetLocation);

            // Link additional neighbors
            foreach (var entry in directionMap)
            {
                var dir = entry.Key;
                var (nx, ny, rev) = entry.Value;

                var neighbor = await _locationService.GetByCoordinatesAsync(
                    (targetLocation.X ?? 0) + nx,
                    (targetLocation.Y ?? 0) + ny,
                    targetLocation.Z ?? 0);
                if (neighbor != null)
                {
                    typeof(Location).GetProperty(dir)?.SetValue(targetLocation, neighbor.Id);
                    typeof(Location).GetProperty(rev)?.SetValue(neighbor, targetLocation.Id);
                    await _locationService.UpdateAsync(neighbor);
                }
            }

            await _locationService.UpdateAsync(targetLocation);
        }

        // Move the player
        await _locationService.RemovePlayerFromLocationAsync(currentLocation.Id, player.Id);
        await _locationService.AddPlayerToLocationAsync(targetLocation.Id, player.Id);

        player.LocationId = targetLocation.Id;
        await _playerService.UpdateAsync(player);

        return Ok($"Player '{player.Name}' moved {direction} to '{targetLocation.X}, {targetLocation.Y}'.");
    }

    [HttpPost("action")]
    [Authorize(Roles = "USER,SUPER")]
    public async Task<IActionResult> PerformAction([FromBody] PerformActionRequest req)
    {
        var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
        var player = await _playerService.GetByUserIdAsync(userId);
        if (player == null)
            return NotFound("Player not found.");

        if (string.IsNullOrWhiteSpace(player.LocationId))
            return BadRequest("Player is not currently in a location.");

        if (string.IsNullOrWhiteSpace(req.Action))
            return BadRequest("Action is required.");

        var location = await _locationService.GetByIdAsync(player.LocationId);
        if (location == null)
            return BadRequest("Current location not found.");

        foreach (var itemId in location.Content)
        {
            var item = await _itemService.GetByIdAsync(itemId);
            if (item == null)
                continue;

            var spawnable = await _spawnableService.GetByNameAsync(item.Name.ToLower());
            if (spawnable == null)
                continue;

            if (!string.Equals(spawnable.CollectAction, req.Action, StringComparison.OrdinalIgnoreCase))
                continue;

            var roll = Random.Shared.Next(0, 100);
            var cumulative = 0;
            foreach (var outcome in spawnable.CollectResults)
            {
                cumulative += outcome.SuccessRate;
                if (roll < cumulative)
                {
                    if (!string.IsNullOrEmpty(player.InventoryLocationId))
                    {
                        var newItem = new Item
                        {
                            Name = outcome.Result,
                            LocationId = player.InventoryLocationId
                        };

                        await _itemService.CreateAsync(newItem);
                        await _locationService.AddItemToLocationAsync(player.InventoryLocationId, newItem.Id);
                    }

                    if (spawnable.ConsumeOnSuccess)
                    {
                        await _locationService.RemoveItemFromLocationAsync(location.Id, itemId);
                        await _itemService.DeleteAsync(itemId);
                    }
                    else if (item.UsesRemaining > 0)
                    {
                        item.UsesRemaining--;
                        if (item.UsesRemaining <= 0)
                        {
                            await _locationService.RemoveItemFromLocationAsync(location.Id, itemId);
                            await _itemService.DeleteAsync(itemId);
                        }
                        else
                        {
                            await _itemService.UpdateAsync(item);
                        }
                    }

                    return Ok(outcome.Result);
                }
            }

            return Ok("Nothing happens.");
        }

        return Ok("Nothing happens.");
    }

    private static readonly Dictionary<string, (int dx, int dy, string reverse)> DirectionData = new()
    {
        { "N",  (0, 1, "S") }, { "NE", (1, 1, "SW") }, { "E",  (1, 0, "W") }, { "SE", (1, -1, "NW") },
        { "S",  (0, -1, "N") }, { "SW", (-1, -1, "NE") }, { "W",  (-1, 0, "E") }, { "NW", (-1, 1, "SE") }
    };
}