using BepInEx;
using BepInEx.Configuration;
using UnityEngine;

namespace AutoRefillFires
{

    [BepInPlugin(
        Plugin.PluginGuid,
        Plugin.PluginName,
        Plugin.PluginVersion
    )]
    public class Plugin : BaseUnityPlugin
    {
        public const string PluginGuid = "simplifydave.autorefillfires";
        public const string PluginName = "Auto Refill Fires";
        public const string PluginVersion = VersionInfo.Version;

        private ConfigEntry<float> _radius;
        private ConfigEntry<float> _checkInterval;
        private ConfigEntry<float> _refillBelowPercent;

        private ConfigEntry<bool> _useNearbyContainers;
        private ConfigEntry<float> _containerRadius;

        private ConfigEntry<bool> _refillToMax;
        private ConfigEntry<int> _refillAmount;
        private ConfigEntry<bool> _fillCampfires;
        private ConfigEntry<bool> _fillHearths;
        private ConfigEntry<bool> _fillStandingTorches;
        private ConfigEntry<bool> _fillWallTorches;
        private ConfigEntry<bool> _fillBraziers;
        private ConfigEntry<bool> _fillOtherFireplaces;

        private float _nextCheckTime;

        private void Awake()
        {
            _radius = Config.Bind(
                "General",
                "Radius",
                20f,
                "Refill fireplaces within this radius around the player."
            );

            _checkInterval = Config.Bind(
                "General",
                "CheckInterval",
                3f,
                "How often fireplaces are checked, in seconds."
            );

            _refillBelowPercent = Config.Bind(
                "General",
                "RefillBelowPercent",
                0.75f,
                "Refill when fuel drops below this percentage."
            );

            _refillToMax = Config.Bind(
                "General",
                "RefillToMax",
                true,
                "If true, refill fireplaces to maximum fuel. If false, add only RefillAmount fuel."
            );

            _refillAmount = Config.Bind(
                "General",
                "RefillAmount",
                5,
                "Amount of fuel to add when RefillToMax is false."
            );

            _useNearbyContainers = Config.Bind(
                "Containers",
                "UseNearbyContainers",
                false,
                "Allow plugin to take fuel from nearby containers."
            );

            _containerRadius = Config.Bind(
                "Containers",
                "ContainerRadius",
                10f,
                "Maximum distance from the fireplace to search for containers."
            );

            _fillCampfires = Config.Bind(
                "Fireplace Types",
                "FillCampfires",
                true,
                "Automatically refill campfires."
            );

            _fillHearths = Config.Bind(
                "Fireplace Types",
                "FillHearths",
                true,
                "Automatically refill hearths."
            );

            _fillStandingTorches = Config.Bind(
                "Fireplace Types",
                "FillStandingTorches",
                true,
                "Automatically refill all standing torches, including colored variants."
            );

            _fillWallTorches = Config.Bind(
                "Fireplace Types",
                "FillWallTorches",
                true,
                "Automatically refill all wall torches, including colored variants."
            );

            _fillBraziers = Config.Bind(
                "Fireplace Types",
                "FillBraziers",
                true,
                "Automatically refill braziers."
            );

            _fillOtherFireplaces = Config.Bind(
                "Fireplace Types",
                "FillOtherFireplaces",
                true,
                "Automatically refill unknown or modded Fireplace-based objects."
            );

            Logger.LogInfo("Auto Refill Fires loaded!");
        }

        private void Update()
        {
            if (Time.time < _nextCheckTime)
                return;

            _nextCheckTime = Time.time + _checkInterval.Value;

            Player player = Player.m_localPlayer;

            if (player == null)
                return;

            RefillNearbyFireplaces(player);
        }

        private bool ShouldRefillFireplace(Fireplace fireplace)
        {
            string objectName = fireplace.gameObject.name
                .Replace("(Clone)", "")
                .ToLowerInvariant();

            // Campfire
            if (objectName.Contains("firepit"))
                return _fillCampfires.Value;

            // Hearth
            if (objectName.Contains("hearth"))
                return _fillHearths.Value;

            // All standing / ground torches, including colored variants
            if (objectName.Contains("groundtorch"))
                return _fillStandingTorches.Value;

            // All wall torches, including colored variants
            if (objectName.Contains("walltorch"))
                return _fillWallTorches.Value;

            // Braziers
            if (objectName.Contains("brazier"))
                return _fillBraziers.Value;

            // Unknown / modded Fireplace-based objects
            return _fillOtherFireplaces.Value;
        }

        private void RefillNearbyFireplaces(Player player)
        {
            Fireplace[] fireplaces =
                Object.FindObjectsByType<Fireplace>(
                    FindObjectsInactive.Exclude,
                    FindObjectsSortMode.None
                );

            foreach (Fireplace fireplace in fireplaces)
            {
                if (fireplace == null)
                    continue;

                float distance = Vector3.Distance(
                    player.transform.position,
                    fireplace.transform.position
                );

                if (distance > _radius.Value)
                    continue;

                TryRefillFireplace(player, fireplace);
            }
        }

        private void TryRefillFireplace(Player player, Fireplace fireplace)
        {
            if (!ShouldRefillFireplace(fireplace))
                return;
            ZNetView nview = fireplace.GetComponent<ZNetView>();

            if (nview == null)
                nview = fireplace.GetComponentInParent<ZNetView>();

            if (nview == null)
                return;

            if (!nview.IsValid())
                return;

            ZDO zdo = nview.GetZDO();

            if (zdo == null)
                return;

            if (fireplace.m_fuelItem == null)
                return;

            float currentFuel = zdo.GetFloat(ZDOVars.s_fuel, 0f);
            float maxFuel = fireplace.m_maxFuel;

            if (maxFuel <= 0f)
                return;

            float fuelPercent = currentFuel / maxFuel;

            if (fuelPercent >= _refillBelowPercent.Value)
                return;

            string fuelName =
                fireplace.m_fuelItem.m_itemData.m_shared.m_name;

            int missingFuel =
                Mathf.CeilToInt(maxFuel - currentFuel);

            if (missingFuel <= 0)
                return;

            int requestedFuel;

            if (_refillToMax.Value)
            {
                requestedFuel = missingFuel;
            }
            else
            {
                requestedFuel = Mathf.Min(
                    Mathf.Max(_refillAmount.Value, 0),
                    missingFuel
                );
            }

            if (requestedFuel <= 0)
                return;

            int fuelAdded = 0;

            for (int i = 0; i < requestedFuel; i++)
            {
                if (!TryConsumeFuel(
                    player,
                    fireplace,
                    fuelName
                ))
                {
                    break;
                }

                nview.InvokeRPC(
                    "RPC_AddFuel",
                    new object[0]
                );

                fuelAdded++;
            }

            if (fuelAdded > 0)
            {
                Logger.LogInfo(
                    $"Refilled {fireplace.name}: " +
                    $"{currentFuel:0.0}/{maxFuel:0.0}, " +
                    $"fuel={fuelName}, " +
                    $"added={fuelAdded}, " +
                    $"mode={(_refillToMax.Value ? "max" : "fixed")}"
                );
            }
        }

        private bool TryConsumeFuel(Player player, Fireplace fireplace, string fuelName)
        {
            Inventory playerInventory = player.GetInventory();

            if (playerInventory.CountItems(fuelName) > 0)
            {
                playerInventory.RemoveItem(fuelName, 1);

                Logger.LogDebug(
                    $"Fuel {fuelName} taken from player inventory."
                );

                return true;
            }

            if (!_useNearbyContainers.Value)
                return false;

            return TryConsumeFuelFromNearbyContainer(
                fireplace,
                fuelName
            );
        }

        private bool TryConsumeFuelFromNearbyContainer(
            Fireplace fireplace,
            string fuelName)
        {
            Container[] containers =
                Object.FindObjectsByType<Container>(
                    FindObjectsInactive.Exclude,
                    FindObjectsSortMode.None
                );

            Container closestContainer = null;
            float closestDistance = float.MaxValue;

            foreach (Container container in containers)
            {
                if (container == null)
                    continue;

                float distance = Vector3.Distance(
                    fireplace.transform.position,
                    container.transform.position
                );

                if (distance > _containerRadius.Value)
                    continue;

                Inventory inventory = container.GetInventory();

                if (inventory == null)
                    continue;

                if (inventory.CountItems(fuelName) <= 0)
                    continue;

                if (distance < closestDistance)
                {
                    closestDistance = distance;
                    closestContainer = container;
                }
            }

            if (closestContainer == null)
                return false;

            Inventory chestInventory =
                closestContainer.GetInventory();

            if (chestInventory == null)
                return false;

            if (chestInventory.CountItems(fuelName) <= 0)
                return false;

            chestInventory.RemoveItem(fuelName, 1);

            Logger.LogInfo(
                $"Fuel {fuelName} taken from container " +
                $"{closestContainer.name} " +
                $"({closestDistance:0.0}m)"
            );

            return true;
        }
    }
}