using System;
using System.Diagnostics;
using UnityEngine;
using Ashwild.Audio;
using Ashwild.Harvesting;
using Ashwild.Interaction;
using Ashwild.Inventory;

namespace Ashwild.Player
{
    public static class PlayerEvents
    {
        // ============================================================
        // State (single source of truth — read by everyone)
        // ============================================================

        public static bool IsDead { get; private set; }
        public static bool IsGrounded { get; private set; } = true;
        public static bool IsCrouching { get; private set; }
        public static bool IsSprinting { get; private set; }
        public static bool IsSliding { get; private set; }
        public static bool IsOnSlope { get; private set; }
        public static bool IsInventoryOpen { get; private set; }
        public static bool IsPaused { get; private set; }

        // True when a networked session is live (host or client).
        public static bool IsOnline { get; private set; }
        // True when this instance owns the server (host = server + local client).
        public static bool IsHost { get; private set; }
        // Shareable code of the current session (host SteamID64). Empty when offline.
        public static string SessionCode { get; private set; } = string.Empty;

        // The interactable the player is currently aiming at (null when none).
        public static IInteractable HoveredInteractable { get; private set; }

        // Single source of truth for "the player must not respond to input right now".
        // Used by locomotion, camera, tools and interaction so they all agree.
        public static bool InputLocked => IsDead || IsInventoryOpen || IsPaused;

        // ============================================================
        // Input events
        // ============================================================

        public static event Action<Vector2> MoveInput;
        public static event Action<Vector2> LookInput;
        public static event Action JumpPressed;
        public static event Action<bool> SprintHeld;
        public static event Action CrouchPressed;
        public static event Action AttackPressed;
        public static event Action InteractPressed;
        public static event Action DropPressed;
        public static event Action InventoryTogglePressed;
        public static event Action<int> HotbarSlotPressed;
        public static event Action<float> HotbarScroll;
        public static event Action CancelPressed;               // UI "Cancel" (Escape) — back / pause / close

        // ============================================================
        // Locomotion events
        // ============================================================

        public static event Action<bool, float> GroundedChanged;        // isGrounded, impactSpeed
        public static event Action<bool, Vector3> SlopeChanged;
        public static event Action<PhysicsMaterial> GroundMaterialChanged;
        public static event Action<Vector3> VelocityChanged;
        public static event Action<float> YawChanged;
        public static event Action Jumped;
        public static event Action<bool> CrouchChanged;
        public static event Action<bool> SprintChanged;
        public static event Action<float, Vector3> CapsuleHeightChanged;
        public static event Action<float> CameraHeightChanged;
        public static event Action<float> LandingStunStarted;
        public static event Action LandingStunEnded;
        public static event Action SlideStarted;
        public static event Action SlideEnded;
        public static event Action<int> MultiJumpPerformed;

        // ============================================================
        // Stats events
        // ============================================================

        public static event Action<float, float> HealthChanged;
        public static event Action<float, float> HungerChanged;
        public static event Action<float, float> ThirstChanged;
        public static event Action<float, DamageType> Damaged;
        public static event Action<float> FallDamageApplied;
        public static event Action<float> StarvationTick;
        public static event Action<float> DehydrationTick;

        // ============================================================
        // Inventory events
        // ============================================================

        public static event Action<int> InventorySlotChanged;
        public static event Action<int> SelectedHotbarSlotChanged;
        public static event Action<ItemData, int> ItemAdded;
        public static event Action<ItemData, int> ItemDropped;
        public static event Action<ItemData> ItemConsumed;
        public static event Action<ItemData, int> ItemPickedUp;
        public static event Action<ItemData> HeldItemChanged;
        public static event Action<bool> InventoryOpenChanged;
        public static event Action<bool> GamePausedChanged;

        // ============================================================
        // Interaction events
        // ============================================================

        public static event Action<IInteractable> InteractableHoverChanged; // null = nothing hovered

        // ============================================================
        // Tools events
        // ============================================================

        public static event Action AttackSwung;
        public static event Action<Harvestable, float> HarvestableHit;
        public static event Action EquipAnimComplete;
        public static event Action UnequipAnimComplete;

        // ============================================================
        // Cooking events
        // ============================================================

        public static event Action<ItemData> FoodPlacedToCook;  // the raw item placed on a station
        public static event Action<ItemData> FoodCookedReady;   // the cooked result is ready to take
        public static event Action<ItemData> FuelAdded;         // the fuel item consumed to feed a station

        // ============================================================
        // Audio events
        // ============================================================

        public static event Action<SurfaceSoundProfile> SurfaceChanged;
        public static event Action<SurfaceSoundProfile, float> FootstepTriggered;

        // ============================================================
        // Lifecycle events
        // ============================================================

        public static event Action Died;
        public static event Action Respawned;
        public static event Action<bool> DeathChanged;

        // ============================================================
        // Network / session events
        // ============================================================

        public static event Action SessionStarting;             // host/join requested, before transport is up
        public static event Action<string> SessionStarted;      // host is up — payload is the shareable code
        public static event Action<string> SessionJoining;      // local client connecting to a code
        public static event Action SessionJoined;               // local client connected to a host
        public static event Action SessionStopped;              // session fully torn down (offline again)
        public static event Action<string> SessionError;        // human-readable failure reason
        public static event Action<int> RemotePlayerCountChanged; // number of *other* connected clients
        public static event Action LocalPlayerSpawned;          // the local owned player NetworkObject is ready
        public static event Action<ulong, string, string> InviteReceived; // inviter SteamID64, inviter name, connect code

        // ============================================================
        // Raisers — state is updated automatically here so consumers
        // can rely on PlayerEvents.IsX matching the latest event.
        // ============================================================

        public static void RaiseMoveInput(Vector2 v) { Log(nameof(MoveInput)); MoveInput?.Invoke(v); }
        public static void RaiseLookInput(Vector2 v) { LookInput?.Invoke(v); }
        public static void RaiseJumpPressed() { Log(nameof(JumpPressed)); JumpPressed?.Invoke(); }
        public static void RaiseSprintHeld(bool b) { Log(nameof(SprintHeld)); SprintHeld?.Invoke(b); }
        public static void RaiseCrouchPressed() { Log(nameof(CrouchPressed)); CrouchPressed?.Invoke(); }
        public static void RaiseAttackPressed() { Log(nameof(AttackPressed)); AttackPressed?.Invoke(); }
        public static void RaiseInteractPressed() { Log(nameof(InteractPressed)); InteractPressed?.Invoke(); }
        public static void RaiseDropPressed() { Log(nameof(DropPressed)); DropPressed?.Invoke(); }
        public static void RaiseInventoryTogglePressed() { Log(nameof(InventoryTogglePressed)); InventoryTogglePressed?.Invoke(); }
        public static void RaiseHotbarSlotPressed(int i) { Log(nameof(HotbarSlotPressed)); HotbarSlotPressed?.Invoke(i); }
        public static void RaiseHotbarScroll(float f) { HotbarScroll?.Invoke(f); }
        public static void RaiseCancelPressed() { Log(nameof(CancelPressed)); CancelPressed?.Invoke(); }

        public static void RaiseGroundedChanged(bool grounded, float impactSpeed)
        {
            IsGrounded = grounded;
            Log(nameof(GroundedChanged));
            GroundedChanged?.Invoke(grounded, impactSpeed);
        }
        public static void RaiseSlopeChanged(bool onSlope, Vector3 normal)
        {
            IsOnSlope = onSlope;
            SlopeChanged?.Invoke(onSlope, normal);
        }
        public static void RaiseGroundMaterialChanged(PhysicsMaterial m) { GroundMaterialChanged?.Invoke(m); }
        public static void RaiseVelocityChanged(Vector3 v) { VelocityChanged?.Invoke(v); }
        public static void RaiseYawChanged(float y) { YawChanged?.Invoke(y); }
        public static void RaiseJumped() { Log(nameof(Jumped)); Jumped?.Invoke(); }
        public static void RaiseCrouchChanged(bool b)
        {
            IsCrouching = b;
            Log(nameof(CrouchChanged));
            CrouchChanged?.Invoke(b);
        }
        public static void RaiseSprintChanged(bool b)
        {
            IsSprinting = b;
            Log(nameof(SprintChanged));
            SprintChanged?.Invoke(b);
        }
        public static void RaiseCapsuleHeightChanged(float h, Vector3 c) { CapsuleHeightChanged?.Invoke(h, c); }
        public static void RaiseCameraHeightChanged(float h) { CameraHeightChanged?.Invoke(h); }
        public static void RaiseLandingStunStarted(float d) { Log(nameof(LandingStunStarted)); LandingStunStarted?.Invoke(d); }
        public static void RaiseLandingStunEnded() { Log(nameof(LandingStunEnded)); LandingStunEnded?.Invoke(); }
        public static void RaiseSlideStarted()
        {
            IsSliding = true;
            Log(nameof(SlideStarted));
            SlideStarted?.Invoke();
        }
        public static void RaiseSlideEnded()
        {
            IsSliding = false;
            Log(nameof(SlideEnded));
            SlideEnded?.Invoke();
        }
        public static void RaiseMultiJumpPerformed(int i) { Log(nameof(MultiJumpPerformed)); MultiJumpPerformed?.Invoke(i); }

        public static void RaiseHealthChanged(float c, float m) { HealthChanged?.Invoke(c, m); }
        public static void RaiseHungerChanged(float c, float m) { HungerChanged?.Invoke(c, m); }
        public static void RaiseThirstChanged(float c, float m) { ThirstChanged?.Invoke(c, m); }
        public static void RaiseDamaged(float a, DamageType t) { Log(nameof(Damaged)); Damaged?.Invoke(a, t); }
        public static void RaiseFallDamageApplied(float a) { Log(nameof(FallDamageApplied)); FallDamageApplied?.Invoke(a); }
        public static void RaiseStarvationTick(float a) { StarvationTick?.Invoke(a); }
        public static void RaiseDehydrationTick(float a) { DehydrationTick?.Invoke(a); }

        public static void RaiseInventorySlotChanged(int i) { InventorySlotChanged?.Invoke(i); }
        public static void RaiseSelectedHotbarSlotChanged(int i) { Log(nameof(SelectedHotbarSlotChanged)); SelectedHotbarSlotChanged?.Invoke(i); }
        public static void RaiseItemAdded(ItemData d, int q) { Log(nameof(ItemAdded)); ItemAdded?.Invoke(d, q); }
        public static void RaiseItemDropped(ItemData d, int q) { Log(nameof(ItemDropped)); ItemDropped?.Invoke(d, q); }
        public static void RaiseItemConsumed(ItemData d) { Log(nameof(ItemConsumed)); ItemConsumed?.Invoke(d); }
        public static void RaiseItemPickedUp(ItemData d, int q) { Log(nameof(ItemPickedUp)); ItemPickedUp?.Invoke(d, q); }
        public static void RaiseHeldItemChanged(ItemData d) { Log(nameof(HeldItemChanged)); HeldItemChanged?.Invoke(d); }
        public static void RaiseInventoryOpenChanged(bool b)
        {
            IsInventoryOpen = b;
            Log(nameof(InventoryOpenChanged));
            InventoryOpenChanged?.Invoke(b);
        }
        public static void RaiseGamePaused(bool b)
        {
            IsPaused = b;
            Log(nameof(GamePausedChanged));
            GamePausedChanged?.Invoke(b);
        }

        public static void RaiseInteractableHoverChanged(IInteractable target)
        {
            HoveredInteractable = target;
            Log(nameof(InteractableHoverChanged));
            InteractableHoverChanged?.Invoke(target);
        }

        public static void RaiseAttackSwung() { Log(nameof(AttackSwung)); AttackSwung?.Invoke(); }
        public static void RaiseHarvestableHit(Harvestable h, float d) { Log(nameof(HarvestableHit)); HarvestableHit?.Invoke(h, d); }
        public static void RaiseEquipAnimComplete() { EquipAnimComplete?.Invoke(); }
        public static void RaiseUnequipAnimComplete() { UnequipAnimComplete?.Invoke(); }

        public static void RaiseFoodPlacedToCook(ItemData raw) { Log(nameof(FoodPlacedToCook)); FoodPlacedToCook?.Invoke(raw); }
        public static void RaiseFoodCookedReady(ItemData cooked) { Log(nameof(FoodCookedReady)); FoodCookedReady?.Invoke(cooked); }
        public static void RaiseFuelAdded(ItemData fuel) { Log(nameof(FuelAdded)); FuelAdded?.Invoke(fuel); }

        public static void RaiseSurfaceChanged(SurfaceSoundProfile p) { SurfaceChanged?.Invoke(p); }
        public static void RaiseFootstepTriggered(SurfaceSoundProfile p, float v) { FootstepTriggered?.Invoke(p, v); }

        public static void RaiseDied()
        {
            IsDead = true;
            Log(nameof(Died));
            Died?.Invoke();
            DeathChanged?.Invoke(true);
        }
        public static void RaiseRespawned()
        {
            IsDead = false;
            IsCrouching = false;
            IsSliding = false;
            IsSprinting = false;
            Log(nameof(Respawned));
            Respawned?.Invoke();
            DeathChanged?.Invoke(false);
        }

        public static void RaiseSessionStarting() { Log(nameof(SessionStarting)); SessionStarting?.Invoke(); }
        public static void RaiseSessionStarted(string code)
        {
            IsOnline = true;
            IsHost = true;
            SessionCode = code ?? string.Empty;
            Log(nameof(SessionStarted));
            SessionStarted?.Invoke(SessionCode);
        }
        public static void RaiseSessionJoining(string code)
        {
            SessionCode = code ?? string.Empty;
            Log(nameof(SessionJoining));
            SessionJoining?.Invoke(SessionCode);
        }
        public static void RaiseSessionJoined()
        {
            IsOnline = true;
            IsHost = false;
            Log(nameof(SessionJoined));
            SessionJoined?.Invoke();
        }
        public static void RaiseSessionStopped()
        {
            IsOnline = false;
            IsHost = false;
            SessionCode = string.Empty;
            ResetPlayerState();
            Log(nameof(SessionStopped));
            SessionStopped?.Invoke();
        }

        // Clears the transient, player-local state so a brand-new session/player starts clean.
        // The static bus tracks the LOCAL player only; without this, dying or opening the
        // inventory and then leaving a session would leave stale flags set for the next one.
        private static void ResetPlayerState()
        {
            IsDead = false;
            IsGrounded = true;
            IsCrouching = false;
            IsSprinting = false;
            IsSliding = false;
            IsOnSlope = false;
            IsInventoryOpen = false;
            IsPaused = false;
            HoveredInteractable = null;
        }
        public static void RaiseSessionError(string reason) { Log(nameof(SessionError)); SessionError?.Invoke(reason); }
        public static void RaiseRemotePlayerCountChanged(int count) { Log(nameof(RemotePlayerCountChanged)); RemotePlayerCountChanged?.Invoke(count); }
        public static void RaiseLocalPlayerSpawned() { Log(nameof(LocalPlayerSpawned)); LocalPlayerSpawned?.Invoke(); }

        /// <summary>
        /// A friend invited the local player to their session (delivered by Steam). Carries the
        /// inviter's SteamID64, display name, and the connect code used to join their room.
        /// </summary>
        public static void RaiseInviteReceived(ulong inviterSteamId, string inviterName, string connectCode)
        {
            Log(nameof(InviteReceived));
            InviteReceived?.Invoke(inviterSteamId, inviterName, connectCode);
        }

        [Conditional("PLAYER_EVENT_LOG")]
        private static void Log(string evtName)
        {
            UnityEngine.Debug.Log($"[PlayerEvents] {evtName}");
        }
    }

    public enum DamageType { Generic, Fall, Starvation, Dehydration, Combat }
}