using System.Collections;
using System.Collections.Generic;
using Fusion;
using UnityEngine;
using Opsive.UltimateCharacterController.Traits;

public class PoisonGasTrap : TrapBase
{
    private List<GameObject> affectedPlayers = new List<GameObject>();

    protected override void OnTriggered(GameObject victim)
    {
        // Start the server-side poison gas zone routine
        StartCoroutine(GasZoneRoutine());
    }

    private IEnumerator GasZoneRoutine()
    {
        float elapsed = 0f;
        float tickInterval = 1.0f; // Deal damage every 1 second
        float duration = trapData.EffectDuration;
        float radius = trapData.EffectRadius;
        float damagePerTick = trapData.Damage; // Sát thương mỗi tick

        Debug.Log($"[Server] Poison Gas Trap activated. Duration: {duration}s, Radius: {radius}m");

        while (elapsed < duration)
        {
            // Find all potential targets in radius
            Collider[] overlaps = Physics.OverlapSphere(transform.position, radius, LayerMask.GetMask("Player"));
            List<GameObject> currentTicks = new List<GameObject>();

            foreach (var col in overlaps)
            {
                if (IsTargetValid(col.gameObject))
                {
                    currentTicks.Add(col.gameObject);
                    
                    // Apply damage
                    var health = col.gameObject.GetComponent<Health>();
                    if (health != null && health.IsAlive())
                    {
                        health.Damage(damagePerTick, transform.position, Vector3.zero, 0);
                        Debug.Log($"[Server] Poison Gas applied {damagePerTick} damage to {col.gameObject.name}");
                    }

                    // If player is newly entered the gas, turn on their UI overlay
                    if (!affectedPlayers.Contains(col.gameObject))
                    {
                        affectedPlayers.Add(col.gameObject);
                        var netObj = col.gameObject.GetComponent<NetworkObject>();
                        if (netObj != null)
                        {
                            RPC_TogglePoisonOverlay(netObj.InputAuthority, netObj.Id, true);
                        }
                    }
                }
            }

            // If player left the gas area, turn off their UI overlay
            for (int i = affectedPlayers.Count - 1; i >= 0; --i)
            {
                var p = affectedPlayers[i];
                if (p == null || !currentTicks.Contains(p))
                {
                    if (p != null)
                    {
                        var netObj = p.GetComponent<NetworkObject>();
                        if (netObj != null)
                        {
                            RPC_TogglePoisonOverlay(netObj.InputAuthority, netObj.Id, false);
                        }
                    }
                    affectedPlayers.RemoveAt(i);
                }
            }

            yield return new WaitForSeconds(tickInterval);
            elapsed += tickInterval;
        }

        // Clean up: turn off overlay for any remaining players in zone
        foreach (var p in affectedPlayers)
        {
            if (p != null)
            {
                var netObj = p.GetComponent<NetworkObject>();
                if (netObj != null)
                {
                    RPC_TogglePoisonOverlay(netObj.InputAuthority, netObj.Id, false);
                }
            }
        }
        affectedPlayers.Clear();

        // Despawn the trap
        DespawnTrap();
    }

    [Rpc(RpcSources.StateAuthority, RpcTargets.InputAuthority)]
    private void RPC_TogglePoisonOverlay([RpcTarget] PlayerRef targetPlayer, NetworkId victimId, bool show)
    {
        // Resolve the victim GameObject using NetworkId on the client
        var victimNetObj = Runner.FindObject(victimId);
        if (victimNetObj != null)
        {
            var overlay = victimNetObj.GetComponentInChildren<PoisonScreenOverlay>();
            if (overlay != null)
            {
                overlay.SetOverlayActive(show);
            }
        }
    }

    // Draw the gas radius in editor for debugging
    private void OnDrawGizmosSelected()
    {
        if (trapData != null)
        {
            Gizmos.color = new Color(0, 1, 0, 0.3f);
            Gizmos.DrawSphere(transform.position, trapData.EffectRadius);
        }
    }
}