using UnityEngine;

/// <summary>
/// Individual quest marker component that displays quest information and handles interactions
/// </summary>
public class QuestMarker : MonoBehaviour
{
    [Header("Marker Components")]
    [SerializeField] private ActiveQuest activeQuest;
    [SerializeField] private GameObject completionArea;

    [Header("Visual Settings")]
    [SerializeField] private bool showFloatingText = true;
    [SerializeField] private float bobSpeed = 1f;
    [SerializeField] private float bobHeight = 0.5f;

    private Vector3 originalPosition;
    private Renderer markerRenderer;
    private TextMesh floatingText;
    private float time = 0f;

    public ActiveQuest ActiveQuest => activeQuest;

    private void Start()
    {
        originalPosition = transform.position;
        markerRenderer = GetComponent<Renderer>();

        if (showFloatingText)
        {
            CreateFloatingText();
        }
    }

    private void Update()
    {
        // Gentle bobbing animation
        if (bobHeight > 0f)
        {
            time += Time.deltaTime * bobSpeed;
            float newY = originalPosition.y + Mathf.Sin(time) * bobHeight;
            transform.position = new Vector3(originalPosition.x, newY, originalPosition.z);
        }

        // Update floating text if quest exists
        if (activeQuest != null && floatingText != null)
        {
            UpdateFloatingText();
        }
    }

    /// <summary>
    /// Initialize the quest marker with quest data
    /// </summary>
    public void Initialize(ActiveQuest quest, GameObject area = null)
    {
        activeQuest = quest;
        completionArea = area;

        if (completionArea != null)
        {
            completionArea.transform.SetParent(transform);
        }

        // Update visual representation
        UpdateMarkerVisuals();
    }

    /// <summary>
    /// Set the marker color
    /// </summary>
    public void SetColor(Color color)
    {
        if (markerRenderer != null)
        {
            markerRenderer.material.color = color;
        }

        // Also color the completion area if it exists
        if (completionArea != null)
        {
            var areaRenderer = completionArea.GetComponent<Renderer>();
            if (areaRenderer != null)
            {
                var areaColor = color;
                areaColor.a = 0.3f; // Make area semi-transparent
                areaRenderer.material.color = areaColor;
            }
        }
    }

    private void CreateFloatingText()
    {
        // Create floating text object
        GameObject textObject = new GameObject("QuestText");
        textObject.transform.SetParent(transform);
        textObject.transform.localPosition = Vector3.up * 1.5f;

        // Add TextMesh component
        floatingText = textObject.AddComponent<TextMesh>();
        floatingText.anchor = TextAnchor.MiddleCenter;
        floatingText.alignment = TextAlignment.Center;
        floatingText.fontSize = 16;
        floatingText.color = Color.white;

        // Make text face camera (simple billboard)
        textObject.transform.LookAt(Camera.main?.transform ?? Camera.current?.transform);
        textObject.transform.Rotate(0, 180, 0); // Flip to face camera correctly
    }

    private void UpdateFloatingText()
    {
        if (floatingText == null || activeQuest?.questData == null) return;

        // Show quest title and time remaining
        string questText = activeQuest.questData.questTitle;

        // Add time remaining with color coding
        var urgency = activeQuest.GetUrgency();
        string timeRemaining = activeQuest.GetTimeRemainingString();

        // Color code based on urgency
        string timeColor = urgency switch
        {
            QuestUrgency.Low => "white",
            QuestUrgency.Medium => "yellow",
            QuestUrgency.High => "orange",
            QuestUrgency.Critical => "red",
            _ => "white"
        };

        floatingText.text = $"{questText}\n<color={timeColor}>{timeRemaining}</color>";

        // Make text face camera
        if (Camera.main != null)
        {
            Vector3 directionToCamera = Camera.main.transform.position - floatingText.transform.position;
            floatingText.transform.rotation = Quaternion.LookRotation(-directionToCamera);
        }
    }

    private void UpdateMarkerVisuals()
    {
        if (activeQuest?.questData == null) return;

        // Scale marker based on quest importance/difficulty
        float scale = activeQuest.questData.difficulty switch
        {
            QuestDifficulty.Easy => 0.8f,
            QuestDifficulty.Normal => 1.0f,
            QuestDifficulty.Hard => 1.2f,
            QuestDifficulty.Legendary => 1.5f,
            _ => 1.0f
        };

        transform.localScale = Vector3.one * scale;

        // Adjust bob speed based on urgency
        var urgency = activeQuest.GetUrgency();
        bobSpeed = urgency switch
        {
            QuestUrgency.Low => 0.5f,
            QuestUrgency.Medium => 1.0f,
            QuestUrgency.High => 1.5f,
            QuestUrgency.Critical => 2.5f,
            _ => 1.0f
        };
    }

    /// <summary>
    /// Called when player clicks on the quest marker
    /// </summary>
    private void OnMouseDown()
    {
        if (activeQuest?.questData == null) return;

        Debug.Log($"🎯 Clicked quest marker: {activeQuest.questData.questTitle}");

        // Show quest info in UI or console
        ShowQuestInfo();
    }

    private void ShowQuestInfo()
    {
        if (activeQuest?.questData == null) return;

        var quest = activeQuest.questData;
        string info = $"Quest: {quest.questTitle}\n" +
                     $"Description: {quest.questDescription}\n" +
                     $"Time Remaining: {activeQuest.GetTimeRemainingString()}\n" +
                     $"Progress: {activeQuest.GetOverallProgress() * 100:F0}%\n" +
                     $"Reward: {quest.goldReward}g, {quest.renownReward} renown";

        Debug.Log($"📋 Quest Info:\n{info}");

        // TODO: Show in actual UI popup instead of just debug log
    }

    /// <summary>
    /// Check if position is within quest completion area
    /// </summary>
    public bool IsPositionInCompletionArea(Vector3 position)
    {
        if (activeQuest?.questData == null) return false;

        float distance = Vector3.Distance(transform.position, position);
        return distance <= activeQuest.questData.completionRadius;
    }

    /// <summary>
    /// Get distance to this quest marker from given position
    /// </summary>
    public float GetDistanceFrom(Vector3 position)
    {
        return Vector3.Distance(transform.position, position);
    }

    /// <summary>
    /// Show completion effect when quest is completed
    /// </summary>
    public void ShowCompletionEffect()
    {
        // Simple completion effect - change color and scale
        if (markerRenderer != null)
        {
            markerRenderer.material.color = Color.green;
        }

        // Animate scale up then destroy
        StartCoroutine(CompletionAnimation());
    }

    private System.Collections.IEnumerator CompletionAnimation()
    {
        Vector3 originalScale = transform.localScale;
        float duration = 1f;
        float elapsed = 0f;

        while (elapsed < duration)
        {
            elapsed += Time.deltaTime;
            float progress = elapsed / duration;

            // Scale up then down
            float scaleMultiplier = 1f + Mathf.Sin(progress * Mathf.PI) * 0.5f;
            transform.localScale = originalScale * scaleMultiplier;

            // Fade out
            if (markerRenderer != null)
            {
                Color color = markerRenderer.material.color;
                color.a = 1f - progress;
                markerRenderer.material.color = color;
            }

            yield return null;
        }

        // Destroy the marker
        Destroy(gameObject);
    }

    #region Editor Gizmos
    private void OnDrawGizmos()
    {
        if (activeQuest?.questData == null) return;

        // Draw completion radius
        Gizmos.color = Color.yellow;
        Gizmos.DrawWireSphere(transform.position, activeQuest.questData.completionRadius);

        // Draw quest info
        var urgency = activeQuest.GetUrgency();
        Gizmos.color = urgency switch
        {
            QuestUrgency.Low => Color.green,
            QuestUrgency.Medium => Color.yellow,
            QuestUrgency.High => new Color(1f, 0.5f, 0f), // orange
            QuestUrgency.Critical => Color.red,
            _ => Color.white
        };

        Gizmos.DrawWireCube(transform.position, Vector3.one * 0.5f);
    }
    #endregion
}