added inventory and stamina system

Assets/Scripts/PickupItem.cs

@@ -0,0 +1,156 @@
+using UnityEngine;
+
+/// <summary>
+/// Attach to any pickup object. Spins + bobs like MGS rations.
+/// Assign an ItemDefinition asset for full weapon/equip support,
+/// or just fill itemName for a simple non-weapon pickup.
+/// </summary>
+public class PickupItem : MonoBehaviour
+{
+    [Header("Item")]
+    [Tooltip("Preferred: drag an ItemDefinition ScriptableObject here.")]
+    public ItemDefinition definition;
+
+    [Tooltip("Fallback name if no ItemDefinition is set.")]
+    public string itemName = "Item";
+    public Sprite itemIcon;
+
+    [Header("Spin & Bob")]
+    public float spinSpeed = 120f;
+    public float bobHeight = 0.18f;
+    public float bobSpeed  = 2.2f;
+
+    [Header("Pickup")]
+    public float   pickupRadius = 2.0f;
+    public KeyCode pickupKey    = KeyCode.E;
+
+    [Header("FX")]
+    public GameObject pickupParticlesPrefab;
+    public AudioClip  pickupSound;
+
+    // ─────────────────────────────────────────
+    private Vector3     _startPos;
+    private Transform   _playerTransform;
+    private Inventory   _inventory;
+    private AudioSource _audioSource;
+    private bool        _collected = false;
+
+    // Prompt display
+    private bool _inRange = false;
+
+    void Start()
+    {
+        _startPos = transform.position;
+
+        Player player = FindObjectOfType<Player>();
+        if (player != null)
+        {
+            _playerTransform = player.transform;
+            _inventory       = player.GetComponent<Inventory>();
+        }
+
+        _audioSource = gameObject.AddComponent<AudioSource>();
+        _audioSource.spatialBlend = 1f;
+        _audioSource.playOnAwake  = false;
+
+        // If we have a definition, use its name/icon
+        if (definition != null)
+        {
+            itemName = definition.itemName;
+            itemIcon = definition.icon;
+        }
+    }
+
+    void Update()
+    {
+        if (_collected) return;
+
+        // ── Spin ──────────────────────────────
+        transform.Rotate(Vector3.up, spinSpeed * Time.deltaTime, Space.World);
+
+        // ── Bob ───────────────────────────────
+        float newY = _startPos.y + Mathf.Sin(Time.time * bobSpeed * Mathf.PI * 2f) * bobHeight;
+        transform.position = new Vector3(transform.position.x, newY, transform.position.z);
+
+        // ── Pickup check ─────────────────────
+        if (_playerTransform == null) return;
+
+        float dist = Vector3.Distance(transform.position, _playerTransform.position);
+        _inRange = dist <= pickupRadius;
+
+        if (_inRange && Input.GetKeyDown(pickupKey))
+            Collect();
+    }
+
+    void OnGUI()
+    {
+        if (_collected || !_inRange) return;
+
+        // World-to-screen prompt
+        Vector3 screenPos = Camera.main != null
+            ? Camera.main.WorldToScreenPoint(_startPos + Vector3.up * (bobHeight + 0.4f))
+            : Vector3.zero;
+
+        if (screenPos.z < 0) return; // behind camera
+
+        float sx = screenPos.x;
+        float sy = Screen.height - screenPos.y; // flip y
+
+        string label  = definition != null ? definition.itemName : itemName;
+        bool isWeapon = definition != null && definition.type == ItemDefinition.ItemType.Weapon;
+        string prompt = $"[{pickupKey}] Pick up {label}";
+
+        GUIStyle bg = new GUIStyle(GUI.skin.box);
+        bg.fontSize  = 12;
+        bg.fontStyle = FontStyle.Bold;
+        bg.normal.textColor = isWeapon ? new Color(1f, 0.85f, 0.2f) : Color.white;
+
+        Vector2 size    = bg.CalcSize(new GUIContent(prompt));
+        Rect    bgRect  = new Rect(sx - size.x * 0.5f - 6f, sy - size.y - 4f, size.x + 12f, size.y + 6f);
+
+        // Dark backing box
+        Color prev = GUI.color;
+        GUI.color = new Color(0, 0, 0, 0.65f);
+        GUI.DrawTexture(bgRect, Texture2D.whiteTexture);
+        GUI.color = prev;
+
+        GUI.Label(bgRect, "  " + prompt + "  ", bg);
+    }
+
+    void OnDrawGizmosSelected()
+    {
+        Gizmos.color = Color.yellow;
+        Gizmos.DrawWireSphere(transform.position, pickupRadius);
+    }
+
+    void Collect()
+    {
+        _collected = true;
+        _inRange   = false;
+
+        if (_inventory != null)
+        {
+            if (definition != null)
+                _inventory.AddItem(definition, autoEquip: true);
+            else
+                _inventory.AddItem(itemName, itemIcon);
+        }
+        else
+        {
+            Debug.LogWarning("PickupItem: No Inventory found on player!");
+        }
+
+        if (pickupParticlesPrefab != null)
+            Instantiate(pickupParticlesPrefab, transform.position, Quaternion.identity);
+
+        if (pickupSound != null)
+        {
+            _audioSource.PlayOneShot(pickupSound);
+            Destroy(gameObject, pickupSound.length);
+        }
+        else
+        {
+            Destroy(gameObject);
+        }
+    }
+}