# tests/integration/api/v1/admin/test_inventory.py
"""
Integration tests for admin inventory management endpoints.

Tests the /api/v1/admin/inventory/* endpoints.
All endpoints require admin JWT authentication.
"""

import pytest


@pytest.mark.integration
@pytest.mark.api
@pytest.mark.admin
@pytest.mark.inventory
class TestAdminInventoryAPI:
    """Tests for admin inventory management endpoints."""

    # ========================================================================
    # List & Statistics Tests
    # ========================================================================

    def test_get_all_inventory_admin(
        self, client, admin_headers, test_inventory, test_vendor
    ):
        """Test admin getting all inventory."""
        response = client.get("/api/v1/admin/inventory", headers=admin_headers)

        assert response.status_code == 200
        data = response.json()
        assert "inventories" in data
        assert "total" in data
        assert "skip" in data
        assert "limit" in data
        assert data["total"] >= 1
        assert len(data["inventories"]) >= 1

        # Check that test inventory is in the response
        inventory_ids = [i["id"] for i in data["inventories"]]
        assert test_inventory.id in inventory_ids

    def test_get_all_inventory_non_admin(self, client, auth_headers):
        """Test non-admin trying to access inventory endpoint."""
        response = client.get("/api/v1/admin/inventory", headers=auth_headers)

        assert response.status_code == 403
        data = response.json()
        assert data["error_code"] == "ADMIN_REQUIRED"

    def test_get_all_inventory_with_vendor_filter(
        self, client, admin_headers, test_inventory, test_vendor
    ):
        """Test admin filtering inventory by vendor."""
        response = client.get(
            "/api/v1/admin/inventory",
            params={"vendor_id": test_vendor.id},
            headers=admin_headers,
        )

        assert response.status_code == 200
        data = response.json()
        assert data["total"] >= 1
        assert data["vendor_filter"] == test_vendor.id
        # All inventory should be from the filtered vendor
        for item in data["inventories"]:
            assert item["vendor_id"] == test_vendor.id

    def test_get_all_inventory_with_location_filter(
        self, client, admin_headers, test_inventory
    ):
        """Test admin filtering inventory by location."""
        location = test_inventory.location[:5]  # Partial match
        response = client.get(
            "/api/v1/admin/inventory",
            params={"location": location},
            headers=admin_headers,
        )

        assert response.status_code == 200
        data = response.json()
        # All items should have matching location
        for item in data["inventories"]:
            assert location.upper() in item["location"].upper()

    def test_get_all_inventory_with_low_stock_filter(
        self, client, admin_headers, test_inventory, db
    ):
        """Test admin filtering inventory by low stock threshold."""
        # Set test inventory to low stock
        test_inventory.quantity = 5
        db.commit()

        response = client.get(
            "/api/v1/admin/inventory",
            params={"low_stock": 10},
            headers=admin_headers,
        )

        assert response.status_code == 200
        data = response.json()
        # All items should have quantity <= threshold
        for item in data["inventories"]:
            assert item["quantity"] <= 10

    def test_get_all_inventory_pagination(
        self, client, admin_headers, test_inventory
    ):
        """Test admin inventory pagination."""
        response = client.get(
            "/api/v1/admin/inventory",
            params={"skip": 0, "limit": 10},
            headers=admin_headers,
        )

        assert response.status_code == 200
        data = response.json()
        assert data["skip"] == 0
        assert data["limit"] == 10

    def test_get_inventory_stats_admin(
        self, client, admin_headers, test_inventory
    ):
        """Test admin getting inventory statistics."""
        response = client.get(
            "/api/v1/admin/inventory/stats", headers=admin_headers
        )

        assert response.status_code == 200
        data = response.json()
        assert "total_entries" in data
        assert "total_quantity" in data
        assert "total_reserved" in data
        assert "total_available" in data
        assert "low_stock_count" in data
        assert "vendors_with_inventory" in data
        assert "unique_locations" in data
        assert data["total_entries"] >= 1

    def test_get_inventory_stats_non_admin(self, client, auth_headers):
        """Test non-admin trying to access inventory stats."""
        response = client.get(
            "/api/v1/admin/inventory/stats", headers=auth_headers
        )

        assert response.status_code == 403

    def test_get_low_stock_items_admin(
        self, client, admin_headers, test_inventory, db
    ):
        """Test admin getting low stock items."""
        # Set test inventory to low stock
        test_inventory.quantity = 3
        db.commit()

        response = client.get(
            "/api/v1/admin/inventory/low-stock",
            params={"threshold": 10},
            headers=admin_headers,
        )

        assert response.status_code == 200
        data = response.json()
        assert isinstance(data, list)
        # All items should have quantity <= threshold
        for item in data:
            assert item["quantity"] <= 10

    def test_get_vendors_with_inventory_admin(
        self, client, admin_headers, test_inventory, test_vendor
    ):
        """Test admin getting vendors with inventory."""
        response = client.get(
            "/api/v1/admin/inventory/vendors", headers=admin_headers
        )

        assert response.status_code == 200
        data = response.json()
        assert "vendors" in data
        assert isinstance(data["vendors"], list)
        assert len(data["vendors"]) >= 1

        # Check that test_vendor is in the list
        vendor_ids = [v["id"] for v in data["vendors"]]
        assert test_vendor.id in vendor_ids

    def test_get_inventory_locations_admin(
        self, client, admin_headers, test_inventory
    ):
        """Test admin getting inventory locations."""
        response = client.get(
            "/api/v1/admin/inventory/locations", headers=admin_headers
        )

        assert response.status_code == 200
        data = response.json()
        assert "locations" in data
        assert isinstance(data["locations"], list)
        assert len(data["locations"]) >= 1
        assert test_inventory.location in data["locations"]

    # ========================================================================
    # Vendor-Specific Tests
    # ========================================================================

    def test_get_vendor_inventory_admin(
        self, client, admin_headers, test_inventory, test_vendor
    ):
        """Test admin getting vendor-specific inventory."""
        response = client.get(
            f"/api/v1/admin/inventory/vendors/{test_vendor.id}",
            headers=admin_headers,
        )

        assert response.status_code == 200
        data = response.json()
        assert "inventories" in data
        assert "total" in data
        assert data["vendor_filter"] == test_vendor.id
        assert data["total"] >= 1

        # All inventory should be from this vendor
        for item in data["inventories"]:
            assert item["vendor_id"] == test_vendor.id

    def test_get_vendor_inventory_not_found(self, client, admin_headers):
        """Test admin getting inventory for non-existent vendor."""
        response = client.get(
            "/api/v1/admin/inventory/vendors/99999",
            headers=admin_headers,
        )

        assert response.status_code == 404
        data = response.json()
        assert data["error_code"] == "VENDOR_NOT_FOUND"

    def test_get_product_inventory_admin(
        self, client, admin_headers, test_inventory, test_product
    ):
        """Test admin getting product inventory summary."""
        response = client.get(
            f"/api/v1/admin/inventory/products/{test_product.id}",
            headers=admin_headers,
        )

        assert response.status_code == 200
        data = response.json()
        assert data["product_id"] == test_product.id
        assert "total_quantity" in data
        assert "total_reserved" in data
        assert "total_available" in data
        assert "locations" in data

    def test_get_product_inventory_not_found(self, client, admin_headers):
        """Test admin getting inventory for non-existent product."""
        response = client.get(
            "/api/v1/admin/inventory/products/99999",
            headers=admin_headers,
        )

        assert response.status_code == 404
        data = response.json()
        assert data["error_code"] == "PRODUCT_NOT_FOUND"

    # ========================================================================
    # Inventory Modification Tests
    # ========================================================================

    def test_set_inventory_admin(
        self, client, admin_headers, test_product, test_vendor
    ):
        """Test admin setting inventory for a product."""
        inventory_data = {
            "vendor_id": test_vendor.id,
            "product_id": test_product.id,
            "location": "ADMIN_TEST_WAREHOUSE",
            "quantity": 150,
        }

        response = client.post(
            "/api/v1/admin/inventory/set",
            headers=admin_headers,
            json=inventory_data,
        )

        assert response.status_code == 200, f"Failed: {response.json()}"
        data = response.json()
        assert data["product_id"] == test_product.id
        assert data["vendor_id"] == test_vendor.id
        assert data["quantity"] == 150
        assert data["location"] == "ADMIN_TEST_WAREHOUSE"

    def test_set_inventory_non_admin(
        self, client, auth_headers, test_product, test_vendor
    ):
        """Test non-admin trying to set inventory."""
        inventory_data = {
            "vendor_id": test_vendor.id,
            "product_id": test_product.id,
            "location": "WAREHOUSE_A",
            "quantity": 100,
        }

        response = client.post(
            "/api/v1/admin/inventory/set",
            headers=auth_headers,
            json=inventory_data,
        )

        assert response.status_code == 403

    def test_set_inventory_vendor_not_found(
        self, client, admin_headers, test_product
    ):
        """Test admin setting inventory for non-existent vendor."""
        inventory_data = {
            "vendor_id": 99999,
            "product_id": test_product.id,
            "location": "WAREHOUSE_A",
            "quantity": 100,
        }

        response = client.post(
            "/api/v1/admin/inventory/set",
            headers=admin_headers,
            json=inventory_data,
        )

        assert response.status_code == 404
        data = response.json()
        assert data["error_code"] == "VENDOR_NOT_FOUND"

    def test_adjust_inventory_add_admin(
        self, client, admin_headers, test_inventory, test_vendor, test_product
    ):
        """Test admin adding to inventory."""
        original_qty = test_inventory.quantity

        adjust_data = {
            "vendor_id": test_vendor.id,
            "product_id": test_product.id,
            "location": test_inventory.location,
            "quantity": 25,
            "reason": "Admin restocking",
        }

        response = client.post(
            "/api/v1/admin/inventory/adjust",
            headers=admin_headers,
            json=adjust_data,
        )

        assert response.status_code == 200
        data = response.json()
        assert data["quantity"] == original_qty + 25

    def test_adjust_inventory_remove_admin(
        self, client, admin_headers, test_inventory, test_vendor, test_product, db
    ):
        """Test admin removing from inventory."""
        # Ensure we have enough inventory
        test_inventory.quantity = 100
        db.commit()

        adjust_data = {
            "vendor_id": test_vendor.id,
            "product_id": test_product.id,
            "location": test_inventory.location,
            "quantity": -10,
            "reason": "Admin adjustment",
        }

        response = client.post(
            "/api/v1/admin/inventory/adjust",
            headers=admin_headers,
            json=adjust_data,
        )

        assert response.status_code == 200
        data = response.json()
        assert data["quantity"] == 90

    def test_adjust_inventory_insufficient(
        self, client, admin_headers, test_inventory, test_vendor, test_product, db
    ):
        """Test admin trying to remove more than available."""
        # Set low inventory
        test_inventory.quantity = 5
        db.commit()

        adjust_data = {
            "vendor_id": test_vendor.id,
            "product_id": test_product.id,
            "location": test_inventory.location,
            "quantity": -100,
        }

        response = client.post(
            "/api/v1/admin/inventory/adjust",
            headers=admin_headers,
            json=adjust_data,
        )

        # Service wraps InsufficientInventoryException in ValidationException
        assert response.status_code == 422
        data = response.json()
        # Error is wrapped - check message contains relevant info
        assert "error_code" in data
        assert "insufficient" in data.get("message", "").lower() or data["error_code"] in [
            "INSUFFICIENT_INVENTORY",
            "VALIDATION_ERROR",
        ]

    def test_update_inventory_admin(
        self, client, admin_headers, test_inventory
    ):
        """Test admin updating inventory entry."""
        update_data = {
            "quantity": 200,
        }

        response = client.put(
            f"/api/v1/admin/inventory/{test_inventory.id}",
            headers=admin_headers,
            json=update_data,
        )

        assert response.status_code == 200
        data = response.json()
        assert data["quantity"] == 200

    def test_update_inventory_not_found(self, client, admin_headers):
        """Test admin updating non-existent inventory."""
        update_data = {"quantity": 100}

        response = client.put(
            "/api/v1/admin/inventory/99999",
            headers=admin_headers,
            json=update_data,
        )

        assert response.status_code == 404
        data = response.json()
        assert data["error_code"] == "INVENTORY_NOT_FOUND"

    def test_delete_inventory_admin(
        self, client, admin_headers, test_product, test_vendor, db
    ):
        """Test admin deleting inventory entry."""
        # Create a new inventory entry to delete
        from models.database.inventory import Inventory

        new_inventory = Inventory(
            product_id=test_product.id,
            vendor_id=test_vendor.id,
            warehouse="strassen",
            bin_location="DEL-01-01",
            location="TO_DELETE_WAREHOUSE",
            quantity=50,
        )
        db.add(new_inventory)
        db.commit()
        db.refresh(new_inventory)
        inventory_id = new_inventory.id

        response = client.delete(
            f"/api/v1/admin/inventory/{inventory_id}",
            headers=admin_headers,
        )

        assert response.status_code == 200
        data = response.json()
        assert "message" in data
        assert "deleted" in data["message"].lower()

        # Verify it's deleted
        deleted = db.query(Inventory).filter(Inventory.id == inventory_id).first()
        assert deleted is None

    def test_delete_inventory_not_found(self, client, admin_headers):
        """Test admin deleting non-existent inventory."""
        response = client.delete(
            "/api/v1/admin/inventory/99999",
            headers=admin_headers,
        )

        assert response.status_code == 404
        data = response.json()
        assert data["error_code"] == "INVENTORY_NOT_FOUND"

    def test_delete_inventory_non_admin(
        self, client, auth_headers, test_inventory
    ):
        """Test non-admin trying to delete inventory."""
        response = client.delete(
            f"/api/v1/admin/inventory/{test_inventory.id}",
            headers=auth_headers,
        )

        assert response.status_code == 403