feat(ansible): host edit page Ansible target link/create/unlink section

steward/hosts/routes.py

@@ -147,14 +147,38 @@ async def create_host():
 @hosts_bp.get("/<host_id>/edit")
 @require_role(UserRole.operator)
 async def edit_host(host_id: str):
+    from steward.models.ansible_inventory import AnsibleTarget
+    from sqlalchemy.orm import selectinload
+
     async with current_app.db_sessionmaker() as db:
         result = await db.execute(select(Host).where(Host.id == host_id))
         host = result.scalar_one_or_none()
-    if host is None:
-        return "Not found", 404
+        if host is None:
+            return "Not found", 404
+
+        linked_result = await db.execute(
+            select(AnsibleTarget)
+            .where(AnsibleTarget.host_id == host_id)
+            .options(selectinload(AnsibleTarget.groups))
+        )
+        linked_target = linked_result.scalar_one_or_none()
+
+        # Only show targets not yet linked to any host (plus the currently linked one)
+        linkable_result = await db.execute(
+            select(AnsibleTarget)
+            .where(AnsibleTarget.host_id.is_(None))
+            .order_by(AnsibleTarget.name)
+        )
+        linkable_targets = linkable_result.scalars().all()
+
     return await render_template(
-        "hosts/form.html", host=host, probe_types=list(ProbeType),
-        ansible_sources=_ansible_source_names())
+        "hosts/form.html",
+        host=host,
+        probe_types=list(ProbeType),
+        ansible_sources=_ansible_source_names(),
+        linked_target=linked_target,
+        linkable_targets=linkable_targets,
+    )
 
 
 @hosts_bp.post("/<host_id>")
@@ -178,6 +202,57 @@ async def update_host(host_id: str):
     return redirect(url_for("hosts.list_hosts"))
 
 
+@hosts_bp.post("/<host_id>/ansible-link")
+@require_role(UserRole.operator)
+async def ansible_link(host_id: str):
+    """Link, unlink, or create an AnsibleTarget from this host."""
+    from steward.models.ansible_inventory import AnsibleTarget
+
+    form = await request.form
+    action = form.get("action", "")
+
+    async with current_app.db_sessionmaker() as db:
+        async with db.begin():
+            if action == "unlink":
+                linked_result = await db.execute(
+                    select(AnsibleTarget).where(AnsibleTarget.host_id == host_id)
+                )
+                linked = linked_result.scalar_one_or_none()
+                if linked:
+                    linked.host_id = None
+
+            elif action == "link":
+                target_id = form.get("target_id", "").strip()
+                if target_id:
+                    result = await db.execute(
+                        select(AnsibleTarget).where(AnsibleTarget.id == target_id)
+                    )
+                    target = result.scalar_one_or_none()
+                    if target:
+                        # Clear any previous link for this host first
+                        old_result = await db.execute(
+                            select(AnsibleTarget).where(AnsibleTarget.host_id == host_id)
+                        )
+                        old = old_result.scalar_one_or_none()
+                        if old and old.id != target_id:
+                            old.host_id = None
+                        target.host_id = host_id
+
+            elif action == "create":
+                host_result = await db.execute(select(Host).where(Host.id == host_id))
+                host = host_result.scalar_one_or_none()
+                if host:
+                    new_target = AnsibleTarget(
+                        id=str(uuid.uuid4()),
+                        name=host.name,
+                        address=host.address,
+                        host_id=host_id,
+                    )
+                    db.add(new_target)
+
+    return redirect(f"/hosts/{host_id}/edit")
+
+
 @hosts_bp.post("/<host_id>/run-playbook")
 @require_role(UserRole.operator)
 async def run_playbook(host_id: str):