{
  "paths": {
    "/calendars/{id}/subscriptions": {
      "get": {
        "tags": ["Subscriptions"],
        "summary": "List calendar subscriptions",
        "description": "Returns all iCal feed subscriptions for a calendar. Requires `calendars:read` scope.",
        "operationId": "listCalendarSubscriptions",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": { "type": "string", "format": "uuid" },
            "description": "Calendar ID"
          }
        ],
        "responses": {
          "200": {
            "description": "List of subscriptions",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["items", "page"],
                  "properties": {
                    "items": {
                      "type": "array",
                      "items": { "$ref": "#/components/schemas/CalendarSubscription" }
                    },
                    "page": { "$ref": "#/components/schemas/PageInfo" }
                  }
                }
              }
            }
          },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope or permission", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Calendar not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      },
      "post": {
        "tags": ["Subscriptions"],
        "summary": "Add a subscription",
        "description": "Adds an iCal feed subscription to a calendar. Fetches the feed, imports events, and creates a subscription for future syncs. Owner or editor only. Requires `calendars:write` scope.",
        "operationId": "addCalendarSubscription",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": { "type": "string", "format": "uuid" },
            "description": "Calendar ID"
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["url"],
                "properties": {
                  "url": { "type": "string", "format": "uri", "description": "iCal feed URL (http, https, or webcal)", "example": "https://example.com/calendar.ics" },
                  "sync_interval_minutes": { "type": "integer", "nullable": true, "description": "Optional sync interval in minutes" }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Subscription added and events imported",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["ok", "imported", "source"],
                  "properties": {
                    "ok": { "type": "boolean", "example": true },
                    "imported": { "type": "object", "properties": { "events": { "type": "integer", "example": 12 } } },
                    "source": { "type": "string", "format": "uri", "description": "The URL that was imported" }
                  }
                }
              }
            }
          },
          "400": { "description": "Validation error, unreachable URL, or invalid ICS", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope or permission", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Calendar not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    },
    "/calendars/{id}/subscriptions/{subId}": {
      "delete": {
        "tags": ["Subscriptions"],
        "summary": "Delete a subscription",
        "description": "Removes an iCal feed subscription from a calendar. Owner or editor only. Requires `calendars:write` scope.",
        "operationId": "deleteCalendarSubscription",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" }, "description": "Calendar ID" },
          { "name": "subId", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" }, "description": "Subscription ID" }
        ],
        "responses": {
          "200": { "description": "Subscription deleted", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/OkResponse" } } } },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope or permission", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Calendar or subscription not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    },
    "/calendars/{id}/subscriptions/{subId}/sync": {
      "post": {
        "tags": ["Subscriptions"],
        "summary": "Sync a subscription",
        "description": "Triggers an immediate sync of an iCal feed subscription. Fetches the feed and imports/updates events. Owner or editor only. Requires `calendars:write` scope.",
        "operationId": "syncCalendarSubscription",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" }, "description": "Calendar ID" },
          { "name": "subId", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" }, "description": "Subscription ID" }
        ],
        "responses": {
          "200": {
            "description": "Sync completed",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["ok", "imported"],
                  "properties": {
                    "ok": { "type": "boolean", "example": true },
                    "imported": { "type": "object", "properties": { "events": { "type": "integer", "example": 5 } } }
                  }
                }
              }
            }
          },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope or permission", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Calendar or subscription not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    }
  }
}