// SPDX-FileCopyrightText: 2026 Kerstin Humm <kerstin@erictapen.name>
//
// SPDX-License-Identifier: AGPL-3.0-or-later

import { AnnotatedWrapper, Rule } from "../types.js";
import { buildReference } from "../utils.js";

export default {
  name: "",
  validate: (self) => {
    let result = new AnnotatedWrapper();

    if ("displayEndTime" in self) {
      result.assertBoolean(self, ["displayEndTime"], {
        kind: "Violation",
        id: "DisplayEndTimeNotABoolean",
        text: "displayEndTime is not a boolean",
        reference: buildReference({
          url:
            "https://codeberg.org/fediverse/fep/src/branch/main/fep/8a8e/displayEndTime",
        }),
      });
    } else {
      if ("endTime" in self) {
        result.annotateAt(["endTime"], {
          kind: "Note",
          id: "EndTimeButNoDisplayEndTime",
          text:
            "The endTime attribute is set. Specify displayEndTime to be deliberate about its meaning.",
          reference: buildReference({
            anchor: "events-with-open-end",
            text:
              "If the event is open-ended, or the endTime is not intended to be displayed to humans, the https://w3id.org/fep/8a8e/displayEndTime attribute SHOULD be used and set to false.",
          }),
        });
      } else {
        result.annotateAt([], {
          kind: "Warning",
          id: "NoEndTimeAndNoDisplayEndTime",
          text:
            "The endTime attribute is not set and there is no displayEndTime",
          reference: buildReference({
            anchor: "events-with-open-end",
            text:
              "If the event is open-ended, or the endTime is not intended to be displayed to humans, the https://w3id.org/fep/8a8e/displayEndTime attribute SHOULD be used and set to false.",
          }),
        });
      }
    }

    return result.value;
  },
  tests: [
    {
      value: {},
      result: { annotations: ["NoEndTimeSet"], object: {} },
    },
    {
      value: { "displayEndTime": "not a boolean" },
      result: {
        annotations: [],
        object: { "displayEndTime": "DisplayEndTimeNotABoolean" },
      },
    },
    {
      value: { "endTime": "somevalue" },
      result: {
        annotations: [],
        object: { "endTime": "EndTimeButNoDisplayEndTime" },
      },
    },
  ],
} satisfies Rule;