import { MessageFlags } from "discord-api-types/v10";
import { beforeAll, beforeEach, describe, expect, it } from "vitest";

let clearDiscordComponentEntries: typeof import("./components-registry.js").clearDiscordComponentEntries;
let registerDiscordComponentEntries: typeof import("./components-registry.js").registerDiscordComponentEntries;
let resolveDiscordComponentEntry: typeof import("./components-registry.js").resolveDiscordComponentEntry;
let resolveDiscordModalEntry: typeof import("./components-registry.js").resolveDiscordModalEntry;
let buildDiscordComponentMessage: typeof import("./components.js").buildDiscordComponentMessage;
let buildDiscordComponentMessageFlags: typeof import("./components.js").buildDiscordComponentMessageFlags;
let readDiscordComponentSpec: typeof import("./components.js").readDiscordComponentSpec;

beforeAll(async () => {
  ({
    clearDiscordComponentEntries,
    registerDiscordComponentEntries,
    resolveDiscordComponentEntry,
    resolveDiscordModalEntry,
  } = await import("./components-registry.js"));
  ({ buildDiscordComponentMessage, buildDiscordComponentMessageFlags, readDiscordComponentSpec } =
    await import("./components.js"));
});

describe("discord components", () => {
  it("builds v2 containers with modal trigger", () => {
    const spec = readDiscordComponentSpec({
      text: "Choose a path",
      blocks: [
        {
          type: "actions",
          buttons: [{ label: "Approve", style: "success", callbackData: "codex:approve" }],
        },
      ],
      modal: {
        title: "Details",
        callbackData: "codex:modal",
        allowedUsers: ["discord:user-1"],
        fields: [{ type: "text", label: "Requester" }],
      },
    });
    if (!spec) {
      throw new Error("Expected component spec to be parsed");
    }

    const result = buildDiscordComponentMessage({ spec });
    expect(result.components).toHaveLength(1);
    expect(result.components[0]?.isV2).toBe(true);
    expect(buildDiscordComponentMessageFlags(result.components)).toBe(MessageFlags.IsComponentsV2);
    expect(result.modals).toHaveLength(1);

    const trigger = result.entries.find((entry) => entry.kind === "modal-trigger");
    expect(trigger?.modalId).toBe(result.modals[0]?.id);
    expect(result.entries.find((entry) => entry.kind === "button")?.callbackData).toBe(
      "codex:approve",
    );
    expect(result.modals[0]?.callbackData).toBe("codex:modal");
    expect(result.modals[0]?.allowedUsers).toEqual(["discord:user-1"]);
  });

  it("requires options for modal select fields", () => {
    expect(() =>
      readDiscordComponentSpec({
        modal: {
          title: "Details",
          fields: [{ type: "select", label: "Priority" }],
        },
      }),
    ).toThrow("options");
  });

  it("requires attachment references for file blocks", () => {
    expect(() =>
      readDiscordComponentSpec({
        blocks: [{ type: "file", file: "https://example.com/report.pdf" }],
      }),
    ).toThrow("attachment://");
    expect(() =>
      readDiscordComponentSpec({
        blocks: [{ type: "file", file: "attachment://" }],
      }),
    ).toThrow("filename");
  });
});

describe("discord component registry", () => {
  beforeEach(() => {
    clearDiscordComponentEntries();
  });

  const componentsRegistryModuleUrl = new URL("./components-registry.ts", import.meta.url).href;

  it("registers and consumes component entries", () => {
    registerDiscordComponentEntries({
      entries: [{ id: "btn_1", kind: "button", label: "Confirm" }],
      modals: [
        {
          id: "mdl_1",
          title: "Details",
          fields: [{ id: "fld_1", name: "name", label: "Name", type: "text" }],
        },
      ],
      messageId: "msg_1",
      ttlMs: 1000,
    });

    const entry = resolveDiscordComponentEntry({ id: "btn_1", consume: false });
    expect(entry?.messageId).toBe("msg_1");

    const modal = resolveDiscordModalEntry({ id: "mdl_1", consume: false });
    expect(modal?.messageId).toBe("msg_1");

    const consumed = resolveDiscordComponentEntry({ id: "btn_1" });
    expect(consumed?.id).toBe("btn_1");
    expect(resolveDiscordComponentEntry({ id: "btn_1" })).toBeNull();
  });

  it("shares registry state across duplicate module instances", async () => {
    const first = (await import(
      `${componentsRegistryModuleUrl}?t=first-${Date.now()}`
    )) as typeof import("./components-registry.js");
    const second = (await import(
      `${componentsRegistryModuleUrl}?t=second-${Date.now()}`
    )) as typeof import("./components-registry.js");

    first.clearDiscordComponentEntries();
    first.registerDiscordComponentEntries({
      entries: [{ id: "btn_shared", kind: "button", label: "Shared" }],
      modals: [],
    });

    expect(second.resolveDiscordComponentEntry({ id: "btn_shared", consume: false })).toMatchObject(
      {
        id: "btn_shared",
        label: "Shared",
      },
    );

    second.clearDiscordComponentEntries();
  });
});