import { beforeEach, describe, expect, it, vi } from "vite-plus/test";
import { PROVIDER_SEND_TURN_MAX_ATTACHMENTS } from "@t3tools/contracts";

const missingFileCause = new Error("missing file");
const files = new Map<string, { base64: string; deleted: boolean }>();

vi.mock("expo-file-system", () => ({
  File: class {
    readonly uri: string;

    constructor(uri: string) {
      this.uri = uri;
    }

    get exists(): boolean {
      return files.has(this.uri) && files.get(this.uri)?.deleted === false;
    }

    async base64(): Promise<string> {
      const entry = files.get(this.uri);
      if (!entry || entry.deleted) {
        throw missingFileCause;
      }
      return entry.base64;
    }

    delete(): void {
      const entry = files.get(this.uri);
      if (entry) {
        entry.deleted = true;
      }
    }
  },
}));

vi.mock("./uuid", () => ({
  uuidv4: () => "attachment-id",
}));

import { convertPastedImagesToAttachments, isOwnedPastedImageUri } from "./composerImages";

describe("native pasted image cleanup", () => {
  beforeEach(() => {
    files.clear();
  });

  it("recognizes only files created in the native composer paste directory", () => {
    expect(
      isOwnedPastedImageUri(
        "file:///private/var/mobile/Containers/Data/Application/app/tmp/t3-composer-paste/id.png",
      ),
    ).toBe(true);
    expect(isOwnedPastedImageUri("file:///private/var/mobile/photos/id.png")).toBe(false);
    expect(isOwnedPastedImageUri("https://example.com/t3-composer-paste/id.png")).toBe(false);
  });

  it("converts owned files to data-backed previews and deletes the source", async () => {
    const uri =
      "file:///private/var/mobile/Containers/Data/Application/app/tmp/t3-composer-paste/id.png";
    files.set(uri, { base64: "aGVsbG8=", deleted: false });

    const attachments = await convertPastedImagesToAttachments({
      uris: [uri],
      existingCount: 0,
    });

    expect(attachments).toEqual([
      expect.objectContaining({
        dataUrl: "data:image/png;base64,aGVsbG8=",
        previewUri: "data:image/png;base64,aGVsbG8=",
      }),
    ]);
    expect(files.get(uri)?.deleted).toBe(true);
  });

  it("deletes rejected and overflow owned files without deleting user-owned files", async () => {
    const rejected =
      "file:///private/var/mobile/Containers/Data/Application/app/tmp/t3-composer-paste/bad.png";
    const overflow =
      "file:///private/var/mobile/Containers/Data/Application/app/tmp/t3-composer-paste/overflow.png";
    const userOwned = "file:///private/var/mobile/photos/library.png";
    files.set(rejected, { base64: "", deleted: false });
    files.set(overflow, { base64: "aGVsbG8=", deleted: false });
    files.set(userOwned, { base64: "aGVsbG8=", deleted: false });

    await convertPastedImagesToAttachments({
      uris: [rejected, overflow, userOwned],
      existingCount: PROVIDER_SEND_TURN_MAX_ATTACHMENTS - 1,
    });

    expect(files.get(rejected)?.deleted).toBe(true);
    expect(files.get(overflow)?.deleted).toBe(true);
    expect(files.get(userOwned)?.deleted).toBe(false);
  });

  it("reports structured context when reading a pasted image fails", async () => {
    const uri = "file:///private/var/mobile/photos/signed-secret-token/missing.png?token=private";
    const warn = vi.spyOn(console, "warn").mockImplementation(() => undefined);

    await expect(
      convertPastedImagesToAttachments({ uris: [uri], existingCount: 0 }),
    ).resolves.toEqual([]);
    expect(warn).toHaveBeenCalledWith(
      "[composer-images] failed to read pasted image",
      expect.objectContaining({
        _tag: "ComposerImageOperationError",
        operation: "read-pasted-image",
        uriLength: uri.length,
        uriProtocol: "file:",
        cause: missingFileCause,
        message: `Composer image operation read-pasted-image failed for a file: URI (length ${uri.length}).`,
      }),
    );
    const error = warn.mock.calls[0]?.[1];
    expect(error).not.toHaveProperty("uri");
    expect(String(error)).not.toContain("signed-secret-token");
    expect(String(error)).not.toContain("token=private");

    warn.mockRestore();
  });
});