import {
  ModuleDatabaseError,
  type ModuleDatabaseExecutor,
  type ModuleDatabaseParameter,
} from "@ekklesia/contracts";
import { describe, expect, it } from "vitest";
import { findEkklesiaDatabaseError, sql } from "../src/index.js";

describe("the raw Module Database ABI v1 SQL tag", () => {
  it("keeps static SQL unchanged when there are no interpolations", () => {
    expect(sql`SELECT id FROM calendar_events ORDER BY id`).toEqual({
      text: "SELECT id FROM calendar_events ORDER BY id",
      values: [],
    });
  });

  it("turns every interpolation into an ordered PostgreSQL parameter", () => {
    const id = "event-1";
    const active = true;
    expect(sql`SELECT * FROM calendar_events WHERE id = ${id} AND active = ${active}`).toEqual({
      text: "SELECT * FROM calendar_events WHERE id = $1 AND active = $2",
      values: [id, active],
    });
  });

  it("gives repeated values separate positional parameters", () => {
    const value = "same";
    expect(sql`SELECT ${value}, ${value}, ${value}`).toEqual({
      text: "SELECT $1, $2, $3",
      values: [value, value, value],
    });
  });

  it("keeps SQL-injection-sensitive strings bound instead of joining them into SQL", () => {
    const attack = "x'; DROP TABLE calendar_events; --";
    const query = sql`SELECT * FROM calendar_events WHERE title = ${attack}`;
    expect(query.text).toBe("SELECT * FROM calendar_events WHERE title = $1");
    expect(query.text).not.toContain(attack);
    expect(query.values).toEqual([attack]);
  });

  it("preserves bigint, byte arrays, and PostgreSQL arrays as ABI values", () => {
    const bytes = new Uint8Array([0, 127, 255]);
    const identifiers = [1n, 2n, null] as const;
    const query = sql`SELECT ${9_007_199_254_740_993n}, ${bytes}, ${identifiers}`;
    expect(query.values).toEqual([9_007_199_254_740_993n, bytes, identifiers]);
    expect(query.values[1]).toBe(bytes);
    expect(query.values[2]).toBe(identifiers);
  });

  it("does not stringify unsupported values before the ABI executor rejects them", async () => {
    const invalid = new Date("2026-01-02T03:04:05.000Z");
    const query = sql`SELECT ${invalid as unknown as ModuleDatabaseParameter}`;
    expect(query.values[0]).toBe(invalid);

    const executor = {
      abiVersion: 1,
      async query(request: { readonly values?: readonly ModuleDatabaseParameter[] }) {
        if (request.values?.some((value) => value instanceof Date)) {
          throw new ModuleDatabaseError("MODULE_DATABASE_PARAMETER_INVALID");
        }
        throw new Error("Expected the fake ABI validator to reject the value.");
      },
      async transaction() {
        throw new Error("not used");
      },
    } as unknown as ModuleDatabaseExecutor;

    await expect(executor.query(query)).rejects.toMatchObject({
      code: "MODULE_DATABASE_PARAMETER_INVALID",
      name: "ModuleDatabaseError",
    });
  });
});

describe("findEkklesiaDatabaseError", () => {
  it("finds a stable ABI error through wrappers without parsing messages", () => {
    const databaseError = new ModuleDatabaseError("MODULE_DATABASE_QUERY_FAILED", {
      sqlState: "23505",
    });
    const wrapped = new Error("wrapper", { cause: new Error("second", { cause: databaseError }) });
    expect(findEkklesiaDatabaseError(wrapped)).toBe(databaseError);
    expect(findEkklesiaDatabaseError(wrapped)).toMatchObject({
      code: "MODULE_DATABASE_QUERY_FAILED",
      sqlState: "23505",
    });
  });

  it("terminates safely for cause cycles and unrelated errors", () => {
    const cyclic = new Error("cyclic");
    cyclic.cause = cyclic;
    expect(findEkklesiaDatabaseError(cyclic)).toBeUndefined();
    expect(findEkklesiaDatabaseError("not an error")).toBeUndefined();
  });
});