import { getTableName } from "drizzle-orm";
import { getTableConfig } from "drizzle-orm/pg-core";
import { describe, expect, it } from "vitest";
import {
  ekklesiaCoreAccount,
  ekklesiaCoreSession,
  ekklesiaCoreUser,
  ekklesiaCoreVerification,
  identityAdapterSchema,
} from "../src/identity/schema.js";

describe("Core identity Drizzle schema", () => {
  it("uses explicit, unambiguous ekklesia_core_* physical table names", () => {
    expect(getTableName(ekklesiaCoreUser)).toBe("ekklesia_core_user");
    expect(getTableName(ekklesiaCoreSession)).toBe("ekklesia_core_session");
    expect(getTableName(ekklesiaCoreAccount)).toBe("ekklesia_core_account");
    expect(getTableName(ekklesiaCoreVerification)).toBe("ekklesia_core_verification");
  });

  it("explicitly maps every Better Auth logical model to its physical table object", () => {
    expect(identityAdapterSchema).toEqual({
      account: ekklesiaCoreAccount,
      session: ekklesiaCoreSession,
      user: ekklesiaCoreUser,
      verification: ekklesiaCoreVerification,
    });
  });

  it("gives the user table a unique email and a default-false verification flag", () => {
    const config = getTableConfig(ekklesiaCoreUser);
    const columns = Object.fromEntries(config.columns.map((column) => [column.name, column]));

    expect(columns.id?.primary).toBe(true);
    expect(columns.email?.isUnique).toBe(true);
    expect(columns.email?.notNull).toBe(true);
    expect(columns.email_verified?.hasDefault).toBe(true);
    expect(columns.email_verified?.notNull).toBe(true);
  });

  it("scopes session and account rows to a user with cascading delete", () => {
    for (const table of [ekklesiaCoreSession, ekklesiaCoreAccount]) {
      const config = getTableConfig(table);
      expect(config.foreignKeys).toHaveLength(1);
      const foreignKey = config.foreignKeys[0];
      if (!foreignKey) {
        throw new Error("Expected a foreign key.");
      }
      const reference = foreignKey.reference();
      expect(reference.columns.map((column) => column.name)).toEqual(["user_id"]);
      expect(reference.foreignColumns.map((column) => column.name)).toEqual(["id"]);
      expect(getTableName(reference.foreignTable)).toBe("ekklesia_core_user");
      expect(foreignKey.onDelete).toBe("cascade");
    }
  });

  it("indexes session.user_id, account.user_id, and verification.identifier for lookup", () => {
    expect(
      getTableConfig(ekklesiaCoreSession).indexes.map((index) =>
        index.config.columns.map((column) => ("name" in column ? column.name : undefined)),
      ),
    ).toEqual([["user_id"]]);
    expect(
      getTableConfig(ekklesiaCoreAccount).indexes.map((index) =>
        index.config.columns.map((column) => ("name" in column ? column.name : undefined)),
      ),
    ).toEqual([["user_id"]]);
    expect(
      getTableConfig(ekklesiaCoreVerification).indexes.map((index) =>
        index.config.columns.map((column) => ("name" in column ? column.name : undefined)),
      ),
    ).toEqual([["identifier"]]);
  });

  it("requires a unique session token", () => {
    const config = getTableConfig(ekklesiaCoreSession);
    const token = config.columns.find((column) => column.name === "token");
    expect(token?.isUnique).toBe(true);
    expect(token?.notNull).toBe(true);
  });

  it("keeps every table in the default public PostgreSQL schema", () => {
    for (const table of [
      ekklesiaCoreUser,
      ekklesiaCoreSession,
      ekklesiaCoreAccount,
      ekklesiaCoreVerification,
    ]) {
      expect(getTableConfig(table).schema).toBeUndefined();
    }
  });
});