import { loadHostConfiguration } from "@ekklesia/core/host";
import { createMailProviderConfig } from "@ekklesia/core/mail";
import { createStorageProviderConfig } from "@ekklesia/core/storage";
import { describe, expect, it } from "vitest";
import { createApiRuntimeConfig } from "../src/config.js";
import { readConfigFromEnvironment } from "../src/server.js";

/**
 * `pnpm doctor` and `startApi` must reach the same conclusions from the same environment. They
 * previously could not: each executable read its own subset of the variables, and Doctor's subset
 * omitted `S3_*` and the module secrets entirely.
 *
 * These tests assert the property directly — the API's startup inputs and the inputs Doctor
 * validates come from one `loadHostConfiguration` call and produce identical validated
 * configuration, including every default.
 */

const secretKey = "sk-example-secret-material";
const smtpPassword = "sup3r-secret-relay-password";

function environment(
  overrides: Readonly<Record<string, string | undefined>> = {},
): Readonly<Record<string, string | undefined>> {
  return {
    DATABASE_URL: "postgres://ekklesia@db.example.org:5432/ekklesia",
    EKKLESIA_IDENTITY_BASE_URL: "https://ekklesia.example.org",
    EKKLESIA_IDENTITY_SECRET: "b7QwZ2rTn4Xs9LmVpKdF6yHc3JgEuNaW",
    EKKLESIA_IDENTITY_TRUSTED_ORIGINS: "https://ekklesia.example.org",
    NODE_ENV: "production",
    ...overrides,
  };
}

const configuredInfrastructure = Object.freeze({
  EKKLESIA_SMTP_FROM_ADDRESS: "noreply@example.org",
  EKKLESIA_SMTP_HOST: "smtp.example.org",
  EKKLESIA_SMTP_PASSWORD: smtpPassword,
  EKKLESIA_SMTP_USERNAME: "relay@example.org",
  S3_ACCESS_KEY: "AKIAEXAMPLEACCESSID",
  S3_ENDPOINT: "https://storage.example.org",
  S3_SECRET_KEY: secretKey,
});

/** Exactly what Doctor validates, from exactly the same load the API performs. */
function doctorView(env: Readonly<Record<string, string | undefined>>) {
  const host = loadHostConfiguration(env);
  return {
    mail: createMailProviderConfig(host.mail, { environment: host.environment }),
    storage: createStorageProviderConfig(host.storage, { environment: host.environment }),
  };
}

function apiView(env: Readonly<Record<string, string | undefined>>) {
  const { environment: resolved, input } = readConfigFromEnvironment(env);
  return createApiRuntimeConfig(input, { environment: resolved });
}

describe("host configuration parity between startApi and Doctor", () => {
  it("derives identical object-storage configuration, defaults included", () => {
    const env = environment(configuredInfrastructure);

    expect(apiView(env).storage).toEqual(doctorView(env).storage);
    // Named explicitly rather than only compared, so a change to either default fails here loudly.
    expect(apiView(env).storage).toEqual({
      accessKey: "AKIAEXAMPLEACCESSID",
      bucketPrefix: "ekklesia",
      deliveryEndpoint: "https://storage.example.org",
      endpoint: "https://storage.example.org",
      forcePathStyle: true,
      region: "us-east-1",
      secretKey,
    });
  });

  it("derives identical outbound-email configuration, defaults included", () => {
    const env = environment(configuredInfrastructure);

    expect(apiView(env).mail).toEqual(doctorView(env).mail);
    expect(apiView(env).mail).toMatchObject({
      host: "smtp.example.org",
      port: 587,
      security: "starttls",
    });
  });

  it("agrees that an installation with neither service is complete", () => {
    const env = environment();

    expect(apiView(env).storage).toBeUndefined();
    expect(doctorView(env).storage).toBeUndefined();
    expect(apiView(env).mail).toBeUndefined();
    expect(doctorView(env).mail).toBeUndefined();
  });

  it("carries every storage field the direct-delivery pass established", () => {
    const env = environment({
      ...configuredInfrastructure,
      S3_BUCKET_PREFIX: "rogc",
      S3_DELIVERY_ENDPOINT: "https://files.example.org",
      S3_FORCE_PATH_STYLE: "false",
      S3_REGION: "eu-west-1",
    });

    expect(apiView(env).storage).toEqual(doctorView(env).storage);
    expect(apiView(env).storage).toMatchObject({
      bucketPrefix: "rogc",
      deliveryEndpoint: "https://files.example.org",
      forcePathStyle: false,
      region: "eu-west-1",
    });
  });

  it("rejects the same malformed environment with the same sanitized code", () => {
    for (const [overrides, code] of [
      [{ S3_ENDPOINT: "https://storage.example.org" }, "STORAGE_ACCESS_KEY_MISSING"],
      [{ ...configuredInfrastructure, S3_ENDPOINT: "not-a-url" }, "STORAGE_ENDPOINT_INVALID"],
      [
        { ...configuredInfrastructure, S3_ENDPOINT: "http://storage.example.org" },
        "STORAGE_ENDPOINT_INSECURE_IN_PRODUCTION",
      ],
      [
        { ...configuredInfrastructure, EKKLESIA_SMTP_PASSWORD: undefined },
        "MAIL_USERNAME_WITHOUT_PASSWORD",
      ],
      [{ ...configuredInfrastructure, EKKLESIA_SMTP_PORT: "70000" }, "MAIL_PORT_INVALID"],
    ] as const) {
      const env = environment(overrides);
      expect(() => apiView(env)).toThrowError(expect.objectContaining({ code }));
      expect(() => doctorView(env)).toThrowError(expect.objectContaining({ code }));
    }
  });

  it("resolves module secrets from the same source the runtime is given", () => {
    const env = environment({
      EKKLESIA_MODULE_SECRET__ANNOUNCEMENTS__STORAGE_CREDENTIAL: "module-secret-material",
    });

    expect(
      readConfigFromEnvironment(env).moduleSecrets.get("announcements", "storageCredential"),
    ).toBe("module-secret-material");
    expect(loadHostConfiguration(env).moduleSecrets.get("announcements", "storageCredential")).toBe(
      "module-secret-material",
    );
  });

  it("reads only this listener's own address and port outside the shared loader", () => {
    const config = apiView(
      environment({ EKKLESIA_API_HOST: "0.0.0.0", EKKLESIA_API_PORT: "8080" }),
    );

    expect(config.host).toBe("0.0.0.0");
    expect(config.port).toBe(8080);
    // Defaults, when unset, stay where they always were.
    const defaults = apiView(environment());
    expect(defaults.host).toBe("127.0.0.1");
    expect(defaults.port).toBe(3000);
  });

  it("interprets a set-but-empty flag identically instead of one side ignoring it", () => {
    // Doctor used to drop any falsy identity value before validating, so `startApi` refused to
    // start on `EKKLESIA_PUBLIC_SIGNUP_ENABLED=` while Doctor reported the deployment ready.
    const env = environment({ EKKLESIA_PUBLIC_SIGNUP_ENABLED: "" });

    expect(loadHostConfiguration(env).identity.publicSignupEnabled).toBe("");
    expect(() => apiView(env)).toThrowError(
      expect.objectContaining({ code: "PUBLIC_SIGNUP_ENABLED_INVALID" }),
    );
  });
});