import * as Effect from "effect/Effect";
import * as Binding from "../../Binding.ts";
import { isBindingHost } from "../Lambda/Function.ts";
import type { LicenseConfiguration } from "./LicenseConfiguration.ts";

/**
 * Shared HTTP scaffolding for the AWS License Manager runtime bindings.
 *
 * NOT exported from `index.ts` — every `{Op}Http.ts` in this service is a
 * thin `Layer.effect(Cap, make…HttpBinding({ … }))` over one of the builders
 * below. Everything except the operation, the IAM action, and (for the
 * configuration-scoped builder) the injected ARN is boilerplate.
 *
 * Per the `license-manager` service authorization reference, only the
 * `license-configuration` resource type supports resource-level scoping;
 * every other action (the checkout data plane, license/grant reads, the
 * resource inventory) authorizes on `Resource: ["*"]`.
 */

/**
 * Build the impl Effect for an account-level License Manager operation (the
 * license checkout data plane, license/grant reads, resource inventory, and
 * license-specification operations — none of which are resource-scoped in
 * IAM).
 */
export const makeLicenseManagerHttpBinding = <
  I extends object,
  A,
  E,
  R,
>(options: {
  /**
   * Short capability name used in the binding sid and runtime span, e.g.
   * `"CheckoutLicense"`.
   */
  capability: string;
  /** IAM actions granted on `Resource: ["*"]`. */
  iamActions: readonly string[];
  /** The distilled operation implementing the capability. */
  operation: Effect.Effect<(input: I) => Effect.Effect<A, E>, never, R>;
}) =>
  Effect.gen(function* () {
    const op = yield* options.operation;

    return Effect.fn(function* () {
      if (!globalThis.__ALCHEMY_RUNTIME__) {
        const host = yield* Binding.Host;
        if (isBindingHost(host)) {
          yield* host.bind`Allow(${host}, AWS.LicenseManager.${options.capability}())`(
            {
              policyStatements: [
                {
                  Effect: "Allow",
                  Action: [...options.iamActions],
                  Resource: ["*"],
                },
              ],
            },
          );
        }
      }
      return Effect.fn(`AWS.LicenseManager.${options.capability}`)(function* (
        request?: I,
      ) {
        return yield* op((request ?? {}) as I);
      });
    });
  });

/**
 * Build the impl Effect for a License Manager operation scoped to one
 * {@link LicenseConfiguration}: the deploy-time half grants `iamActions` on
 * the bound configuration's ARN (the `license-configuration` resource type
 * supports resource-level authorization), and the runtime half injects the
 * configuration's ARN as the request's `LicenseConfigurationArn`.
 */
export const makeLicenseConfigurationHttpBinding = <
  I extends { LicenseConfigurationArn?: string },
  A,
  E,
  R,
>(options: {
  /**
   * Short capability name used in the binding sid and runtime span, e.g.
   * `"ListUsageForLicenseConfiguration"`.
   */
  capability: string;
  /** IAM actions granted on the bound configuration's ARN. */
  iamActions: readonly string[];
  /** The distilled operation; `LicenseConfigurationArn` is injected. */
  operation: Effect.Effect<(input: I) => Effect.Effect<A, E>, never, R>;
}) =>
  Effect.gen(function* () {
    const op = yield* options.operation;

    return Effect.fn(function* (configuration: LicenseConfiguration) {
      // Output yields a DEFERRED effect — resolve again per invocation below.
      const ConfigurationArn = yield* configuration.licenseConfigurationArn;
      if (!globalThis.__ALCHEMY_RUNTIME__) {
        const host = yield* Binding.Host;
        if (isBindingHost(host)) {
          yield* host.bind`Allow(${host}, AWS.LicenseManager.${options.capability}(${configuration}))`(
            {
              policyStatements: [
                {
                  Effect: "Allow",
                  Action: [...options.iamActions],
                  Resource: [configuration.licenseConfigurationArn],
                },
              ],
            },
          );
        }
      }
      return Effect.fn(
        `AWS.LicenseManager.${options.capability}(${configuration.LogicalId})`,
      )(function* (request?: Omit<I, "LicenseConfigurationArn">) {
        return yield* op({
          ...request,
          LicenseConfigurationArn: yield* ConfigurationArn,
        } as I);
      });
    });
  });