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

/**
 * Shared scaffolding for Amazon DataZone HTTP bindings.
 *
 * NOT exported from `index.ts` — every thin `{Op}Http.ts` in this service is
 * a `Layer.effect(Cap, make…HttpBinding({ … }))` over one of the two builders
 * below. Everything except the operation and the IAM action list is
 * boilerplate: DataZone authorizes every action on the domain resource, so
 * the deploy-time half always grants `actions` on the bound domain's ARN.
 */

/**
 * Build the impl Effect for a domain-scoped DataZone operation: the runtime
 * callable injects the bound {@link Domain}'s id as `domainIdentifier` into
 * every request, and the deploy-time half grants `actions` on the domain ARN.
 */
export const makeDataZoneDomainHttpBinding = <
  I extends { domainIdentifier: string },
  A,
  E,
  R,
>(options: {
  /** Fully-qualified binding tag, e.g. `AWS.DataZone.Search`. */
  tag: string;
  /** The distilled operation; `domainIdentifier` is injected. */
  operation: Effect.Effect<(input: I) => Effect.Effect<A, E>, never, R>;
  /** IAM actions granted on the domain ARN. */
  actions: readonly string[];
}) =>
  Effect.gen(function* () {
    const op = yield* options.operation;

    return Effect.fn(function* (domain: Domain) {
      const DomainId = yield* domain.domainId;
      if (!globalThis.__ALCHEMY_RUNTIME__) {
        const host = yield* Binding.Host;
        if (isBindingHost(host)) {
          yield* host.bind`Allow(${host}, ${options.tag}(${domain}))`({
            policyStatements: [
              {
                Effect: "Allow",
                Action: [...options.actions],
                Resource: [domain.domainArn],
              },
            ],
          });
        }
      }
      return Effect.fn(`${options.tag}(${domain.LogicalId})`)(function* (
        request?: Omit<I, "domainIdentifier">,
      ) {
        const domainIdentifier = yield* DomainId;
        return yield* op({ ...request, domainIdentifier } as I);
      });
    });
  });

/**
 * Build the impl Effect for an environment-scoped DataZone operation: the
 * runtime callable injects the bound {@link Environment}'s domain id and
 * environment id, and the deploy-time half grants `actions` on the parent
 * domain's ARN (DataZone authorizes every action on the domain resource).
 */
export const makeDataZoneEnvironmentHttpBinding = <
  I extends { domainIdentifier: string; environmentIdentifier: string },
  A,
  E,
  R,
>(options: {
  /** Fully-qualified binding tag, e.g. `AWS.DataZone.GetEnvironmentCredentials`. */
  tag: string;
  /** The distilled operation; both identifiers are injected. */
  operation: Effect.Effect<(input: I) => Effect.Effect<A, E>, never, R>;
  /** IAM actions granted on the parent domain ARN. */
  actions: readonly string[];
}) =>
  Effect.gen(function* () {
    const op = yield* options.operation;

    return Effect.fn(function* (environment: Environment) {
      const DomainId = yield* environment.domainId;
      const EnvironmentId = yield* environment.environmentId;
      if (!globalThis.__ALCHEMY_RUNTIME__) {
        const host = yield* Binding.Host;
        if (isBindingHost(host)) {
          yield* host.bind`Allow(${host}, ${options.tag}(${environment}))`({
            policyStatements: [
              {
                Effect: "Allow",
                Action: [...options.actions],
                Resource: [
                  Output.interpolate`arn:aws:datazone:*:*:domain/${environment.domainId}`,
                ],
              },
            ],
          });
        }
      }
      return Effect.fn(`${options.tag}(${environment.LogicalId})`)(function* (
        request?: Omit<I, "domainIdentifier" | "environmentIdentifier">,
      ) {
        return yield* op({
          ...request,
          domainIdentifier: yield* DomainId,
          environmentIdentifier: yield* EnvironmentId,
        } as I);
      });
    });
  });