/**
 * Shared scaffolding for the Incident Manager Contacts (SSM Contacts) 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 builders
 * below. Everything except the operation and the IAM action list is
 * boilerplate:
 *
 * - Contact-scoped operations (`ssm-contacts:StartEngagement`,
 *   `ssm-contacts:ListPagesByContact`) inject the bound {@link Contact}'s
 *   ARN as the request's `ContactId` and are granted on the contact ARN.
 * - Channel-scoped operations (`ssm-contacts:ActivateContactChannel`, …)
 *   inject the bound {@link ContactChannel}'s ARN as `ContactChannelId` and
 *   are granted on the channel ARN.
 * - Rotation-scoped operations (`ssm-contacts:ListRotationShifts`, rotation
 *   overrides) inject the bound {@link Rotation}'s ARN as `RotationId` and
 *   are granted on the rotation ARN.
 * - Account-level operations (engagement / page reads and controls) take
 *   the caller's request as-is and are granted on `*` — engagement and page
 *   ARNs are minted at runtime and cannot be scoped statically.
 */
import * as Effect from "effect/Effect";
import * as Binding from "../../Binding.ts";
import { isBindingHost } from "../Lambda/Function.ts";
import type { Contact } from "./Contact.ts";
import type { ContactChannel } from "./ContactChannel.ts";
import type { Rotation } from "./Rotation.ts";

/**
 * Build the impl Effect for an SSM Contacts operation scoped to a
 * {@link Contact}: the deploy-time half grants `actions` on the bound
 * contact's ARN, and the runtime half injects the contact's ARN as the
 * request's `ContactId` field.
 */
export const makeContactHttpBinding = <
  I extends { ContactId: string },
  A,
  E,
  R,
>(options: {
  /** Fully-qualified binding tag, e.g. `AWS.SSMContacts.StartEngagement`. */
  tag: string;
  /** The distilled operation; `ContactId` is injected from the contact. */
  operation: Effect.Effect<(input: I) => Effect.Effect<A, E>, never, R>;
  /** IAM actions granted on the contact ARN. */
  actions: readonly string[];
}) =>
  Effect.gen(function* () {
    const op = yield* options.operation;

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

/**
 * Build the impl Effect for an SSM Contacts operation scoped to a
 * {@link ContactChannel}: the deploy-time half grants `actions` on the bound
 * channel's ARN, and the runtime half injects the channel's ARN as the
 * request's `ContactChannelId` field.
 */
export const makeContactChannelHttpBinding = <
  I extends { ContactChannelId: string },
  A,
  E,
  R,
>(options: {
  /** Fully-qualified binding tag, e.g. `AWS.SSMContacts.SendActivationCode`. */
  tag: string;
  /** The distilled operation; `ContactChannelId` is injected from the channel. */
  operation: Effect.Effect<(input: I) => Effect.Effect<A, E>, never, R>;
  /** IAM actions granted on the contact channel ARN. */
  actions: readonly string[];
}) =>
  Effect.gen(function* () {
    const op = yield* options.operation;

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

/**
 * Build the impl Effect for an SSM Contacts operation scoped to a
 * {@link Rotation}: the deploy-time half grants `actions` on the bound
 * rotation's ARN, and the runtime half injects the rotation's ARN as the
 * request's `RotationId` field.
 */
export const makeRotationHttpBinding = <
  I extends { RotationId: string },
  A,
  E,
  R,
>(options: {
  /** Fully-qualified binding tag, e.g. `AWS.SSMContacts.ListRotationShifts`. */
  tag: string;
  /** The distilled operation; `RotationId` is injected from the rotation. */
  operation: Effect.Effect<(input: I) => Effect.Effect<A, E>, never, R>;
  /** IAM actions granted on the rotation ARN. */
  actions: readonly string[];
}) =>
  Effect.gen(function* () {
    const op = yield* options.operation;

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

/**
 * Build the impl Effect for an account-level SSM Contacts operation
 * (engagement and page reads/controls). The deploy-time half grants
 * `actions` on `*` — engagement and page ARNs embed runtime-generated ids
 * and cannot be scoped to a deployed resource.
 */
export const makeAccountHttpBinding = <I, A, E, R>(options: {
  /** Fully-qualified binding tag, e.g. `AWS.SSMContacts.StopEngagement`. */
  tag: string;
  /** The distilled operation, invoked with the caller's request as-is. */
  operation: Effect.Effect<(input: I) => Effect.Effect<A, E>, never, R>;
  /** IAM actions granted on `*`. */
  actions: readonly string[];
}) =>
  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}, ${options.tag}())`({
            policyStatements: [
              {
                Effect: "Allow",
                Action: [...options.actions],
                Resource: ["*"],
              },
            ],
          });
        }
      }
      return Effect.fn(options.tag)(function* (request?: I) {
        return yield* op((request ?? {}) as I);
      });
    });
  });