import * as autoscaling from "@distilled.cloud/aws/auto-scaling";
import * as Effect from "effect/Effect";
import * as Layer from "effect/Layer";
import * as Binding from "../../Binding.ts";
import { isInstance } from "../EC2/Instance.ts";
import { isBindingHost } from "../Lambda/Function.ts";
import type { AutoScalingGroup } from "./AutoScalingGroup.ts";
import { DescribeAutoScalingGroup } from "./DescribeAutoScalingGroup.ts";

// Bespoke (not the shared scaffold): `describeAutoScalingGroups` takes the
// group name inside the `AutoScalingGroupNames` array and the client unwraps
// the single-element response.
export const DescribeAutoScalingGroupHttp = Layer.effect(
  DescribeAutoScalingGroup,
  Effect.gen(function* () {
    const describe = yield* autoscaling.describeAutoScalingGroups;

    return Effect.fn(function* (group: AutoScalingGroup) {
      const AutoScalingGroupName = yield* group.autoScalingGroupName;
      if (!globalThis.__ALCHEMY_RUNTIME__) {
        const host = yield* Binding.Host;
        if (isBindingHost(host) || isInstance(host)) {
          yield* host.bind`Allow(${host}, AWS.AutoScaling.DescribeAutoScalingGroup(${group}))`(
            {
              policyStatements: [
                {
                  Effect: "Allow",
                  Action: ["autoscaling:DescribeAutoScalingGroups"],
                  Resource: ["*"],
                },
              ],
            },
          );
        }
      }
      return Effect.fn(
        `AWS.AutoScaling.DescribeAutoScalingGroup(${group.LogicalId})`,
      )(function* () {
        const result = yield* describe({
          AutoScalingGroupNames: [yield* AutoScalingGroupName],
        });
        return result.AutoScalingGroups?.[0];
      });
    });
  }),
);