import { NextResponse } from "next/server";
import { z } from "zod";

import { assertAgencyAdmin, getRouteAgencyContextOrThrow } from "@/lib/agency";
import { assertRateLimit } from "@/lib/api/rate-limit";
import { assertSameOrigin } from "@/lib/api/security";
import {
  parseSubscriptionStatusDetailsFromInfo,
  pleskCliCall,
} from "@/lib/plesk/client";
import { createSupabaseRouteClient } from "@/lib/supabase/route";

const actionSchema = z.object({
  action: z.enum(["suspend", "unsuspend"]),
  subscription_id: z.string().uuid().optional(),
});

const LOG_EXCERPT_LIMIT = 500;

const DOMAIN_ACTION_EVENTS = {
  suspend: {
    requested: "domain_suspend_requested",
    succeeded: "domain_suspend_succeeded",
    failed: "domain_suspend_failed",
  },
  unsuspend: {
    requested: "domain_unsuspend_requested",
    succeeded: "domain_unsuspend_succeeded",
    failed: "domain_unsuspend_failed",
  },
} as const;

function excerpt(value: string | null | undefined) {
  if (!value) return null;
  const trimmed = value.trim();
  if (!trimmed) return null;
  return trimmed.length > LOG_EXCERPT_LIMIT
    ? `${trimmed.slice(0, LOG_EXCERPT_LIMIT)}…`
    : trimmed;
}

async function insertActionLogBestEffort(
  supabase: any,
  payload: Record<string, unknown>,
) {
  try {
    const { error } = await supabase.from("actions_log").insert(payload);
    if (error) {
      console.error("[actions_log] insert failed", error.message);
    }
  } catch (error) {
    console.error("[actions_log] insert threw", error);
  }
}

export async function POST(
  req: Request,
  { params }: { params: { id: string } },
) {
  const supabase = createSupabaseRouteClient() as any;
  let context: Awaited<ReturnType<typeof getRouteAgencyContextOrThrow>> | null =
    null;
  let domain: { id: string; subscription_id: string | null } | null = null;
  let subscription: {
    id: string;
    plesk_subscription_id: string;
    plesk_instance_id: string;
  } | null = null;
  let requestedAction: "suspend" | "unsuspend" | null = null;
  const startedAt = Date.now();

  try {
    assertSameOrigin(req);

    context = await getRouteAgencyContextOrThrow();
    assertAgencyAdmin(context);
    assertRateLimit(`plesk-domain-action:${context.userId}`, 10, 60_000);

    const payload = actionSchema.parse(await req.json());
    const { action } = payload;
    requestedAction = action;

    const { data: domainRow, error: domainError } = await supabase
      .from("plesk_domains")
      .select("id, agency_id, plesk_instance_id, subscription_id")
      .eq("id", params.id)
      .eq("agency_id", context.agencyId)
      .single();

    if (domainError || !domainRow) {
      throw new Error("Domain not found");
    }

    const resolvedSubscriptionId =
      payload.subscription_id ??
      (domainRow.subscription_id ? String(domainRow.subscription_id) : null);

    domain = {
      id: String(domainRow.id),
      subscription_id: resolvedSubscriptionId,
    };

    if (!resolvedSubscriptionId) {
      throw new Error("Domain is not linked to a subscription");
    }

    const { data: subscriptionRow, error: subscriptionError } = await supabase
      .from("plesk_subscriptions")
      .select("id, plesk_subscription_id, plesk_instance_id")
      .eq("id", resolvedSubscriptionId)
      .eq("agency_id", context.agencyId)
      .single();

    if (subscriptionError || !subscriptionRow) {
      throw new Error("Subscription not found");
    }

    subscription = {
      id: String(subscriptionRow.id),
      plesk_subscription_id: String(subscriptionRow.plesk_subscription_id),
      plesk_instance_id: String(subscriptionRow.plesk_instance_id),
    };

    const { data: instance, error: instanceError } = await supabase
      .from("plesk_instances")
      .select("id, base_url, auth_type, encrypted_secret")
      .eq("id", subscriptionRow.plesk_instance_id)
      .eq("agency_id", context.agencyId)
      .single();

    if (instanceError || !instance) {
      throw new Error("Plesk instance not found");
    }

    const connection = {
      baseUrl: instance.base_url,
      authType: instance.auth_type,
      encryptedSecret: instance.encrypted_secret,
    } as const;

    const domainIdentifier = subscription.plesk_subscription_id;
    const siteArgs =
      action === "suspend"
        ? ["--suspend", domainIdentifier]
        : ["--on", domainIdentifier];

    await insertActionLogBestEffort(supabase, {
      agency_id: context.agencyId,
      actor_user_id: context.userId,
      target_type: "plesk_domain",
      target_id: domain.id,
      action: DOMAIN_ACTION_EVENTS[action].requested,
      status: "pending",
      metadata: {
        domain_id: domain.id,
        subscription_id: subscription.id,
        plesk_instance_id: subscription.plesk_instance_id,
        plesk_subscription_id: subscription.plesk_subscription_id,
        cli_command: "site",
        cli_args: siteArgs,
      },
    });

    const siteResult = await pleskCliCall(connection, "site", siteArgs);

    const fallbackStatus = action === "suspend" ? "suspended" : "active";
    let refreshedStatus = fallbackStatus;
    let refreshedStatusRaw: string | null = null;
    let refreshErrorMessage: string | null = null;

    try {
      const infoResult = await pleskCliCall(connection, "subscription", [
        "--info",
        domainIdentifier,
      ]);

      const parsed = parseSubscriptionStatusDetailsFromInfo(
        infoResult.stdout ?? "",
      );
      refreshedStatus = parsed.status;
      refreshedStatusRaw = parsed.statusRaw;

      if (
        action === "unsuspend" &&
        refreshedStatus === "suspended" &&
        (refreshedStatusRaw ?? "").toLowerCase().includes("subscriber")
      ) {
        throw new Error(
          "Domain remains suspended because its subscriber/customer account is suspended.",
        );
      }
    } catch (refreshError) {
      refreshErrorMessage =
        refreshError instanceof Error
          ? refreshError.message.slice(0, 1000)
          : "subscription_status_refresh_failed";

      await insertActionLogBestEffort(supabase, {
        agency_id: context.agencyId,
        actor_user_id: context.userId,
        target_type: "plesk_subscription",
        target_id: subscription.id,
        action: "subscription_status_refresh_failed",
        status: "failed",
        error_message: refreshErrorMessage,
        metadata: {
          subscription_id: subscription.id,
          plesk_subscription_id: subscription.plesk_subscription_id,
          plesk_instance_id: subscription.plesk_instance_id,
          source: "domain_action",
          domain_id: domain.id,
        },
      });
    }

    await supabase
      .from("plesk_subscriptions")
      .update({
        status: refreshedStatus,
        status_raw: refreshedStatusRaw,
        last_status_sync_at: new Date().toISOString(),
      })
      .eq("id", subscription.id)
      .eq("agency_id", context.agencyId);

    await supabase
      .from("plesk_domains")
      .update({ status: refreshedStatus })
      .eq("agency_id", context.agencyId)
      .eq("subscription_id", subscription.id);

    await insertActionLogBestEffort(supabase, {
      agency_id: context.agencyId,
      actor_user_id: context.userId,
      target_type: "plesk_domain",
      target_id: domain.id,
      action: DOMAIN_ACTION_EVENTS[action].succeeded,
      status: "success",
      metadata: {
        duration_ms: Date.now() - startedAt,
        domain_id: domain.id,
        subscription_id: subscription.id,
        plesk_instance_id: subscription.plesk_instance_id,
        plesk_subscription_id: subscription.plesk_subscription_id,
        cli_command: "site",
        cli_args: siteArgs,
        cli_exit_code: siteResult.code,
        cli_stdout_excerpt: excerpt(siteResult.stdout),
        cli_stderr_excerpt: excerpt(siteResult.stderr),
        refreshed_status: refreshedStatus,
        refresh_error: refreshErrorMessage,
      },
    });

    return NextResponse.json({ ok: true });
  } catch (error) {
    if (context && domain) {
      const message =
        error instanceof Error ? error.message : "Domain action failed";
      if (requestedAction) {
        await insertActionLogBestEffort(supabase, {
          agency_id: context.agencyId,
          actor_user_id: context.userId,
          target_type: "plesk_domain",
          target_id: domain.id,
          action: DOMAIN_ACTION_EVENTS[requestedAction].failed,
          status: "failed",
          error_message: message,
          metadata: {
            duration_ms: Date.now() - startedAt,
            domain_id: domain.id,
            subscription_id: subscription?.id ?? domain.subscription_id,
            plesk_instance_id: subscription?.plesk_instance_id ?? null,
            plesk_subscription_id: subscription?.plesk_subscription_id ?? null,
          },
        });
      } else {
        await insertActionLogBestEffort(supabase, {
          agency_id: context.agencyId,
          actor_user_id: context.userId,
          target_type: "plesk_domain",
          target_id: domain.id,
          action: "domain_action_failed",
          status: "failed",
          error_message: message,
          metadata: {
            duration_ms: Date.now() - startedAt,
            domain_id: domain.id,
            subscription_id: subscription?.id ?? domain.subscription_id,
            plesk_instance_id: subscription?.plesk_instance_id ?? null,
            plesk_subscription_id: subscription?.plesk_subscription_id ?? null,
          },
        });
      }
    }

    return NextResponse.json(
      {
        error: error instanceof Error ? error.message : "Domain action failed",
      },
      { status: 400 },
    );
  }
}