import { selectButtonText } from "../lib/locale";
import type { ButtonTextMap } from "../lib/locale";

export type ActivityRequest = {
  shop: string;
  orderId: string;
  orderNumber?: string;
  locale?: string;
};

export type ActivityConfig = {
  activityId: number;
  apiAppId: string;
  apiSecret: string;
  statusApiUrl: string;
  pushApiUrl: string;
  statusSuccessCode?: number;
  statusActiveRequired?: boolean;
  pushSuccessCode?: number;
  redirectUrl: string;
  buttonText: ButtonTextMap;
  shop?: string;
};

export type OrderDetails = {
  id: string;
  legacyId: string;
  orderNumber?: string;
  email?: string;
  customerId?: string;
  currency: string;
  shopDomain: string;
};

export type StatusResponse = {
  code?: number;
  data?: {
    status?: boolean;
    trigger?: string[];
  };
  msg?: string;
};

export type PushResponse = {
  code?: number;
  data?: unknown;
  msg?: string;
};

export type ThirdPartyResult<TBody> = {
  httpOk: boolean;
  status: number;
  body: TBody;
  requestBody: string;
  responseBody: string;
};

export type PushPayload = {
  activity_id: number;
  event_type: "order_end";
  created_at: number;
  user_id: string;
  email: string;
  event_id: string;
  properties: {
    shop: string;
    currency: string;
    order_id: string;
    order_number: string;
  };
};

export type LogEntry = {
  shop: string;
  orderId: string;
  customerId?: string;
  email?: string;
  activityId: string;
  eventType: string;
  eventId: string;
  status: "success" | "fail";
  requestBody?: string;
  responseBody?: string;
  errorMessage?: string;
};

export type IdempotencyHit = {
  eventId: string;
  redirectUrl: string;
};

export type ActivityDeps = {
  nowMs: () => number;
  uuid: () => string;
  getOrder: (shop: string, orderId: string) => Promise<OrderDetails>;
  getConfig: (shop: string) => Promise<ActivityConfig>;
  findSuccess: (shop: string, orderId: string, activityId: number) => Promise<IdempotencyHit | null>;
  recordSuccess: (entry: {
    shop: string;
    orderId: string;
    activityId: number;
    eventType: "order_end";
    eventId: string;
    redirectUrl: string;
    buttonText: string;
  }) => Promise<void>;
  log: (entry: LogEntry) => Promise<void>;
  callStatus: (config: ActivityConfig) => Promise<ThirdPartyResult<StatusResponse>>;
  callPush: (config: ActivityConfig, payload: PushPayload) => Promise<ThirdPartyResult<PushResponse>>;
};

export type ActivityResponse =
  | {
      success: true;
      redirectUrl: string;
      buttonText: string;
    }
  | {
      success: false;
    };

const ORDER_END_EVENT = "order_end" as const;

export async function runActivityCheck(request: ActivityRequest, deps: ActivityDeps): Promise<ActivityResponse> {
  const normalizedOrderId = normalizeOrderId(request.orderId);
  let order: OrderDetails | undefined;
  let config: ActivityConfig | undefined;
  let eventId = "";

  try {
    order = await deps.getOrder(request.shop, normalizedOrderId);
    config = await deps.getConfig(request.shop);

    const buttonText = selectButtonText(request.locale, config.buttonText);
    const idempotency = await deps.findSuccess(request.shop, normalizedOrderId, config.activityId);
    if (idempotency) {
      return {
        success: true,
        redirectUrl: config.redirectUrl,
        buttonText,
      };
    }

    if (!order.email) {
      await deps.log(failureLog(request.shop, order, config, eventId, "Order email is missing"));
      return { success: false };
    }

    if (!order.customerId) {
      await deps.log(failureLog(request.shop, order, config, eventId, "Order customer id is missing"));
      return { success: false };
    }

    const statusResult = await deps.callStatus(config);
    if (!isActiveStatus(statusResult, config)) {
      await deps.log(
        failureLog(
          request.shop,
          order,
          config,
          eventId,
          "Activity status API did not return active status",
          statusResult.requestBody,
          statusResult.responseBody,
        ),
      );
      return { success: false };
    }

    eventId = deps.uuid();
    const pushPayload: PushPayload = {
      activity_id: config.activityId,
      event_type: ORDER_END_EVENT,
      created_at: deps.nowMs(),
      user_id: order.customerId,
      email: order.email,
      event_id: eventId,
      properties: {
        shop: config.shop || order.shopDomain,
        currency: order.currency,
        order_id: order.legacyId,
        order_number: order.orderNumber || request.orderNumber || order.legacyId,
      },
    };

    const pushResult = await deps.callPush(config, pushPayload);
    if (!isSuccessfulPush(pushResult, config)) {
      await deps.log(
        failureLog(
          request.shop,
          order,
          config,
          eventId,
          "Activity push API failed",
          pushResult.requestBody,
          pushResult.responseBody,
        ),
      );
      return { success: false };
    }

    await deps.recordSuccess({
      shop: request.shop,
      orderId: normalizedOrderId,
      activityId: config.activityId,
      eventType: ORDER_END_EVENT,
      eventId,
      redirectUrl: config.redirectUrl,
      buttonText,
    });

    await deps.log({
      shop: request.shop,
      orderId: normalizedOrderId,
      customerId: order.customerId,
      email: order.email,
      activityId: config.activityId.toString(),
      eventType: ORDER_END_EVENT,
      eventId,
      status: "success",
      requestBody: pushResult.requestBody,
      responseBody: pushResult.responseBody,
    });

    return {
      success: true,
      redirectUrl: config.redirectUrl,
      buttonText,
    };
  } catch (error) {
    await safeLog(deps, failureLog(request.shop, order, config, eventId, toErrorMessage(error)));
    return { success: false };
  }
}

export function normalizeOrderId(orderId: string): string {
  if (orderId.startsWith("gid://shopify/Order/")) {
    return orderId;
  }

  return `gid://shopify/Order/${orderId.replace(/[^0-9]/g, "")}`;
}

export function extractLegacyId(orderId: string): string {
  return orderId.split("/").pop() || orderId;
}

function isActiveStatus(result: ThirdPartyResult<StatusResponse>, config: ActivityConfig): boolean {
  if (!result.httpOk || result.body.code !== (config.statusSuccessCode ?? 0)) {
    return false;
  }

  if (config.statusActiveRequired === false) {
    return true;
  }

  return result.body.data?.status === true;
}

function isSuccessfulPush(result: ThirdPartyResult<PushResponse>, config: ActivityConfig): boolean {
  return result.httpOk && result.body.code === (config.pushSuccessCode ?? 0);
}

function failureLog(
  shop: string,
  order: OrderDetails | undefined,
  config: ActivityConfig | undefined,
  eventId: string,
  errorMessage: string,
  requestBody?: string,
  responseBody?: string,
): LogEntry {
  return {
    shop,
    orderId: order?.id || "",
    customerId: order?.customerId,
    email: order?.email,
    activityId: config?.activityId.toString() || "",
    eventType: ORDER_END_EVENT,
    eventId,
    status: "fail",
    requestBody,
    responseBody,
    errorMessage,
  };
}

async function safeLog(deps: ActivityDeps, entry: LogEntry): Promise<void> {
  try {
    await deps.log(entry);
  } catch {
    // Logging must not break Thank You Page behavior.
  }
}

function toErrorMessage(error: unknown): string {
  return error instanceof Error ? error.message : String(error);
}