import { getEnv } from "@/lib/env";
import { getCcOwnerUserId, getCcProfileId } from "@/lib/cc-owner";
import { logger } from "@/lib/logger";
import { prisma } from "@/services/db";
import { ccAuth } from "@/services/cc/auth";
import { CcHttpClient, CcHttpError } from "@/services/cc/http";
import { normalizeCcCode } from "@/services/cc/code";
import {
  mockContainerExists,
  mockRegisterContainer,
} from "@/services/cc/mock-state";
import { isCcMock } from "@/services/cc/settings-config";
import { toShanghaiDateString } from "@/utils/dates";
import {
  classifyCcFailure,
  conflictCheckOperatorMessage,
  formatCcApiFailure,
  formatCcCause,
} from "@/constants/error-copy";
import { runWithListHttpGate } from "@/services/cc/list-http-gate";

const LIST_PATH = "/Container/GetContainerList";
const ccHttp = new CcHttpClient(ccAuth);

/** V1.73：GetContainerList 1 分钟 1 次；成功结果缓存，避免转仓闸门把限流当成失败 */
const LIST_CACHE_TTL_MS = 70_000;
const listCache = new Map<
  string,
  { at: number; result: { ok: true; items: CcContainerRow[] } }
>();
const listInflight = new Map<
  string,
  Promise<{ ok: true; items: CcContainerRow[] } | { ok: false; error: string }>
>();

function listProfileKey(): string {
  const profileId = getCcProfileId();
  if (profileId != null) return `profile:${profileId}`;
  const ownerUserId = getCcOwnerUserId();
  if (ownerUserId != null) return `owner:${ownerUserId}`;
  return "global";
}

function listCacheKey(profileKey: string, containerNo: string): string {
  return `${profileKey}:${containerNo}`;
}

export function isCcRateLimitedMessage(msg: string): boolean {
  return classifyCcFailure(msg) === "rate_limit";
}

export type ConflictCheckResult =
  | { ok: true }
  | {
      ok: false;
      code: "CONFLICT_CONTAINER";
      message: string;
      details?: Record<string, unknown>;
    }
  | {
      ok: false;
      code: "CONFLICT_CHECK_FAILED";
      message: string;
      details?: Record<string, unknown>;
    };

export interface ConflictCheckInput {
  mailId: bigint;
  containerNo: string;
  forceSkipConflict?: boolean;
  actor?: string;
}

interface CcContainerRow {
  F_ContainerNo?: string;
  F_Id?: string;
  F_ContainerTaskId?: string;
  F_CreateDate?: string;
  /** DO 文件夹 id */
  F_DOFile?: string | null;
}

function listDateRange(): { startTime: string; endTime: string } {
  const end = new Date();
  const start = new Date(end.getTime() - 30 * 24 * 60 * 60 * 1000);
  return {
    startTime: toShanghaiDateString(start) || "",
    endTime: toShanghaiDateString(end) || "",
  };
}

export async function getContainerListFromCc(
  containerNo: string,
): Promise<{ ok: true; items: CcContainerRow[] } | { ok: false; error: string }> {
  const normalized = containerNo.toUpperCase();
  const profileKey = listProfileKey();
  const cacheKey = listCacheKey(profileKey, normalized);

  if (await isCcMock()) {
    if (mockContainerExists(normalized)) {
      return {
        ok: true,
        items: [{ F_ContainerNo: normalized, F_Id: "mock-existing-id" }],
      };
    }
    return { ok: true, items: [] };
  }

  const cached = listCache.get(cacheKey);
  if (cached && Date.now() - cached.at < LIST_CACHE_TTL_MS) {
    return cached.result;
  }

  const pending = listInflight.get(cacheKey);
  if (pending) return pending;

  const { startTime, endTime } = listDateRange();
  // V1.72：data 内 queryJson 必须是 JSON **字符串**（非对象）；时间在 queryJson 内
  const queryPayload = {
    pagination: {
      rows: 50,
      page: 1,
      sidx: "F_CreateDate",
      sord: "desc",
    },
    queryJson: JSON.stringify({
      F_ContainerNo: normalized,
      F_CabinetType: "",
      F_TransMode: "",
      F_Status: "",
      F_FBAID: "",
      F_ShipmentId: "",
      StartTime: startTime,
      EndTime: endTime,
      F_FBACode: "",
    }),
  };

  const run = async (): Promise<
    { ok: true; items: CcContainerRow[] } | { ok: false; error: string }
  > => {
    try {
      const env = getEnv();
      const response = await runWithListHttpGate(profileKey, () =>
        ccHttp.request(LIST_PATH, queryPayload, {
          timeoutMs: env.CC_READ_TIMEOUT_MS,
        }),
      );
      const code = normalizeCcCode(response.code);
      if (code !== 200) {
        const error = formatCcApiFailure({
          api: "GetContainerList",
          code,
          info: response.info,
          fallback: `GetContainerList failed: ${code}`,
        });
        if (isCcRateLimitedMessage(String(response.info || error)) && cached?.result.ok) {
          return cached.result;
        }
        return { ok: false, error };
      }
      const items = parseContainerListRows(response.data);
      const okResult = { ok: true as const, items };
      listCache.set(cacheKey, { at: Date.now(), result: okResult });
      return okResult;
    } catch (err) {
      const msg =
        err instanceof CcHttpError
          ? err.timeout
            ? "GetContainerList timeout"
            : err.message
          : "GetContainerList failed";
      logger.error({ err, containerNo: normalized }, "cc.list_error");
      if (isCcRateLimitedMessage(msg) && cached?.result.ok) {
        return cached.result;
      }
      return { ok: false, error: formatCcCause(msg) };
    }
  };

  const promise = run().finally(() => {
    listInflight.delete(cacheKey);
  });
  listInflight.set(cacheKey, promise);
  return promise;
}

function parseContainerListRows(data: unknown): CcContainerRow[] {
  let parsed: unknown = data;
  if (typeof data === "string") {
    try {
      parsed = JSON.parse(data);
    } catch {
      return [];
    }
  }
  if (Array.isArray(parsed)) return parsed as CcContainerRow[];
  if (typeof parsed === "object" && parsed) {
    const obj = parsed as Record<string, unknown>;
    if (Array.isArray(obj.rows)) return obj.rows as CcContainerRow[];
    if (Array.isArray(obj.list)) return obj.list as CcContainerRow[];
  }
  return [];
}

async function checkLocalConflict(
  mailId: bigint,
  containerNo: string,
): Promise<ConflictCheckResult | null> {
  const normalized = containerNo.toUpperCase();

  const activeLock = await prisma.containerActiveLock.findUnique({
    where: { containerNo: normalized },
  });
  if (activeLock && activeLock.mailId !== mailId) {
    return {
      ok: false,
      code: "CONFLICT_CONTAINER",
      message: "该柜号正在被其他邮件导入",
      details: { mailId: activeLock.mailId.toString() },
    };
  }

  const otherSuccess = await prisma.containerImport.findFirst({
    where: {
      containerNo: normalized,
      status: "SUCCESS",
      mailId: { not: mailId },
    },
    include: { mail: { select: { id: true, subject: true, messageId: true } } },
  });
  if (otherSuccess) {
    return {
      ok: false,
      code: "CONFLICT_CONTAINER",
      message: "该柜号已在其他邮件中导入成功",
      details: {
        mailId: otherSuccess.mailId.toString(),
        subject: otherSuccess.mail.subject,
        messageId: otherSuccess.mail.messageId,
      },
    };
  }

  const sameMailSuccess = await prisma.containerImport.findFirst({
    where: {
      mailId,
      containerNo: normalized,
      status: "SUCCESS",
    },
  });
  if (sameMailSuccess) {
    return {
      ok: false,
      code: "CONFLICT_CONTAINER",
      message: "该柜已在本邮件中导入成功（幂等跳过）",
      details: { importId: sameMailSuccess.id.toString() },
    };
  }

  return null;
}

export async function checkContainerConflict(
  input: ConflictCheckInput,
): Promise<ConflictCheckResult> {
  const env = getEnv();
  const normalized = input.containerNo.toUpperCase();

  const local = await checkLocalConflict(input.mailId, normalized);
  if (local) return local;

  if (input.forceSkipConflict && env.ENABLE_FORCE_IMPORT) {
    logger.warn(
      { mailId: input.mailId.toString(), containerNo: normalized, actor: input.actor },
      "cc.conflict_force_skip",
    );
    return { ok: true };
  }

  const listResult = await getContainerListFromCc(normalized);
  if (!listResult.ok) {
    if (env.ENABLE_FORCE_IMPORT && input.forceSkipConflict) {
      return { ok: true };
    }
    const kind = classifyCcFailure(listResult.error);
    return {
      ok: false,
      code: "CONFLICT_CHECK_FAILED",
      message: conflictCheckOperatorMessage(kind, listResult.error),
      details: { kind, error: listResult.error },
    };
  }

  if (listResult.items.length > 0) {
    return {
      ok: false,
      code: "CONFLICT_CONTAINER",
      message: "该柜已在 CC 中存在，请确认",
      details: {
        items: listResult.items.map((i) => ({
          F_ContainerNo: i.F_ContainerNo,
          F_Id: i.F_Id,
        })),
      },
    };
  }

  return { ok: true };
}

export async function acquireContainerActiveLock(input: {
  containerNo: string;
  mailId: bigint;
  importId: bigint;
}): Promise<void> {
  const normalized = input.containerNo.toUpperCase();
  await prisma.containerActiveLock.upsert({
    where: { containerNo: normalized },
    create: {
      containerNo: normalized,
      mailId: input.mailId,
      importId: input.importId,
      lockedAt: new Date(),
    },
    update: {
      mailId: input.mailId,
      importId: input.importId,
      lockedAt: new Date(),
    },
  });
}

export async function releaseContainerActiveLock(containerNo: string): Promise<void> {
  const normalized = containerNo.toUpperCase();
  await prisma.containerActiveLock
    .delete({ where: { containerNo: normalized } })
    .catch(() => undefined);
}

/** Mock helper: register container after successful save in tests */
export async function mockMarkContainerExisting(containerNo: string): Promise<void> {
  if (await isCcMock()) {
    mockRegisterContainer(containerNo);
  }
}