export interface BuildAssistantAddressOrchestrationRuntimeInput {
  userMessage: string;
  sessionItems: unknown[];
  llmProvider: unknown;
  useMock: boolean;
  featureAddressLlmPredecomposeV1: boolean;
  runAddressLlmPreDecompose: () => Promise<Record<string, unknown>>;
  buildAddressLlmPredecomposeContractV1: (input: {
    sourceMessage: string;
    canonicalMessage: string;
  }) => unknown;
  sanitizeAddressMessageForFallback: (userMessage: string) => string;
  toNonEmptyString: (value: unknown) => string | null;
  resolveAddressFollowupCarryoverContext: (
    userMessage: string,
    sessionItems: unknown[],
    addressInputMessage: string,
    addressPreDecompose: Record<string, unknown>
  ) => AssistantAddressCarryoverLike | null;
  resolveAssistantOrchestrationDecision: (input: {
    rawUserMessage: string;
    effectiveAddressUserMessage: string;
    followupContext: unknown;
    llmPreDecomposeMeta: Record<string, unknown>;
    sessionItems?: unknown[];
    useMock: boolean;
  }) => Record<string, unknown>;
  buildAddressDialogContinuationContractV2: (
    userMessage: string,
    addressInputMessage: string,
    carryover: AssistantAddressCarryoverLike | null,
    addressPreDecompose: Record<string, unknown>
  ) => unknown;
}

export interface AssistantAddressCarryoverLike {
  followupContext?: unknown;
  [key: string]: unknown;
}

export interface BuildAssistantAddressOrchestrationRuntimeOutput {
  addressPreDecompose: Record<string, unknown>;
  addressInputMessage: string;
  carryover: AssistantAddressCarryoverLike | null;
  orchestrationDecision: Record<string, unknown>;
  addressRuntimeMeta: Record<string, unknown>;
  livingModeDecision: {
    mode: unknown;
    reason: unknown;
  };
}

function hasSelectedObjectInventorySignal(text: string | null): boolean {
  return /(?:по\s+выбранному\s+объекту|по\s+этой\s+позиции|по\s+этому\s+товару|selected\s+object)/iu.test(
    String(text ?? "")
  );
}

function hasSelectedObjectInventoryActionCue(text: string | null): boolean {
  return /(?:кому[\s\S]{0,80}продал[аи]?|кому[\s\S]{0,80}реализова[нлт][а-я]*|кому\s+был\s+продан|кто[\s\S]{0,40}купил|кто\s+это\s+поставил|кто\s+поставил|у\s+кого\s+купили|у\s+кого\s+куплено|где\s+мы\s+купили|где\s+куплено|по\s+каким\s+документам|какими\s+документами|покажи\s+документы|документы\s+закупки|buyer|sale\s+trace|supplier|vendor|purchase\s+documents|purchase[\s-]?to[\s-]?sale|old\s+purchase|aged\s+stock)/iu.test(
    String(text ?? "")
  );
}

function isGenericCanonicalDriftIntent(intent: string | null): boolean {
  return (
    intent === "open_items_by_counterparty_or_contract" ||
    intent === "list_documents_by_counterparty" ||
    intent === "list_documents_by_contract" ||
    intent === "bank_operations_by_counterparty" ||
    intent === "bank_operations_by_contract" ||
    intent === "documents_forming_balance"
  );
}

function shouldPreferRawFollowupMessage(
  userMessage: string,
  addressInputMessage: string,
  carryover: AssistantAddressCarryoverLike | null,
  addressPreDecompose: Record<string, unknown>,
  toNonEmptyString: BuildAssistantAddressOrchestrationRuntimeInput["toNonEmptyString"]
): boolean {
  if (!carryover?.followupContext || typeof carryover.followupContext !== "object") {
    return false;
  }

  const rawMessage = toNonEmptyString(userMessage);
  const canonicalMessage = toNonEmptyString(addressInputMessage);
  if (!rawMessage || !canonicalMessage || rawMessage === canonicalMessage) {
    return false;
  }

  const predecomposeContract =
    addressPreDecompose?.predecomposeContract && typeof addressPreDecompose.predecomposeContract === "object"
      ? (addressPreDecompose.predecomposeContract as Record<string, unknown>)
      : null;
  const mode = toNonEmptyString(predecomposeContract?.mode) ?? "unknown";
  const intent = toNonEmptyString(predecomposeContract?.intent) ?? "unknown";

  if (mode === "unsupported" && intent === "unknown") {
    return true;
  }

  return (
    hasSelectedObjectInventorySignal(rawMessage) &&
    hasSelectedObjectInventoryActionCue(rawMessage) &&
    isGenericCanonicalDriftIntent(intent)
  );
}

function fallbackAddressPreDecompose(
  userMessage: string,
  llmProvider: unknown,
  buildAddressLlmPredecomposeContractV1: BuildAssistantAddressOrchestrationRuntimeInput["buildAddressLlmPredecomposeContractV1"],
  sanitizeAddressMessageForFallback: BuildAssistantAddressOrchestrationRuntimeInput["sanitizeAddressMessageForFallback"]
): Record<string, unknown> {
  const provider =
    llmProvider === "local" ? "local" : llmProvider === "openai" ? "openai" : null;
  return {
    attempted: false,
    applied: false,
    provider,
    traceId: null,
    effectiveMessage: userMessage,
    reason: "disabled_by_feature_flag",
    llmCanonicalCandidateDetected: false,
    predecomposeContract: buildAddressLlmPredecomposeContractV1({
      sourceMessage: userMessage,
      canonicalMessage: userMessage
    }),
    fallbackRuleHit: null,
    sanitizedUserMessage: sanitizeAddressMessageForFallback(userMessage),
    toolGateDecision: null,
    toolGateReason: null
  };
}

export async function buildAssistantAddressOrchestrationRuntime(
  input: BuildAssistantAddressOrchestrationRuntimeInput
): Promise<BuildAssistantAddressOrchestrationRuntimeOutput> {
  const initialAddressPreDecompose = input.featureAddressLlmPredecomposeV1
    ? await input.runAddressLlmPreDecompose()
    : fallbackAddressPreDecompose(
        input.userMessage,
        input.llmProvider,
        input.buildAddressLlmPredecomposeContractV1,
        input.sanitizeAddressMessageForFallback
      );

  let addressPreDecompose = initialAddressPreDecompose;
  let addressInputMessage =
    input.toNonEmptyString(addressPreDecompose?.effectiveMessage) ?? input.userMessage;
  let carryover = input.resolveAddressFollowupCarryoverContext(
    input.userMessage,
    input.sessionItems,
    addressInputMessage,
    addressPreDecompose
  );
  if (
    shouldPreferRawFollowupMessage(
      input.userMessage,
      addressInputMessage,
      carryover,
      addressPreDecompose,
      input.toNonEmptyString
    )
  ) {
    addressInputMessage = input.userMessage;
    addressPreDecompose = {
      ...addressPreDecompose,
      applied: false,
      effectiveMessage: input.userMessage,
      reason: "followup_raw_message_preferred_over_llm_rewrite",
      predecomposeContract: input.buildAddressLlmPredecomposeContractV1({
        sourceMessage: input.userMessage,
        canonicalMessage: input.userMessage
      })
    };
    carryover = input.resolveAddressFollowupCarryoverContext(
      input.userMessage,
      input.sessionItems,
      addressInputMessage,
      addressPreDecompose
    );
  }

  const followupContext = carryover?.followupContext ?? null;
  const orchestrationDecision = input.resolveAssistantOrchestrationDecision({
    rawUserMessage: input.userMessage,
    effectiveAddressUserMessage: addressInputMessage,
    followupContext,
    llmPreDecomposeMeta: addressPreDecompose,
    sessionItems: input.sessionItems,
    useMock: input.useMock
  });
  const dialogContinuationContract = input.buildAddressDialogContinuationContractV2(
    input.userMessage,
    addressInputMessage,
    carryover,
    addressPreDecompose
  );
  const addressRuntimeMeta = {
    ...addressPreDecompose,
    toolGateDecision: orchestrationDecision.toolGateDecision ?? null,
    toolGateReason: orchestrationDecision.toolGateReason ?? null,
    dialogContinuationContract,
    orchestrationContract: orchestrationDecision.orchestrationContract ?? null
  };
  const livingModeDecision = {
    mode: orchestrationDecision.livingMode,
    reason: orchestrationDecision.livingReason
  };

  return {
    addressPreDecompose,
    addressInputMessage,
    carryover,
    orchestrationDecision,
    addressRuntimeMeta,
    livingModeDecision
  };
}