"use client";

import { useState, useCallback } from "react";
import { ConditionNode } from "@/lib/api/dataflow";
import {
  generateConditionId,
  generateGroupId,
  generateActionGroupId,
  findOpenGroups,
  getNextGroupLevel,
  getCurrentGroupLevel,
} from "@/utils/connectionUtils";
import toast from "react-hot-toast";

export const useConditionManager = () => {
  const [conditions, setConditions] = useState<ConditionNode[]>([]);

  // 조건 추가
  const addCondition = useCallback(() => {
    const newCondition: ConditionNode = {
      id: generateConditionId(),
      type: "condition" as const,
      field: "",
      operator: "=",
      value: "",
      dataType: "string",
      // 첫 번째 조건이 아니고, 바로 앞이 group-start가 아니면 logicalOperator 추가
      ...(conditions.length > 0 &&
        conditions[conditions.length - 1]?.type !== "group-start" && { logicalOperator: "AND" as const }),
    };

    setConditions([...conditions, newCondition]);
  }, [conditions]);

  // 그룹 시작 추가
  const addGroupStart = useCallback(() => {
    const groupId = generateGroupId();
    const groupLevel = getNextGroupLevel(conditions);

    const groupStart: ConditionNode = {
      id: generateConditionId(),
      type: "group-start" as const,
      groupId,
      groupLevel,
      // 첫 번째 그룹이 아니면 logicalOperator 추가
      ...(conditions.length > 0 && { logicalOperator: "AND" as const }),
    };

    setConditions([...conditions, groupStart]);
  }, [conditions]);

  // 그룹 끝 추가
  const addGroupEnd = useCallback(() => {
    // 가장 최근에 열린 그룹 찾기
    const openGroups = findOpenGroups(conditions);
    if (openGroups.length === 0) {
      toast.error("닫을 그룹이 없습니다.");
      return;
    }

    const lastOpenGroup = openGroups[openGroups.length - 1];
    const groupEnd: ConditionNode = {
      id: generateConditionId(),
      type: "group-end" as const,
      groupId: lastOpenGroup.groupId,
      groupLevel: lastOpenGroup.groupLevel,
    };

    setConditions([...conditions, groupEnd]);
  }, [conditions]);

  // 조건 업데이트
  const updateCondition = useCallback(
    (index: number, field: keyof ConditionNode, value: string) => {
      const updatedConditions = [...conditions];
      updatedConditions[index] = { ...updatedConditions[index], [field]: value };
      setConditions(updatedConditions);
    },
    [conditions],
  );

  // 조건 제거
  const removeCondition = useCallback(
    (index: number) => {
      const conditionToRemove = conditions[index];

      // 그룹 시작/끝을 삭제하는 경우 해당 그룹 전체 삭제
      if (conditionToRemove.type === "group-start" || conditionToRemove.type === "group-end") {
        const updatedConditions = conditions.filter((c) => c.groupId !== conditionToRemove.groupId);
        setConditions(updatedConditions);
      } else {
        const updatedConditions = conditions.filter((_, i) => i !== index);
        setConditions(updatedConditions);
      }
    },
    [conditions],
  );

  // 그룹 전체 삭제
  const removeGroup = useCallback(
    (groupId: string) => {
      const updatedConditions = conditions.filter((c) => c.groupId !== groupId);
      setConditions(updatedConditions);
    },
    [conditions],
  );

  return {
    conditions,
    setConditions,
    addCondition,
    addGroupStart,
    addGroupEnd,
    updateCondition,
    removeCondition,
    removeGroup,
    getCurrentGroupLevel: (conditionIndex: number) => getCurrentGroupLevel(conditions, conditionIndex),
  };
};

// 액션별 조건 관리를 위한 헬퍼 함수들
export const useActionConditionHelpers = () => {
  // 액션별 그룹 시작 추가
  const addActionGroupStart = useCallback(
    (actionIndex: number, dataSaveSettings: any, setDataSaveSettings: (settings: any) => void) => {
      const groupId = generateActionGroupId();
      const currentConditions = dataSaveSettings.actions[actionIndex].conditions || [];
      const groupLevel = getNextGroupLevel(currentConditions);

      const groupStart: ConditionNode = {
        id: generateConditionId(),
        type: "group-start" as const,
        groupId,
        groupLevel,
        // 첫 번째 그룹이 아니면 logicalOperator 추가
        ...(currentConditions.length > 0 && { logicalOperator: "AND" as const }),
      };

      const newActions = [...dataSaveSettings.actions];
      newActions[actionIndex].conditions = [...currentConditions, groupStart];
      setDataSaveSettings({ ...dataSaveSettings, actions: newActions });
    },
    [],
  );

  // 액션별 그룹 끝 추가
  const addActionGroupEnd = useCallback(
    (actionIndex: number, dataSaveSettings: any, setDataSaveSettings: (settings: any) => void) => {
      const currentConditions = dataSaveSettings.actions[actionIndex].conditions || [];
      const openGroups = findOpenGroups(currentConditions);

      if (openGroups.length === 0) {
        toast.error("닫을 그룹이 없습니다.");
        return;
      }

      const lastOpenGroup = openGroups[openGroups.length - 1];
      const groupEnd: ConditionNode = {
        id: generateConditionId(),
        type: "group-end" as const,
        groupId: lastOpenGroup.groupId,
        groupLevel: lastOpenGroup.groupLevel,
      };

      const newActions = [...dataSaveSettings.actions];
      newActions[actionIndex].conditions = [...currentConditions, groupEnd];
      setDataSaveSettings({ ...dataSaveSettings, actions: newActions });
    },
    [],
  );

  // 액션별 현재 조건의 그룹 레벨 계산
  const getActionCurrentGroupLevel = useCallback((conditions: ConditionNode[], conditionIndex: number): number => {
    return getCurrentGroupLevel(conditions, conditionIndex);
  }, []);

  return {
    addActionGroupStart,
    addActionGroupEnd,
    getActionCurrentGroupLevel,
  };
};