"use client";

import React from "react";
import { Card, CardContent } from "@/components/ui/card";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Database, Filter, Zap, CheckCircle, XCircle, Edit } from "lucide-react";
import { DataConnectionState } from "../types/redesigned";

interface DataflowVisualizationProps {
  state: Partial<DataConnectionState> & {
    dataflowActions?: Array<{
      actionType: string;
      targetTable?: string;
      name?: string;
      fieldMappings?: any[];
    }>;
  };
  onEdit: (step: "source" | "conditions" | "actions") => void;
}

/**
 * 🎯 Sankey 다이어그램 스타일 데이터 흐름 시각화
 */
export const DataflowVisualization: React.FC<DataflowVisualizationProps> = ({ state, onEdit }) => {
  const { fromTable, toTable, controlConditions = [], dataflowActions = [], fromColumns = [], toColumns = [] } = state;

  // 상태 계산
  const hasSource = !!fromTable;
  const hasConditions = controlConditions.length > 0;
  const hasActions = dataflowActions.length > 0;
  const isComplete = hasSource && hasActions;

  // 필드명을 라벨명으로 변환하는 함수
  const getFieldLabel = (fieldName: string) => {
    // fromColumns와 toColumns에서 해당 필드 찾기
    const allColumns = [...fromColumns, ...toColumns];
    const column = allColumns.find((col) => col.columnName === fieldName);
    return column?.displayName || column?.labelKo || fieldName;
  };

  // 테이블명을 라벨명으로 변환하는 함수
  const getTableLabel = (tableName: string) => {
    // fromTable 또는 toTable의 라벨 반환
    if (fromTable?.tableName === tableName) {
      return fromTable?.tableLabel || fromTable?.displayName || tableName;
    }
    if (toTable?.tableName === tableName) {
      return toTable?.tableLabel || toTable?.displayName || tableName;
    }
    return tableName;
  };

  // 액션 그룹별로 대표 액션 1개씩만 표시
  const actionGroups = dataflowActions.reduce(
    (acc, action, index) => {
      // 각 액션을 개별 그룹으로 처리 (실제로는 actionGroups에서 온 것)
      const groupKey = `group_${index}`;
      acc[groupKey] = [action];
      return acc;
    },
    {} as Record<string, typeof dataflowActions>,
  );

  return (
    <div className="space-y-4 p-4 sm:space-y-6 sm:p-6">
      {/* 헤더 */}
      <div className="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between">
        <p className="text-xs sm:text-sm text-muted-foreground">전체 데이터 흐름을 한눈에 확인</p>
        <Badge variant={isComplete ? "default" : "secondary"} className="text-xs sm:text-sm w-fit">
          {isComplete ? "✅ 설정 완료" : "⚠️ 설정 필요"}
        </Badge>
      </div>

      {/* Sankey 다이어그램 */}
      <div className="relative flex flex-col items-center justify-center gap-6 py-8 sm:flex-row sm:gap-0 sm:py-12">
        {/* 연결선 레이어 */}
        <svg className="absolute inset-0 h-full w-full" style={{ zIndex: 0 }}>
          {/* 소스 → 조건 선 */}
          {hasSource && <line x1="25%" y1="50%" x2="50%" y2="50%" stroke="#60a5fa" strokeWidth="3" />}

          {/* 조건 → 액션들 선 (여러 개) */}
          {hasConditions &&
            hasActions &&
            Object.keys(actionGroups).map((groupKey, index) => {
              const totalActions = Object.keys(actionGroups).length;
              const startY = 50; // 조건 노드 중앙
              // 액션이 여러 개면 위에서 아래로 분산
              const endY =
                totalActions > 1
                  ? 30 + (index * 40) / (totalActions - 1) // 30%~70% 사이에 분산
                  : 50; // 액션이 1개면 중앙

              return (
                <line
                  key={groupKey}
                  x1="50%"
                  y1={`${startY}%`}
                  x2="75%"
                  y2={`${endY}%`}
                  stroke="#34d399"
                  strokeWidth="2"
                  opacity="0.7"
                />
              );
            })}
        </svg>

        <div className="relative flex w-full flex-col items-center justify-around gap-4 sm:flex-row sm:gap-0" style={{ zIndex: 1 }}>
          {/* 1. 소스 노드 */}
          <div className="flex flex-col items-center w-full sm:w-[28%]">
            <Card
              className={`w-full cursor-pointer border-2 transition-all hover:shadow-lg ${
                hasSource ? "border-primary bg-primary/10" : "border-border bg-muted"
              }`}
              onClick={() => onEdit("source")}
            >
              <CardContent>
                <div className="p-4">
                <div className="flex items-center justify-between">
                  <div className="flex-1">
                    <div className="mb-2 flex items-center gap-2">
                      <Database className="h-5 w-5 text-primary" />
                      <span className="text-sm font-semibold text-foreground">데이터 소스</span>
                    </div>
                    {hasSource ? (
                      <div className="space-y-1">
                        <p className="text-sm font-medium text-foreground">
                          {fromTable.tableLabel || fromTable.displayName || fromTable.tableName}
                        </p>
                        {(fromTable.tableLabel || fromTable.displayName) && (
                          <p className="text-xs text-muted-foreground">({fromTable.tableName})</p>
                        )}
                      </div>
                    ) : (
                      <p className="text-xs text-muted-foreground">미설정</p>
                    )}
                  </div>
                  <Button variant="ghost" size="sm" className="h-7 w-7 p-0">
                    <Edit className="h-3 w-3" />
                  </Button>
                </div>
                </div>
              </CardContent>
            </Card>
          </div>

          {/* 2. 조건 노드 (중앙) */}
          <div className="flex flex-col items-center w-full sm:w-[28%]">
            <Card
              className={`w-full cursor-pointer border-2 transition-all hover:shadow-lg ${
                hasConditions ? "border-warning bg-warning/10" : "border-border bg-muted"
              }`}
              onClick={() => onEdit("conditions")}
            >
              <CardContent>
                <div className="p-4">
                <div className="flex items-center justify-between">
                  <div className="flex-1">
                    <div className="mb-2 flex items-center gap-2">
                      <Filter className="h-5 w-5 text-warning" />
                      <span className="text-sm font-semibold text-foreground">조건 검증</span>
                    </div>
                    {hasConditions ? (
                      <div className="space-y-2">
                        {/* 실제 조건들 표시 */}
                        <div className="max-h-32 space-y-1 overflow-y-auto">
                          {controlConditions.slice(0, 3).map((condition, index) => (
                            <div key={index} className="rounded bg-background/50 px-2 py-1">
                              <p className="text-xs font-medium text-foreground">
                                {index > 0 && (
                                  <span className="mr-1 font-bold text-primary">
                                    {condition.logicalOperator || "AND"}
                                  </span>
                                )}
                                <span className="text-primary">{getFieldLabel(condition.field)}</span>{" "}
                                <span className="text-muted-foreground">{condition.operator}</span>{" "}
                                <span className="text-success">{condition.value}</span>
                              </p>
                            </div>
                          ))}
                          {controlConditions.length > 3 && (
                            <p className="px-2 text-xs text-muted-foreground">외 {controlConditions.length - 3}개...</p>
                          )}
                        </div>
                        <div className="mt-2 flex items-center justify-between border-t pt-2">
                          <div className="flex items-center gap-1">
                            <CheckCircle className="h-3 w-3 text-success" />
                            <span className="text-xs text-muted-foreground">충족 → 실행</span>
                          </div>
                          <div className="flex items-center gap-1">
                            <XCircle className="h-3 w-3 text-destructive" />
                            <span className="text-xs text-muted-foreground">불만족 → 중단</span>
                          </div>
                        </div>
                      </div>
                    ) : (
                      <p className="text-xs text-muted-foreground">조건 없음 (항상 실행)</p>
                    )}
                  </div>
                  <Button variant="ghost" size="sm" className="h-7 w-7 p-0">
                    <Edit className="h-3 w-3" />
                  </Button>
                </div>
                </div>
              </CardContent>
            </Card>
          </div>

          {/* 3. 액션 노드들 (우측) */}
          <div className="flex flex-col items-center gap-3 w-full sm:w-[28%]">
            <Button
              variant="ghost"
              size="sm"
              onClick={() => onEdit("actions")}
              className="mb-2 flex items-center gap-2 self-end"
            >
              <Edit className="h-3 w-3" />
              <span className="text-xs">전체 편집</span>
            </Button>

            {hasActions ? (
              <div className="w-full space-y-3">
                {Object.entries(actionGroups).map(([groupKey, actions]) => (
                  <ActionFlowCard
                    key={groupKey}
                    type={actions[0].actionType}
                    actions={actions}
                    getTableLabel={getTableLabel}
                  />
                ))}
              </div>
            ) : (
              <Card className="w-full border-2 border-dashed border-border bg-muted">
                <CardContent>
                  <div className="p-4 text-center">
                  <Zap className="mx-auto mb-2 h-6 w-6 text-muted-foreground" />
                  <p className="text-xs text-muted-foreground">액션 미설정</p>
                  </div>
                </CardContent>
              </Card>
            )}
          </div>
        </div>

        {/* 조건 불만족 시 중단 표시 (하단) */}
        {hasConditions && (
          <div
            className="absolute bottom-0 flex items-center gap-2 rounded-lg border-2 border-destructive/30 bg-destructive/10 px-3 py-2"
            style={{ left: "50%", transform: "translateX(-50%)" }}
          >
            <XCircle className="h-4 w-4 text-destructive" />
            <span className="text-xs font-medium text-destructive">조건 불만족 → 실행 중단</span>
          </div>
        )}
      </div>

      {/* 통계 요약 */}
      <Card className="border-border bg-gradient-to-r from-muted to-muted/50">
        <CardContent>
          <div className="p-4">
          <div className="flex flex-col items-center justify-around gap-4 text-center sm:flex-row sm:gap-0">
            <div>
              <p className="text-xs text-muted-foreground">소스</p>
              <p className="text-base font-bold text-primary sm:text-lg">{hasSource ? 1 : 0}</p>
            </div>
            <div className="h-8 w-px bg-border hidden sm:block"></div>
            <div>
              <p className="text-xs text-muted-foreground">조건</p>
              <p className="text-base font-bold text-warning sm:text-lg">{controlConditions.length}</p>
            </div>
            <div className="h-8 w-px bg-border hidden sm:block"></div>
            <div>
              <p className="text-xs text-muted-foreground">액션</p>
              <p className="text-base font-bold text-success sm:text-lg">{dataflowActions.length}</p>
            </div>
          </div>
          </div>
        </CardContent>
      </Card>
    </div>
  );
};

// 액션 플로우 카드 컴포넌트
interface ActionFlowCardProps {
  type: string;
  actions: Array<{
    actionType: string;
    targetTable?: string;
    name?: string;
    fieldMappings?: any[];
  }>;
  getTableLabel: (tableName: string) => string;
}

const ActionFlowCard: React.FC<ActionFlowCardProps> = ({ type, actions, getTableLabel }) => {
  const actionColors = {
    insert: { bg: "bg-primary/10", border: "border-primary/30", text: "text-primary", icon: "text-primary" },
    update: { bg: "bg-success/10", border: "border-success/30", text: "text-success", icon: "text-success" },
    delete: { bg: "bg-destructive/10", border: "border-destructive/30", text: "text-destructive", icon: "text-destructive" },
    upsert: { bg: "bg-primary/10", border: "border-primary/30", text: "text-primary", icon: "text-primary" },
  };

  const colors = actionColors[type as keyof typeof actionColors] || actionColors.insert;
  const action = actions[0]; // 그룹당 1개만 표시
  const displayName = action.targetTable ? getTableLabel(action.targetTable) : action.name || "액션";
  const isTableLabel = action.targetTable && getTableLabel(action.targetTable) !== action.targetTable;

  return (
    <Card className={`border-2 ${colors.border} ${colors.bg}`}>
      <CardContent>
        <div className="p-3">
        <div className="mb-2 flex items-center gap-2">
          <Zap className={`h-4 w-4 ${colors.icon}`} />
          <span className={`text-sm font-semibold ${colors.text}`}>{type.toUpperCase()}</span>
        </div>
        <div className="flex flex-col gap-0.5">
          <div className="flex items-center gap-2 text-xs">
            <Database className="h-3 w-3 text-muted-foreground" />
            <span className="truncate font-medium text-foreground">{displayName}</span>
          </div>
          {isTableLabel && action.targetTable && (
            <span className="ml-5 truncate text-xs text-muted-foreground">({action.targetTable})</span>
          )}
        </div>
        </div>
      </CardContent>
    </Card>
  );
};