"use client";

import React, { useState, useEffect } from "react";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Badge } from "@/components/ui/badge";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import { 
  Plus, 
  Search, 
  MoreHorizontal, 
  Edit, 
  Trash2, 
  Play, 
  History,
  RefreshCw 
} from "lucide-react";
import { toast } from "sonner";
import { showErrorToast } from "@/lib/utils/toastUtils";
import { CollectionAPI, DataCollectionConfig } from "@/lib/api/collection";
import CollectionConfigModal from "@/components/admin/CollectionConfigModal";

export default function CollectionManagementPage() {
  const [configs, setConfigs] = useState<DataCollectionConfig[]>([]);
  const [filteredConfigs, setFilteredConfigs] = useState<DataCollectionConfig[]>([]);
  const [isLoading, setIsLoading] = useState(false);
  const [searchTerm, setSearchTerm] = useState("");
  const [statusFilter, setStatusFilter] = useState("all");
  const [typeFilter, setTypeFilter] = useState("all");
  
  // 모달 상태
  const [isModalOpen, setIsModalOpen] = useState(false);
  const [selectedConfig, setSelectedConfig] = useState<DataCollectionConfig | null>(null);

  const collectionTypeOptions = CollectionAPI.getCollectionTypeOptions();

  useEffect(() => {
    loadConfigs();
  }, []);

  useEffect(() => {
    filterConfigs();
  }, [configs, searchTerm, statusFilter, typeFilter]);

  const loadConfigs = async () => {
    setIsLoading(true);
    try {
      const data = await CollectionAPI.getCollectionConfigs();
      setConfigs(data);
    } catch (error) {
      console.error("수집 설정 목록 조회 오류:", error);
      showErrorToast("수집 설정 목록을 불러오는 데 실패했습니다", error, { guidance: "네트워크 연결을 확인해 주세요." });
    } finally {
      setIsLoading(false);
    }
  };

  const filterConfigs = () => {
    let filtered = configs;

    // 검색어 필터
    if (searchTerm) {
      filtered = filtered.filter(config =>
        config.config_name.toLowerCase().includes(searchTerm.toLowerCase()) ||
        config.source_table.toLowerCase().includes(searchTerm.toLowerCase()) ||
        config.description?.toLowerCase().includes(searchTerm.toLowerCase())
      );
    }

    // 상태 필터
    if (statusFilter !== "all") {
      filtered = filtered.filter(config => config.is_active === statusFilter);
    }

    // 타입 필터
    if (typeFilter !== "all") {
      filtered = filtered.filter(config => config.collection_type === typeFilter);
    }

    setFilteredConfigs(filtered);
  };

  const handleCreate = () => {
    setSelectedConfig(null);
    setIsModalOpen(true);
  };

  const handleEdit = (config: DataCollectionConfig) => {
    setSelectedConfig(config);
    setIsModalOpen(true);
  };

  const handleDelete = async (config: DataCollectionConfig) => {
    if (!confirm(`"${config.config_name}" 수집 설정을 삭제하시겠습니까?`)) {
      return;
    }

    try {
      await CollectionAPI.deleteCollectionConfig(config.id!);
      toast.success("수집 설정이 삭제되었습니다.");
      loadConfigs();
    } catch (error) {
      console.error("수집 설정 삭제 오류:", error);
      toast.error("수집 설정 삭제에 실패했습니다.");
    }
  };

  const handleExecute = async (config: DataCollectionConfig) => {
    try {
      await CollectionAPI.executeCollection(config.id!);
      toast.success(`"${config.config_name}" 수집 작업을 시작했습니다.`);
    } catch (error) {
      console.error("수집 작업 실행 오류:", error);
      showErrorToast("수집 작업 실행에 실패했습니다", error, { guidance: "수집 설정을 확인해 주세요." });
    }
  };

  const handleModalSave = () => {
    loadConfigs();
  };

  const getStatusBadge = (isActive: string) => {
    return isActive === "Y" ? (
      <Badge className="bg-emerald-100 text-emerald-800">활성</Badge>
    ) : (
      <Badge className="bg-destructive/10 text-red-800">비활성</Badge>
    );
  };

  const getTypeBadge = (type: string) => {
    const option = collectionTypeOptions.find(opt => opt.value === type);
    const colors = {
      full: "bg-primary/10 text-primary",
      incremental: "bg-purple-100 text-purple-800",
      delta: "bg-amber-100 text-orange-800",
    };
    return (
      <Badge className={colors[type as keyof typeof colors] || "bg-muted text-foreground"}>
        {option?.label || type}
      </Badge>
    );
  };

  return (
    <div className="min-h-screen bg-muted">
      <div className="w-full max-w-none px-4 py-8 space-y-8">
        {/* 헤더 */}
        <div className="flex items-center justify-between">
          <div>
            <h1 className="text-2xl font-bold">수집 관리</h1>
          <p className="text-muted-foreground">
            외부 데이터베이스에서 데이터를 수집하는 설정을 관리합니다.
          </p>
        </div>
        <Button onClick={handleCreate}>
          <Plus className="h-4 w-4 mr-2" />
          새 수집 설정
        </Button>
      </div>

      {/* 필터 및 검색 */}
      <Card>
        <CardHeader>
          <CardTitle>필터 및 검색</CardTitle>
        </CardHeader>
        <CardContent>
          <div className="flex flex-col md:flex-row gap-4">
            <div className="flex-1">
              <div className="relative">
                <Search className="absolute left-3 top-3 h-4 w-4 text-muted-foreground" />
                <Input
                  placeholder="설정명, 테이블명, 설명으로 검색..."
                  value={searchTerm}
                  onChange={(e) => setSearchTerm(e.target.value)}
                  className="pl-10"
                />
              </div>
            </div>
            
            <Select value={statusFilter} onValueChange={setStatusFilter}>
              <SelectTrigger className="w-32">
                <SelectValue placeholder="상태" />
              </SelectTrigger>
              <SelectContent>
                <SelectItem value="all">전체</SelectItem>
                <SelectItem value="Y">활성</SelectItem>
                <SelectItem value="N">비활성</SelectItem>
              </SelectContent>
            </Select>

            <Select value={typeFilter} onValueChange={setTypeFilter}>
              <SelectTrigger className="w-40">
                <SelectValue placeholder="수집 타입" />
              </SelectTrigger>
              <SelectContent>
                <SelectItem value="all">전체 타입</SelectItem>
                {collectionTypeOptions.map((option) => (
                  <SelectItem key={option.value} value={option.value}>
                    {option.label}
                  </SelectItem>
                ))}
              </SelectContent>
            </Select>

            <Button variant="outline" onClick={loadConfigs} disabled={isLoading}>
              <RefreshCw className={`h-4 w-4 mr-2 ${isLoading ? 'animate-spin' : ''}`} />
              새로고침
            </Button>
          </div>
        </CardContent>
      </Card>

      {/* 수집 설정 목록 */}
      <Card>
        <CardHeader>
          <CardTitle>수집 설정 목록 ({filteredConfigs.length}개)</CardTitle>
        </CardHeader>
        <CardContent>
          {isLoading ? (
            <div className="text-center py-8">
              <RefreshCw className="h-8 w-8 animate-spin mx-auto mb-2" />
              <p>수집 설정을 불러오는 중...</p>
            </div>
          ) : filteredConfigs.length === 0 ? (
            <div className="text-center py-8 text-muted-foreground">
              {configs.length === 0 ? "수집 설정이 없습니다." : "검색 결과가 없습니다."}
            </div>
          ) : (
            <Table>
              <TableHeader>
                <TableRow>
                  <TableHead className="h-12 px-6 py-3 text-sm font-semibold">설정명</TableHead>
                  <TableHead className="h-12 px-6 py-3 text-sm font-semibold">수집 타입</TableHead>
                  <TableHead className="h-12 px-6 py-3 text-sm font-semibold">소스 테이블</TableHead>
                  <TableHead className="h-12 px-6 py-3 text-sm font-semibold">대상 테이블</TableHead>
                  <TableHead className="h-12 px-6 py-3 text-sm font-semibold">스케줄</TableHead>
                  <TableHead className="h-12 px-6 py-3 text-sm font-semibold">상태</TableHead>
                  <TableHead className="h-12 px-6 py-3 text-sm font-semibold">마지막 수집</TableHead>
                  <TableHead className="h-12 px-6 py-3 text-sm font-semibold">작업</TableHead>
                </TableRow>
              </TableHeader>
              <TableBody>
                {filteredConfigs.map((config) => (
                  <TableRow key={config.id} className="bg-background transition-colors hover:bg-muted/50">
                    <TableCell className="h-16 px-6 py-3 text-sm">
                      <div>
                        <div className="font-medium">{config.config_name}</div>
                        {config.description && (
                          <div className="text-sm text-muted-foreground">
                            {config.description}
                          </div>
                        )}
                      </div>
                    </TableCell>
                    <TableCell className="h-16 px-6 py-3 text-sm">
                      {getTypeBadge(config.collection_type)}
                    </TableCell>
                    <TableCell className="h-16 px-6 py-3 font-mono text-sm">
                      {config.source_table}
                    </TableCell>
                    <TableCell className="h-16 px-6 py-3 font-mono text-sm">
                      {config.target_table || "-"}
                    </TableCell>
                    <TableCell className="h-16 px-6 py-3 font-mono text-sm">
                      {config.schedule_cron || "-"}
                    </TableCell>
                    <TableCell className="h-16 px-6 py-3 text-sm">
                      {getStatusBadge(config.is_active)}
                    </TableCell>
                    <TableCell className="h-16 px-6 py-3 text-sm">
                      {config.last_collected_at
                        ? new Date(config.last_collected_at).toLocaleString()
                        : "-"}
                    </TableCell>
                    <TableCell className="h-16 px-6 py-3 text-sm">
                      <DropdownMenu>
                        <DropdownMenuTrigger asChild>
                          <Button variant="ghost" className="h-8 w-8 p-0">
                            <MoreHorizontal className="h-4 w-4" />
                          </Button>
                        </DropdownMenuTrigger>
                        <DropdownMenuContent align="end">
                          <DropdownMenuItem onClick={() => handleEdit(config)}>
                            <Edit className="h-4 w-4 mr-2" />
                            수정
                          </DropdownMenuItem>
                          <DropdownMenuItem 
                            onClick={() => handleExecute(config)}
                            disabled={config.is_active !== "Y"}
                          >
                            <Play className="h-4 w-4 mr-2" />
                            실행
                          </DropdownMenuItem>
                          <DropdownMenuItem onClick={() => handleDelete(config)}>
                            <Trash2 className="h-4 w-4 mr-2" />
                            삭제
                          </DropdownMenuItem>
                        </DropdownMenuContent>
                      </DropdownMenu>
                    </TableCell>
                  </TableRow>
                ))}
              </TableBody>
            </Table>
          )}
        </CardContent>
      </Card>

      {/* 수집 설정 모달 */}
      <CollectionConfigModal
        isOpen={isModalOpen}
        onClose={() => setIsModalOpen(false)}
        onSave={handleModalSave}
        config={selectedConfig}
      />
      </div>
    </div>
  );
}
