"use client";

import { useState, useEffect } from "react";
import { Search } from "lucide-react";
import { Input } from "@/components/ui/input";
import Link from "next/link";
import { Button } from "@/components/ui/button";
import { useToast } from "@/components/ui/use-toast";

// Define Mission interface
interface User {
  id: string;
  email: string;
}

interface MissionUser {
  id: string;
  role: string;
  user: User;
}

interface Mission {
  id: string;
  name: string;
  logo?: string;
  logoUrl?: string;
  oddScope: string[];
  niveau: string;
  missionType: string;
  projection: string;
  participation?: string;
  services?: string[];
  intention?: string;
  createdAt: string;
  creator: User;
  missionUsers: MissionUser[];
}

export default function MissionTabPage() {
  const [searchTerm, setSearchTerm] = useState("");
  const [missions, setMissions] = useState<Mission[]>([]);
  const [loading, setLoading] = useState(true);
  const { toast } = useToast();
  
  // Fetch all missions from API
  useEffect(() => {
    const fetchAllMissions = async () => {
      try {
        setLoading(true);
        const response = await fetch('/api/missions/all');  // This will need a new API endpoint
        if (!response.ok) {
          throw new Error('Failed to fetch missions');
        }
        const data = await response.json();
        console.log("All missions data:", data.missions);
        setMissions(data.missions || []);
      } catch (error) {
        console.error('Error fetching missions:', error);
        toast({
          title: "Erreur",
          description: "Impossible de charger les missions",
          variant: "destructive",
        });
      } finally {
        setLoading(false);
      }
    };

    fetchAllMissions();
  }, []);
  
  // Filter missions based on search term
  const filteredMissions = missions.filter(mission => 
    mission.name.toLowerCase().includes(searchTerm.toLowerCase()) ||
    mission.niveau.toLowerCase().includes(searchTerm.toLowerCase()) ||
    mission.missionType.toLowerCase().includes(searchTerm.toLowerCase()) ||
    mission.oddScope.some(scope => scope.toLowerCase().includes(searchTerm.toLowerCase()))
  );
  
  // Function to format date
  const formatDate = (dateString: string) => {
    const date = new Date(dateString);
    return date.toLocaleDateString('fr-FR', {
      day: '2-digit',
      month: '2-digit',
      year: 'numeric'
    });
  };

  // Function to get mission category and icon
  const getODDInfo = (mission: Mission) => {
    const oddCode = mission.oddScope && mission.oddScope.length > 0 
      ? mission.oddScope[0] 
      : null;
    
    // Extract number from odd code (e.g., "odd-3" -> "3")
    const oddNumber = oddCode ? oddCode.replace('odd-', '') : null;
    
    return {
      number: oddNumber,
      label: oddNumber ? `ODD ${oddNumber}` : "Non catégorisé",
      iconPath: oddNumber ? `/F SDG Icons 2019 WEB/F-WEB-Goal-${oddNumber.padStart(2, '0')}.png` : ""
    };
  };

  // Function to get appropriate badge color based on niveau
  const getNiveauBadgeColor = (niveau: string) => {
    switch(niveau) {
      case 'a': return 'bg-green-100 text-green-800';
      case 'b': return 'bg-blue-100 text-blue-800';
      case 'c': return 'bg-purple-100 text-purple-800';
      case 's': return 'bg-amber-100 text-amber-800';
      default: return 'bg-gray-100 text-gray-800';
    }
  };

  // Function to get full niveau label
  const getNiveauLabel = (niveau: string) => {
    switch(niveau) {
      case 'a': return 'A';
      case 'b': return 'B';
      case 'c': return 'C';
      case 's': return 'S';
      default: return niveau.toUpperCase();
    }
  };
  
  return (
    <div className="flex flex-col h-[calc(100vh-64px)] w-full bg-white">
      {/* Page Title */}
      <div className="bg-white border-b border-gray-100 py-3 px-6">
        <h1 className="text-gray-800 text-xl font-bold">Le Tableau des Missions</h1>
      </div>

      {/* Search Header */}
      <div className="bg-white border-b border-gray-100 py-3 px-6">
        <div className="flex items-center justify-between">
          <h2 className="text-gray-800 text-base font-medium">Toutes les missions disponibles</h2>
          <div className="relative">
            <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-gray-500" />
            <Input
              placeholder="Rechercher une mission..."
              className="h-9 pl-9 pr-3 py-2 text-sm bg-white text-gray-800 border-gray-200 rounded-md w-60"
              value={searchTerm}
              onChange={(e) => setSearchTerm(e.target.value)}
            />
          </div>
        </div>
      </div>
      
      {/* Missions Grid */}
      <div className="flex-1 overflow-auto bg-gray-50 p-6">
        {loading ? (
          <div className="flex justify-center items-center h-40">
            <div className="animate-spin rounded-full h-10 w-10 border-t-2 border-b-2 border-blue-600"></div>
          </div>
        ) : filteredMissions.length > 0 ? (
          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
            {filteredMissions.map((mission) => {
              const oddInfo = getODDInfo(mission);
              const niveauColor = getNiveauBadgeColor(mission.niveau);
              
              return (
                <div key={mission.id} className="bg-white shadow-sm hover:shadow-md transition-shadow duration-200 border border-gray-200 overflow-hidden h-full rounded-lg flex flex-col">
                  {/* Card Header with Name and Level */}
                  <div className="px-5 pt-4 pb-3 flex justify-between items-center border-b border-gray-100">
                    <h2 className="text-base font-medium text-gray-900 line-clamp-2 flex-1">{mission.name}</h2>
                    <div className="flex items-center gap-2 ml-2">
                      {/* ODD scope icon */}
                      {oddInfo.number && (
                        <div className="flex items-center bg-gray-100 p-1 rounded-md">
                          <img 
                            src={oddInfo.iconPath} 
                            alt={oddInfo.label}
                            className="w-8 h-8" 
                            onError={(e) => {
                              // Fallback if image fails to load
                              (e.target as HTMLImageElement).style.display = 'none';
                            }}
                          />
                        </div>
                      )}
                      <span className={`flex-shrink-0 text-sm font-bold px-2.5 py-1.5 rounded-md ${niveauColor}`}>
                        {getNiveauLabel(mission.niveau)}
                      </span>
                    </div>
                  </div>
                  
                  {/* Centered Logo */}
                  <div className="flex justify-center items-center p-6 flex-grow">
                    <div className="w-48 h-48 relative">
                      {mission.logoUrl ? (
                        <img 
                          src={mission.logoUrl} 
                          alt={mission.name}
                          className="w-full h-full object-cover rounded-md"
                          onError={(e) => {
                            console.error("Logo failed to load:", {
                              missionId: mission.id,
                              missionName: mission.name,
                              logoUrl: mission.logoUrl,
                              logoPath: mission.logo
                            });
                            // If the image fails to load, show the fallback
                            (e.currentTarget as HTMLImageElement).style.display = 'none';
                            // Show the fallback div
                            const fallbackDiv = e.currentTarget.parentElement?.querySelector('.logo-fallback');
                            if (fallbackDiv) {
                              (fallbackDiv as HTMLElement).style.display = 'flex';
                            }
                          }}
                        />
                      ) : null}
                      <div 
                        className={`logo-fallback w-full h-full flex items-center justify-center bg-gray-100 rounded-md text-gray-500 text-4xl font-medium ${mission.logo ? 'hidden' : ''}`}
                      >
                        {mission.name.slice(0, 2).toUpperCase()}
                      </div>
                    </div>
                  </div>
                    
                  {/* Card Content - Services and Description */}
                  <div className="px-5 pb-3">
                    {/* Services section */}
                    {mission.services && mission.services.length > 0 && (
                      <div>
                        <span className="text-sm font-medium text-gray-700 block mb-1">Services:</span>
                        <div className="flex flex-wrap gap-1.5 mb-3">
                          {mission.services.map(service => (
                            <span key={service} className="bg-blue-50 text-blue-700 px-2 py-1 rounded-md text-xs font-medium">
                              {service}
                            </span>
                          ))}
                        </div>
                      </div>
                    )}
                    
                    {/* Description text */}
                    <div className="mt-2 text-sm text-gray-600 line-clamp-2">
                      {mission.intention ? 
                        (mission.intention.substring(0, 100) + (mission.intention.length > 100 ? '...' : '')) : 
                        'Pas de description disponible.'}
                    </div>
                  </div>
                    
                  {/* Card Footer */}
                  <div className="mt-auto px-5 py-3 border-t border-gray-100 bg-gray-50 flex justify-between items-center">
                    <span className="text-xs text-gray-500">
                      Créée le {formatDate(mission.createdAt)}
                    </span>
                    
                    <Link href={`/mission-tab/${mission.id}`}>
                      <Button className="bg-blue-600 hover:bg-blue-700 text-white text-xs px-3 py-1 h-7 rounded-md">
                        Voir détails
                      </Button>
                    </Link>
                  </div>
                </div>
              );
            })}
          </div>
        ) : (
          <div className="flex justify-center items-center h-40 bg-white rounded-lg shadow-sm border border-gray-200 p-6">
            <div className="text-center">
              <p className="text-gray-500 font-medium mb-2">Aucune mission trouvée</p>
              <p className="text-gray-400 text-sm">Modifiez vos critères de recherche ou réessayez plus tard.</p>
            </div>
          </div>
        )}
      </div>
    </div>
  );
}