"use client";

import { useState } from "react";
import { Button } from "@/components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogHeader,
  DialogTitle,
  DialogTrigger,
} from "@/components/ui/dialog";
import { Input } from "@/components/ui/input";
import { Plus, Search, Sparkles } from "lucide-react";
import { SkillCategory, CategoryEvaluation } from "@/lib/types";
import { TechIcon } from "./icons/tech-icon";
import { CreateSkillForm } from "./create-skill-form";

interface SkillSelectorProps {
  categories: SkillCategory[];
  evaluations: CategoryEvaluation[];
  selectedCategory: string;
  onAddSkill: (category: string, skillId: string) => void;
  onAddMultipleSkills?: (category: string, skillIds: string[]) => void;
  onRemoveSkill: (category: string, skillId: string) => void;
}

export function SkillSelector({
  categories,
  evaluations,
  selectedCategory,
  onAddSkill,
  onAddMultipleSkills,
  onRemoveSkill,
}: SkillSelectorProps) {
  const [isOpen, setIsOpen] = useState(false);
  const [isCreateOpen, setIsCreateOpen] = useState(false);
  const [searchTerm, setSearchTerm] = useState("");
  const [isAddingAll, setIsAddingAll] = useState(false);
  const [addingSkillIds, setAddingSkillIds] = useState<Set<string>>(new Set());

  const currentCategory = categories.find(
    (cat) => cat.category === selectedCategory
  );
  const currentEvaluation = evaluations.find(
    (evaluation) => evaluation.category === selectedCategory
  );

  if (!currentCategory) return null;

  const selectedSkillIds = currentEvaluation?.selectedSkillIds || [];

  const filteredSkills = currentCategory.skills.filter(
    (skill) =>
      skill.name.toLowerCase().includes(searchTerm.toLowerCase()) ||
      skill.description.toLowerCase().includes(searchTerm.toLowerCase())
  );

  const availableSkills = filteredSkills.filter(
    (skill) => !selectedSkillIds.includes(skill.id)
  );

  const selectedSkills = currentCategory.skills.filter((skill) =>
    selectedSkillIds.includes(skill.id)
  );

  const handleAddSkill = async (skillId: string) => {
    setAddingSkillIds((prev) => new Set(prev).add(skillId));
    try {
      await onAddSkill(selectedCategory, skillId);
    } catch (error) {
      console.error("Failed to add skill:", error);
    } finally {
      setAddingSkillIds((prev) => {
        const next = new Set(prev);
        next.delete(skillId);
        return next;
      });
    }
  };

  const handleAddAllSkills = async () => {
    setIsAddingAll(true);
    try {
      const skillIds = availableSkills.map((skill) => skill.id);

      // Utiliser la fonction d'ajout multiple si disponible, sinon fallback sur l'ajout individuel
      if (onAddMultipleSkills) {
        await onAddMultipleSkills(selectedCategory, skillIds);
      } else {
        // Fallback: ajouter en séquentiel pour éviter les conflits d'état
        for (const skill of availableSkills) {
          await onAddSkill(selectedCategory, skill.id);
        }
      }

      // Petit délai pour permettre à l'UI de se mettre à jour avant de fermer
      setTimeout(() => {
        setIsOpen(false);
      }, 100);
    } catch (error) {
      console.error("Failed to add all skills:", error);
    } finally {
      setIsAddingAll(false);
    }
  };

  return (
    <div className="space-y-4">
      {/* Selected Skills */}
      <div className="space-y-3">
        <div className="flex items-center justify-between">
          <h4 className="text-lg font-medium">Mes compétences sélectionnées</h4>
          <Dialog open={isOpen} onOpenChange={setIsOpen}>
            <DialogTrigger asChild>
              <Button
                size="sm"
                className="gap-2 bg-blue-500 hover:bg-blue-600 text-white shadow-lg"
              >
                <Plus className="h-4 w-4" />
                Ajouter une compétence
              </Button>
            </DialogTrigger>
            <DialogContent className="max-w-2xl">
              <DialogHeader>
                <DialogTitle>
                  Ajouter des compétences - {selectedCategory}
                </DialogTitle>
                <DialogDescription>
                  Choisissez les compétences que vous souhaitez évaluer dans
                  cette catégorie.
                </DialogDescription>
              </DialogHeader>

              <div className="space-y-4">
                {/* Search and Add All */}
                <div className="space-y-3">
                  <div className="relative">
                    <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-muted-foreground" />
                    <Input
                      placeholder="Rechercher une compétence..."
                      value={searchTerm}
                      onChange={(e) => setSearchTerm(e.target.value)}
                      className="pl-10"
                    />
                  </div>

                  {availableSkills.length > 1 && (
                    <Button
                      onClick={handleAddAllSkills}
                      disabled={isAddingAll}
                      className="w-full gap-2 bg-green-600 hover:bg-green-700 text-white disabled:opacity-50"
                    >
                      <Plus className="h-4 w-4" />
                      {isAddingAll
                        ? "Ajout en cours..."
                        : `Ajouter toutes les compétences (${availableSkills.length})`}
                    </Button>
                  )}
                </div>

                {/* Create New Skill Button */}
                <div className="border-t pt-4">
                  <Dialog open={isCreateOpen} onOpenChange={setIsCreateOpen}>
                    <DialogTrigger asChild>
                      <Button
                        variant="outline"
                        className="w-full gap-2 border-dashed border-2 border-blue-300/50 text-blue-200 hover:border-blue-400 hover:bg-blue-500/10 hover:text-blue-100 transition-all duration-200"
                      >
                        <Sparkles className="h-4 w-4" />
                        Créer une nouvelle compétence dans {selectedCategory}
                      </Button>
                    </DialogTrigger>
                    <DialogContent className="max-w-md">
                      <DialogHeader>
                        <DialogTitle>Créer une nouvelle compétence</DialogTitle>
                        <DialogDescription>
                          Ajoutez une compétence manquante dans la catégorie{" "}
                          {selectedCategory}
                        </DialogDescription>
                      </DialogHeader>
                      <CreateSkillForm
                        categoryName={selectedCategory}
                        onSuccess={(skillId) => {
                          setIsCreateOpen(false);
                          setIsOpen(false);
                          // Ajouter automatiquement la skill créée à l'évaluation
                          onAddSkill(selectedCategory, skillId);
                        }}
                        onCancel={() => setIsCreateOpen(false)}
                      />
                    </DialogContent>
                  </Dialog>
                </div>

                {/* Available Skills Grid */}
                <div className="max-h-96 overflow-y-auto">
                  <div className="grid gap-2">
                    {availableSkills.length > 0 ? (
                      availableSkills.map((skill) => (
                        <div
                          key={skill.id}
                          className="flex items-center justify-between p-3 border rounded-lg hover:bg-muted/30 transition-colors"
                        >
                          <div className="flex items-center gap-3">
                            <div className="w-8 h-8 rounded bg-muted flex items-center justify-center">
                              <TechIcon
                                iconName={skill.icon}
                                className="w-5 h-5 text-foreground"
                                fallbackText={skill.name}
                              />
                            </div>
                            <div>
                              <h5 className="font-medium">{skill.name}</h5>
                              <p className="text-sm text-muted-foreground line-clamp-1">
                                {skill.description}
                              </p>
                            </div>
                          </div>
                          <Button
                            size="sm"
                            onClick={() => handleAddSkill(skill.id)}
                            disabled={
                              addingSkillIds.has(skill.id) || isAddingAll
                            }
                            className="gap-2 disabled:opacity-50"
                          >
                            <Plus className="h-3 w-3" />
                            {addingSkillIds.has(skill.id)
                              ? "Ajout..."
                              : "Ajouter"}
                          </Button>
                        </div>
                      ))
                    ) : (
                      <div className="text-center py-8 text-muted-foreground">
                        {searchTerm
                          ? "Aucune compétence trouvée"
                          : "Toutes les compétences ont été ajoutées"}
                      </div>
                    )}
                  </div>
                </div>
              </div>
            </DialogContent>
          </Dialog>
        </div>

        {selectedSkills.length > 0 ? (
          <div className="bg-muted/30 rounded-lg p-4">
            <div className="flex items-center justify-between">
              <p className="text-sm text-muted-foreground">
                {selectedSkills.length} compétence
                {selectedSkills.length > 1 ? "s" : ""} sélectionnée
                {selectedSkills.length > 1 ? "s" : ""}
              </p>
              <div className="text-xs text-muted-foreground">
                Supprimez directement depuis les lignes ci-dessous
              </div>
            </div>
          </div>
        ) : (
          <div className="text-center py-8 text-muted-foreground border-2 border-dashed border-muted rounded-lg">
            <p className="mb-2">Aucune compétence sélectionnée</p>
            <p className="text-sm">
              Cliquez sur "Ajouter une compétence" pour commencer
            </p>
          </div>
        )}
      </div>
    </div>
  );
}