import { OnboardingData } from "@/pages/Onboarding";
import { Button } from "@/components/ui/button";
import { Label } from "@/components/ui/label";
import { Textarea } from "@/components/ui/textarea";
import { Badge } from "@/components/ui/badge";
import { ArrowLeft, ArrowRight, Plus, X } from "lucide-react";
import { useState } from "react";

interface ExperienceProps {
  data: OnboardingData;
  updateData: (data: Partial<OnboardingData>) => void;
  nextStep: () => void;
  prevStep: () => void;
}

const experienceLevels = [
  { id: 'beginner', label: 'Beginner', description: 'New to the field' },
  { id: 'intermediate', label: 'Intermediate', description: '1-3 years experience' },
  { id: 'advanced', label: 'Advanced', description: '3-7 years experience' },
  { id: 'expert', label: 'Expert', description: '7+ years experience' },
];

const skillSuggestions = {
  'game-developer': [
    'Unity', 'Unreal Engine', 'C#', 'C++', 'JavaScript', 'Python', 'Blender', '3D Modeling',
    'Game Design', 'Level Design', 'Animation', 'Shader Programming', 'Roblox Development'
  ],
  'client': [
    'Project Management', 'Business Strategy', 'Product Development', 'Marketing',
    'Team Leadership', 'Budget Management', 'Quality Assurance', 'User Experience'
  ],
  'member': [
    'Research', 'Innovation', 'Technology Trends', 'Community Building', 'Networking',
    'Content Creation', 'Documentation', 'Knowledge Sharing'
  ],
  'customer': [
    'Gaming', 'Technology Adoption', 'User Feedback', 'Beta Testing', 'Community Participation',
    'Content Consumption', 'Product Evaluation'
  ]
};

export default function Experience({ data, updateData, nextStep, prevStep }: ExperienceProps) {
  const [newSkill, setNewSkill] = useState('');

  const handleLevelChange = (level: string) => {
    updateData({
      experience: {
        ...data.experience,
        level
      }
    });
  };

  const handleSkillAdd = (skill: string) => {
    if (skill && !data.experience.skills.includes(skill)) {
      updateData({
        experience: {
          ...data.experience,
          skills: [...data.experience.skills, skill]
        }
      });
    }
    setNewSkill('');
  };

  const handleSkillRemove = (skillToRemove: string) => {
    updateData({
      experience: {
        ...data.experience,
        skills: data.experience.skills.filter(skill => skill !== skillToRemove)
      }
    });
  };

  const handleProjectsChange = (projects: string) => {
    updateData({
      experience: {
        ...data.experience,
        previousProjects: projects
      }
    });
  };

  const isValid = data.experience.level && data.experience.skills.length > 0;
  const suggestions = data.userType ? skillSuggestions[data.userType] || [] : [];

  return (
    <div className="space-y-6">
      <div className="text-center space-y-2">
        <p className="text-muted-foreground">
          Help us understand your background and expertise
        </p>
      </div>

      <div className="max-w-2xl mx-auto space-y-6">
        {/* Experience Level */}
        <div className="space-y-3">
          <Label className="text-sm font-medium">Experience Level *</Label>
          <div className="grid grid-cols-1 sm:grid-cols-2 gap-3">
            {experienceLevels.map((level) => (
              <button
                key={level.id}
                onClick={() => handleLevelChange(level.id)}
                className={`p-4 rounded-lg border-2 text-left transition-all duration-200 ${
                  data.experience.level === level.id
                    ? 'border-aethex-500 bg-aethex-500/10 glow-purple'
                    : 'border-border/50 hover:border-aethex-400/50 bg-background/50'
                }`}
              >
                <div className="font-medium">{level.label}</div>
                <div className="text-sm text-muted-foreground">{level.description}</div>
              </button>
            ))}
          </div>
        </div>

        {/* Skills */}
        <div className="space-y-3">
          <Label className="text-sm font-medium">Skills & Technologies *</Label>
          
          {/* Current Skills */}
          {data.experience.skills.length > 0 && (
            <div className="flex flex-wrap gap-2">
              {data.experience.skills.map((skill) => (
                <Badge
                  key={skill}
                  variant="secondary"
                  className="bg-aethex-500/20 text-aethex-300 border-aethex-500/30 hover:bg-aethex-500/30"
                >
                  {skill}
                  <X
                    className="h-3 w-3 ml-1 cursor-pointer hover:text-destructive"
                    onClick={() => handleSkillRemove(skill)}
                  />
                </Badge>
              ))}
            </div>
          )}

          {/* Add Custom Skill */}
          <div className="flex gap-2">
            <input
              type="text"
              value={newSkill}
              onChange={(e) => setNewSkill(e.target.value)}
              placeholder="Add a skill..."
              className="flex-1 px-3 py-2 text-sm rounded-md border border-border/50 bg-background/50 focus:border-aethex-400 focus:outline-none"
              onKeyPress={(e) => e.key === 'Enter' && handleSkillAdd(newSkill)}
            />
            <Button
              size="sm"
              onClick={() => handleSkillAdd(newSkill)}
              disabled={!newSkill.trim()}
              className="bg-gradient-to-r from-aethex-500 to-neon-blue"
            >
              <Plus className="h-4 w-4" />
            </Button>
          </div>

          {/* Skill Suggestions */}
          {suggestions.length > 0 && (
            <div className="space-y-2">
              <Label className="text-xs text-muted-foreground">Suggested skills:</Label>
              <div className="flex flex-wrap gap-2">
                {suggestions
                  .filter(skill => !data.experience.skills.includes(skill))
                  .slice(0, 8)
                  .map((skill) => (
                    <button
                      key={skill}
                      onClick={() => handleSkillAdd(skill)}
                      className="px-3 py-1 text-xs rounded-full border border-border/50 hover:border-aethex-400/50 hover:bg-aethex-500/10 transition-all duration-200"
                    >
                      {skill}
                    </button>
                  ))}
              </div>
            </div>
          )}
        </div>

        {/* Previous Projects (optional for some user types) */}
        {(data.userType === 'game-developer' || data.userType === 'client') && (
          <div className="space-y-2">
            <Label htmlFor="projects" className="text-sm font-medium">
              Previous Projects or Experience
              <span className="text-muted-foreground"> (optional)</span>
            </Label>
            <Textarea
              id="projects"
              value={data.experience.previousProjects || ''}
              onChange={(e) => handleProjectsChange(e.target.value)}
              placeholder="Tell us about your previous projects, experiences, or achievements..."
              className="bg-background/50 border-border/50 focus:border-aethex-400 min-h-[100px]"
            />
          </div>
        )}
      </div>

      <div className="flex justify-between pt-6">
        <Button 
          variant="outline" 
          onClick={prevStep}
          className="flex items-center space-x-2"
        >
          <ArrowLeft className="h-4 w-4" />
          <span>Back</span>
        </Button>
        
        <Button 
          onClick={nextStep}
          disabled={!isValid}
          className="flex items-center space-x-2 bg-gradient-to-r from-aethex-500 to-neon-blue hover:from-aethex-600 hover:to-neon-blue/90"
        >
          <span>Continue</span>
          <ArrowRight className="h-4 w-4" />
        </Button>
      </div>
    </div>
  );
}