import React from 'react';
import { motion } from 'framer-motion';
import { ToggleLeft, ToggleRight, Zap, Check } from 'lucide-react';
import { Card, Button, Select } from '@/components/common';
import Modal from '@/components/common/Modal';
import { useJobStore } from '@/store/appStore';
import { jobsAPI } from '@/utils/api';
import type { TailoringMode, LLMProvider } from '@/types';

interface SettingsModalProps {
  isOpen: boolean;
  onClose: () => void;
}

const SettingsModal: React.FC<SettingsModalProps> = ({ isOpen, onClose }) => {
  const {
    tailoringMode,
    llmProvider,
    setEnableProfessionalSummary: setStoreProfessionalSummary,
    setIncludeCoverLetters: setStoreCoverLetters,
    setTailoringMode,
    setLLMProvider,
    setNotification,
  } = useJobStore();

  const [draftMode, setDraftMode] = React.useState<TailoringMode>(tailoringMode);
  const [draftProvider, setDraftProvider] = React.useState<LLMProvider>(llmProvider || 'groq');
  const [enableProfessionalSummary, setEnableProfessionalSummary] = React.useState(false);
  const [includeCoverLetters, setIncludeCoverLetters] = React.useState(false);
  const [isSaving, setIsSaving] = React.useState(false);
  const [isLoading, setIsLoading] = React.useState(false);

  const llmProviders: Array<{ value: LLMProvider; label: string; description: string }> = [
    { value: 'ollama', label: 'Ollama (Local)', description: 'Runs locally, slowest' },
    { value: 'groq', label: 'Groq API', description: 'Fast and cost-effective' },
    { value: 'grok', label: 'Grok API', description: 'Fast and affordable' },
    { value: 'openai', label: 'OpenAI', description: 'Premium quality' },
  ];

  React.useEffect(() => {
    if (!isOpen) {
      return;
    }

    setDraftMode(tailoringMode);
    setDraftProvider(llmProvider || 'groq');

    const loadConfig = async () => {
      setIsLoading(true);
      try {
        const config = await jobsAPI.getConfig();
        setDraftMode(config.tailoring_mode);
        setDraftProvider(config.llm_provider);
        setEnableProfessionalSummary(!!config.enable_professional_summary);
        setIncludeCoverLetters(!!config.include_cover_letters);
        setTailoringMode(config.tailoring_mode);
        setLLMProvider(config.llm_provider);
        setStoreProfessionalSummary(!!config.enable_professional_summary);
        setStoreCoverLetters(!!config.include_cover_letters);
      } catch (error) {
        setNotification({
          type: 'error',
          message: 'Could not load settings. Using current values.',
        });
      } finally {
        setIsLoading(false);
      }
    };

    void loadConfig();
  }, [
    isOpen,
    llmProvider,
    setLLMProvider,
    setNotification,
    setStoreCoverLetters,
    setStoreProfessionalSummary,
    setTailoringMode,
    tailoringMode,
  ]);

  const handleSave = async () => {
    setIsSaving(true);
    try {
      await jobsAPI.saveSettings({
        tailoring_mode: draftMode,
        llm_provider: draftProvider,
        enable_professional_summary: enableProfessionalSummary,
        include_cover_letters: includeCoverLetters,
      });

      setTailoringMode(draftMode);
      setLLMProvider(draftProvider);
      setStoreProfessionalSummary(enableProfessionalSummary);
      setStoreCoverLetters(includeCoverLetters);

      setNotification({
        type: 'success',
        message: 'Settings saved successfully',
      });
      onClose();
    } catch (error) {
      setNotification({
        type: 'error',
        message: 'Failed to save settings',
      });
    } finally {
      setIsSaving(false);
    }
  };

  return (
    <Modal isOpen={isOpen} onClose={onClose} title="Settings" size="md">
      <motion.div className="space-y-6">
        {/* Tailoring Mode Section */}
        <Card>
          <div className="flex items-center justify-between mb-4">
            <div>
              <h3 className="font-semibold text-white flex items-center gap-2">
                <Zap className="w-5 h-5 text-emerald-400" />
                CV Tailoring Mode
              </h3>
              <p className="text-xs text-slate-400 mt-1">
                Choose how your CVs are tailored to job descriptions
              </p>
            </div>
          </div>

          <div className="space-y-3">
            {[
              {
                mode: 'local' as TailoringMode,
                label: 'Smart Mode (Local)',
                description: 'Uses NLP-based skill matching',
                icon: ToggleLeft,
              },
              {
                mode: 'api' as TailoringMode,
                label: 'AI Mode (API)',
                description: 'Uses advanced AI models for better tailoring',
                icon: ToggleRight,
              },
            ].map((option) => (
              <motion.button
                key={option.mode}
                whileHover={{ x: 4 }}
                onClick={() => setDraftMode(option.mode)}
                className={`w-full p-3 rounded-lg border transition-all ${
                  draftMode === option.mode
                    ? 'border-emerald-500 bg-emerald-500/10'
                    : 'border-slate-700 bg-slate-800/30 hover:border-emerald-400/30'
                }`}
                disabled={isLoading || isSaving}
              >
                <div className="flex items-center gap-3">
                  <option.icon
                    className={`w-5 h-5 ${
                      draftMode === option.mode
                        ? 'text-emerald-400'
                        : 'text-slate-400'
                    }`}
                  />
                  <div className="text-left">
                    <p className="font-medium text-white text-sm">
                      {option.label}
                    </p>
                    <p className="text-xs text-slate-400">
                      {option.description}
                    </p>
                  </div>
                  {draftMode === option.mode && (
                    <div className="ml-auto w-2 h-2 bg-emerald-400 rounded-full" />
                  )}
                </div>
              </motion.button>
            ))}
          </div>
        </Card>

        {/* LLM Provider Section (if API mode) */}
        {draftMode === 'api' && (
          <Card>
            <h3 className="font-semibold text-white mb-4">
              AI Model Provider
            </h3>
            <Select
              label="Select Provider"
              value={draftProvider}
              onChange={(e) => setDraftProvider(e.target.value as LLMProvider)}
              options={llmProviders.map((p) => ({
                value: p.value,
                label: `${p.label} - ${p.description}`,
              }))}
            />
            <p className="text-xs text-slate-400 mt-3">
              Each provider has different speeds and quality levels. Get API keys
              from the provider's website.
            </p>
          </Card>
        )}

        {/* Advanced Settings */}
        <Card>
          <h3 className="font-semibold text-white mb-4">Advanced Options</h3>
          <div className="space-y-3">
            {[
              {
                key: 'summary',
                label: 'Enable Professional Summary',
                description: 'Automatically generate personalized summaries',
                enabled: enableProfessionalSummary,
                onToggle: () => setEnableProfessionalSummary((prev) => !prev),
              },
              {
                key: 'cover',
                label: 'Include Cover Letters',
                description: 'Generate cover letters along with CVs',
                enabled: includeCoverLetters,
                onToggle: () => setIncludeCoverLetters((prev) => !prev),
              },
            ].map((option) => (
              <motion.div
                key={option.key}
                whileHover={{ x: 2 }}
                className={`flex items-center justify-between p-3 bg-slate-800/30 border rounded-lg transition-colors ${
                  option.enabled
                    ? 'border-emerald-500/40'
                    : 'border-slate-700 hover:border-slate-600'
                }`}
              >
                <div>
                  <p className="font-medium text-white text-sm">
                    {option.label}
                  </p>
                  <p className="text-xs text-slate-400">
                    {option.description}
                  </p>
                </div>
                <motion.button
                  whileTap={{ scale: 0.95 }}
                  onClick={option.onToggle}
                  disabled={isLoading || isSaving}
                  className={`w-7 h-7 rounded-md border-2 flex items-center justify-center transition-colors ${
                    option.enabled
                      ? 'bg-emerald-500/20 border-emerald-400 text-emerald-300'
                      : 'border-slate-600 text-transparent hover:border-slate-500'
                  }`}
                  aria-label={`Toggle ${option.label}`}
                >
                  <Check className="w-4 h-4" />
                </motion.button>
              </motion.div>
            ))}
          </div>
        </Card>

        {/* Action Buttons */}
        <div className="flex gap-3 pt-4 border-t border-slate-700">
          <Button variant="secondary" onClick={onClose} fullWidth>
            Close
          </Button>
          <Button onClick={handleSave} fullWidth loading={isSaving}>
            Save Changes
          </Button>
        </div>
      </motion.div>
    </Modal>
  );
};

export default SettingsModal;