from django import forms
from django.contrib.auth import get_user_model
from B_main.models import Person, WithdrawalRequest  # 또는 Person 모델이 정의된 경로로 import
import random
import re

User = get_user_model()

def format_phone_number(phone):
    """전화번호에서 대시 제거"""
    return re.sub(r'[^0-9]', '', phone)

class CustomFileInput(forms.FileInput):
    def get_context(self, name, value, attrs):
        context = super().get_context(name, value, attrs)
        # "Currently:" 텍스트 제거
        if 'help_text' in context:
            context['help_text'] = ''
        return context

class ProfileFullEditForm(forms.ModelForm):
    # 읽기 전용 필드들
    full_name = forms.CharField(
        label="이름",
        required=False,
        widget=forms.TextInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-100 dark:bg-gray-600 text-gray-700 dark:text-gray-300 border border-gray-300 dark:border-gray-600 focus:outline-none transition-colors duration-300',
            'readonly': 'readonly',
            'placeholder': '이름'
        })
    )
    
    phone_display = forms.CharField(
        label="전화번호",
        required=False,
        widget=forms.TextInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-100 dark:bg-gray-600 text-gray-700 dark:text-gray-300 border border-gray-300 dark:border-gray-600 focus:outline-none transition-colors duration-300',
            'readonly': 'readonly',
            'placeholder': '전화번호'
        })
    )
    
    birth_date_display = forms.CharField(
        label="생년월일",
        required=False,
        widget=forms.TextInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-100 dark:bg-gray-600 text-gray-700 dark:text-gray-300 border border-gray-300 dark:border-gray-600 focus:outline-none transition-colors duration-300',
            'readonly': 'readonly',
            'placeholder': '생년월일'
        })
    )
    
    amp_title_display = forms.CharField(
        label="AMP내직책",
        required=False,
        widget=forms.TextInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-100 dark:bg-gray-600 text-gray-700 dark:text-gray-300 border border-gray-300 dark:border-gray-600 focus:outline-none transition-colors duration-300',
            'readonly': 'readonly',
            'placeholder': 'AMP내직책'
        })
    )

    class Meta:
        model = Person
        fields = [
            '소속', '직책', '주소', 'keyword1', '소개글'
        ]
        widgets = {
            '소속': forms.TextInput(attrs={
                'class': 'w-full px-4 py-3 rounded-xl bg-white dark:bg-gray-700 text-gray-900 dark:text-white border border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 dark:focus:ring-blue-400 transition-colors duration-300',
                'placeholder': '소속 (예: 신라대학교 회계학과)'
            }),
            '직책': forms.TextInput(attrs={
                'class': 'w-full px-4 py-3 rounded-xl bg-white dark:bg-gray-700 text-gray-900 dark:text-white border border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 dark:focus:ring-blue-400 transition-colors duration-300',
                'placeholder': '직책 (예: 교수, 학생, 직원)'
            }),
            '주소': forms.TextInput(attrs={
                'class': 'w-full px-4 py-3 rounded-xl bg-white dark:bg-gray-700 text-gray-900 dark:text-white border border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 dark:focus:ring-blue-400 transition-colors duration-300',
                'placeholder': '주소'
            }),
            'keyword1': forms.TextInput(attrs={
                'class': 'w-full px-4 py-3 rounded-xl bg-white dark:bg-gray-700 text-gray-900 dark:text-white border border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 dark:focus:ring-blue-400 transition-colors duration-300',
                'placeholder': '검색 키워드 (예: 회계감사)'
            }),
            '소개글': forms.Textarea(attrs={
                'class': 'w-full px-4 py-3 rounded-xl bg-white dark:bg-gray-700 text-gray-900 dark:text-white border border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 dark:focus:ring-blue-400 transition-colors duration-300',
                'placeholder': '자신을 소개하는 간단한 글을 작성하세요 (최대 200자)',
                'rows': 4,
                'maxlength': 200
            }),
        }

    def __init__(self, *args, **kwargs):
        self.user = kwargs.pop('user')
        super().__init__(*args, **kwargs)

        # 읽기 전용 필드들 초기값 설정
        if self.instance and self.instance.pk:
            # 이름 설정 (Person 모델의 이름 필드 사용)
            self.fields['full_name'].initial = self.instance.이름
            
            # 전화번호 설정 (Person 모델의 연락처 필드 사용)
            self.fields['phone_display'].initial = self.instance.연락처
            
            # 생년월일 설정
            if self.instance.생년월일:
                self.fields['birth_date_display'].initial = self.instance.생년월일.strftime('%Y-%m-%d')
            else:
                self.fields['birth_date_display'].initial = '설정되지 않음'
            
            # AMP내직책 설정 (TITLE 필드)
            self.fields['amp_title_display'].initial = self.instance.TITLE or '설정되지 않음'

    def save(self, commit=True):
        # Person 모델 저장 (User 모델은 수정하지 않음)
        if commit:
            instance = super().save(commit=False)
            instance.user = self.user
            instance.save()
            
        return self.user

# 모드1: 비밀번호 찾기 폼
class PasswordResetStep1Form(forms.Form):
    """비밀번호 찾기 1단계: 전화번호 인증"""
    phone = forms.CharField(
        max_length=11,
        label='전화번호',
        widget=forms.TextInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '01012345678'
        })
    )
    verification_code = forms.CharField(
        max_length=6,
        label='인증번호',
        required=False,
        widget=forms.TextInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '6자리 인증번호'
        })
    )

    def clean_phone(self):
        phone = self.cleaned_data.get('phone')
        if phone:
            # 전화번호 포맷팅 적용 (대시 제거)
            formatted_phone = format_phone_number(phone)
            
            # 해당 전화번호로 가입된 사용자가 있는지 확인
            try:
                user = User.objects.get(username=formatted_phone)
                return formatted_phone
            except User.DoesNotExist:
                raise forms.ValidationError('등록되지 않은 전화번호입니다.')
        return phone

# 모드2: 로그인 상태 비밀번호 변경 폼
class PasswordChangeLoggedInForm(forms.Form):
    """로그인 상태에서 비밀번호 변경"""
    current_password = forms.CharField(
        label='현재 비밀번호',
        widget=forms.PasswordInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '현재 비밀번호'
        })
    )
    new_password1 = forms.CharField(
        label='새 비밀번호',
        widget=forms.PasswordInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '새 비밀번호'
        })
    )
    new_password2 = forms.CharField(
        label='새 비밀번호 확인',
        widget=forms.PasswordInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '새 비밀번호 확인'
        })
    )

    def __init__(self, *args, **kwargs):
        self.user = kwargs.pop('user', None)
        super().__init__(*args, **kwargs)

    def clean_current_password(self):
        current_password = self.cleaned_data.get('current_password')
        if self.user and not self.user.check_password(current_password):
            raise forms.ValidationError('현재 비밀번호가 올바르지 않습니다.')
        return current_password

    def clean(self):
        cleaned_data = super().clean()
        password1 = cleaned_data.get('new_password1')
        password2 = cleaned_data.get('new_password2')
        
        if password1 and password2 and password1 != password2:
            raise forms.ValidationError('새 비밀번호가 일치하지 않습니다.')
        
        if password1 and len(password1) < 8:
            raise forms.ValidationError('비밀번호는 최소 8자 이상이어야 합니다.')
        
        return cleaned_data

# 모드3: 강제 비밀번호 설정 폼
class ForcePasswordSetForm(forms.Form):
    """강제 비밀번호 설정"""
    new_password1 = forms.CharField(
        label='새 비밀번호',
        widget=forms.PasswordInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '새 비밀번호'
        })
    )
    new_password2 = forms.CharField(
        label='새 비밀번호 확인',
        widget=forms.PasswordInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '새 비밀번호 확인'
        })
    )

    def clean(self):
        cleaned_data = super().clean()
        password1 = cleaned_data.get('new_password1')
        password2 = cleaned_data.get('new_password2')
        
        if password1 and password2 and password1 != password2:
            raise forms.ValidationError('비밀번호가 일치하지 않습니다.')
        
        if password1 and len(password1) < 8:
            raise forms.ValidationError('비밀번호는 최소 8자 이상이어야 합니다.')
        
        return cleaned_data

# 기존 폼들 (유지)
class PasswordChangeStep1Form(forms.Form):
    """비밀번호 변경 1단계: 전화번호 인증"""
    phone = forms.CharField(
        max_length=11,
        label='전화번호',
        widget=forms.TextInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '01012345678'
        })
    )
    verification_code = forms.CharField(
        max_length=6,
        label='인증번호',
        required=False,
        widget=forms.TextInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '6자리 인증번호'
        })
    )

    def clean(self):
        cleaned_data = super().clean()
        phone = cleaned_data.get('phone')
        
        if phone:
            # 전화번호 포맷팅 적용 (대시 제거)
            formatted_phone = format_phone_number(phone)
            cleaned_data['phone'] = formatted_phone
            
            # 현재 로그인한 사용자의 전화번호와 일치하는지 확인
            if not self.user or self.user.username != formatted_phone:
                raise forms.ValidationError('등록된 전화번호와 일치하지 않습니다.')
        
        return cleaned_data

class PasswordChangeStep2Form(forms.Form):
    """비밀번호 변경 2단계: 새 비밀번호 입력"""
    new_password1 = forms.CharField(
        label='새 비밀번호',
        widget=forms.PasswordInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '새 비밀번호'
        })
    )
    new_password2 = forms.CharField(
        label='새 비밀번호 확인',
        widget=forms.PasswordInput(attrs={
            'class': 'w-full px-4 py-3 rounded-xl bg-gray-700 bg-opacity-80 text-white placeholder-gray-400 border border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 transition',
            'placeholder': '새 비밀번호 확인'
        })
    )

    def clean(self):
        cleaned_data = super().clean()
        password1 = cleaned_data.get('new_password1')
        password2 = cleaned_data.get('new_password2')
        
        if password1 and password2 and password1 != password2:
            raise forms.ValidationError('비밀번호가 일치하지 않습니다.')
        
        if password1 and len(password1) < 8:
            raise forms.ValidationError('비밀번호는 최소 8자 이상이어야 합니다.')
        
        return cleaned_data

class WithdrawalRequestForm(forms.ModelForm):
    """회원탈퇴 요청 폼"""
    
    confirm_withdrawal = forms.BooleanField(
        required=True,
        label='위 주의사항을 모두 확인했으며, 회원탈퇴를 요청합니다',
        widget=forms.CheckboxInput(attrs={
            'class': 'w-4 h-4 text-red-600 bg-gray-700 border-gray-600 rounded focus:ring-red-500 focus:ring-2'
        }),
        error_messages={
            'required': '탈퇴 확인을 체크해주세요'
        }
    )
    
    class Meta:
        model = WithdrawalRequest
        fields = []
    
    def __init__(self, *args, **kwargs):
        self.user = kwargs.pop('user', None)
        super().__init__(*args, **kwargs)
    
    def save(self, commit=True):
        withdrawal_request = super().save(commit=False)
        
        if self.user:
            withdrawal_request.user = self.user
            try:
                withdrawal_request.person = Person.objects.get(user=self.user)
            except Person.DoesNotExist:
                raise forms.ValidationError('사용자의 Person 정보를 찾을 수 없습니다.')
        
        if commit:
            withdrawal_request.save()
        
        return withdrawal_request