# -*- coding: utf-8 -*-
"""
할일 입력 다이얼로그 모듈
할일 입력을 위한 다이얼로그입니다.
"""

from datetime import date, datetime, time
from typing import List, Optional

from PySide6.QtWidgets import (
    QWidget, QHBoxLayout, QVBoxLayout, QLabel, QPushButton
)
from PySide6.QtCore import Qt, Signal
from PySide6.QtGui import QFont

from ui.base.base_dialog import BaseDialog
from ui.components.custom_input import CustomLineEdit, CustomTextEdit, LabeledInput
from database.models import Todo, TodoCategory
from core.config import ConfigManager
from core.logger import get_logger

logger = get_logger(__name__)


class CategoryChip(QPushButton):
    """카테고리 선택 칩"""
    
    chip_selected = Signal(str)  # category
    
    def __init__(self, category: str, icon: str = "", parent=None):
        super().__init__(parent)
        
        self.config = ConfigManager()
        self.category = category
        self._is_selected = False
        
        if category == TodoCategory.ARRIVAL_INSPECTION:
            self.setText(f"🚃 {category}")
            self.icon_color = "#8b5cf6"
        elif category == TodoCategory.TASK:
            self.setText(f"🔧 {category}")
            self.icon_color = "#f59e0b"
        else:
            self.setText(f"📝 {category}")
            self.icon_color = "#3b82f6"
        
        self.setMinimumWidth(90)
        self.setFixedHeight(36)
        self.setCursor(Qt.PointingHandCursor)
        self.setFont(QFont("GmarketSans", 11, QFont.Bold))
        
        self.clicked.connect(self._on_clicked)
        self._apply_style()
    
    def _on_clicked(self):
        """클릭 이벤트"""
        self.chip_selected.emit(self.category)
    
    def set_selected(self, selected: bool):
        """선택 상태 설정"""
        self._is_selected = selected
        self._apply_style()
    
    def _apply_style(self):
        """스타일 적용"""
        theme = self.config.theme
        
        if self._is_selected:
            self.setStyleSheet(f"""
                QPushButton {{
                    background-color: {self.icon_color};
                    color: white;
                    border: 3px solid {self.icon_color};
                    border-radius: 8px;
                    padding: 0 12px;
                    font-weight: bold;
                }}
            """)
        else:
            if theme == 'dark':
                bg = "#334155"
                text = "#94a3b8"
            else:
                bg = "#e2e8f0"
                text = "#64748b"
            
            self.setStyleSheet(f"""
                QPushButton {{
                    background-color: {bg};
                    color: {text};
                    border: 2px solid transparent;
                    border-radius: 8px;
                    padding: 0 12px;
                }}
                QPushButton:hover {{
                    background-color: {self.icon_color};
                    color: white;
                }}
            """)


class TodoInputDialog(BaseDialog):
    """할일 입력 다이얼로그"""
    
    def __init__(
        self,
        parent=None,
        todo_date: date = None,
        todo: Todo = None
    ):
        title = "할일 추가" if todo is None else "할일 편집"
        super().__init__(parent, title=title, width=450, height=500)
        
        self.todo_date = todo_date or date.today()
        self.todo = todo
        
        self._selected_category: str = TodoCategory.GENERAL
        self._category_chips: List[CategoryChip] = []
        
        self._setup_fields()
        self.add_confirm_cancel_buttons()
        
        if todo:
            self._load_todo(todo)
    
    def _setup_fields(self):
        """필드 설정"""
        theme = self.config.theme
        text_color = "#f8fafc" if theme == 'dark' else "#1e293b"
        
        # 카테고리 섹션
        category_label = QLabel("카테고리")
        category_label.setFont(QFont("GmarketSans", 12, QFont.Bold))
        category_label.setStyleSheet(f"color: {text_color};")
        self.content_layout.addWidget(category_label)
        
        # 카테고리 칩 컨테이너
        category_container = QWidget()
        category_layout = QHBoxLayout(category_container)
        category_layout.setContentsMargins(0, 0, 0, 0)
        category_layout.setSpacing(8)
        
        categories = [TodoCategory.GENERAL, TodoCategory.ARRIVAL_INSPECTION, TodoCategory.TASK]
        for cat in categories:
            chip = CategoryChip(cat)
            chip.chip_selected.connect(self._on_category_selected)
            self._category_chips.append(chip)
            category_layout.addWidget(chip)
        
        # 기본 선택: 일반
        self._category_chips[0].set_selected(True)
        
        category_layout.addStretch()
        self.content_layout.addWidget(category_container)
        
        # 내용
        self.content_input = CustomTextEdit(
            placeholder="할일 내용을 입력하세요",
            min_height=80
        )
        self.content_layout.addWidget(
            LabeledInput("내용", self.content_input, required=True)
        )
        
        # 대상편성
        self.train_input = CustomLineEdit(placeholder="예: 151A (선택)")
        self.content_layout.addWidget(
            LabeledInput("대상편성", self.train_input)
        )
        
        # 일정
        self.schedule_input = CustomLineEdit(placeholder="예: 오전 10시 (선택)")
        self.content_layout.addWidget(
            LabeledInput("일정", self.schedule_input)
        )
        
        self.content_layout.addStretch()
    
    def _on_category_selected(self, category: str):
        """카테고리 선택"""
        for chip in self._category_chips:
            chip.set_selected(chip.category == category)
        
        self._selected_category = category
    
    def _load_todo(self, todo: Todo):
        """할일 데이터 로드"""
        self.content_input.set_text(todo.content or "")
        self.train_input.setText(todo.target_train or "")
        self.schedule_input.setText(todo.schedule or "")
        
        # 카테고리 선택
        category = todo.category or TodoCategory.GENERAL
        self._on_category_selected(category)
    
    def get_data(self) -> dict:
        """입력 데이터 반환"""
        return {
            "todo_date": self.todo_date.isoformat(),
            "category": self._selected_category,
            "content": self.content_input.get_text(),
            "target_train": self.train_input.text(),
            "schedule": self.schedule_input.text(),
            "is_completed": False,
        }