# -*- coding: utf-8 -*-
"""可复用的 ODS 任务选择组件：按业务域分组显示，支持全选/反选。"""

from typing import Dict, List, Optional, Set

from PySide6.QtWidgets import (
    QWidget, QVBoxLayout, QHBoxLayout, QGroupBox,
    QCheckBox, QPushButton, QScrollArea, QFrame,
    QLabel, QSizePolicy
)
from PySide6.QtCore import Signal, Qt

from ..models.task_registry import (
    TaskRegistry, TaskDefinition, BusinessDomain, DOMAIN_LABELS,
    task_registry, get_fact_ods_task_codes, get_dimension_ods_task_codes
)


class TaskSelectorWidget(QWidget):
    """ODS 任务选择组件：按业务域分组显示"""
    
    # 选择变化信号
    selection_changed = Signal(list)  # 选中的任务编码列表
    
    def __init__(
        self,
        parent: Optional[QWidget] = None,
        show_dimensions: bool = True,
        show_facts: bool = True,
        default_select_facts: bool = True,
        default_select_dimensions: bool = False,
        compact: bool = False,
        max_height: int = 0,
    ):
        """
        初始化任务选择器
        
        Args:
            parent: 父组件
            show_dimensions: 是否显示维度类任务
            show_facts: 是否显示事实类任务
            default_select_facts: 默认选中事实类任务
            default_select_dimensions: 默认选中维度类任务
            compact: 紧凑模式（更小的间距）
            max_height: 最大高度（0 表示不限制）
        """
        super().__init__(parent)
        self.show_dimensions = show_dimensions
        self.show_facts = show_facts
        self.default_select_facts = default_select_facts
        self.default_select_dimensions = default_select_dimensions
        self.compact = compact
        self.max_height = max_height
        
        # 任务复选框映射：code -> QCheckBox
        self._checkboxes: Dict[str, QCheckBox] = {}
        # 业务域分组框映射：domain -> QGroupBox
        self._domain_groups: Dict[BusinessDomain, QGroupBox] = {}
        
        self._init_ui()
        self._apply_default_selection()
    
    def _init_ui(self):
        """初始化界面"""
        layout = QVBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        spacing = 4 if self.compact else 8
        layout.setSpacing(spacing)
        
        # 顶部工具栏
        toolbar = QHBoxLayout()
        toolbar.setSpacing(8)
        
        self.select_all_btn = QPushButton("全选")
        self.select_all_btn.setProperty("secondary", True)
        self.select_all_btn.setFixedWidth(60)
        self.select_all_btn.clicked.connect(self._select_all)
        toolbar.addWidget(self.select_all_btn)
        
        self.deselect_all_btn = QPushButton("全不选")
        self.deselect_all_btn.setProperty("secondary", True)
        self.deselect_all_btn.setFixedWidth(60)
        self.deselect_all_btn.clicked.connect(self._deselect_all)
        toolbar.addWidget(self.deselect_all_btn)
        
        self.select_facts_btn = QPushButton("选事实表")
        self.select_facts_btn.setProperty("secondary", True)
        self.select_facts_btn.setFixedWidth(70)
        self.select_facts_btn.setToolTip("选中所有事实类任务（需要时间窗口的任务）")
        self.select_facts_btn.clicked.connect(self._select_facts_only)
        toolbar.addWidget(self.select_facts_btn)
        
        toolbar.addStretch()
        
        self.selected_count_label = QLabel("已选: 0")
        self.selected_count_label.setProperty("subheading", True)
        toolbar.addWidget(self.selected_count_label)
        
        layout.addLayout(toolbar)
        
        # 滚动区域
        scroll_area = QScrollArea()
        scroll_area.setWidgetResizable(True)
        scroll_area.setFrameShape(QFrame.NoFrame)
        if self.max_height > 0:
            scroll_area.setMaximumHeight(self.max_height)
        
        # 内容容器
        content_widget = QWidget()
        content_layout = QVBoxLayout(content_widget)
        content_layout.setContentsMargins(0, 0, 0, 0)
        content_layout.setSpacing(spacing)
        
        # 按业务域分组创建复选框
        grouped_tasks = task_registry.get_ods_tasks_grouped()
        
        # 定义业务域显示顺序
        domain_order = [
            BusinessDomain.MEMBER,
            BusinessDomain.SETTLEMENT,
            BusinessDomain.ASSISTANT,
            BusinessDomain.GOODS,
            BusinessDomain.TABLE,
            BusinessDomain.PROMOTION,
            BusinessDomain.INVENTORY,
        ]
        
        for domain in domain_order:
            if domain not in grouped_tasks:
                continue
            
            tasks = grouped_tasks[domain]
            # 过滤任务
            filtered_tasks = []
            for task in tasks:
                if task.is_dimension and not self.show_dimensions:
                    continue
                if not task.is_dimension and not self.show_facts:
                    continue
                filtered_tasks.append(task)
            
            if not filtered_tasks:
                continue
            
            # 创建业务域分组
            group_box = self._create_domain_group(domain, filtered_tasks)
            self._domain_groups[domain] = group_box
            content_layout.addWidget(group_box)
        
        content_layout.addStretch()
        scroll_area.setWidget(content_widget)
        layout.addWidget(scroll_area, 1)
    
    def _create_domain_group(self, domain: BusinessDomain, tasks: List[TaskDefinition]) -> QGroupBox:
        """创建业务域分组框"""
        group_box = QGroupBox(DOMAIN_LABELS.get(domain, str(domain.value)))
        group_layout = QVBoxLayout(group_box)
        group_layout.setContentsMargins(8, 4, 8, 4)
        group_layout.setSpacing(2)
        
        for task in tasks:
            checkbox = QCheckBox(f"{task.name}")
            checkbox.setToolTip(f"{task.code}: {task.description}")
            checkbox.setProperty("task_code", task.code)
            checkbox.setProperty("is_dimension", task.is_dimension)
            checkbox.stateChanged.connect(self._on_selection_changed)
            
            self._checkboxes[task.code] = checkbox
            group_layout.addWidget(checkbox)
        
        return group_box
    
    def _apply_default_selection(self):
        """应用默认选择"""
        for code, checkbox in self._checkboxes.items():
            is_dimension = checkbox.property("is_dimension")
            if is_dimension:
                checkbox.setChecked(self.default_select_dimensions)
            else:
                checkbox.setChecked(self.default_select_facts)
        
        self._update_count_label()
    
    def _on_selection_changed(self):
        """选择变化时"""
        self._update_count_label()
        self.selection_changed.emit(self.get_selected_codes())
    
    def _update_count_label(self):
        """更新选中计数标签"""
        count = len(self.get_selected_codes())
        total = len(self._checkboxes)
        self.selected_count_label.setText(f"已选: {count}/{total}")
    
    def _select_all(self):
        """全选"""
        for checkbox in self._checkboxes.values():
            checkbox.blockSignals(True)
            checkbox.setChecked(True)
            checkbox.blockSignals(False)
        self._on_selection_changed()
    
    def _deselect_all(self):
        """全不选"""
        for checkbox in self._checkboxes.values():
            checkbox.blockSignals(True)
            checkbox.setChecked(False)
            checkbox.blockSignals(False)
        self._on_selection_changed()
    
    def _select_facts_only(self):
        """只选事实表任务"""
        for code, checkbox in self._checkboxes.items():
            checkbox.blockSignals(True)
            is_dimension = checkbox.property("is_dimension")
            checkbox.setChecked(not is_dimension)
            checkbox.blockSignals(False)
        self._on_selection_changed()
    
    def get_selected_codes(self) -> List[str]:
        """获取选中的任务编码列表"""
        selected = []
        for code, checkbox in self._checkboxes.items():
            if checkbox.isChecked():
                selected.append(code)
        return selected
    
    def set_selected_codes(self, codes: List[str]):
        """设置选中的任务编码"""
        codes_set = set(codes)
        for code, checkbox in self._checkboxes.items():
            checkbox.blockSignals(True)
            checkbox.setChecked(code in codes_set)
            checkbox.blockSignals(False)
        self._on_selection_changed()
    
    def get_all_codes(self) -> List[str]:
        """获取所有任务编码"""
        return list(self._checkboxes.keys())
    
    def is_any_selected(self) -> bool:
        """是否有任何任务被选中"""
        return len(self.get_selected_codes()) > 0


class CompactTaskSelector(QWidget):
    """紧凑型任务选择器：单行显示业务域，点击展开选择"""
    
    selection_changed = Signal(list)
    
    def __init__(
        self,
        parent: Optional[QWidget] = None,
        show_dimensions: bool = True,
        show_facts: bool = True,
        default_select_facts: bool = True,
        default_select_dimensions: bool = False,
    ):
        super().__init__(parent)
        self.show_dimensions = show_dimensions
        self.show_facts = show_facts
        self.default_select_facts = default_select_facts
        self.default_select_dimensions = default_select_dimensions
        
        # 业务域复选框
        self._domain_checkboxes: Dict[BusinessDomain, QCheckBox] = {}
        # 业务域下的任务编码
        self._domain_tasks: Dict[BusinessDomain, List[str]] = {}
        
        self._init_ui()
        self._apply_default_selection()
    
    def _init_ui(self):
        """初始化界面"""
        layout = QVBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.setSpacing(4)
        
        # 工具栏
        toolbar = QHBoxLayout()
        toolbar.setSpacing(8)
        
        self.select_all_btn = QPushButton("全选")
        self.select_all_btn.setProperty("secondary", True)
        self.select_all_btn.setFixedWidth(50)
        self.select_all_btn.clicked.connect(self._select_all)
        toolbar.addWidget(self.select_all_btn)
        
        self.deselect_all_btn = QPushButton("清空")
        self.deselect_all_btn.setProperty("secondary", True)
        self.deselect_all_btn.setFixedWidth(50)
        self.deselect_all_btn.clicked.connect(self._deselect_all)
        toolbar.addWidget(self.deselect_all_btn)
        
        toolbar.addStretch()
        
        self.count_label = QLabel("已选: 0")
        self.count_label.setProperty("subheading", True)
        toolbar.addWidget(self.count_label)
        
        layout.addLayout(toolbar)
        
        # 业务域复选框（横向排列）
        domains_layout = QHBoxLayout()
        domains_layout.setSpacing(12)
        
        grouped_tasks = task_registry.get_ods_tasks_grouped()
        domain_order = [
            BusinessDomain.MEMBER,
            BusinessDomain.SETTLEMENT,
            BusinessDomain.ASSISTANT,
            BusinessDomain.GOODS,
            BusinessDomain.TABLE,
            BusinessDomain.PROMOTION,
            BusinessDomain.INVENTORY,
        ]
        
        for domain in domain_order:
            if domain not in grouped_tasks:
                continue
            
            tasks = grouped_tasks[domain]
            # 过滤任务
            task_codes = []
            for task in tasks:
                if task.is_dimension and not self.show_dimensions:
                    continue
                if not task.is_dimension and not self.show_facts:
                    continue
                task_codes.append(task.code)
            
            if not task_codes:
                continue
            
            self._domain_tasks[domain] = task_codes
            
            checkbox = QCheckBox(DOMAIN_LABELS.get(domain, str(domain.value)))
            checkbox.setToolTip(f"包含: {', '.join(task_codes)}")
            checkbox.stateChanged.connect(self._on_selection_changed)
            self._domain_checkboxes[domain] = checkbox
            domains_layout.addWidget(checkbox)
        
        domains_layout.addStretch()
        layout.addLayout(domains_layout)
    
    def _apply_default_selection(self):
        """应用默认选择"""
        # 默认选中所有业务域
        for domain, checkbox in self._domain_checkboxes.items():
            checkbox.setChecked(True)
        self._update_count_label()
    
    def _on_selection_changed(self):
        """选择变化时"""
        self._update_count_label()
        self.selection_changed.emit(self.get_selected_codes())
    
    def _update_count_label(self):
        """更新计数标签"""
        count = len(self.get_selected_codes())
        self.count_label.setText(f"已选: {count} 个任务")
    
    def _select_all(self):
        """全选所有业务域"""
        for checkbox in self._domain_checkboxes.values():
            checkbox.blockSignals(True)
            checkbox.setChecked(True)
            checkbox.blockSignals(False)
        self._on_selection_changed()
    
    def _deselect_all(self):
        """取消全选"""
        for checkbox in self._domain_checkboxes.values():
            checkbox.blockSignals(True)
            checkbox.setChecked(False)
            checkbox.blockSignals(False)
        self._on_selection_changed()
    
    def get_selected_codes(self) -> List[str]:
        """获取选中的任务编码"""
        selected = []
        for domain, checkbox in self._domain_checkboxes.items():
            if checkbox.isChecked():
                selected.extend(self._domain_tasks.get(domain, []))
        return selected
    
    def set_selected_domains(self, domains: List[BusinessDomain]):
        """设置选中的业务域"""
        domains_set = set(domains)
        for domain, checkbox in self._domain_checkboxes.items():
            checkbox.blockSignals(True)
            checkbox.setChecked(domain in domains_set)
            checkbox.blockSignals(False)
        self._on_selection_changed()
    
    def is_any_selected(self) -> bool:
        """是否有任何任务被选中"""
        return len(self.get_selected_codes()) > 0