"""
库存管理GUI测试模块
使用PyQt测试框架测试库存入库和查询功能
"""

import unittest
import os
import sys
import tempfile
from PyQt5.QtWidgets import QApplication, QMessageBox, QInputDialog
from PyQt5.QtTest import QTest
from PyQt5.QtCore import Qt

# 添加父目录到路径以导入模块
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from database import DatabaseManager
from stock_dialog import StockInDialog


class TestStockGUI(unittest.TestCase):
    """库存管理GUI测试类"""

    @classmethod
    def setUpClass(cls):
        """测试类初始化：创建QApplication实例"""
        cls.app = QApplication.instance()
        if cls.app is None:
            cls.app = QApplication(sys.argv)

    def setUp(self):
        """每个测试前准备：创建临时数据库和对话框"""
        self.temp_dir = tempfile.mkdtemp()
        self.db_path = os.path.join(self.temp_dir, "test_fabric.db")
        self.db_manager = DatabaseManager(self.db_path)

        # 添加测试原料
        with self.db_manager.get_conn() as conn:
            conn.execute('''
                INSERT INTO fabrics (model, category, color, supplier, unit, timestamp)
                VALUES (?, ?, ?, ?, ?, datetime('now'))
            ''', ("TEST-STOCK-001", "布料", "白色", "供应商A", "米"))
            conn.commit()

        # 创建对话框实例
        self.dialog = StockInDialog(self.db_path)

        # 保存原始消息框和输入框
        self._original_msgbox = QMessageBox.information
        self._original_warning = QMessageBox.warning
        self._original_input = QInputDialog.getDouble

        # Mock消息框
        QMessageBox.information = lambda *args, **kwargs: None
        QMessageBox.warning = lambda *args, **kwargs: None

    def tearDown(self):
        """每个测试后清理"""
        # 恢复消息框
        QMessageBox.information = self._original_msgbox
        QMessageBox.warning = self._original_warning
        QInputDialog.getDouble = self._original_input

        # 关闭对话框
        self.dialog.close()
        self.dialog.deleteLater()

        # 清理数据库
        import gc
        gc.collect()
        try:
            if os.path.exists(self.db_path):
                os.remove(self.db_path)
            if os.path.exists(self.temp_dir):
                os.rmdir(self.temp_dir)
        except:
            pass

    # ========== 库存加载测试 ==========

    def test_load_models(self):
        """测试加载原料列表"""
        self.dialog.load_models()

        # 验证表格有数据
        self.assertGreater(self.dialog.table.rowCount(), 0, "表格应该有数据")

        # 验证第一行是测试数据
        model_item = self.dialog.table.item(0, 0)
        self.assertIsNotNone(model_item, "应该有型号数据")
        self.assertEqual(model_item.text(), "TEST-STOCK-001", "型号应该匹配")

    def test_search_models(self):
        """测试搜索原料"""
        # 添加更多测试数据
        with self.dialog.get_conn() as conn:
            conn.execute('''
                INSERT INTO fabrics (model, category, color, unit, timestamp)
                VALUES (?, ?, ?, ?, datetime('now'))
            ''', ("OTHER-001", "布料", "黑色", "米"))
            conn.commit()

        # 搜索特定型号
        self.dialog.search_input.setText("TEST-STOCK")
        self.dialog.load_models()

        # 验证只显示匹配的结果
        row_count = self.dialog.table.rowCount()
        for row in range(row_count):
            model_item = self.dialog.table.item(row, 0)
            if model_item:
                self.assertIn("TEST-STOCK", model_item.text(), "应该只显示匹配的型号")

    # ========== 库存计算测试 ==========

    def test_stock_calculation(self):
        """测试库存数量计算"""
        # 添加入库记录
        with self.dialog.get_conn() as conn:
            conn.execute('''
                INSERT INTO fabric_stock_in (model, quantity, unit, purchase_date)
                VALUES (?, ?, ?, ?)
            ''', ("TEST-STOCK-001", 100.0, "米", "2024-01-01"))
            conn.commit()

        # 刷新表格
        self.dialog.load_models()

        # 验证库存显示
        remaining_item = self.dialog.table.item(0, 4)
        self.assertIsNotNone(remaining_item, "应该有库存数据")
        remaining = float(remaining_item.text())
        self.assertEqual(remaining, 100.0, "库存应该是100.0")

    def test_stock_with_consumption(self):
        """测试库存扣除消耗后的计算"""
        # 添加入库记录
        with self.dialog.get_conn() as conn:
            conn.execute('''
                INSERT INTO fabric_stock_in (model, quantity, unit, purchase_date)
                VALUES (?, ?, ?, ?)
            ''', ("TEST-STOCK-001", 100.0, "米", "2024-01-01"))

            # 添加消耗记录
            conn.execute('''
                INSERT INTO fabric_consumption (model, style_number, consume_quantity, consume_date, unit)
                VALUES (?, ?, ?, ?, ?)
            ''', ("TEST-STOCK-001", "款式001", 30.0, "2024-01-02", "米"))
            conn.commit()

        # 刷新表格
        self.dialog.load_models()

        # 验证库存显示（100 - 30 = 70）
        remaining_item = self.dialog.table.item(0, 4)
        remaining = float(remaining_item.text())
        self.assertEqual(remaining, 70.0, "库存应该是70.0（100-30）")


if __name__ == "__main__":
    unittest.main()