# connection_tab.py
"""页面1：Modbus TCP 连接参数设置"""

import os
from PySide6.QtWidgets import (
    QWidget, QVBoxLayout, QHBoxLayout, QGridLayout,
    QLabel, QLineEdit, QPushButton, QFrame,
    QSizePolicy, QGraphicsDropShadowEffect
)
from PySide6.QtCore import Qt, QSize
from PySide6.QtGui import QColor, QIcon


_SRC_DIR = os.path.normpath(os.path.join(os.path.dirname(__file__), "..", "src"))


# ==========================================
# 工具函数：创建带左侧蓝色竖线的 Section 卡片
# ==========================================
def _make_section_card(parent, title_text: str, colors: dict):
    card = QFrame(parent)
    card.setProperty("cssClass", "sectionCard")
    card.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)

    # 添加微弱的模糊阴影效果
    shadow = QGraphicsDropShadowEffect(card)
    shadow.setColor(QColor(0, 0, 0, 12))
    shadow.setBlurRadius(16)
    shadow.setOffset(0, 4)
    card.setGraphicsEffect(shadow)

    outer = QVBoxLayout(card)
    outer.setContentsMargins(0, 0, 0, 0)
    outer.setSpacing(0)

    # ---- 标题行（蓝色左竖线 + 标题文字） ----
    title_row = QHBoxLayout()
    title_row.setContentsMargins(20, 16, 20, 0)
    title_row.setSpacing(10)

    accent = QWidget()
    accent.setProperty("cssClass", "sectionAccent")
    accent.setFixedSize(4, 16)
    title_row.addWidget(accent)

    title_lbl = QLabel(title_text)
    title_lbl.setProperty("cssClass", "sectionTitle")
    title_row.addWidget(title_lbl)
    title_row.addStretch()
    outer.addLayout(title_row)

    # ---- 内容区 ----
    content_widget = QWidget()
    content_widget.setStyleSheet("background-color: transparent;")
    content_layout = QGridLayout(content_widget)
    content_layout.setContentsMargins(20, 14, 20, 18)
    content_layout.setHorizontalSpacing(0)
    content_layout.setVerticalSpacing(10)
    # 列0（标签）固定宽度，列1（输入框）拉伸
    content_layout.setColumnMinimumWidth(0, 148)
    content_layout.setColumnStretch(1, 1)
    outer.addWidget(content_widget)

    return card, content_layout


# ==========================================
# 工具函数：创建表单标签（左对齐）
# ==========================================
def _form_label(text: str, parent=None):
    lbl = QLabel(text, parent)
    lbl.setProperty("cssClass", "formLabel")
    lbl.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
    return lbl


class ConnectionTab(QWidget):
    """连接设置页面"""

    def __init__(self, colors: dict, parent=None):
        super().__init__(parent)
        self.setProperty("cssClass", "tabPage")
        self.colors = colors

        main_layout = QVBoxLayout(self)
        main_layout.setContentsMargins(20, 16, 20, 16)
        main_layout.setSpacing(14)

        # ==========================================
        # Section: Modbus TCP
        # ==========================================
        tcp_card, tcp_layout = _make_section_card(self, "Modbus TCP", colors)
        self._build_tcp_section(tcp_layout)
        main_layout.addWidget(tcp_card)

        # ==========================================
        # 按钮组
        # ==========================================
        btn_row = QHBoxLayout()
        btn_row.setContentsMargins(0, 4, 0, 0)
        btn_row.setSpacing(12)

        # 连接设备按钮
        self.connect_btn = QPushButton("  连接设备")
        self.connect_btn.setObjectName("connect_btn")
        self.connect_btn.setIcon(QIcon(os.path.join(_SRC_DIR, "connect_device.svg")))
        self.connect_btn.setIconSize(QSize(18, 18))
        self.connect_btn.setCursor(Qt.PointingHandCursor)

        # 保存按钮引用（connect/disconnect 切换文字时使用）
        self._connect_text_lbl = self.connect_btn

        btn_row.addWidget(self.connect_btn)
        btn_row.addStretch()

        main_layout.addLayout(btn_row)
        main_layout.addStretch()

    # ==========================================
    # Modbus TCP 表单
    # ==========================================
    def _build_tcp_section(self, grid: QGridLayout):
        row = 0

        grid.addWidget(_form_label("模块地址：", self), row, 0)
        self.tcp_ip_entry = QLineEdit("192.168.1.12")
        self.tcp_ip_entry.setPlaceholderText("输入模块 IP地址")
        grid.addWidget(self.tcp_ip_entry, row, 1)
        row += 1

        grid.addWidget(_form_label("端口：", self), row, 0)
        self.tcp_port_entry = QLineEdit("502")
        self.tcp_port_entry.setPlaceholderText("默认502")
        grid.addWidget(self.tcp_port_entry, row, 1)
        row += 1

        grid.addWidget(_form_label("读取压力寄存器地址：", self), row, 0)
        self.pressure_addr_entry = QLineEdit("0")
        self.pressure_addr_entry.setPlaceholderText("寄存器地址")
        grid.addWidget(self.pressure_addr_entry, row, 1)
        row += 1

        grid.addWidget(_form_label("电机地址：", self), row, 0)
        self.motor_addr_entry = QLineEdit("0")
        self.motor_addr_entry.setPlaceholderText("电机模拟量通道地址")
        grid.addWidget(self.motor_addr_entry, row, 1)
        row += 1

        grid.addWidget(_form_label("流量计地址：", self), row, 0)
        self.flowmeter_addr_entry = QLineEdit("1")
        self.flowmeter_addr_entry.setPlaceholderText("留空则使用手动输入流量")
        grid.addWidget(self.flowmeter_addr_entry, row, 1)
        row += 1

        grid.addWidget(_form_label("压力表量程：", self), row, 0)
        self.pressure_range_entry = QLineEdit("400")
        self.pressure_range_entry.setPlaceholderText("压力传感器量程上限")
        grid.addWidget(self.pressure_range_entry, row, 1)
        row += 1

        grid.addWidget(_form_label("流量计量程：", self), row, 0)
        self.flow_range_entry = QLineEdit("300")
        self.flow_range_entry.setPlaceholderText("流量计量程上限")
        grid.addWidget(self.flow_range_entry, row, 1)

    # ---- 公开方法 ----
    def get_connection_params(self) -> dict:
        flow_str = self.flowmeter_addr_entry.text().strip()
        return {
            "tcp_ip": self.tcp_ip_entry.text().strip(),
            "tcp_port": int(self.tcp_port_entry.text() or "502"),
            "pressure_addr": int(self.pressure_addr_entry.text() or "504"),
            "motor_addr": int(self.motor_addr_entry.text() or "0"),
            "flowmeter_addr": int(flow_str) if flow_str else None,
            "pressure_range": float(self.pressure_range_entry.text() or "400"),
            "flow_range": float(self.flow_range_entry.text() or "300"),
        }