# -*- coding: utf-8 -*-
"""
生成《网关配置工具使用说明书》PDF
"""
import os
from reportlab.lib.pagesizes import A4
from reportlab.lib.units import mm, cm
from reportlab.lib.colors import HexColor, white, black
from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.lib.enums import TA_CENTER, TA_LEFT, TA_JUSTIFY
from reportlab.platypus import (
    SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle,
    PageBreak, KeepTogether, HRFlowable
)
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont

# ── 注册中文字体 ──────────────────────────────────────────────
FONT_DIR = os.path.join(os.environ.get("WINDIR", r"C:\Windows"), "Fonts")
FONT_NAME = "SimSun"
FONT_BOLD = "SimHei"
pdfmetrics.registerFont(TTFont(FONT_NAME, os.path.join(FONT_DIR, "simsun.ttc")))
pdfmetrics.registerFont(TTFont(FONT_BOLD, os.path.join(FONT_DIR, "simhei.ttf")))

# ── 颜色 ─────────────────────────────────────────────────────
PRIMARY = HexColor("#1565C0")
ACCENT = HexColor("#4CAF50")
LIGHT_BG = HexColor("#E3F2FD")
TABLE_HEAD_BG = HexColor("#1565C0")
TABLE_ALT_BG = HexColor("#F5F5F5")
BORDER_COLOR = HexColor("#BDBDBD")

# ── 样式 ──────────────────────────────────────────────────────
styles = getSampleStyleSheet()

style_title = ParagraphStyle(
    "CoverTitle", fontName=FONT_BOLD, fontSize=28, leading=40,
    alignment=TA_CENTER, textColor=PRIMARY, spaceAfter=10 * mm
)
style_subtitle = ParagraphStyle(
    "CoverSub", fontName=FONT_NAME, fontSize=14, leading=20,
    alignment=TA_CENTER, textColor=HexColor("#616161"), spaceAfter=6 * mm
)
style_h1 = ParagraphStyle(
    "H1", fontName=FONT_BOLD, fontSize=18, leading=26,
    textColor=PRIMARY, spaceBefore=12 * mm, spaceAfter=4 * mm
)
style_h2 = ParagraphStyle(
    "H2", fontName=FONT_BOLD, fontSize=14, leading=20,
    textColor=HexColor("#1976D2"), spaceBefore=8 * mm, spaceAfter=3 * mm
)
style_h3 = ParagraphStyle(
    "H3", fontName=FONT_BOLD, fontSize=12, leading=18,
    textColor=HexColor("#388E3C"), spaceBefore=5 * mm, spaceAfter=2 * mm
)
style_body = ParagraphStyle(
    "BodyCN", fontName=FONT_NAME, fontSize=10.5, leading=18,
    alignment=TA_JUSTIFY, spaceAfter=2 * mm
)
style_note = ParagraphStyle(
    "Note", fontName=FONT_NAME, fontSize=9.5, leading=16,
    textColor=HexColor("#757575"), leftIndent=8 * mm, spaceAfter=2 * mm
)
style_toc = ParagraphStyle(
    "TOC", fontName=FONT_NAME, fontSize=12, leading=22,
    leftIndent=0, spaceAfter=1 * mm
)
style_toc_sub = ParagraphStyle(
    "TOCSub", fontName=FONT_NAME, fontSize=11, leading=20,
    leftIndent=10 * mm, spaceAfter=1 * mm
)

# ── 工具函数 ──────────────────────────────────────────────────
LQ = "\u300c"  # 左角括号
RQ = "\u300d"  # 右角括号

def heading1(text):
    return Paragraph(text, style_h1)

def heading2(text):
    return Paragraph(text, style_h2)

def heading3(text):
    return Paragraph(text, style_h3)

def body(text):
    return Paragraph(text, style_body)

def note(text):
    return Paragraph(text, style_note)

def hr():
    return HRFlowable(width="100%", thickness=0.5, color=BORDER_COLOR, spaceAfter=3 * mm)

def make_table(headers, rows, col_widths=None):
    data = [headers] + rows
    wrapped = []
    for i, row in enumerate(data):
        wrapped_row = []
        for cell in row:
            if i == 0:
                s = ParagraphStyle("th", fontName=FONT_BOLD, fontSize=10, leading=14,
                                   textColor=white, alignment=TA_CENTER)
            else:
                s = ParagraphStyle("td", fontName=FONT_NAME, fontSize=9.5, leading=14,
                                   alignment=TA_CENTER)
            wrapped_row.append(Paragraph(str(cell), s))
        wrapped.append(wrapped_row)

    t = Table(wrapped, colWidths=col_widths, repeatRows=1)
    style_cmds = [
        ("BACKGROUND", (0, 0), (-1, 0), TABLE_HEAD_BG),
        ("TEXTCOLOR", (0, 0), (-1, 0), white),
        ("ALIGN", (0, 0), (-1, -1), "CENTER"),
        ("VALIGN", (0, 0), (-1, -1), "MIDDLE"),
        ("GRID", (0, 0), (-1, -1), 0.5, BORDER_COLOR),
        ("TOPPADDING", (0, 0), (-1, -1), 4),
        ("BOTTOMPADDING", (0, 0), (-1, -1), 4),
        ("LEFTPADDING", (0, 0), (-1, -1), 6),
        ("RIGHTPADDING", (0, 0), (-1, -1), 6),
    ]
    for i in range(1, len(data)):
        if i % 2 == 0:
            style_cmds.append(("BACKGROUND", (0, i), (-1, i), TABLE_ALT_BG))
    t.setStyle(TableStyle(style_cmds))
    return t

# ── 构建文档 ──────────────────────────────────────────────────
OUTPUT = os.path.join(os.path.dirname(os.path.abspath(__file__)), "网关配置工具使用说明书.pdf")

doc = SimpleDocTemplate(
    OUTPUT, pagesize=A4,
    topMargin=20 * mm, bottomMargin=20 * mm,
    leftMargin=20 * mm, rightMargin=20 * mm
)

story = []

# ==================== 封面 ====================
story.append(Spacer(1, 50 * mm))
story.append(Paragraph("网关配置工具", style_title))
story.append(Paragraph("使用说明书", style_title))
story.append(Spacer(1, 15 * mm))
story.append(HRFlowable(width="60%", thickness=2, color=PRIMARY, spaceAfter=6 * mm))
story.append(Paragraph("适用于物联网网关设备的串口配置管理", style_subtitle))
story.append(Spacer(1, 10 * mm))

cover_info = [
    ["软件名称", "网关配置工具"],
    ["适用设备", "物联网网关"],
    ["通信接口", "串口（UART），波特率默认500000可修改"],
    ["运行环境", "Windows 7/10/11"],
    ["文档版本", "V1.0"],
]
cover_table = Table(cover_info, colWidths=[40 * mm, 90 * mm])
cover_table.setStyle(TableStyle([
    ("FONTNAME", (0, 0), (0, -1), FONT_BOLD),
    ("FONTNAME", (1, 0), (1, -1), FONT_NAME),
    ("FONTSIZE", (0, 0), (-1, -1), 11),
    ("TEXTCOLOR", (0, 0), (0, -1), PRIMARY),
    ("ALIGN", (0, 0), (0, -1), "RIGHT"),
    ("ALIGN", (1, 0), (1, -1), "LEFT"),
    ("VALIGN", (0, 0), (-1, -1), "MIDDLE"),
    ("TOPPADDING", (0, 0), (-1, -1), 6),
    ("BOTTOMPADDING", (0, 0), (-1, -1), 6),
    ("LEFTPADDING", (0, 0), (-1, -1), 8),
    ("RIGHTPADDING", (0, 0), (-1, -1), 8),
    ("LINEBELOW", (0, 0), (-1, -2), 0.3, BORDER_COLOR),
]))
story.append(cover_table)
story.append(PageBreak())

# ==================== 目录 ====================
story.append(heading1("目  录"))
story.append(hr())
toc_items = [
    ("1", "产品概述"),
    ("  1.1", "功能简介"),
    ("  1.2", "系统要求"),
    ("  1.3", "软件界面总览"),
    ("2", "快速入门"),
    ("  2.1", "连接设备"),
    ("  2.2", "查看网关配置"),
    ("3", "功能详解"),
    ("  3.1", "串口连接"),
    ("  3.2", "查看配置（para）"),
    ("  3.3", "Lora信道配置"),
    ("  3.4", "自定义指令"),
    ("  3.5", "通讯日志"),
    ("4", "指令参考"),
    ("5", "常见问题（FAQ）"),
    ("6", "注意事项"),
]
for num, title in toc_items:
    s = style_toc if not num.startswith(" ") else style_toc_sub
    story.append(Paragraph(f"{num}  {title}", s))
story.append(PageBreak())

# ==================== 1. 产品概述 ====================
story.append(heading1("1  产品概述"))
story.append(hr())

story.append(heading2("1.1  功能简介"))
story.append(body(
    f"网关配置工具是一款基于串口通信的物联网网关设备配置管理软件。通过本工具，用户可以方便地完成以下操作："
))
story.append(Spacer(1, 2 * mm))

features = [
    ["功能模块", "说明"],
    ["串口通信", "通过USB转串口连接网关设备，波特率默认500000可自行修改，实时收发指令"],
    ["配置读取", "一键读取网关全部参数，包括软件/硬件版本、MAC地址、电池状态、注册状态等"],
    ["Lora信道配置", "选择并设置Lora通信信道频率（470.1MHz ~ 492.6MHz）"],
    ["自定义指令", "支持手动输入任意指令与网关交互"],
    ["通讯日志", "实时显示发送和接收的通讯数据，便于调试"],
]
story.append(make_table(features[0], features[1:], col_widths=[35 * mm, 115 * mm]))
story.append(Spacer(1, 3 * mm))

story.append(heading2("1.2  系统要求"))
req_rows = [
    ["操作系统", "Windows 7 / 10 / 11（64位推荐）"],
    ["接口", "USB接口（用于连接USB转串口线）"],
    ["驱动", "USB转串口芯片驱动（如CH340/CP2102等）"],
    ["运行依赖", "无需安装Python环境，直接运行可执行文件"],
]
story.append(make_table(["项目", "要求"], req_rows, col_widths=[35 * mm, 115 * mm]))

story.append(heading2("1.3  软件界面总览"))
story.append(body("软件界面自上而下分为以下几个区域："))
ui_rows = [
    [f"{LQ}串口连接{RQ}区", "选择串口、刷新端口列表、打开/关闭串口"],
    [f"{LQ}参数配置{RQ}区", f"设置LoRa信道频率、{LQ}查看配置(para){RQ}、{LQ}设备升级{RQ}按钮"],
    [f"{LQ}设备参数信息{RQ}区", f"显示网关读取到的各项参数（版本、MAC、电池、注册状态等）"],
    [f"{LQ}通讯日志{RQ}区", f"实时显示收发数据（蓝色=发送，橙色=接收）"],
    [f"{LQ}自定义指令{RQ}区", f"手动输入任意指令发送"],
]
story.append(make_table(["区域", "功能说明"], ui_rows, col_widths=[35 * mm, 115 * mm]))

story.append(PageBreak())

# ==================== 2. 快速入门 ====================
story.append(heading1("2  快速入门"))
story.append(hr())

story.append(heading2("2.1  连接设备"))
story.append(body("按照以下步骤连接网关设备："))
steps = [
    "使用USB转串口线连接电脑与网关设备的调试串口；",
    "确认电脑已安装对应的USB转串口驱动；",
    f"启动{LQ}网关配置工具{RQ}软件；",
    f"在{LQ}串口连接{RQ}区域，点击<b>刷新</b>按钮，扫描可用串口；",
    "从下拉列表中选择对应的串口号（如COM3）；",
    "点击<b>打开串口</b>按钮，建立连接。",
]
for i, s in enumerate(steps, 1):
    story.append(Paragraph(f"<b>步骤{i}：</b>{s}", style_body))
story.append(Spacer(1, 2 * mm))
story.append(note(f"连接成功后，按钮变为红色{LQ}关闭串口{RQ}，状态栏显示已连接的串口号。"))

story.append(heading2("2.2  查看网关配置"))
story.append(body(
    f"串口连接成功后，点击<b>查看配置(para)</b>按钮，软件将自动向网关发送{LQ}para{RQ}指令，"
    f"网关返回配置信息后，界面各区域将自动更新显示当前参数值。"
))

story.append(PageBreak())

# ==================== 3. 功能详解 ====================
story.append(heading1("3  功能详解"))
story.append(hr())

# 3.1
story.append(heading2("3.1  串口连接"))
story.append(body("串口连接是使用本工具的前提。串口参数（波特率可修改，默认500000）："))
serial_rows = [
    ["波特率", "500000（可在下拉框中选择或手动输入）"],
    ["数据位", "8"],
    ["停止位", "1"],
    ["校验位", "None（无校验）"],
]
story.append(make_table(["参数", "值"], serial_rows, col_widths=[40 * mm, 60 * mm]))
story.append(Spacer(1, 2 * mm))
story.append(note("如无法连接，请检查串口驱动是否正确安装，以及串口是否被其他程序占用。"))

# 3.2
story.append(heading2("3.2  查看配置（para）"))
story.append(body(
    f"点击{LQ}查看配置(para){RQ}按钮后，软件发送{LQ}para{RQ}指令，网关返回包含以下信息的配置数据块："
))
para_rows = [
    ["软件版本", "SoftWare V", "网关固件版本号"],
    ["硬件版本", "HardWare V", "网关硬件版本号"],
    ["网关MAC", "GateWay MAC", "网关唯一MAC地址"],
    ["电池电量", "Battery", "当前电池电量"],
    ["注册状态", "MuchReg", "true=已注册，false/null=未注册"],
    ["通讯方式", "Much", "当前主通讯方式（eth/cat1/lora）"],
    ["Cat1 IMEI", "Cat1 IMEI", "4G模块IMEI号"],
    ["Cat1 SIM", "Cat1 SIM", "SIM卡信息"],
    ["Lora频率", "Lora fc", "当前Lora信道频率"],
]
story.append(make_table(["显示项", "指令关键字", "说明"], para_rows, col_widths=[30 * mm, 45 * mm, 75 * mm]))

# 3.3
story.append(heading2("3.3  Lora信道配置"))
story.append(body(
    "Lora信道配置用于设置网关的Lora无线通信频率。信道列表覆盖470.1MHz至492.6MHz范围，"
    "频率间隔0.5MHz，共46个信道可供选择。"
))
story.append(Spacer(1, 2 * mm))

story.append(heading3("操作步骤"))
lora_steps = [
    "在Lora信道下拉框中选择目标信道（显示信道编号和对应频率）；",
    f"点击<b>发送</b>按钮，发送{LQ}lora fc [频率值]{RQ}指令。",
]
for i, s in enumerate(lora_steps, 1):
    story.append(Paragraph(f"{i}. {s}", style_body))
story.append(Spacer(1, 2 * mm))

lora_range = [
    ["起始频率", "470.1 MHz（信道0）"],
    ["终止频率", "492.6 MHz（信道45）"],
    ["频率间隔", "0.5 MHz（500 kHz）"],
    ["指令格式", "lora fc [频率值，单位Hz]"],
]
story.append(make_table(["项目", "值"], lora_range, col_widths=[35 * mm, 115 * mm]))

# 3.4
story.append(heading2("3.4  自定义指令"))
story.append(body(
    "自定义指令区域允许用户手动输入任意指令与网关交互，适用于高级调试和特殊配置场景。"
))
story.append(Spacer(1, 2 * mm))

custom_steps = [
    "在指令输入框中输入要发送的指令文本；",
    "按<b>Enter</b>键或点击<b>发送</b>按钮发送指令；",
    "发送后输入框自动清空，回复数据将在通讯日志中显示。",
]
for i, s in enumerate(custom_steps, 1):
    story.append(Paragraph(f"{i}. {s}", style_body))

# 3.5
story.append(heading2("3.5  通讯日志"))
story.append(body("通讯日志区域实时显示与网关的通讯数据，采用深色背景方便阅读："))
log_rows = [
    ["蓝色文字", "发送的指令（&gt;&gt;&gt; 前缀）", "发送的指令内容"],
    ["橙色文字", "接收的数据（&lt;&lt;&lt; 前缀）", "网关返回的原始数据"],
]
story.append(make_table(["颜色", "类型", "说明"], log_rows, col_widths=[25 * mm, 45 * mm, 80 * mm]))
story.append(Spacer(1, 2 * mm))
story.append(note(f"点击{LQ}清空日志{RQ}按钮可清除当前日志内容。日志数据仅保留在内存中，关闭软件后自动清除。"))

story.append(PageBreak())

# ==================== 4. 指令参考 ====================
story.append(heading1("4  指令参考"))
story.append(hr())
story.append(body("以下为网关配置工具使用的全部指令汇总："))
story.append(Spacer(1, 2 * mm))

cmd_rows = [
    ["para", "读取网关全部配置参数", "查看配置(para)"],
    ["lora fc &lt;频率&gt;", "设置Lora信道频率(Hz)", "Lora信道配置"],
]
story.append(make_table(
    ["指令格式", "功能说明", "对应操作"],
    cmd_rows, col_widths=[42 * mm, 58 * mm, 50 * mm]
))
story.append(Spacer(1, 3 * mm))
story.append(note("所有指令以回车换行(\\r\\n)结尾。自定义指令区域可发送以上指令及网关支持的其他指令。"))

story.append(PageBreak())

# ==================== 5. 常见问题 ====================
story.append(heading1("5  常见问题（FAQ）"))
story.append(hr())

faqs = [
    ("Q1：打开串口失败怎么办？",
     "1）检查USB转串口线是否正确连接；2）确认串口驱动已安装（设备管理器中可见COM口）；"
     f"3）确认该串口未被其他程序占用；4）尝试点击{LQ}刷新{RQ}重新扫描串口列表。"),
    ("Q2：发送指令后没有回复？",
     f"1）确认串口已成功打开（按钮显示红色{LQ}关闭串口{RQ}）；2）检查串口线RX/TX是否接反；"
     "3）确认网关设备已上电且正常运行；4）尝试重新连接串口。"),
    ("Q3：Lora信道列表很长，如何快速选择？",
     "Lora信道下拉框支持鼠标滚轮滚动选择，也可以点击下拉后直接滚动浏览。"
     "信道编号和频率一一对应，选择后点击发送即可。"),
]
for q, a in faqs:
    story.append(Paragraph(f"<b>{q}</b>", style_body))
    story.append(Paragraph(f"\u3000\u3000{a}", style_body))
    story.append(Spacer(1, 2 * mm))

story.append(PageBreak())

# ==================== 6. 注意事项 ====================
story.append(heading1("6  注意事项"))
story.append(hr())

warnings = [
    "<b>串口独占：</b>同一串口在同一时间只能被一个程序打开，请确保使用前关闭其他可能占用串口的软件。",
    "<b>波特率：</b>波特率默认500000，可在下拉框选择或手动输入修改，请与网关固件实际波特率保持一致。",
    f"<b>数据备份：</b>修改配置前建议先通过{LQ}查看配置{RQ}记录当前参数，以便需要时恢复。",
    "<b>断电保护：</b>配置修改后请确认网关已保存参数，避免在参数写入过程中断电。",
    "<b>驱动安装：</b>首次使用需安装USB转串口芯片驱动（如CH340、CP2102等），具体型号取决于使用的转接线。",
]
for w in warnings:
    story.append(Paragraph(f"\u26a0 {w}", style_body))
    story.append(Spacer(1, 1 * mm))

story.append(Spacer(1, 20 * mm))
story.append(hr())
story.append(Paragraph("\u2014 文档结束 \u2014", ParagraphStyle(
    "End", fontName=FONT_NAME, fontSize=10, alignment=TA_CENTER,
    textColor=HexColor("#9E9E9E")
)))

# ── 生成PDF ──────────────────────────────────────────────────
doc.build(story)
print(f"PDF已生成: {OUTPUT}")