#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
工具运行配置: 运行目录定位 / filmforge_gui.json(串口记忆 + 监视设置)
================================================================
PyInstaller onefile 打包后 __file__ 指向临时解压目录,
配置必须落在 exe 旁边, 故 frozen 时改用 sys.executable 定位。
"""

import json
import os
import sys

import filmforge_rs485

if getattr(sys, 'frozen', False):
    BASE_DIR = os.path.dirname(os.path.abspath(sys.executable))
else:
    BASE_DIR = os.path.dirname(os.path.abspath(__file__))
SETTINGS_FILE = os.path.join(BASE_DIR, 'filmforge_gui.json')
LOG_DIR = os.path.join(BASE_DIR, 'logs')

# 曲线时间窗候选(秒): 下拉框文案 -> 秒
WINDOW_OPTIONS = (('2 分钟', 120), ('5 分钟', 300), ('15 分钟', 900),
                  ('60 分钟', 3600), ('全部', 0))
DEFAULT_WINDOW_SEC = 300
MAX_SAMPLES = 200000          # 曲线内存上限(点), 超出丢最旧; 10Hz 下约 5.5 小时

# 串口记忆(协议固定 115200-8-N-1, 仍允许改以便调试)
SERIAL_CFG = {'port': '', 'baud': filmforge_rs485.DEFAULT_BAUD,
              'bytesize': 8, 'parity': 'N', 'stopbits': 1}
REPORT_MS = 500               # 上报间隔输入框默认值
WINDOW_SEC = DEFAULT_WINDOW_SEC
THEME = 'System'
Y_MODE = 'auto'               # 曲线 Y 轴(温度轴): 'auto'=自适应 / 'manual'=固定范围
Y_MIN = None                  # 手动 Y 轴上下限(℃), 仅 Y_MODE='manual' 且合法时生效
Y_MAX = None


def load_settings():
    """读 filmforge_gui.json(缺失/损坏按默认值), 更新模块级默认字典"""
    try:
        with open(SETTINGS_FILE, encoding='utf-8') as f:
            data = json.load(f)
    except Exception:
        return
    if not isinstance(data, dict):
        return
    ser = data.get('serial')
    if isinstance(ser, dict):
        SERIAL_CFG['port'] = str(ser.get('port') or '')
        try:
            SERIAL_CFG['baud'] = int(ser.get('baud') or filmforge_rs485.DEFAULT_BAUD)
        except (TypeError, ValueError):
            pass
        try:
            SERIAL_CFG['bytesize'] = int(ser.get('bytesize') or 8)
        except (TypeError, ValueError):
            pass
        SERIAL_CFG['parity'] = str(ser.get('parity') or 'N').upper()[:1]
        try:
            SERIAL_CFG['stopbits'] = int(ser.get('stopbits') or 1)
        except (TypeError, ValueError):
            pass
    for key, target in (('report_ms', 'REPORT_MS'), ('window_sec', 'WINDOW_SEC')):
        try:
            globals()[target] = int(data.get(key))
        except (TypeError, ValueError):
            pass
    global THEME
    theme = str(data.get('theme') or '')
    if theme in ('Dark', 'Light', 'System'):
        THEME = theme
    ax = data.get('y_axis')
    if isinstance(ax, dict):
        mode = str(ax.get('mode') or '')
        if mode in ('auto', 'manual'):
            globals()['Y_MODE'] = mode
        try:
            globals()['Y_MIN'] = round(float(ax.get('min')), 2)
        except (TypeError, ValueError):
            pass
        try:
            globals()['Y_MAX'] = round(float(ax.get('max')), 2)
        except (TypeError, ValueError):
            pass


def save_settings():
    """写出全部设置(始终写全键)"""
    data = {
        'serial': dict(SERIAL_CFG),
        'report_ms': REPORT_MS,
        'window_sec': WINDOW_SEC,
        'theme': THEME,
        'y_axis': {'mode': Y_MODE, 'min': Y_MIN, 'max': Y_MAX},
    }
    try:
        with open(SETTINGS_FILE, 'w', encoding='utf-8') as f:
            json.dump(data, f, ensure_ascii=False, indent=2)
    except OSError:
        pass                    # 只读目录(exe 旁)下静默放弃, 不影响运行