#!/usr/bin/env
# -*- coding: utf-8 -*-
import sys
import math
import argparse
from qgis.core import *
from qgis.gui import *
from qgis.PyQt.QtGui import *
from qgis.PyQt.QtCore import *
from qgis.PyQt.QtWidgets import *
from qgis.PyQt.QtXml import *


# 获取参数
def getArgs():
    argv = sys.argv[1:]
    print("argv = ", argv)
    parser = argparse.ArgumentParser(description='ArgUtils')
    parser.add_argument("-qgz", type=str, default="Test.qgz", required=False)
    parser.add_argument("-qpt", type=str, default="Test.qpt", required=False)

    return parser.parse_args()


# 设置图层可用性
def setLayersValid(project, showLayers):
    for layer in project.mapLayers().values():
        flag = layer.name() in showLayers
        print(layer.name() + ": " + str(flag))
        # if not flag:
        # project.removeMapLayer(layer)
        layer.setValid(flag)


# 设置图层可见性
def setItemVisibility(root, showLayers):
    print(root.name() + ': Group')
    for node in root.children():
        # QgsLayerTreeLayer
        if isinstance(node, QgsLayerTreeGroup):
            setItemVisibility(node, showLayers)
        # QgsRasterLayer, QgsVectorLayer
        else:
            name = node.layer().name()
            flag = name in showLayers
            print(name + ": " + str(flag))
            # if not flag:
            # root.removeLayer(node.layer())
            # node.layer().setValid(False)
            node.setItemVisibilityChecked(flag)


# QgsApplication.setPrefixPath(r"E:/terrait/TianJin/LFServer/QGIS/", True)
qgs = QgsApplication([], True)
qgs.initQgis()

args = getArgs()
project = QgsProject.instance()
# project.read(r'Test.qgz')
project.read(args.qgz)
print("FileName: " + project.fileName())

# layout = QgsPrintLayout(project)
layout = QgsLayout(project)
# layout.initializeDefaults()

# with open(r'Test.qpt', 'r', encoding='utf-8') as f:
with open(args.qpt, 'r', encoding='utf-8') as f:
    template_content = f.read()
doc = QDomDocument()
doc.setContent(template_content)
layout.loadFromTemplate(doc, QgsReadWriteContext(), True)

# map = layout.itemById(r'地图')
map = layout.referenceMap()
print('1:' + str(math.ceil(map.scale())))

# "阀室", "站场", "管道中心线", "矢量注记", "矢量图", "高德影像注记", "高德影像", "影像注记", "影像图"
# showLayers = ["阀室", "管道中心线", "矢量注记", "矢量图"]
showLayers = layout.customProperty("layers").split(',')
root = project.layerTreeRoot()
# setLayersValid(project, showLayers)
setItemVisibility(root, showLayers)

layout.refresh()
map.refresh()

exporter = QgsLayoutExporter(layout)
# img_path = os.path.join(r"E:/terrait/TianJin/LFServer/QGIS", "render.png")
img_path = layout.customProperty("imgPath")
exporter.exportToImage(img_path, QgsLayoutExporter.ImageExportSettings())

qgs.exitQgis()