# -*- coding: utf-8 -*-

 '''

 Author: HermionX

 source:https://github.com/HermioneX

 '''

 import numpy as np

 import xarray as xr

 import os

 import datetime

 from mpl_toolkits.basemap import Basemap

 import matplotlib

 matplotlib.use("Agg")

 import matplotlib.pyplot as plt

 from matplotlib.patches import Polygon

 import matplotlib.patches as mpatches

 import matplotlib.colors as colors

 plt.rcParams['font.sans-serif']=['simhei']

 plt.rcParams['axes.unicode_minus'] = False

 defaultencoding = 'utf-8'

 def plot1pic(src_fn,out_fn,start_str,cnt_str):

     print(src_fn)

     ds = xr.open_dataset(src_fn)

     t =  ds['value']*100

     t.data[t.data<20] = 0

     lons = ds.lon.data

     lats = ds.lat.data

     temp = xr.DataArray(t.data.T, coords=[lats,lons], dims=['latitude','longitude'])

     fig, ax = plt.subplots(figsize = (18,16))

     m = Basemap(projection='cyl',resolution='l',llcrnrlon=lons.min(),llcrnrlat=lats.min(),

             urcrnrlon=lons.max(),urcrnrlat=lats.max(),lon_0=120.,lat_0=90)

     Lon,Lat = np.meshgrid(lons[:],lats[:])

     X,Y = m(Lon,Lat)

     shp_info3 = m.readshapefile("./CHN_adm_shp/CHN_adm1",'states',drawbounds=True,linewidth = 0.4,zorder=10)

     short_state_names  =  {u"湖北":"Hubei",

                             u"北京":"Beijing",

                             u"上海":"Shanghai",

                             u"天津":"Tianjin",

                             u"重庆":"Chongqing",

                             u"香港":"Xianggang",

                           }

     printed_names = []

     for shapedict, state in zip(m.states_info, m.states):

         if shapedict['NAME_1'] not in short_state_names.values(): continue

         short_name = short_state_names.keys()[short_state_names.values().index(shapedict['NAME_1'])]

         if short_name in printed_names: continue

         x, y = np.median(np.array(state),axis=0)

         print(x,y)

         plt.text(x, y, short_name, ha="center")

         printed_names += [short_name] 

     cm = plt.cm.get_cmap('rainbow')

     print(np.min(t.data),np.max(t.data))

     cs=m.contourf(X,Y,t.data.T,cmap=cm)

     l = 0.95

     b = 0.23

     w = 0.02

     h = 1 - 2*b

     plt.title( start_str +'             ' +cnt_str,fontdict={'weight':'normal','size': 20},loc ='left')

     rect = [l,b,w,h]

     cbar_ax = fig.add_axes(rect)

     cbar = plt.colorbar(cs,orientation='vertical',cax =cbar_ax)

     cbar.ax.tick_params(labelsize = 16)

     font = {'family' : 'simhei',

         'color'  : 'black',

         'weight' : 'normal',

         'size'   : 16,

         }

     cbar.set_label(u'(%)' ,fontdict=font) #设置colorbar的标签字体及其大小

     plt.savefig(out_fn,bbox_inches = 'tight')