import sys
import multiprocessing as MP
import queue
import ctypes
from math import floor
import click
from click_default_group import DefaultGroup
import requests as RQ
from ed_lrr_gui import Router
from ed_lrr_gui import Preprocessor
import ed_lrr_gui.gui as ED_LRR_GUI
CONTEXT_SETTINGS = dict(help_option_names=['-h', '--help'])

@click.group(invoke_without_command=True,context_settings=CONTEXT_SETTINGS)
@click.pass_context
def main(ctx):
    "Elite: Dangerous long range router, command line interface"
    if ctx.invoked_subcommand is None:
        ctx.invoke(gui)
        return
    return

@main.command()
@click.option("--debug",help="Debug print",is_flag=True)
def gui(debug):
    "Run the ED LRR GUI (default)"
    if not debug:
        ctypes.windll.kernel32.FreeConsole()
        sys.stdin=open("NUL","rt")
        sys.stdout=open("NUL","wt")
        sys.stderr=open("NUL","wt")
    sys.exit(ED_LRR_GUI.main())

@main.command()
@click.option("--url","-u",help="Base URL",default="https://www.edsm.net/dump/",show_default=True)
@click.option("--systems","-s",help="Target path for systemsWithCoordinates.json",default="systemsWithCoordinates.json",show_default=True)
@click.option("--bodies","-b",help="Target path for bodies.json",default="bodies.json",show_default=True)
def download(*args,**kwargs):
    "Download EDSM dumps"
    print("Download:",args,kwargs)
    click.pause()

@main.command()
def preprocess(*args,**kwargs):
    "Preprocess EDSM dumps"
    print("PreProcess:",ctx,args,kwargs)
    click.pause()


@main.command()
@click.option("--path","-i",required=True,metavar="<path>",help="Path to stars.csv",default="./stars.csv",type=click.Path(exists=True,dir_okay=False),show_default=True )
@click.option("--precomp_file","-pf",metavar="<path>",help="Precomputed routing graph to use",type=click.Path(exists=True,dir_okay=False))
@click.option("--range","-r",required=True,metavar="<float>",help="Jump range (Ly)",type=click.FloatRange(min=0))
@click.option("--prune","-d",default=(0,0),metavar="<n> <m>",help="Prune search branches",nargs=2,type=click.Tuple([click.IntRange(min=0),click.FloatRange(min=0)]))
@click.option("--permute","-p",type=click.Choice(["all","keep_first","keep_last","keep_both"]),default=None,help="Permute hops to find shortest route",show_default=True)
@click.option("--primary","-ps",is_flag=True,default=False,help="Only route through primary stars")
@click.option("--factor","-g",metavar="<float>",default=0.5,help="Greedyness factor for A-Star",show_default=True)
@click.option("--mode","-m",default="bfs",help="Search mode",type=click.Choice(["bfs","a-star","greedy"]),show_default=True)
@click.argument('systems',nargs=-1)
def route(**kwargs):
    "Compute a route"
    if kwargs['prune']==(0,0):
        kwargs['prune']=None
    def to_string(state):
        if state:
            return "[{}] {}".format(state['depth'],state['system'])
    keep_first,keep_last={
        "all":(False,False),
        "keep_first":(True,False),
        "keep_last":(False,True),
        "keep_both":(True,True),
        None: (False,False)
    }[kwargs['permute']]
    args=[kwargs['systems'],kwargs['range'],kwargs['prune'],kwargs['mode'],kwargs['primary'],kwargs['permute']!=None,keep_first,keep_last,kwargs['factor'],None,kwargs['path']]
    with click.progressbar(length=100,label="Computing route",show_percent=True,item_show_func=to_string,width=50) as pbar:
        router=Router(*args)
        router.start()
        state={}
        pstate={}
        while not (router.queue.empty() and router.is_alive()==False):
            try:
                event = router.queue.get(True,0.1)
                state.update(event)
                if state!=pstate:
                    pbar.current_item=state.get("status")
                    if pbar.current_item:
                        pbar.pos=floor(pbar.current_item["prc_done"]*10)/10
                        pbar.update(0)
                    pstate=state
            except queue.Empty:
                pass
        pbar.pos=100
        pbar.update(0)
    print(state.get("result"))
    print("DONE!")

@main.command()
@click.option("--path","-i",required=True,help="Path to stars.csv",default="./stars.csv",type=click.Path(exists=True,dir_okay=False),show_default=True )
@click.option("--precomp_file","-pc",help="Precomputed routing graph to use",type=click.Path(exists=True,dir_okay=False))
@click.option("--range","-r",required=True,help="Jump range (Ly)",type=click.FloatRange(min=0))
@click.option("--primary","-ps",help="Only route through primary stars")
@click.option("--output","-o",required=True,help="Output path",default="./stars.idx",type=click.Path(exists=False,dir_okay=False),show_default=True )
@click.argument('systems',nargs=-1)
def precompute(*args,**kwargs):
    "Precompute routing graph"
    print("PreComp:",ctx,args,kwargs)


if __name__ == '__main__':
    MP.freeze_support()
    main()