#! /usr/bin/env python

import sys
import getopt
from SchedulingAlgorithms import simanneal as sim
from Output import output as o


def usage():
    s=  """
Command line options:
    -h      show this help
    -p      activate pretty output (requires tkinter)
    -l      assume that a file contains multiple problems, default is only 1
    -i      index of the problem you want solved. has no effect without l
    -t      set parameter max_temp of simulated annealing
    -s      set parameter max_steps of simulated annealing
    -a      set parameter accept_prob of simulated annealing

Invocation:
    python [-hlp] file
"""
    return s


def main():
    js1 = False
    plot = False
    try:
        opts, args = getopt.getopt(sys.argv[1:], 'hpli:t:s:a:')
    except getopt.GetoptError as err:
        print(err)
        sys.exit()
    if ('-h', '') in opts:
        print(usage())
    if ('-p', '') in opts:
        print("Plotting enabled.")
        from Output import output as o
        plot = True
    if('-l', '') in opts:
        js1 = True
    idx = [int(x[1]) for x in opts if x[0]=='-i']   
    idx = idx[0] if idx else -1
    max_temp = [int(x[1]) for x in opts if x[0]=='-t']   
    max_temp = max_temp[0] if max_temp else -1
    max_steps = [int(x[1]) for x in opts if x[0]=='-s']   
    max_steps = max_steps[0] if max_steps else -1
    accept_prob = [int(x[1]) for x in opts if x[0]=='-a']   
    accept_prob = accept_prob[0] if accept_prob else -1
    if not args:
        print("No file given.")
        sys.exit()            
    else:
        infile = args[0]
    if js1:
        from Parser import js1_style as parser
    else:
        from Parser import js2_style as parser
    print("Parsing file: " + infile)
    problem = parser.parse_file(infile)
    if js1:
        print("File contains " + str(len(problem)) + " problems.")
        if idx == -1:
            idx = int(input("Which problem do you want so solve? [0-" + str(len(problem)-1) + "] "))
        problem = problem[idx]
    print(problem)
    sim.init(problem)
    if not max_temp == -1:
        if not max_steps == -1:
            if not accept_prob == -1:
                solution = sim.anneal(max_temp, max_steps, accept_prob)
            else:
                solution = sim.anneal(max_temp = max_temp, max_steps = max_steps)
        else:
            if not accept_prob == -1:
                solution = sim.anneal(max_temp = max_temp, accept_prob = accept_prob)
            else:
                solution = sim.anneal(max_temp = max_temp)
    else:
        if not max_steps == -1:
            if not accept_prob == -1:
                solution = sim.anneal(max_steps = max_steps, accept_prob = accept_prob)
            else:
                solution = sim.anneal(max_steps = max_steps)
        else:
            if not accept_prob == -1:
                solution = sim.anneal(accept_prob = accept_prob)
            else:
                solution = sim.anneal()
    print(solution)
    print(sim.rate(solution))
    if plot:
        o.create_plot(problem, solution)

if __name__ == "__main__":
    main()