#!/usr/bin/env python

import sys
import time

import numpy as np

from optparse import OptionParser

import progressbar

import interp.bootstrap
interp.bootstrap

from interp.grid.gmsh import ggrid
from interp.grid.delaunay import dgrid
from interp.tools import improved_answer
from interp.tools import baker_exact_2D, baker_exact_3D
from interp.tools import friendly_exact_2D, friendly_exact_3D
from interp.tools import exact_me


def get_right_exact_func(options):
    f = None
    if options.dimension == 3:
        if options.baker:
            f = baker_exact_3D
        else:
            f = friendly_exact_3D
    elif options.dimension == 2:
        if options.baker:
            f = baker_exact_2D
        else:
            f = friendly_exact_2D
    return f

if __name__ == '__main__':

    parser = OptionParser(usage="%prog [options] <input file (gmsh) or random"
                            " grid count (delaunay)> <number of attempts>")

    parser.add_option("-b", "--baker",
        action="store_true", dest="baker", default=False,
        help="use more impressive baker funcs")

    meshtype_options = ('gmsh', 'delaunay')
    parser.add_option('-t', '--type',
        type="str", dest="meshtype", default='delaunay',
        help="specify mesh type (default: %default, options gmsh, delaunay)")

    parser.add_option("-d", "--dimension",
        type="int", dest="dimension", default=3,
        help="use 3D or 2D gmsh lib (default: %default)")

    parser.add_option("-o", "--order",
        type="int", dest="order", default=3,
        help="order of interpolation (default: %default)")

    parser.add_option("-e", "--extra-points",
        type="int", dest="extra", default=3,
        help="number of extra points (default: %default)")

    (options, args) = parser.parse_args()

    if len(args) != 2:
        parser.print_usage()
        sys.exit(1)

    input_file, count = args
    count = int(count)

    if options.meshtype == 'gmsh':
        g = ggrid(input_file, options.dimension)
        g.values = exact_me(g.points, get_right_exact_func(options))
    elif options.meshtype == 'delaunay':
        point_count = int(input_file)
        v = np.random.random((point_count, options.dimension))
        q = exact_me(v, get_right_exact_func(options))
        g = dgrid(v, q)
    else:
        raise Exception("improper mesh type specified. options: %s\n%s".format(
                             str(meshtype_options), options.meshtype))

    results = {True: 0, False: 0}
    i = 0
    outside = 0
    pbar = progressbar.ProgressBar().start()
    start = time.time()
    while i < count:
        try:
            X = np.random.rand(1, options.dimension)[0]

            a = g.interpolate(X, order=options.order,
                                extra_points=options.extra)
            e = get_right_exact_func(options)(X)

            results[improved_answer(a, e)] += 1
            update = i / float(count) * 100
            pbar.update(update)
            i += 1
        except Exception as e:
            # print e
            # print X, i, count
            outside += 1

    pbar.finish()
    end = time.time()
    print "total skipped points: %d" % outside
    print results, end - start