"""

flagmatic 2

Copyright (c) 2012, E. R. Vaughan. All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

1) Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.

2) Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

"""

from flagmatic.all import *

import cStringIO
import datetime
import os
import sys
import time
import traceback


class Tee:

    def __init__(self, *args):
        self.files = list(args)
        self.start_time = time.time()
        self.needs_stamp = False

    def write(self, text):
        if self.needs_stamp:
            ts = "[%s] " % datetime.timedelta(seconds=int(time.time() - self.start_time))
            for f in self.files:
                f.write(ts)
        for f in self.files:
            f.write(text)
        #self.needs_stamp = len(text) == 0 or text[-1] == "\n"

    def flush(self):
        for f in self.files:
            f.flush()


class Example:

    def __init__(self, name):

        problem = None
        construction = None

        base_filename = os.path.join("examples", name)
        with open(base_filename + ".sage", "r") as f:
            lines = f.readlines()

        # last line of file might not end in a newline
        if lines[-1][-1] != "\n":
            lines[-1] += "\n"
        lines.append('problem.write_certificate("' + base_filename + '.js")\n')
        lines.append('problem.save("' + base_filename + '")\n')

        buff = cStringIO.StringIO()
        saved_stdout = sys.stdout
        sys.stdout = Tee(sys.stdout, buff)

        for line in lines:
            sys.stdout.write("sage: %s" % line)
            try:
                exec(preparse(line))
            except:
                traceback.print_exc(None, sys.stdout)
                break

        sys.stdout = saved_stdout

        self.problem = problem
        self.construction = construction
        self.output = buff.getvalue()

        with open(base_filename + ".txt", "w") as f:
            f.write(self.output)