#!/usr/bin/env python3
# -*- Coding: UTF-8 -*-

# ---------------------------------------------------------------------------
# Open Asset Import Library (ASSIMP)
# ---------------------------------------------------------------------------
#
# Copyright (c) 2006-2010, ASSIMP Development Team
#
# All rights reserved.
#
# Redistribution and use of this software in source and binary forms, 
# with or without modification, are permitted provided that the following 
# conditions are met:
# 
# * Redistributions of source code must retain the above
#   copyright notice, this list of conditions and the
#   following disclaimer.
# 
# * 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.
# 
# * Neither the name of the ASSIMP team, nor the names of its
#   contributors may be used to endorse or promote products
#   derived from this software without specific prior
#   written permission of the ASSIMP Development Team.
# 
# 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 
# OWNER 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.
# ---------------------------------------------------------------------------

"""
Generate the regression database db.zip from the files in the <root>/test/models
directory. Older databases are overwritten with no prompt but can be restored
using Git as needed.

Use --help for usage.

On Windows, use ``py run.py <arguments>`` to make sure command line parameters
are forwarded to the script.
"""

import sys
import os
import subprocess
import zipfile

import settings
import utils

usage = """gen_db [assimp_binary] [-i=...] [-e=...] [-p] [-n]

The assimp_cmd (or assimp) binary to use is specified by the first
command line argument and defaults to ``assimp``.

To build, set ``ASSIMP_BUILD_ASSIMP_TOOLS=ON`` in CMake. If generating
configs for an IDE, make sure to build the assimp_cmd project.

-i,--include: List of file extensions to update dumps for. If omitted,
         all file extensions are updated except those in `exclude`.

-e,--exclude: Merged with settings.exclude_extensions to produce a
         list of all file extensions to ignore. If dumps exist,
         they are not altered. If not, theu are not created.

-p,--preview: Preview list of file extensions touched by the update.
         Dont' change anything.

-n,--nozip: Don't pack to ZIP archive. Keep all dumps in individual files.

(lists of file extensions are comma delimited, i.e. `3ds,lwo,x`)
"""

# -------------------------------------------------------------------------------
def process_dir(d, outfile, file_filter):
    """ Generate small dump records for all files in 'd' """
    print("Processing directory " + d)

    num = 0
    for f in os.listdir(d):
        fullp = os.path.join(d, f)
        if os.path.isdir(fullp) and not f == ".svn":
            num += process_dir(fullp, outfile, file_filter)
            continue

        if file_filter(f):
            for pp in settings.pp_configs_to_test:
                num += 1
                print("DUMP " + fullp + "\n post-processing: " + pp)
                outf = os.path.join(os.getcwd(), settings.database_name,
                    utils.hashing(fullp, pp))

                cmd = [ assimp_bin_path, "dump", fullp, outf, "-b", "-s", "-l" ] + pp.split()
                outfile.write("assimp dump "+"-"*80+"\n")
                outfile.flush()
                if subprocess.call(cmd, stdout=outfile, stderr=outfile, shell=False):
                    print("Failure processing " + fullp)

                    # spit out an empty file to indicate that this failure is expected
                    with open(outf,'wb') as f:
                        pass
    return num
                    

# -------------------------------------------------------------------------------
def make_zip():
    """Zip the contents of ./<settings.database_name>
    to <settings.database_name>.zip using DEFLATE
    compression to minimize the file size. """

    num = 0
    zipout = zipfile.ZipFile(settings.database_name + ".zip", "w", zipfile.ZIP_DEFLATED)
    for f in os.listdir(settings.database_name):
        p = os.path.join(settings.database_name, f)
        zipout.write(p, f)
        if settings.remove_old:
            os.remove(p)

        num += 1

    if settings.remove_old:
        os.rmdir(settings.database_name)

    bad = zipout.testzip()
    assert bad is None

    print("="*60)
    print("Database contains {0} entries".format(num))


# -------------------------------------------------------------------------------
def extract_zip():
    """Unzip <settings.database_name>.zip to
    ./<settings.database_name>"""
    try:
        zipout = zipfile.ZipFile(settings.database_name + ".zip", "r", 0)
        zipout.extractall(path=settings.database_name)
    except (RuntimeError,IOError) as r:
        print(r)
        print("failed to extract previous ZIP contents. "\
              "DB is generated from scratch.")
        

# -------------------------------------------------------------------------------
def gen_db(ext_list,outfile):
    """Generate the crash dump database in
    ./<settings.database_name>"""
    try:
        os.mkdir(settings.database_name)
    except OSError:
        pass

    num = 0
    for tp in settings.model_directories:
        num += process_dir(tp, outfile,
            lambda x: os.path.splitext(x)[1].lower() in ext_list and not x in settings.files_to_ignore)

    print("="*60)
    print("Updated {0} entries".format(num))
        

# -------------------------------------------------------------------------------
if __name__ == "__main__":
    assimp_bin_path = sys.argv[1] if len(sys.argv) > 1 else 'assimp'

    def clean(f):
        f = f.strip("* \'")
        return "."+f if f[:1] != '.' else f

    if len(sys.argv)>1 and (sys.argv[1] == "--help" or sys.argv[1] == "-h"):
        print(usage)
        sys.exit(0)

    ext_list, preview, nozip = None, False, False
    for m in sys.argv[1:]:
        if m[:10]=="--exclude=":
            settings.exclude_extensions += map(clean, m[10:].split(","))
        elif m[:3]=="-e=":
            settings.exclude_extensions += map(clean, m[3:].split(","))
        elif m[:10]=="--include=":
            ext_list = m[10:].split(",")
        elif m[:3]=="-i=":
            ext_list = m[3:].split(",")
        elif m=="-p" or m == "--preview":
            preview = True
        elif m=="-n" or m == "--nozip":
            nozip = True
            
    outfile = open(os.path.join("..", "results", "gen_regression_db_output.txt"), "w")
    if ext_list is None:
        (ext_list, err) = subprocess.Popen([assimp_bin_path, "listext"],
            stdout=subprocess.PIPE).communicate()
        ext_list = str(ext_list.strip()).lower().split(";")

    # todo: Fix for multi dot extensions like .skeleton.xml
    ext_list = list(filter(lambda f: not f in settings.exclude_extensions,
        map(clean, ext_list)))

    if preview:
        print(','.join(ext_list))
        sys.exit(1)

    extract_zip()    
    gen_db(ext_list,outfile)
    make_zip()

    print("="*60)
    input("Press any key to continue")
    sys.exit(0)
    
# vim: ai ts=4 sts=4 et sw=4