# Copyright (C) 2012 Balazs Ankes (bank@inf.u-szeged.hu) University of Szeged
#
# 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
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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"""Supports checking WebKit style in png files."""

import os
import re
import sys
from webkitpy.common.system.executive import Executive
from webkitpy.common.system.filesystem import FileSystem
from webkitpy.common.checkout.scm.detection import SCMDetector


class PNGChecker(object):
    """Check svn:mime-type for checking style"""

    categories = set(['image/png'])

    def __init__(self, file_path, handle_style_error, filesystem=None, scm=None, platform=None):
        self._file_path = file_path
        self._handle_style_error = handle_style_error
        self._fs = filesystem or FileSystem()
        self._detector = scm or SCMDetector(self._fs, Executive()).detect_scm_system(self._fs.getcwd())
        self._platform = platform or sys.platform

    def check(self, inline=None):
        errorstr = ""
        config_file_path = ""
        detection = self._detector.display_name()

        if detection == "git":
            config_file_path = self._config_file_path()
            there_is_enable_line = False
            there_is_png_line = False

            try:
                config_file = self._fs.read_text_file(config_file_path)
            except IOError:
                errorstr = "There is no " + config_file_path
                self._handle_style_error(0, 'image/png', 5, errorstr)
                return

            errorstr_autoprop = "Have to enable auto props in the subversion config file (" + config_file_path + " \"enable-auto-props = yes\"). "
            errorstr_png = "Have to set the svn:mime-type in the subversion config file (" + config_file_path + " \"*.png = svn:mime-type=image/png\")."

            for line in config_file.split('\n'):
                if not there_is_enable_line:
                    match = re.search("^\s*enable-auto-props\s*=\s*yes", line)
                    if match:
                        there_is_enable_line = True
                        errorstr_autoprop = ""
                        continue

                if not there_is_png_line:
                    match = re.search("^\s*\*\.png\s*=\s*svn:mime-type=image/png", line)
                    if match:
                        there_is_png_line = True
                        errorstr_png = ""
                        continue

            errorstr = errorstr_autoprop + errorstr_png
            if errorstr:
                self._handle_style_error(0, 'image/png', 5, errorstr)

        elif detection == "svn":
            prop_get = self._detector.propget("svn:mime-type", self._file_path)
            if prop_get != "image/png":
                errorstr = "Set the svn:mime-type property (svn propset svn:mime-type image/png " + self._file_path + ")."
                self._handle_style_error(0, 'image/png', 5, errorstr)

    def _config_file_path(self):
        config_file = ""
        if self._platform.startswith('linux') or self._platform.startswith('darwin'):
            config_file_path = self._fs.join(self._fs.expanduser("~"), ".subversion/config")
        elif self._platform.startswith('win') or self._platform.startswith('cygwin'):
            config_file_path = self._fs.join(os.environ['APPDATA'], "Subversion\config")
        return config_file_path