# -*- coding: utf-8 -*-
#
# common.py - part of the FDroid server tools
# Copyright (C) 2010, Ciaran Gultnieks, ciaran@ciarang.com
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import glob, os, sys, re

def parse_metadata(metafile, **kw):

    def parse_buildline(value):
        parts = [p.replace("\\,", ",")
                 for p in re.split(r"(?<!\\),", value)]
        if len(parts) < 3:
            print "Invalid build format: " + value + " in " + metafile.name
            sys.exit(1)
        thisbuild = {}
        thisbuild['version'] = parts[0]
        thisbuild['vercode'] = parts[1]
        thisbuild['commit'] = parts[2]
        for p in parts[3:]:
            pk, pv = p.split('=', 1)
            thisbuild[pk] = pv
        return thisbuild

    if not isinstance(metafile, file):
        metafile = open(metafile, "r")
    thisinfo = {}
    thisinfo['id'] = metafile.name[9:-4]
    if kw.get("verbose", False):
        print "Reading metadata for " + thisinfo['id']
    thisinfo['description'] = ''
    thisinfo['name'] = None
    thisinfo['summary'] = ''
    thisinfo['license'] = 'Unknown'
    thisinfo['web'] = ''
    thisinfo['source'] = ''
    thisinfo['tracker'] = ''
    thisinfo['donate'] = None
    thisinfo['disabled'] = None
    thisinfo['antifeatures'] = None
    thisinfo['marketversion'] = ''
    thisinfo['marketvercode'] = '0'
    thisinfo['repotype'] = ''
    thisinfo['repo'] = ''
    thisinfo['builds'] = []
    thisinfo['usebuilt'] = False
    thisinfo['requiresroot'] = False
    mode = 0
    buildline = []
    for line in metafile:
        line = line.rstrip('\r\n')
        if line.startswith("#"):
            continue
        if mode == 0:
            if len(line) == 0:
                continue
            index = line.find(':')
            if index == -1:
                print "Invalid metadata in " + metafile.name + " at: " + line
                sys.exit(1)
            field = line[:index]
            value = line[index+1:]
            if field == 'Description':
                mode = 1
            elif field == 'Name':
                thisinfo['name'] = value
            elif field == 'Summary':
                thisinfo['summary'] = value
            elif field == 'Source Code':
                thisinfo['source'] = value
            elif field == 'License':
                thisinfo['license'] = value
            elif field == 'Web Site':
                thisinfo['web'] = value
            elif field == 'Issue Tracker':
                thisinfo['tracker'] = value
            elif field == 'Donate':
                thisinfo['donate'] = value
            elif field == 'Disabled':
                thisinfo['disabled'] = value
            elif field == 'AntiFeatures':
                parts = value.split(",")
                for part in parts:
                    if (part != "Ads" and
                        part != "Tracking" and
                        part != "NonFreeNet" and
                        part != "NonFreeAdd"):
                        print "Unrecognised antifeature '" + part + "' in " \
                            + metafile.name
                        sys.exit(1)
                thisinfo['antifeatures'] = value
            elif field == 'Market Version':
                thisinfo['marketversion'] = value
            elif field == 'Market Version Code':
                thisinfo['marketvercode'] = value
            elif field == 'Repo Type':
                thisinfo['repotype'] = value
            elif field == 'Repo':
                thisinfo['repo'] = value
            elif field == 'Build Version':
                if value.endswith("\\"):
                    mode = 2
                    buildline = [value[:-1]]
                else:
                    thisinfo['builds'].append(parse_buildline(value))
            elif field == "Use Built":
                if value == "Yes":
                    thisinfo['usebuilt'] = True
            elif field == "Requires Root":
                if value == "Yes":
                    thisinfo['requiresroot'] = True
            else:
                print "Unrecognised field " + field + " in " + metafile.name
                sys.exit(1)
        elif mode == 1:       # multi-line description
            if line == '.':
                mode = 0
            else:
                if len(line) == 0:
                    thisinfo['description'] += '\n\n'
                else:
                    if (not thisinfo['description'].endswith('\n') and
                        len(thisinfo['description']) > 0):
                        thisinfo['description'] += ' '
                    thisinfo['description'] += line
        elif mode == 2:       # line continuation
            if line.endswith("\\"):
                buildline.append(line[:-1])
            else:
                buildline.append(line)
                thisinfo['builds'].append(
                    parse_buildline("".join(buildline)))
                mode = 0
    if mode == 1:
        print "Description not terminated in " + metafile.name
        sys.exit(1)
    if len(thisinfo['description']) == 0:
        thisinfo['description'] = 'No description available'
    return thisinfo

def read_metadata(verbose=False):
    apps = []
    for metafile in glob.glob(os.path.join('metadata', '*.txt')):
        apps.append(parse_metadata(metafile, verbose=verbose))
    return apps