# Copyright (C) 2010 Google Inc. All rights reserved.
#
# Redistribution and use 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 Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# 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
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from datetime import datetime
import logging

from google.appengine.ext import db

from datastorefile import DataStoreFile


class TestFile(DataStoreFile):
    master = db.StringProperty()
    builder = db.StringProperty()
    test_type = db.StringProperty()

    @classmethod
    def delete_file(cls, key, master, builder, test_type, name, before, limit):
        if key:
            file = db.get(key)
            if not file:
                logging.warning("File not found, key: %s.", key)
                return 0

            file._delete_all()
            return 1

        files = cls.get_files(master, builder, test_type, name, before, load_data=False, limit=limit)
        if not files:
            logging.warning(
                "File not found, master: %s, builder: %s, test_type:%s, name: %s, before: %s.",
                master, builder, test_type, name, before)
            return 0

        for file in files:
            file._delete_all()

        return len(files)

    @classmethod
    def get_files(cls, master, builder, test_type, name, before=None, load_data=True, limit=1):
        query = TestFile.all()
        if master:
            query = query.filter("master =", master)
        if builder:
            query = query.filter("builder =", builder)
        if test_type:
            query = query.filter("test_type =", test_type)
        if name:
            query = query.filter("name =", name)
        if before:
            date = datetime.strptime(before, "%Y-%m-%dT%H:%M:%SZ")
            query = query.filter("date <", date)

        files = query.order("-date").fetch(limit)
        if load_data:
            for file in files:
                file.load_data()

        return files

    @classmethod
    def save_file(cls, file, data):
        file_information = "master: %s, builder: %s, test_type: %s, name: %s." % (file.master, file.builder, file.test_type, file.name)
        if file.save(data):
            status_string = "Saved file. %s" % file_information
            status_code = 200
        else:
            status_string = "Couldn't save file. %s" % file_information
            status_code = 500
        return status_string, status_code

    @classmethod
    def overwrite_or_add_file(cls, master, builder, test_type, name, data):
        files = TestFile.get_files(master, builder, test_type, name)
        if not files:
            return cls.add_file(master, builder, test_type, name, data)
        return cls.save_file(files[0], data)

    @classmethod
    def add_file(cls, master, builder, test_type, name, data):
        file = TestFile()
        file.master = master
        file.builder = builder
        file.test_type = test_type
        file.name = name
        return cls.save_file(file, data)

    def save(self, data):
        if not self.save_data(data):
            return False

        self.date = datetime.now()
        self.put()

        return True

    def _delete_all(self):
        self.delete_data()
        self.delete()