#!/usr/bin/python
# -*- coding: utf-8 -*-
# =================================================================
#
# Authors: Tom Kralidis <tomkralidis@gmail.com>
#          Angelos Tzotsos <tzotsos@gmail.com>
#
# Copyright (c) 2015 Tom Kralidis
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use,
# copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following
# conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
# =================================================================

import configparser
import getopt
import logging
import sys

from pycsw.core import admin, config

CONTEXT = config.StaticContext()


def usage():
    """Provide usage instructions"""
    return '''
NAME
    pycsw-admin.py - pycsw admin utility

SYNOPSIS
    pycsw-admin.py -c <command> -f <cfg> [-h] [-p /path/to/records] [-r]

    Available options:

    -c    Command to be performed:
              - setup_db
              - load_records
              - export_records
              - rebuild_db_indexes
              - optimize_db
              - refresh_harvested_records
              - gen_sitemap
              - post_xml
              - get_sysprof
              - validate_xml
              - delete_records

    -f    Filepath to pycsw configuration

    -h    Usage message

    -l    Logging level (ERROR, WARNING, INFO, DEBUG)

    -o    path to output file

    -p    path to input/output directory or file to read/write metadata records

    -r    load records from directory recursively

    -s    XML Schema

    -t    Timeout (in seconds) for HTTP requests (default is 30)

    -u    URL of CSW

    -x    XML document

    -y    force confirmation


EXAMPLES

    1.) setup_db: Creates repository tables and indexes

        pycsw-admin.py -c setup_db -f default.cfg
        
    2.) load_records: Loads metadata records from directory or file into repository

        pycsw-admin.py -c load_records -p /path/to/records -f default.cfg

        Load records from directory recursively

        pycsw-admin.py -c load_records -p /path/to/records -f default.cfg -r

        Load records from directory and force updates

        pycsw-admin.py -c load_records -p /path/to/records -f default.cfg -y

        Load metadata record from file into repository

        pycsw-admin.py -c load_records -p /path/to/file.xml -f default.cfg

        Load metadata record from file into repository with logging

        pycsw-admin.py -c load_records -p /path/to/file.xml -f default.cfg -l DEBUG

    3.) export_records: Dump metadata records from repository into directory

        pycsw-admin.py -c export_records -p /path/to/records -f default.cfg

    4.) rebuild_db_indexes: Rebuild repository database indexes

        pycsw-admin.py -c rebuild_db_indexes -f default.cfg

    5.) optimize_db: Optimize repository database

        pycsw-admin.py -c optimize_db -f default.cfg

    6.) refresh_harvested_records: Refresh repository records
        which have been harvested

        pycsw-admin.py -c refresh_harvested_records -f default.cfg

    7.) gen_sitemap: Generate XML Sitemap

        pycsw-admin.py -c gen_sitemap -f default.cfg -o /path/to/sitemap.xml

    8.) post_xml: Execute a CSW request via HTTP POST

        pycsw-admin.py -c post_xml -u http://host/csw -x /path/to/request.xml

    9.) get_sysprof: Get versions of dependencies

        pycsw-admin.py -c get_sysprof

   10.) validate_xml: Validate an XML document against an XML Schema

        pycsw-admin.py -c validate_xml -x file.xml -s file.xsd

   11.) delete_records: Deletes all records from repository

        pycsw-admin.py -c delete_records -f default.cfg

   12.) delete_records: Deletes all records from repository without prompting

        pycsw-admin.py -c delete_records -f default.cfg -y

'''

COMMAND = None
XML_DIRPATH = None
CFG = None
RECURSIVE = False
OUTPUT_FILE = None
CSW_URL = None
XML = None
XSD = None
TIMEOUT = 30
FORCE_CONFIRM = False
LOGGING = None

if len(sys.argv) == 1:
    print(usage())
    sys.exit(1)

try:
    OPTS, ARGS = getopt.getopt(sys.argv[1:], 'c:f:ho:l:p:ru:x:s:t:y')
except getopt.GetoptError as err:
    print('\nERROR: %s' % err)
    print(usage())
    sys.exit(2)

for o, a in OPTS:
    if o == '-c':
        COMMAND = a
    if o == '-f':
        CFG = a
    if o == '-l':
        LOGGING = a
    if o == '-o':
        OUTPUT_FILE = a
    if o == '-p':
        XML_DIRPATH = a
    if o == '-r':
        RECURSIVE = True
    if o == '-u':
        CSW_URL = a
    if o == '-x':
        XML = a
    if o == '-s':
        XSD = a
    if o == '-t':
        TIMEOUT = int(a)
    if o == '-h':  # dump help and exit
        print(usage())
        sys.exit(3)
    if o == '-y':
        FORCE_CONFIRM = True

if COMMAND is None:
    print('-c <command> is a required argument')
    sys.exit(4)

if COMMAND not in ['setup_db', 'load_records', 'export_records',
                   'rebuild_db_indexes', 'optimize_db',
                   'refresh_harvested_records', 'gen_sitemap',
                   'post_xml', 'get_sysprof',
                   'validate_xml', 'delete_records']:
    print('ERROR: invalid command name: %s' % COMMAND)
    sys.exit(5)

if LOGGING is not None and LOGGING not in ['ERROR', 'WARNING', 'INFO', 'DEBUG']:
    print('ERROR: invalid -l value (should be one of ERROR, WARNING, INFO, DEBUG)')
    sys.exit(13)

if CFG is None and COMMAND not in ['post_xml', 'get_sysprof', 'validate_xml']:
    print('ERROR: -f <cfg> is a required argument')
    sys.exit(6)

if COMMAND in ['load_records', 'export_records'] and XML_DIRPATH is None:
    print('ERROR: -p </path/to/records> is a required argument')
    sys.exit(7)

if COMMAND == 'gen_sitemap' and OUTPUT_FILE is None:
    print('ERROR: -o </path/to/sitemap.xml> is a required argument')
    sys.exit(8)

if COMMAND not in ['post_xml', 'get_sysprof', 'validate_xml']:
    CP = configparser.ConfigParser()
    with open(CFG) as f:
        CP.read_file(f)

    DATABASE = CP.get('repository', 'database')
    URL = CP.get('server', 'url')
    HOME = CP.get('server', 'home')
    METADATA = dict(CP.items('metadata:main'))
    try:
        TABLE = CP.get('repository', 'table')
    except configparser.NoOptionError:
        TABLE = 'records'

elif COMMAND not in ['get_sysprof', 'validate_xml']:
    if CSW_URL is None:
        print('ERROR: -u <http://host/csw> is a required argument')
        sys.exit(9)
    if XML is None:
        print('ERROR: -x /path/to/request.xml is a required argument')
        sys.exit(10)
elif COMMAND == 'validate_xml':
    if XML is None:
        print('ERROR: -x /path/to/file.xml is a required argument')
        sys.exit(11)
    if XSD is None:
        print('ERROR: -s /path/to/file.xsd is a required argument')
        sys.exit(12)

if LOGGING is not None:
    logging.basicConfig(stream=sys.stdout, level=getattr(logging, LOGGING))
if COMMAND == 'setup_db':
    try:
        admin.setup_db(DATABASE, TABLE, HOME)
    except Exception as err:
        print(err)
        print('ERROR: DB creation error.  Database tables already exist')
        print('Delete tables or database to reinitialize')
elif COMMAND == 'load_records':
    admin.load_records(CONTEXT, DATABASE, TABLE, XML_DIRPATH, RECURSIVE, FORCE_CONFIRM)
elif COMMAND == 'export_records':
    admin.export_records(CONTEXT, DATABASE, TABLE, XML_DIRPATH)
elif COMMAND == 'rebuild_db_indexes':
    admin.rebuild_db_indexes(DATABASE, TABLE)
elif COMMAND == 'optimize_db':
    admin.optimize_db(CONTEXT, DATABASE, TABLE)
elif COMMAND == 'refresh_harvested_records':
    admin.refresh_harvested_records(CONTEXT, DATABASE, TABLE, URL)
elif COMMAND == 'gen_sitemap':
    admin.gen_sitemap(CONTEXT, DATABASE, TABLE, URL, OUTPUT_FILE)
elif COMMAND == 'post_xml':
    print(admin.post_xml(CSW_URL, XML, TIMEOUT))
elif COMMAND == 'get_sysprof':
    print(admin.get_sysprof())
elif COMMAND == 'validate_xml':
    admin.validate_xml(XML, XSD)
elif COMMAND == 'delete_records':
    if not FORCE_CONFIRM:
        if input('This will delete all records! Continue? [Y/n] ') == 'Y':
            FORCE_CONFIRM = True
    if FORCE_CONFIRM:
        admin.delete_records(CONTEXT, DATABASE, TABLE)

print('Done')
