#!/usr/bin/python
# -*- coding: UTF-8 -*-

# GET me using a web browser,
# executing my code with a Python interpreter called by a CGI-compliant webserver!
# Example URI:
#   http://www.example.org/path/main.py?format=format&title=title&author=author
# where:
#   format:
#       choose output format. Can be either `json` or `html` (default)
#   title:
#       title of the book to filter (optional)
#   author:
#       author of the book to filter (optional)
#
#   Every parameter is optional.
#   Please note that not providing filters results in all books in the library.

# Useful libraries (no pun intended)
import xml.etree.ElementTree as ET
import json
import sys
import cgitb, cgi

# Our custom library (again no pun intended)
import tcparser

# Start CGI handling for webserver
cgitb.enable()
inputvars = cgi.FieldStorage()

# Detect desired format
try:
    format = inputvars['format'].value
except KeyError:
    format = 'html'

if format == 'html':
    print('Content-Type: text/html; charset=utf-8')
else:
    print('Content-Type: text/json; charset=utf-8')

print()

### End of HTTP headers:  it is now safe to output things
##########################################################

# Get a Python-friendly library struct
library = tcparser.getLibrary('input/tellico.xml')

### Get filters to search for books ###
try:
    title = inputvars['title'].value
except KeyError:
    title = ''

try:
    author = inputvars['author'].value
except KeyError:
    author = ''


result = tcparser.filter(library, title=title, author=author)

if format == 'html':
    html = tcparser.getHTML(result)
    ET.dump(html)
if format == 'json':
    # Wanna get a pretty JSON encoded library to do your nasty things offline at home? ;-)
    print(json.dumps(result, indent=4))