import basura
import mimetypes, os
from simplejson import dumps as tojson

def request(environ, response):
  path = environ['PATH_INFO']

  # at the root is a simple welcome
  if path == '/':
    response('200 OK')
    return tojson({"basura": "Welcome", "version": basura.VERSION})

  # serve static files
  if os.path.exists(os.path.join('static/', path[1:])):
    path = os.path.join('static/', path[1:])

    if os.path.isdir(path):
      response('403 Forbidden', [('Content-type','text/plain')])
      return "Directory Listing Denied\n"
      
    content_type = mimetypes.guess_type(path)[0] or 'text/plain'
    response('200 OK', [('Content-type',content_type)])

    data = open(path, 'rb')
    buffer = data.read()
    data.close()
    return buffer

  path = environ['PATH_INFO'].split('/',2)
  
  # /dbname or /dbname/
  if len(path) == 2 or not path[2]:
    db = basura.dbexists(path[1])
    if db != False:
      response('200 OK')
      return tojson({"db_name":path[1], "doc_count":len(db.keys())})
  
  db = basura.dbexists(path[1])

  # builtin view: _all_docs
  if db != False and path[2] == '_all_docs':
    rows = []
    for id, doc in db.iteritems():
      rows.append({"_id": id, "_rev": doc["_rev"]})
    response('200 OK')
    return tojson({"view":"_all_docs", "rows": rows})

  # simple fetch
  if db != False and db.has_key(path[2]):
    doc = db[path[2]]
    stat = basura.doccheck(db, path[2], environ, '200 OK')
    etag, lmod = basura.docstat(doc)

    response(stat, [('Etag', '"%s"' % etag), ('Last-Modified', lmod)]) 
    if stat == '200 OK': return tojson(doc)
    return ''

  # not found
  response('404 Not Found')
  return tojson({"error":{"id":"not_found","reason":"missing"}})