# -*- coding: utf-8 -*-

import cgi
import os
import sys

import patchtracker.Conf as Conf
from patchtracker.Templates import ErrorTemplate, LetterTocTemplate, FrontPageTemplate, SearchResultsTemplate
from patchtracker.CacheObject import CacheObject, CacheMissException
import patchtracker.DB as DB
from patchtracker.DB import PatchTrackerDB
import patchtracker.SourceArchive as SourceArchive

class ReqHandlerException(Exception):
  def __init__(self, msg, code="500 Oh noes"):
    Exception.__init__(self, msg)
    self.status=code

class Cmd:
  def __init__(self):
    self.content_type = 'text/html'
    self.status = "200 OK"

class ErrorCmd(Cmd):
  def __init__(self, msg, code="500 Oh noes"):
    Cmd.__init__(self)
    self.status = code
    self.msg = msg

  def output(self):
    return str(ErrorTemplate(self.msg))

class IndexCmd(Cmd):
  def __init__(self, args):
    Cmd.__init__(self)
    if len(args) < 1 or not len(args[0]):
      raise ReqHandlerException("please provide a letter on which to index")
    else:
      self.db = PatchTrackerDB()
      self.letter = args[0]
      self.toc = self.db.findLetterToc(self.letter)

  def output(self):
    return str(LetterTocTemplate(self.letter, self.toc))

class MaintCmd(Cmd):
  def __init__(self, args):
    Cmd.__init__(self)
    if len(args) < 1 or not len(args[0]):
      raise ReqHandlerException("please provide a email address on which to index")
    else:
      self.db = PatchTrackerDB()
      self.email = args[0]
      self.toc = self.db.findCollection(email=self.email)

  def output(self):
    return str(SearchResultsTemplate(self.email, "maintainer email", self.toc))

class JumpCmd(Cmd):
  def __init__(self, env):
    Cmd.__init__(self)
    form = cgi.FieldStorage(fp=env['wsgi.input'],environ=env)
    self.name = form.getfirst("package")
    self.uri = "%s/package/%s"%(Conf.root_url, self.name)
    self.status = "302 Try this other place kthx"

  def output(self):
    return ""

class FrontPageCmd(Cmd):
  def __init__(self):
    Cmd.__init__(self)
    self.db = PatchTrackerDB()
    self.index = self.db.findIndices()

  def output(self):
    return str(FrontPageTemplate(self.index))

class CmdHandler:
  def __init__(self, env):
    self.headers = []
    uri = Conf.root_url+env['PATH_INFO']
    self.cacheobj = None
    #print "Accept:",env['HTTP_ACCEPT']

    args = uri[len(Conf.root_url)+1:].split("/")
    cmdarg = args[0]
    cacheable = False
    if cmdarg == "index":
      self.cmd = IndexCmd(args[1:]) 
    elif cmdarg == "jump":
      self.cmd = JumpCmd(env) 
      self.headers.append( ('Location', self.cmd.uri) )
    elif cmdarg == "email":
      self.cmd = MaintCmd(args[1:]) 
    elif not len(cmdarg):
      self.cmd = FrontPageCmd()
    else:
      self.cmd = ErrorCmd("invalid command/location '%s'"%(cmdarg), "404 Not found")

    if Conf.caching and cacheable:
      self.cacheobj = CacheObject(key=uri)

    self.headers.append( ('Content-type', self.cmd.content_type) )
    self.status = self.cmd.status

  def output(self):
    result = None
    try:
      if self.cacheobj:
        result = self.cacheobj.get()
      else:
        result = self.cmd.output()
    except CacheMissException:
      result = self.cmd.output()
      self.cacheobj.put(result)

    return result

if __name__ == '__main__':
  fake_env = { 'PATH_INFO': sys.argv[1] }
  cmdh = CmdHandler(fake_env)
  print "Status: %s\nHeaders: %s"%(cmdh.status, cmdh.headers)
  print cmdh.output()