"""Methods for reporting bugs."""

import subprocess, sys, os

__all__ = ['ReportFailure', 'BugReport', 'getReporters']

#

class ReportFailure(Exception):
    """Generic exception for failures in bug reporting."""
    def __init__(self, value):        
        self.value = value

# Collect information about a bug.

class BugReport:
    def __init__(self, title, description, files):
        self.title = title
        self.description = description
        self.files = files

# Reporter interfaces.

import os

import email, mimetypes, smtplib
from email import encoders
from email.message import Message
from email.mime.base import MIMEBase
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText

class EmailReporter:
    def getName(self):
        return 'Email'

    def getParameterNames(self):
        return ['To', 'From', 'SMTP Server', 'SMTP Port']

    # Lifted from python email module examples.
    def attachFile(self, outer, path):
        # Guess the content type based on the file's extension.  Encoding
        # will be ignored, although we should check for simple things like
        # gzip'd or compressed files.
        ctype, encoding = mimetypes.guess_type(path)
        if ctype is None or encoding is not None:
            # No guess could be made, or the file is encoded (compressed), so
            # use a generic bag-of-bits type.
            ctype = 'application/octet-stream'
        maintype, subtype = ctype.split('/', 1)
        if maintype == 'text':
            fp = open(path)
            # Note: we should handle calculating the charset
            msg = MIMEText(fp.read(), _subtype=subtype)
            fp.close()
        else:
            fp = open(path, 'rb')
            msg = MIMEBase(maintype, subtype)
            msg.set_payload(fp.read())
            fp.close()
            # Encode the payload using Base64
            encoders.encode_base64(msg)
        # Set the filename parameter
        msg.add_header('Content-Disposition', 'attachment', filename=os.path.basename(path))
        outer.attach(msg)

    def fileReport(self, report, parameters):
        mainMsg = """\
BUG REPORT
---
Title: %s
Description: %s
"""%(report.title, report.description)

        if not parameters.get('To'):
            raise ReportFailure('No "To" address specified.')
        if not parameters.get('From'):
            raise ReportFailure('No "From" address specified.')

        msg = MIMEMultipart()
        msg['Subject'] = 'BUG REPORT: %s'%(report.title)
        # FIXME: Get config parameters
        msg['To'] = parameters.get('To')
        msg['From'] = parameters.get('From')
        msg.preamble = mainMsg

        msg.attach(MIMEText(mainMsg, _subtype='text/plain'))
        for file in report.files:
            self.attachFile(msg, file)

        try:
            s = smtplib.SMTP(host=parameters.get('SMTP Server'),
                             port=parameters.get('SMTP Port'))
            s.sendmail(msg['From'], msg['To'], msg.as_string())
            s.close()
        except:
            raise ReportFailure('Unable to send message via SMTP.')

        return "Message sent!"

class BugzillaReporter:
    def getName(self):
        return 'Bugzilla'
    
    def getParameterNames(self):
        return ['URL', 'Product']

    def fileReport(self, report, parameters):
        raise NotImplementedError
    
class RadarReporter:
    @staticmethod
    def isAvailable():
        # FIXME: Find this .scpt better
        path = os.path.join(os.path.dirname(__file__),'Resources/GetRadarVersion.scpt')
	try:
       	    p = subprocess.Popen(['osascript',path], 
                                 stdout=subprocess.PIPE, stderr=subprocess.PIPE)
       	except:
            return False
        data,err = p.communicate()
        res = p.wait()
        # FIXME: Check version? Check for no errors?
        return res == 0

    def getName(self):
        return 'Radar'

    def getParameterNames(self):
        return ['Component', 'Component Version']

    def fileReport(self, report, parameters):
        component = parameters.get('Component', '')
        componentVersion = parameters.get('Component Version', '')
        personID = ""
        diagnosis = ""
        config = ""

        if not component.strip():
            component = 'Bugs found by clang Analyzer'
        if not componentVersion.strip():
            componentVersion = 'X'

        script = os.path.join(os.path.dirname(__file__),'Resources/FileRadar.scpt')
        args = ['osascript', script, component, componentVersion, personID, report.title,
                report.description, diagnosis, config] + map(os.path.abspath, report.files)
#        print >>sys.stderr, args
	try:
       	    p = subprocess.Popen(args, 
                                 stdout=subprocess.PIPE, stderr=subprocess.PIPE)
       	except:
            raise ReportFailure("Unable to file radar (AppleScript failure).")
        data, err = p.communicate()
        res = p.wait()

        if res:
            raise ReportFailure("Unable to file radar (AppleScript failure).")

        try:
            values = eval(data)
        except:
            raise ReportFailure("Unable to process radar results.")

        # We expect (int: bugID, str: message)
        if len(values) != 2 or not isinstance(values[0], int):
            raise ReportFailure("Unable to process radar results.")

        bugID,message = values
        bugID = int(bugID)
        
        if not bugID:
            raise ReportFailure(message)
        
        return "Filed: <a href=\"rdar://%d/\">%d</a>"%(bugID,bugID)

###

def getReporters():
    reporters = []
    if RadarReporter.isAvailable():
        reporters.append(RadarReporter())
    reporters.append(EmailReporter())
    return reporters