#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# ==============================================================================
# Copyright and license info is available in the LICENSE file included with
# the Server Deployment Package (SDP), and also available online:
# https://swarm.workshop.perforce.com/projects/perforce-software-sdp/view/main/LICENSE
# ------------------------------------------------------------------------------

"""
NAME:
    DefaultSwarmReviewDesc.py

DESCRIPTION:
    Create a default change description (form-in) for swarm user - so updates Swarm review changelist

    Can be used together with CheckChangeDesc.py (change-submit)

    To install, add a line to your Perforce triggers table like the following:

        default-swarm-desc form-in change "python /p4/common/bin/triggers/DefaultSwarmReviewDesc.py -p %serverport% -u perforce %user% %formfile% "

    or (if server is standard SDP and has appropriate environment defaults for P4PORT and P4USER):

        default-swarm-desc form-in change "python /p4/common/bin/triggers/DefaultSwarmReviewDesc.py %user% %formfile% "

    You may need to provide the full path to python executable, or edit the path to the trigger.

    Also, don't forget to make the file executable, and set the configuration variables below.

    To configure, read and modify the following lines up to the comment that
    reads "END OF CONFIGURATION BLOCK".  You may also need to modify the
    definition of which fields constitute a new job based on your jobspec.  This
    is in the allowed_job() function.
"""

# Python 2.7/3.3 compatibility.
from __future__ import print_function

import sys
import yaml
import re
import argparse
import textwrap
import P4Triggers
import shutil
import os
from string import Template


class DefaultSwarmReviewDesc(P4Triggers.P4Trigger):
    """See module doc string for details"""

    def __init__(self, *args, **kwargs):
        P4Triggers.P4Trigger.__init__(self, **kwargs)
        self.parse_args(__doc__, args)

    def add_parse_args(self, parser):
        """Specific args for this trigger - also calls super class to add common trigger args"""
        parser.add_argument('-c', '--config-file', default=None,
                            help="Configuration file for trigger. Default: CreateSwarmReview.yaml")
        parser.add_argument('user', help="User carrying out the command - %%user%% argument from triggers entry.")
        parser.add_argument('formfile',
                            help="Formfile containing job definition - %%formfile%% argument from triggers entry.")
        super(DefaultSwarmReviewDesc, self).add_parse_args(parser)

    def formatReviewDescription(self, review_description, **kwargs):
        """Format using specified format options - see call below
        Assumes review_description is an array of lines in config file"""
        desc = "\n".join(review_description)
        desc = desc.replace("\\n", "\n")
        t = Template(desc)
        result = t.safe_substitute(**kwargs)
        return result

    def load_config(self, config_file=None):
        if not config_file:
            config_file = "/p4/common/config/DefaultSwarmReviewDesc.yaml"
        config = {}
        try:
            with open(config_file, 'r') as f:
                config = yaml.load(f)
        except Exception as e:
            self.logger.error(str(e))
        return config


    def run(self):
        """Runs trigger"""
        try:
            self.logger.debug("DefaultSwarmReviewDesc firing")
            config = self.load_config(self.options.config_file)
            if not 'review_description' in config or not config['review_description']:
                return 0
            self.setupP4()
            self.p4.connect()
            with open(self.options.formfile, 'r') as f:
                contents = f.read()
            chg = self.p4.parse_change(contents)
            self.logger.debug("Change: %s" % str(chg))
            if "Date" in chg:   # If Date field set then abort because change has already been processed
                self.logger.debug("Change already processed so exiting")
                return 0
            if not "User" in chg or chg["User"] != config['swarm_user']:
                self.logger.debug("Ignoring change")
                return 0

            # job_desc = ""
            # if jobs and len(jobs) > 0:
            #     job_desc = jobs[0]['Description']
            #     job_desc = job_desc.rstrip("\n")
            description = self.formatReviewDescription(config['review_description'])
            chg["Description"] = description
            contents = self.p4.format_change(chg)
            self.logger.debug("Updated chg: %s" % str(chg))
            tempfile = "%s~" % self.options.formfile
            shutil.move(self.options.formfile, tempfile)
            with open(self.options.formfile, 'w') as f:
                f.write(contents)
            os.remove(tempfile)
        except Exception:
            return self.reportException()

        return 0


if __name__ == '__main__':
    """ Main Program"""
    trigger = DefaultSwarmReviewDesc(*sys.argv[1:])
    sys.exit(trigger.run())