#!/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:
    swarm_rename_users.py

DESCRIPTION:
    This script renames Swarm users. Expects parameter to be a file containing:

        old_username new_username   (separated by whitespace)

    You can run like this:

        python3 swarm_rename_users.py -i users.list

    To get usage flags and parameters:

        python3 swarm_rename_users.py -h

    It assumes your current environment settings are valid (P4PORT/P4USER/P4TICKET etc) although
    these can be specified via other parameters.

    It works by directly editing the "p4 keys" used by Swarm and updating the JSON values.
    Test harness is in tests/test_swarm_rename_users.py

    The following p4 keys are potentially updated:

        swarm-activity-*
        swarm-comment-*
        swarm-project-*
        swarm-review-*
        swarm-fileInfo-*
        swarm-workflow-*
        swarm-user-*

    This is supported only with a consulting SoW.

    Current version tested with Swarm 2020.2

    IMPORTANT: run this on a test system first - be careful !!!!!

    If a run is interrupted, then it is not dangerous to run the script again with the same
    set of users - it will just rename any found, ignoring those records where user has 
    already been renamed.

"""

# Python 2.7/3.3 compatibility.
from __future__ import print_function

import sys
import os
import textwrap
import argparse
import logging
import P4
import json
from collections import defaultdict
from six.moves import range
import six

script_name = os.path.basename(os.path.splitext(__file__)[0])

# Avoid utf encoding issues when writing to stdout
sys.stdout = os.fdopen(sys.stdout.buffer.fileno(), 'w', encoding='utf8')

LOGDIR = os.getenv('LOGS', '/p4/1/logs')

DEFAULT_LOG_FILE = "log-%s.log" % script_name
if os.path.exists(LOGDIR):
    DEFAULT_LOG_FILE = os.path.join(LOGDIR, "%s.log" % script_name)
DEFAULT_VERBOSITY = 'DEBUG'
LOGGER_NAME = 'P4Triggers'

class SwarmObject(object):
    "Wrapper around Swarm JSON"

    updated = False
    json = None

    def __init__(self, jsonStr, keyword=None):
        if keyword and keyword in jsonStr:
            self.json = jsonStr[keyword]
        else:
            self.json = jsonStr

    def getVal(self, k):
        if k in self.json:
            return self.json[k]
        return None

    def getKeys(self, k):
        d = self.getVal(k)
        if not d:
            return None
        results = []
        for u, _ in six.iteritems(d):
            results.append(u)
        return results

    def setVal(self, k, v):
        self.json[k] = v
        self.updated = True

    def updateVal(self, k, usersToRename):
        u = self.getVal(k)
        if u and u in usersToRename:
            self.setVal(k, usersToRename[u])

    def updateDictKeyVal(self, k, usersToRename):
        "Update 'key': {'u1': []}"
        if not self.json or not k in self.json or not self.json[k]:
            return
        users = []
        for u, _ in six.iteritems(self.json[k]):
            users.append(u)
        for u in users:
            if u in usersToRename:
                # Copy old entry to new name and delete old
                self.json[k][usersToRename[u]] = self.json[k][u]
                del self.json[k][u]
                self.updated = True

    def updateArrayVal(self, k, usersToRename):
        "Update 'key': [user array]"
        if not k in self.json or not self.json[k]:
            return
        for i, u in enumerate(self.json[k]):
            if u in usersToRename:
                self.json[k][i] = usersToRename[u]
                self.updated = True

    def updateArrayDictVal(self, k, k2, usersToRename):
        """ Entry is array of dicts with key
        project = {"k": [{"k2": "u1"}]}
        """
        if not k in self.json or not self.json[k]:
            return
        for i, _ in enumerate(self.json[k]):
            if k2 in self.json[k][i]:
                u = self.json[k][i][k2]
                if u in usersToRename:
                    self.json[k][i][k2] = usersToRename[u]
                    self.updated = True

    def updateDictArrayVal(self, k, k2, usersToRename):
        """ Entry is a dict with value as array
        project = {"k": {"k2": ["u1", "u2"]}}
        """
        if not k in self.json or not self.json[k] or not k2 in self.json[k]:
            return
        for i, u in enumerate(self.json[k][k2]):
            if u in usersToRename:
                self.json[k][k2][i] = usersToRename[u]
                self.updated = True

    def updateDictArrayDictVal(self, k, k2, usersToRename):
        """ Entry is an array of dicts with value as array
        project = {"k": [{"j": ["u1", "u2"]}]}
        """
        if not k in self.json or not self.json[k]:
            return
        for i, _ in enumerate(self.json[k]):
            if k2 in self.json[k][i]:
                for j, u in enumerate(self.json[k][i][k2]):
                    if u in usersToRename:
                        self.json[k][i][k2][j] = usersToRename[u]
                        self.updated = True

    def updateDictArrayDictDictVal(self, k, k2, k3, usersToRename):
        """ Entry is an array of dicts with value as a dict containing an array
        project = {"k": [{"k2": {"k3": ["u1", "u2"]}}]}
        """
        if not k in self.json or not self.json[k]:
            return
        for i, _ in enumerate(self.json[k]):
            if k2 in self.json[k][i]:
                if k3 in self.json[k][i][k2]:
                    for j, u in enumerate(self.json[k][i][k2][k3]):
                        if u in usersToRename:
                            self.json[k][i][k2][k3][j] = usersToRename[u]
                            self.updated = True

class Activity(SwarmObject):
    "Swarm Activity"

    def __init__(self, json):
        SwarmObject.__init__(self, json, 'activity')

    def user(self):
        return self.getVal('user')

    def behalfOf(self):
        return self.getVal('behalfOf')

    def Update(self, usersToRename):
        self.updateVal("user", usersToRename)
        self.updateVal("behalfOf", usersToRename)

class Comment(SwarmObject):
    "Swarm Comment"

    def __init__(self, json):
        SwarmObject.__init__(self, json, 'comment')

    def user(self):
        return self.getVal('user')

    def readBy(self):
        return self.getVal('readBy')

    def Update(self, usersToRename):
        self.updateVal("user", usersToRename)
        self.updateArrayVal("readBy", usersToRename)

class Project(SwarmObject):
    "Swarm Project"

    # 'members' - this is via group swarm-<project> and the Users: field

    # swarm-project-test = {
    # "name": "Test Swarm Project",
    # "defaults": {
    #     "reviewers": ["jim"]
    # },
    # "description": "Test for demo purposes",
    # "owners": [
    #     "fred",
    #     "bill"
    # ],
    # "moderators": [
    #     "fred",
    #     "bill"
    # ],

    # "branches": [
    #     {
    #         "id": "main",
    #         "name": "Main",
    #         "workflow": null,
    #         "paths": [
    #             "\/\/depot\/p4-test\/main\/..."
    #         ],
    #         "defaults": {
    #             "reviewers": []
    #         },
    #         "minimumUpVotes": null,
    #         "retainDefaultReviewers": false,
    #         "moderators": [],
    #         "moderators-groups": []
    #     },

    def __init__(self, json):
        SwarmObject.__init__(self, json, 'project')

    def owners(self):
        return self.getVal('owners')

    def moderators(self):
        return self.getVal('moderators')

    def branches(self):
        return self.getVal('branches')

    def defaultReviewers(self):
        defaults = self.getVal('defaults')
        k = 'reviewers'
        if defaults and k in defaults:
            return defaults[k]
        return None

    def branchDefaultReviewers(self):
        branches = self.getVal('branches')
        if not branches:
            return None
        results = []
        for b in branches:
            k = 'defaults'
            j = 'reviewers'
            if b and k in b and j in b[k]:
                results.append({b['id']: b[k][j]})
        return results

    def branchModerators(self):
        branches = self.getVal('branches')
        if not branches:
            return None
        results = []
        for b in branches:
            k = 'moderators'
            if b and k in b:
                results.append({b['id']: b[k]})
        return results

    def Update(self, usersToRename):
        self.updateArrayVal("owners", usersToRename)
        self.updateArrayVal("moderators", usersToRename)
        self.updateDictArrayVal("defaults", "reviewers", usersToRename)
        self.updateDictArrayDictVal("branches", "moderators", usersToRename)
        self.updateDictArrayDictDictVal("branches", "defaults", "reviewers", usersToRename)

class Review(SwarmObject):
    "Swarm Review"

    # "author":"martin",
    # "approvals":{"jane":[1]},
    # "participants":{"martin":[],"jane":{"vote":{"value":1,"version":1}}
    # "versions": [{"user": "fred", "difference": 1}]

    def __init__(self, json):
        SwarmObject.__init__(self, json, 'review')

    def author(self):
        return self.getVal('author')

    def approvals(self):
        return self.getKeys('approvals')

    def participants(self):
        return self.getKeys('participants')

    def versionUsers(self):
        d = self.getVal('versions')
        if not d:
            return None
        results = []
        for v in d:
            if 'user' in v:
                results.append(v['user'])
        return results

    def Update(self, usersToRename):
        self.updateVal("author", usersToRename)
        self.updateDictKeyVal("approvals", usersToRename)
        self.updateDictKeyVal("participants", usersToRename)
        self.updateArrayDictVal("versions", "user", usersToRename)

class FileInfo(SwarmObject):

    # swarm-fileInfo-1018362-468732cb9f10670c2599d6844a82cd36 = {"readBy":{
    #     "jim":{"version":28,"digest":"EEFF792157ADBB2311938D7358F0588B"},
    #     "mike":{"version":30,"digest":"1E43325205374FBBE0E72DAB5930F8DB"}

    def __init__(self, json):
        SwarmObject.__init__(self, json, 'fileInfo')

    def readBy(self):
        return self.getKeys('readBy')

    def Update(self, usersToRename):
        try:
            self.updateDictKeyVal("readBy", usersToRename)
        except:
            print("Error process FileInfo: %s" % self.json)

class Workflow(SwarmObject):

    # swarm-workflow-fffffff5 = {"on_submit":{"with_review":{"rule":"approved","mode":"inherit"},"without_review":{"rule":"reject","mode":"inherit"}},
    # "owners":["swarm-group-dev","dave", "scott"],
    # "end_rules":{"update":{"rule":"no_checking","mode":"inherit"}},
    # "auto_approve":{"rule":"never","mode":"inherit"},
    # etc...

    def __init__(self, json):
        SwarmObject.__init__(self, json, 'workflow')

    def owners(self):
        return self.getVal('owners')

    def Update(self, usersToRename):
        self.updateArrayVal("owners", usersToRename)

class SwarmRenameUsers(object):
    """See module doc string for details"""

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

    def parse_args(self, doc, args):
        """Common parsing and setting up of args"""
        desc = textwrap.dedent(doc)
        parser = argparse.ArgumentParser(
            formatter_class=argparse.RawDescriptionHelpFormatter,
            description=desc,
            epilog="Copyright (c) 2021 Perforce Software, Inc."
        )
        self.add_parse_args(parser)     # Should be implemented by subclass
        self.options = parser.parse_args(args=args)
        self.init_logger()
        self.logger.debug("Command Line Options: %s\n" % self.options)

    def add_parse_args(self, parser, default_log_file=None, default_verbosity=None):
        """Default trigger arguments - common to all triggers
        :param default_verbosity:
        :param default_log_file:
        :param parser:
        """
        if not default_log_file:
            default_log_file = DEFAULT_LOG_FILE
        if not default_verbosity:
            default_verbosity = DEFAULT_VERBOSITY
        parser.add_argument('-p', '--port', default=None,
                            help="Perforce server port - set using %%serverport%%. Default: $P4PORT")
        parser.add_argument('-u', '--user', default=None, help="Perforce user. Default: $P4USER")
        parser.add_argument('-L', '--log', default=default_log_file, help="Default: " + default_log_file)
        parser.add_argument('-i', '--input', help="Name of a file containing a list of users: oldname newname")
        parser.add_argument('-v', '--verbosity',
                            nargs='?',
                            const="INFO",
                            default=default_verbosity,
                            choices=('DEBUG', 'WARNING', 'INFO', 'ERROR', 'FATAL'),
                            help="Output verbosity level. Default is: " + default_verbosity)

    def init_logger(self, logger_name=None):
        if not logger_name:
            logger_name = LOGGER_NAME
        self.logger = logging.getLogger(logger_name)
        self.logger.setLevel(self.options.verbosity)
        logformat = '%(levelname)s %(asctime)s %(filename)s %(lineno)d: %(message)s'
        logging.basicConfig(format=logformat, filename=self.options.log, level=self.options.verbosity)
        formatter = logging.Formatter('%(message)s')
        ch = logging.StreamHandler(sys.stderr)
        ch.setLevel(logging.INFO)
        ch.setFormatter(formatter)
        self.logger.addHandler(ch)

    def renameObject(self, p4, usersToRename, p4key, klassName, klass):
        updateCount = 0
        count = 0
        values = p4.run_keys("-e", p4key)
        self.logger.info("%s: %d" % (klassName, len(values)))
        for v in values:
            count += 1
            if count % 1000 == 0:
                self.logger.info("Progress %s: %d updated, %d so far" % (klassName, updateCount, count))
            obj = klass(json.loads(v['value']))
            obj.Update(usersToRename)
            if obj.updated:
                updateCount += 1
                p4.run_key(v['key'], json.dumps(obj.json, separators=(',', ':')))
        self.logger.info("%s Updated: %d" % (klassName, updateCount))

    def renameUserRecords(self, p4, usersToRename, p4key, klassName):
        updateCount = 0
        count = 0
        values = p4.run_keys("-e", p4key)
        users = {}
        for v in values:
            users[v['key']] = v['value']
        self.logger.info("%s: %d" % (klassName, len(values)))
        for v in values:
            count += 1
            if count % 100 == 0:
                self.logger.info("Progress %s: %d updated, %d so far" % (klassName, updateCount, count))
            u = v['key'].replace("swarm-user-", "")
            if u in usersToRename:
                updateCount += 1
                userID = "swarm-user-%s" % usersToRename[u]
                p4.run_key(userID, v['value'])
                p4.run_key('-d', v['key'])
        self.logger.info("%s Updated: %d" % (klassName, updateCount))

    def renameUsers(self, p4, usersToRename):
        self.renameObject(p4, usersToRename, "swarm-activity-*", "Activity", Activity)
        self.renameObject(p4, usersToRename, "swarm-comment-*", "Comment", Comment)
        self.renameObject(p4, usersToRename, "swarm-project-*", "Project", Project)
        self.renameObject(p4, usersToRename, "swarm-review-*", "Review", Review)
        self.renameObject(p4, usersToRename, "swarm-fileInfo-*", "FileInfo", FileInfo)
        self.renameObject(p4, usersToRename, "swarm-workflow-*", "Workflow", Workflow)
        self.renameUserRecords(p4, usersToRename, "swarm-user-*", "User")

    def run(self):
        """Runs script"""
        try:
            self.logger.debug("%s: starting" % script_name)

            p4 = P4.P4()
            if self.options.port:
                p4.port = self.options.port
            if self.options.user:
                p4.user = self.options.user
            p4.connect()

            usersToRename = {}
            if self.options.input:
                with open(self.options.input, "r") as f:
                    for line in f.readlines():
                        oldUser, newUser = line.split()
                        usersToRename[oldUser] = newUser

            self.renameUsers(p4, usersToRename)

        except Exception as e:
            self.logger.exception(e)
            print(str(e))

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