#!/usr/bin/env python

# Copyright 2017-2020 Earth Sciences Department, BSC-CNS

# This file is part of Autosubmit.

# Autosubmit is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# Autosubmit is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with Autosubmit.  If not, see <http://www.gnu.org/licenses/>.

from autosubmit.job.job import Job
from bscearth.utils.date import date2str
from autosubmit.job.job_common import Status, Type


class DicJobs:
    """
    Class to create jobs from conf file and to find jobs by start date, member and chunk

    :param jobs_list: jobs list to use
    :type job_list: JobList
    :param parser: jobs conf file parser
    :type parser: SafeConfigParser
    :param date_list: start dates
    :type date_list: list
    :param member_list: member
    :type member_list: list
    :param chunk_list: chunks
    :type chunk_list: list
    :param date_format: option to format dates
    :type date_format: str
    :param default_retrials: default retrials for ech job
    :type default_retrials: int

    """

    def __init__(self, jobs_list, parser, date_list, member_list, chunk_list, date_format, default_retrials):
        self._date_list = date_list
        self._jobs_list = jobs_list
        self._member_list = member_list
        self._chunk_list = chunk_list
        self._parser = parser
        self._date_format = date_format
        self.default_retrials = default_retrials
        self._dic = dict()


    def read_section(self, section, priority, default_job_type, jobs_data=dict()):
        """
        Read a section from jobs conf and creates all jobs for it

        :param default_job_type: default type for jobs
        :type default_job_type: str
        :param jobs_data: dictionary containing the plain data from jobs
        :type jobs_data: dict
        :param section: section to read
        :type section: str
        :param priority: priority for the jobs
        :type priority: int
        """
        running = 'once'
        if self._parser.has_option(section, 'RUNNING'):
            running = self._parser.get(section, 'RUNNING').lower()
        frequency = int(self.get_option(section, "FREQUENCY", 1))
        if running == 'once':
            self._create_jobs_once(section, priority, default_job_type, jobs_data)
        elif running == 'date':
            self._create_jobs_startdate(section, priority, frequency, default_job_type, jobs_data)
        elif running == 'member':
            self._create_jobs_member(section, priority, frequency, default_job_type, jobs_data)
        elif running == 'chunk':
            synchronize = self.get_option(section, "SYNCHRONIZE", None)
            delay = int(self.get_option(section, "DELAY", -1))
            splits = int(self.get_option(section, "SPLITS", 0))
            self._create_jobs_chunk(section, priority, frequency, default_job_type, synchronize, delay, splits, jobs_data)

    def _create_jobs_once(self, section, priority, default_job_type, jobs_data=dict()):
        """
        Create jobs to be run once

        :param section: section to read
        :type section: str
        :param priority: priority for the jobs
        :type priority: int
        """
        self._dic[section] = self.build_job(section, priority, None, None, None, default_job_type, jobs_data)
        self._jobs_list.graph.add_node(self._dic[section].name)

    def _create_jobs_startdate(self, section, priority, frequency, default_job_type, jobs_data=dict()):
        """
        Create jobs to be run once per start date

        :param section: section to read
        :type section: str
        :param priority: priority for the jobs
        :type priority: int
        :param frequency: if greater than 1, only creates one job each frequency startdates. Always creates one job
                          for the last
        :type frequency: int
        """
        self._dic[section] = dict()
        count = 0
        for date in self._date_list:
            count += 1
            if count % frequency == 0 or count == len(self._date_list):
                self._dic[section][date] = self.build_job(section, priority, date, None, None, default_job_type,
                                                          jobs_data)
                self._jobs_list.graph.add_node(self._dic[section][date].name)

    def _create_jobs_member(self, section, priority, frequency, default_job_type, jobs_data=dict()):
        """
        Create jobs to be run once per member

        :param section: section to read
        :type section: str
        :param priority: priority for the jobs
        :type priority: int
        :param frequency: if greater than 1, only creates one job each frequency members. Always creates one job
                          for the last
        :type frequency: int
        """
        self._dic[section] = dict()
        for date in self._date_list:
            self._dic[section][date] = dict()
            count = 0
            for member in self._member_list:
                count += 1
                if count % frequency == 0 or count == len(self._member_list):
                    self._dic[section][date][member] = self.build_job(section, priority, date, member, None,
                                                                      default_job_type, jobs_data)
                    self._jobs_list.graph.add_node(self._dic[section][date][member].name)

    '''
        Maybe a good choice could be split this function or ascend the
        conditional decision to the parent which makes the call
    '''

    def _create_jobs_chunk(self, section, priority, frequency, default_job_type, synchronize=None, delay=0, splits=0, jobs_data=dict()):
        """
        Create jobs to be run once per chunk

        :param synchronize:
        :param section: section to read
        :type section: str
        :param priority: priority for the jobs
        :type priority: int
        :param frequency: if greater than 1, only creates one job each frequency chunks. Always creates one job
                          for the last
        :type frequency: int
        :param delay: if this parameter is set, the job is only created for the chunks greater than the delay
        :type delay: int
        """
        # Temporally creation for unified jobs in case of synchronize

        if synchronize is not None:
            tmp_dic = dict()
            count = 0
            for chunk in self._chunk_list:
                count += 1
                if delay == -1 or delay < chunk:
                    if count % frequency == 0 or count == len(self._chunk_list):
                        if splits > 1:
                            if synchronize == 'date':
                                tmp_dic[chunk] = []
                                self._create_jobs_split(splits, section, None, None, chunk, priority,
                                                   default_job_type, jobs_data, tmp_dic[chunk])
                            elif synchronize == 'member':
                                tmp_dic[chunk] = dict()
                                for date in self._date_list:
                                    tmp_dic[chunk][date] = []
                                    self._create_jobs_split(splits, section, date, None, chunk, priority,
                                                            default_job_type, jobs_data, tmp_dic[chunk][date])

                        else:
                            if synchronize == 'date':
                                tmp_dic[chunk] = self.build_job(section, priority, None, None,
                                                                chunk, default_job_type, jobs_data)
                            elif synchronize == 'member':
                                tmp_dic[chunk] = dict()
                                for date in self._date_list:
                                    tmp_dic[chunk][date] = self.build_job(section, priority, date, None,
                                                                      chunk, default_job_type, jobs_data)
        # Real dic jobs assignment/creation
        self._dic[section] = dict()
        for date in self._date_list:
            self._dic[section][date] = dict()
            for member in self._member_list:
                self._dic[section][date][member] = dict()
                count = 0
                for chunk in self._chunk_list:
                    count += 1
                    if delay == -1 or delay < chunk:
                        if count % frequency == 0 or count == len(self._chunk_list):
                            if synchronize == 'date':
                                self._dic[section][date][member][chunk] = tmp_dic[chunk]
                            elif synchronize == 'member':
                                self._dic[section][date][member][chunk] = tmp_dic[chunk][date]

                            if splits > 1 and synchronize is None:
                                self._dic[section][date][member][chunk] = []
                                self._create_jobs_split(splits, section, date, member, chunk, priority, default_job_type, jobs_data, self._dic[section][date][member][chunk])
                            elif synchronize is None:
                                self._dic[section][date][member][chunk] = self.build_job(section, priority, date, member,
                                                                                             chunk, default_job_type, jobs_data)
                                self._jobs_list.graph.add_node(self._dic[section][date][member][chunk].name)

    def _create_jobs_split(self, splits, section, date, member, chunk, priority, default_job_type, jobs_data, dict):
        total_jobs = 1
        while total_jobs <= splits:
            job = self.build_job(section, priority, date, member, chunk, default_job_type, jobs_data, total_jobs)
            dict.append(job)
            self._jobs_list.graph.add_node(job.name)
            total_jobs += 1

    def get_jobs(self, section, date=None, member=None, chunk=None):
        """
        Return all the jobs matching section, date, member and chunk provided. If any parameter is none, returns all
        the jobs without checking that parameter value. If a job has one parameter to None, is returned if all the
        others match parameters passed

        :param section: section to return
        :type section: str
        :param date: stardate to return
        :type date: str
        :param member: member to return
        :type member: str
        :param chunk: chunk to return
        :type chunk: int
        :return: jobs matching parameters passed
        :rtype: list
        """
        jobs = list()

        if section not in self._dic:
            return jobs

        dic = self._dic[section]
        if type(dic) is not dict:
            jobs.append(dic)
        else:
            if date is not None:
                self._get_date(jobs, dic, date, member, chunk)
            else:
                for d in self._date_list:
                    self._get_date(jobs, dic, d, member, chunk)
        return jobs

    def _get_date(self, jobs, dic, date, member, chunk):
        if date not in dic:
            return jobs
        dic = dic[date]
        if type(dic) is not dict:
            jobs.append(dic)
        else:
            if member is not None:
                self._get_member(jobs, dic, member, chunk)
            else:
                for m in self._member_list:
                    self._get_member(jobs, dic, m, chunk)

        return jobs

    def _get_member(self, jobs, dic, member, chunk):
        if member not in dic:
            return jobs
        dic = dic[member]
        if type(dic) is not dict:
            jobs.append(dic)
        else:
            if chunk is not None:
                if chunk in dic:
                    jobs.append(dic[chunk])
            else:
                for c in self._chunk_list:
                    if c not in dic:
                        continue
                    jobs.append(dic[c])
        return jobs

    def build_job(self, section, priority, date, member, chunk, default_job_type, jobs_data=dict(), split=-1):
        name = self._jobs_list.expid
        if date is not None:
            name += "_" + date2str(date, self._date_format)
        if member is not None:
            name += "_" + member
        if chunk is not None:
            name += "_{0}".format(chunk)
        if split > -1:
            name += "_{0}".format(split)
        name += "_" + section
        if name in jobs_data:
            job = Job(name, jobs_data[name][1], jobs_data[name][2], priority)
            job.local_logs = (jobs_data[name][8], jobs_data[name][9])
            job.remote_logs = (jobs_data[name][10], jobs_data[name][11])

        else:
            job = Job(name, 0, Status.WAITING, priority)


        job.section = section
        job.date = date
        job.member = member
        job.chunk = chunk
        job.date_format = self._date_format
        if split > -1:
            job.split = split

        job.frequency = int(self.get_option(section, "FREQUENCY", 1))
        job.delay = int(self.get_option(section, "DELAY", -1))
        job.wait = self.get_option(section, "WAIT", 'true').lower() == 'true'
        job.rerun_only = self.get_option(section, "RERUN_ONLY", 'false').lower() == 'true'
        job_type = self.get_option(section, "TYPE", default_job_type).lower()
        if job_type == 'bash':
            job.type = Type.BASH
        elif job_type == 'python':
            job.type = Type.PYTHON
        elif job_type == 'r':
            job.type = Type.R
        job.executable = self.get_option(section, "EXECUTABLE", None)

        job.platform_name = self.get_option(section, "PLATFORM", None)
        if job.platform_name is not None:
            job.platform_name = job.platform_name
        job.file = self.get_option(section, "FILE", None)
        job.queue = self.get_option(section, "QUEUE", None)
        job.check = str(self.get_option(section, "CHECK", 'True')).lower()
        job.modules = str(self.get_option(section, "MODULES", None))
        job.processors = str(self.get_option(section, "PROCESSORS", 1))
        job.threads = str(self.get_option(section, "THREADS", 1))
        job.tasks = str(self.get_option(section, "TASKS", '0'))
        job.memory = self.get_option(section, "MEMORY", '')
        job.memory_per_task = self.get_option(section, "MEMORY_PER_TASK", '')
        job.wallclock = self.get_option(section, "WALLCLOCK", '')
        job.retrials = int(self.get_option(section, 'RETRIALS', -1))
        if job.retrials == -1:
            job.retrials = None
        job.notify_on = [x.upper() for x in self.get_option(section, "NOTIFY_ON", '').split(' ')]
        job.synchronize = self.get_option(section, "SYNCHRONIZE", None)
        job.check_warnings = str(self.get_option(section, "SHOW_CHECK_WARNINGS", 'false')).lower()
        job.running = self.get_option(section, 'RUNNING', 'once').lower()

        if self.get_option(section, "SKIPPABLE", "False").lower() == "true":
            job.skippable = True
        else:
            job.skippable = False
        if job.check_warnings == 'true':
            job.check_warnings = True
        else:
            job.check_warnings = False

        self._jobs_list.get_job_list().append(job)

        return job

    def get_option(self, section, option, default):
        """
        Returns value for a given option

        :param section: section name
        :type section: str
        :param option: option to return
        :type option: str
        :param default: value to return if not defined in configuration file
        :type default: object
        """
        if self._parser.has_option(section, option):
            return self._parser.get(section, option)
        else:
            return default

