# Copyright (c) 2013 Mirantis Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import json

import datetime
import operator
import time

import flask

from dashboard import decorators, parameters
from dashboard import helpers
from dashboard import vault
from stackalytics.processor import utils


blueprint = flask.Blueprint('reports', __name__, url_prefix='/report')


@blueprint.route('/blueprint/<module>/<blueprint_name>')
@decorators.templated()
@decorators.exception_handler()
def blueprint_summary(module, blueprint_name):
    blueprint_id = module + ':' + blueprint_name
    bpd = vault.get_memory_storage().get_record_by_primary_key(
        'bpd:' + blueprint_id)
    if not bpd:
        flask.abort(404)
        return

    bpd = helpers.extend_record(bpd)
    record_ids = vault.get_memory_storage().get_record_ids_by_blueprint_ids(
        [blueprint_id])
    activity = [helpers.extend_record(record) for record in
                vault.get_memory_storage().get_records(record_ids)]
    activity.sort(key=lambda x: x['date'], reverse=True)

    return {'blueprint': bpd, 'activity': activity}


def _get_day(timestamp, time_now):
    return int((time_now - timestamp) / 60 / 60 / 24)


def _process_stat(data, key, time_now):
    if not data:
        return None

    data = sorted(data, key=operator.itemgetter(key))

    days = _get_day(data[0][key], time_now)
    chart_data = [0] * (days + 1)
    sum_ages = 0
    for review in data:
        age = time_now - review[key]
        sum_ages += age
        review[key + '_age'] = utils.make_age_string(age)
        chart_data[_get_day(review[key], time_now)] += 1

    return {
        'reviews': data,
        'average': utils.make_age_string(sum_ages / len(data)),
        'max': data[0][key + '_age'],
        'chart_data': json.dumps(chart_data),
    }


@blueprint.route('/reviews/<module>')
@decorators.templated()
@decorators.exception_handler()
def open_reviews(module):
    memory_storage_inst = vault.get_memory_storage()
    time_now = int(time.time())

    module_id_index = vault.get_vault()['module_id_index']
    module = module.lower()
    if module in module_id_index:
        modules = module_id_index[module]['modules']
    else:
        modules = [module]

    review_ids = (memory_storage_inst.get_record_ids_by_modules(modules) &
                  memory_storage_inst.get_record_ids_by_type('review'))

    waiting_on_reviewer = []
    total_open = 0

    for review in memory_storage_inst.get_records(review_ids):
        if review['status'] == 'NEW':
            total_open += 1
            if review['value'] in [1, 2]:
                waiting_on_reviewer.append(review)

    return {
        'module': module,
        'total_open': total_open,
        'waiting_on_reviewer': len(waiting_on_reviewer),
        'waiting_on_submitter': total_open - len(waiting_on_reviewer),
        'latest_revision': _process_stat(
            waiting_on_reviewer, 'updated_on', time_now),
        'first_revision': _process_stat(waiting_on_reviewer, 'date', time_now),
    }


def _get_punch_card_data(records):
    punch_card_raw = []  # matrix days x hours
    for wday in xrange(0, 7):
        punch_card_raw.append([0] * 24)
    for record in records:
        tt = datetime.datetime.fromtimestamp(record['date']).timetuple()
        punch_card_raw[tt.tm_wday][tt.tm_hour] += 1

    punch_card_data = []  # format for jqplot bubble renderer
    for wday in xrange(0, 7):
        for hour in xrange(0, 24):
            v = punch_card_raw[wday][hour]
            if v:
                punch_card_data.append([hour, wday, v, v])

    return punch_card_data


@blueprint.route('/users/<user_id>')
@decorators.templated()
@decorators.exception_handler()
def user_activity(user_id):
    user = vault.get_user_from_runtime_storage(user_id)
    if not user:
        flask.abort(404)
    user = helpers.extend_user(user)

    memory_storage_inst = vault.get_memory_storage()
    records = memory_storage_inst.get_records(
        memory_storage_inst.get_record_ids_by_user_ids([user_id]))

    activity = helpers.get_activity(records, 0, -1)

    punch_card_data = _get_punch_card_data(activity)

    return {
        'user': user,
        'activity': activity[:parameters.DEFAULT_STATIC_ACTIVITY_SIZE],
        'total_records': len(activity),
        'contribution': helpers.get_contribution_summary(activity),
        'punch_card_data': json.dumps(punch_card_data),
    }


@blueprint.route('/large_commits')
@decorators.jsonify('commits')
@decorators.exception_handler()
@decorators.record_filter()
def get_commit_report(records):
    loc_threshold = int(flask.request.args.get('loc_threshold') or 0)
    response = []
    for record in records:
        if ('loc' in record) and (record['loc'] > loc_threshold):
            nr = dict([(k, record[k]) for k in ['loc', 'subject', 'module',
                                                'primary_key', 'change_id']])
            response.append(nr)
    return response