#!/usr/bin/env python3
#
# Todo:
#
# - Remove all json files from previous runs
import json
import logging
import os
import pystache
import requests


URL = 'https://moose.leap.se:9200'


def _get_logger():
    logger = logging.getLogger(__name__)
    ch = logging.StreamHandler()
    ch.setFormatter(logging.Formatter('%(asctime)s %(message)s'))
    logger.addHandler(ch)
    logger.setLevel(logging.INFO)
    return logger


def _delete_jsons(directory):
    logger.info('removing *.json from %s' % directory)
    for f in os.listdir(directory):
        if f.endswith('.json'):
            os.unlink(os.path.join(directory, f))


def generate_visualizations(tests):
    with open(os.path.join('templates', 'visualization.mustache'), 'r') as f:
        template = f.read()

    path = os.path.join('templates', 'visualization-visState-time.mustache')
    with open(path) as f:
        template_visState_time = f.read()

    path = os.path.join('templates', 'visualization-visState-cpu.mustache')
    with open(path) as f:
        template_visState_cpu = f.read()

    path = os.path.join('templates', 'visualization-visState-memory.mustache')
    with open(path) as f:
        template_visState_memory = f.read()

    path = os.path.join('templates', 'visualization-searchSourceJSON.mustache')
    with open(path) as f:
        template_searchSourceJSON = f.read()

    out_dir = './visualization'
    _delete_jsons(out_dir)

    # remove all json files in output directory
    for f in os.listdir(out_dir):
        if f.endswith('.json'):
            os.unlink(os.path.join(out_dir, f))

    graphs = [
        ('time', 'Time taken by ', 'weasel', template_visState_time),
        ('cpu', 'CPU percentage used by ', 'weasel', template_visState_cpu),
        ('memory', 'Memory used by ', 'weasel', template_visState_memory)
    ]

    for test_name in tests:

        for type, title, host, template_visState in graphs:

            out_file = os.path.join(out_dir, test_name + '_' + type + '.json')
            logger.info('Generating ' + out_file)

            query = "commit_info.project:soledad" \
                " AND machine_info.host='" + host + "'" \
                " AND name='" + test_name + "'"
#                " AND commit_info.branch='master'"

            # results that are accurate for time are not accurate for memory,
            # and vice versa.
            if type == 'time' or type == 'cpu':
                query += " AND NOT _exists_:extra_info.memory_percent"
            else:
                query += " AND _exists_:extra_info.memory_percent"

            if type == 'cpu':
                query += " AND _exists_:extra_info.cpu_percent"

            context = {
                'title': title + test_name,
                'test_name': test_name,
                'query': query,
            }

            visState = pystache.render(template_visState, context)
            assert json.loads(visState)
            context['visState'] = json.dumps(visState)

            searchSourceJSON = pystache.render(
                template_searchSourceJSON, context)
            assert json.loads(searchSourceJSON)
            context['searchSourceJSON'] = json.dumps(searchSourceJSON)

            rendered = pystache.render(template, context)
            assert json.loads(rendered)

            with open(out_file, 'w') as out:
                out.write(rendered)


def _dashboard_for_all_tests(tests):
    with open(os.path.join('templates', 'dashboard.mustache'), 'r') as f:
        template = f.read()

    out_dir = './dashboard'
    _delete_jsons(out_dir)

    out_file = os.path.join(out_dir, 'soledad-benchmarks.json')
    logger.info('Generating ' + out_file)

    panels = []
    panelIndex = 1
    row = 1
    for test_name in tests:
        for type, col in [('time', 1), ('resources', 7)]:
            panels.append({
                'id': test_name + '_' + type,
                'panelIndex': panelIndex,
                'col': col,
                'row': row,
                'size_x': 6,
                'size_y': 3,
                'type': 'visualization',
            })
            panelIndex += 1
        row += 3

    context = {'panels_json': json.dumps(json.dumps(panels))}
    rendered = pystache.render(template, context)
    assert json.loads(rendered), rendered

    with open(out_file, 'w') as f:
        f.write(rendered)


def _dashboard_for_one_test(test):
    path = os.path.join('templates', 'dashboard-per-test.mustache')
    with open(path, 'r') as f:
        template = f.read()
    context = {'test_name': test}
    rendered = pystache.render(template, context)
    out_file = os.path.join('dashboard', 'dashboard-%s.json' % test)
    with open(out_file, 'w') as out:
        out.write(rendered)


def generate_dashboards(tests):
    _dashboard_for_all_tests(tests)
    for test in tests:
        _dashboard_for_one_test(test)


def _get_test_names():
    with open('./query/test_names.json') as f:
        response = requests.get(URL + '/_search', data=f)
        buckets = response.json()['aggregations']['test_names']['buckets']
    tests = []
    for d in buckets:
        name = d['key']
        tests.append(name)
    return sorted(tests)


if __name__ == '__main__':
    logger = _get_logger()
    tests = _get_test_names()
    generate_dashboards(tests)
    generate_visualizations(tests)