# Copyright 2019 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import base64
import errno
import json
import os
import random
import re
import signal
import socket
import subprocess
import sys
import time
import urllib

import cliapp
import requests

from yarnutils import *



class EffiAPI:

    config_filename = 'effiapi.json'

    def __init__(self, variables):
        self.v = variables

    def write_config(self):
        with open(self.config_filename, 'w') as f:
            json.dump(self.get_config(), f, indent=4)

    def get_config(self):
        return {
            'fake': True,
            'muck-url': 'xxx',
            'log': 'effiapi.log',
            'pid': 'effiapi.pid',
            'host': '127.0.0.1',
            'port': 8080,
        }

    def start(self):
        config = self.get_config()
        self.v['baseurl'] = 'http://{}:{}'.format(
            config['host'], config['port'])

        effiapi = os.path.join(srcdir, 'effiapi')
        self.daemonize([effiapi, self.config_filename])

        self.wait_for_port(config['host'], config['port'])

    def terminate(self):
        config = self.get_config()
        with open(config['pid']) as f:
            pid = int(f.read().strip())
            os.kill(pid, signal.SIGTERM)

    def daemonize(self, argv):
        prefix = [
            '/usr/sbin/daemonize', '-o', 'stdout', '-e', 'stderr', '-c', '.'
        ]
        subprocess.check_call(prefix + argv)

    def wait_for_port(self, host, port):
        MAX = 5
        t = time.time()
        while time.time() < t + MAX:
            try:
                s = socket.socket()
                s.connect((host, port))
            except socket.error:
                time.sleep(0.1)
            except OSError as e:
                raise
            else:
                return

    def POST(self, path, headers, body):
        headers['Content-Type'] = 'application/json'
        body = json.dumps(body)
        self.request(requests.post, path, headers, body)

    def PUT(self, path, headers, body):
        headers['Content-Type'] = 'application/json'
        body = json.dumps(body)
        self.request(requests.put, path, headers, body)

    def GET(self, path, headers, body):
        self.request(requests.get, path, headers, body)

    def DELETE(self, path, headers, body):
        self.request(requests.delete, path, headers, body)

    def request(self, func, path, headers, body):
        url = '{}{}'.format(self.v['baseurl'], path)
        self.v['request'] = {
            'url': url,
            'func': repr(func),
            'headers': headers,
            'body': body,
        }

        r = func(url, headers=headers, data=body)
        self.v['response'] = {
            'status_code': r.status_code,
            'body': r.text,
            'headers': dict(r.headers),
        }

    def get_status_code(self):
        r = self.v['response']
        return r['status_code']

    def get_header(self, name):
        r = self.v['response']
        return r['headers'].get(name, '')

    def get_json_body(self):
        r = self.v['response']
        return json.loads(r['body'])


def get_json_match():
    match = get_next_match()
    return json.loads(match)


def save_for_expansion(name, value):
    V[name] = value


def get_expanded_match():
    match = get_next_match()
    print 'match', match
    return expand(match, V)


def expand(text, variables):
    result = ''
    while text:
        print 'expand: text=%r' % text
        m = re.search(r'\${(?P<name>[^}]+)}', text)
        if not m:
            result += text
            break
        name = m.group('name')
        print('expanding ', name, repr(variables[name]))
        result += text[:m.start()] + variables[name]
        text = text[m.end():]
    print 'expand: result=%r' % result
    return result


srcdir = os.environ['SRCDIR']
datadir = os.environ['DATADIR']
V = Variables(datadir)
effiapi = EffiAPI(V)