#!/usr/bin/python3

from ansible.module_utils.basic import AnsibleModule
import requests
import json


class InfluxdbOrg:
    def __init__(self, api_url, api_token, name):
        self.api_url = api_url
        self.headers = {'Authorization': 'Token {}'.format(api_token)}
        self.name = name

    def exists(self):
        url = '{}/api/v2/orgs'.format(self.api_url)
        r = requests.get(url, headers=self.headers, params={'org': self.name})

        if r.status_code == 404:
            return False
        elif r.status_code == 200:
            data = json.loads(r.text)
            for org in data['orgs']:
                if org['name'] == self.name:
                    self.id = org['id']
                    self.description = org['description']
                    return True
            return False

        raise Exception(
            'Influxdb',
            'Bad status code {}: {}'.format(r.status_code, r.text)
        )

    def has_changed(self, description):
        if self.description == description:
            return False
        return True

    def create(self, description):
        url = '{}/api/v2/orgs'.format(self.api_url)
        r = requests.post(
            url,
            headers=self.headers,
            json={'name': self.name, 'description': description}
        )

        if r.status_code != 201:
            raise Exception(
                'Influxdb',
                'Bad status code {}: {}'.format(r.status_code, r.text)
            )

    def delete(self):
        url = '{}/api/v2/orgs/{}'.format(self.api_url, self.id)
        r = requests.delete(url, headers=self.headers)

        if r.status_code != 204:
            raise Exception(
                'Influxdb',
                'Bad status code {}: {}'.format(r.status_code, r.text)
            )

    def update(self, description):
        url = '{}/api/v2/orgs/{}'.format(self.api_url, self.id)
        r = requests.patch(
            url,
            headers=self.headers,
            json={'name': self.name, 'description': description}
        )

        if r.status_code != 200:
            raise Exception(
                'Influxdb',
                'Bad status code {}: {}'.format(r.status_code, r.text)
            )


def main():
    fields = {
        'name':        {'type': 'str', 'required': True},
        'description': {'type': 'str', 'default': ''},
        'api_url':     {'type': 'str', 'default': 'http://127.0.0.1:8086'},
        'api_token':   {'type': 'str', 'required': True},
        'state':       {'type': 'str',
                        'default': 'present',
                        'choice': ['present', 'absent']},
    }
    module = AnsibleModule(argument_spec=fields)

    org = InfluxdbOrg(
        module.params['api_url'],
        module.params['api_token'],
        module.params['name'],
    )
    changed = False

    if org.exists():
        if module.params['state'] == 'absent':
            org.delete()
            changed = True
        elif org.has_changed(module.params['description']):
            org.update(module.params['description'])
            changed = True
    elif module.params['state'] == 'present':
        org.create(module.params['description'])
        changed = True

    module.exit_json(changed=changed)


if __name__ == '__main__':
    main()