# import tomllib
import argparse
import json
import logging
import requests
import os
import toml

from mastodon_blocklist_deploy.models import Instance


def load_blocklist_file(filename: str) -> [Instance]:
    with open(filename, "r") as f:
        data = toml.load(f)
    instances = []
    for instance_dict in data["instances"]:
        instance = Instance(instance_dict)
        instances.append(instance)
    return instances


def blocklist_json_to_instances(blocklist_json: str) -> [Instance]:
    instances = []
    for i in blocklist_json:
        instances.append(Instance(i))
    return instances


def load_blocklist_from_instance(server: str, token: str) -> [Instance]:
    headers = {
        f'Authorization': f'Bearer {token}',
    }

    response = requests.get(f'https://{server}/api/v1/admin/domain_blocks', headers=headers)
    if response.status_code == 200:
        blocklist_json = json.loads(response.content)
        return blocklist_json_to_instances(blocklist_json)
    else:
        raise ConnectionError(f"Could not connect to the server ({response.status_code}: {response.reason})")


def cli():
    parser = argparse.ArgumentParser(description='Deploy blocklist updates to a mastodon server')
    parser.add_argument('action', choices=['diff', 'deploy', 'export'],
                        help="Either use 'diff' to check the difference between local blockĺist and the blocklist on "
                             "the server, 'deploy' to apply the current local blocklist or 'export' to export the remote "
                             "blocklist into a local file.")
    parser.add_argument('-s', '--server', help="The address of the server where you want to deploy (e.g. "
                                               "mastodon.social)")
    parser.add_argument('-t', '--token', help="Authorization token")
    parser.add_argument('-i', '--input-file', help="The blocklist to use")
    parser.add_argument('-r', '--remote-blocklist', help="The remote blocklist as json for debugging reasons")
    parser.add_argument('-o', '--output', help="Filename where to export the blocklist")
    parser.add_argument('-v', '--verbose', action='store_true')
    parser.add_argument('-n', '--no-delete', action='store_true', help="Do not delete existing blocks")
    args = parser.parse_args()
    if args.verbose:
        logging.basicConfig(level=logging.DEBUG)
    else:
        logging.basicConfig(level=logging.WARN)

    if args.token:
        token = args.token
    else:
        token = os.getenv('MBD_TOKEN')

    """if there is a remote blocklist provided load this instead of fetching it from a server (for debugging reasons)"""
    if args.remote_blocklist:
        with open(args.remote_blocklist) as f:
            remote_blocklist = blocklist_json_to_instances(json.load(f))
    else:
        remote_blocklist = load_blocklist_from_instance(server=args.server, token=token)

    """Load local blocklist only when needed"""
    if args.action in ["diff", "deploy"]:
        if args.input_file:
            blocklist_filename = args.input_file
        else:
            blocklist_filename = "../blocklist.toml"
        try:
            local_blocklist = load_blocklist_file(blocklist_filename)
        except FileNotFoundError:
            print("Local blocklist file was not found. Make sure to specify it's location via -i")
            exit()

    if args.action == "diff":
        Instance.show_diffs(local_blocklist, remote_blocklist)
    elif args.action == "deploy":
        diffs = Instance.list_diffs(local_blocklist, remote_blocklist)
        Instance.apply_blocks_from_diff(diffs, args.server, token, args.no_delete)
    elif args.action == "export":
        if not args.output:
            print(toml.dumps({"instances": [b.exportable_dict for b in remote_blocklist]}))
        else:
            with open(args.output, "w") as f:
                toml.dump({"instances": [b.exportable_dict for b in remote_blocklist]}, f)


if __name__ == "__main__":
    cli()