import logging

import requests

from typing import Dict, Union


class Instance:
    def __init__(self, instance_dict : Dict):
        """If obfuscate, reject_media or reject_reports are not specified default to False"""
        self.severity: str = "suspend"
        self.obfuscate: bool = False
        self.reject_media: bool = False
        self.reject_reports: bool = False
        self.id: Union[int, None] = None
        self.domain: str = ""
        self.private_comment: str = ""
        self.public_comment: str = ""

        self.parse_block(instance_dict)

    def __str__(self):
        return f"{self.domain}: {self.severity}"

    def __eq__(self, other):
        return self.domain == other.domain and self.severity == other.severity and self.reject_media == other.reject_media and self.reject_reports == other.reject_reports and self.obfuscate == other.obfuscate

    def status_str(self):
        return f"{self.severity}\nReject reports: {self.reject_reports}\nReject media: {self.reject_media}\nObfuscate: {self.obfuscate}"

    def as_dict(self, private=False):
        keys = ["domain", "severity", "public_comment", "obfuscate", "reject_media", "reject_reports"]
        if private:
            keys.append("private_comment")
        exportable = {}
        for key in keys:
            exportable[key] = getattr(self, key)
        return exportable

    def parse_block(self, instance_dict):
        # this specifies possible properties and default values if not found on the remote source. If a default is None
        # the value is required and the parse will fail
        properties_and_defaults = [("domain", None), ("severity", "suspend"), ("public_comment", ""),
                                   ("private_comment", ""), ("obfuscate", False), ("reject_media", False),
                                   ("reject_reports", False)]
        for key, default in properties_and_defaults:
            try:
                setattr(self, key, instance_dict[key])
            except KeyError:
                if default is not None:
                    setattr(self, key, default)
                else:
                    raise KeyError(f"The key {key} was not in the instance_dict response.")

    def apply(self, server, token, block_id=None):
        """Applies instance block on the remote server"""
        headers = {
            f'Authorization': f'Bearer {token}',
        }
        # As long as we generate this enside of apply we cannot properly test for the correct format
        data = {"domain": self.domain,
                "severity": self.severity,
                "reject_media": str(self.reject_media).lower(),
                "reject_reports": str(self.reject_reports).lower(),
                "private_comment": str(self.private_comment).lower(),
                "public_comment": self.public_comment,
                "obfuscate": str(self.obfuscate).lower()}
        """If no id is given add a new block, else update the existing block"""
        if block_id is None:
            response = requests.post(f'https://{server}/api/v1/admin/domain_blocks', data=data, headers=headers)
        else:
            response = requests.put(f'https://{server}/api/v1/admin/domain_blocks/{block_id}', data=data,
                                    headers=headers)
        if response.status_code != 200:
            raise ConnectionError(f"Could not apply block for {self.domain} ({response.status_code}: {response.reason})")

    def delete(self, server: str, token: str):
        """Deletes the instance from the blocklist on the remote server"""
        headers = {
            f'Authorization': f'Bearer {token}',
        }
        response = requests.delete(f'https://{server}/api/v1/admin/domain_blocks/{self.id}', headers=headers)
        if response.status_code != 200:
            raise ConnectionError(f"Could not apply block ({response.status_code}: {response.reason})")

    @staticmethod
    def list_diffs(local_blocklist, remote_blocklist):
        """Compares the local and remote blocklist and returns a list of differences"""
        diffs = []
        for local_instance in local_blocklist:
            instance_found = False
            for idx, remote_instance in enumerate(remote_blocklist):
                if local_instance.domain == remote_instance.domain:
                    instance_found = True
                    if local_instance == remote_instance:
                        pass
                    else:
                        """If the local block is different from the remote block, add it to the diff"""
                        diffs.append({"local": local_instance, "remote": remote_instance})
                    """Remove the remote instance from the list so we later have a list of remote instances we don't
                    have locally"""
                    del remote_blocklist[idx]
            """If the local instance is not in the remote blocklist, add it to the diff"""
            if not instance_found:
                diffs.append({"local": local_instance, "remote": None})
        for remote_instance in remote_blocklist:
            diffs.append({"local": None, "remote": remote_instance})
        return diffs

    @staticmethod
    def apply_blocks_from_diff(diffs, server, token, no_delete: bool):
        """Uses a diff (list of difference in local an remote instance) to apply instance blocks"""
        for diff in diffs:
            if diff["local"] is None:
                if not no_delete:
                    """Delete the block on the remote server"""
                    diff['remote'].delete(server, token)
                    logging.info(f"Deleted {diff['remote'].domain} from blocklist")
            elif diff["remote"] is None:
                """Add the block on the remote server"""
                diff["local"].apply(server, token)
                logging.info(f"Added {diff['local'].domain} to blocklist")
            else:
                """Update the block on the remote server"""
                diff["local"].apply(server, token, block_id=diff["remote"].id)
                logging.info(f"Updated {diff['local'].domain} in blocklist")

    @staticmethod
    def show_diffs(local_blocklist, remote_blocklist):
        """Shows a table in the CLI comparing the local and remote blocklist"""
        from rich.table import Table
        from rich.console import Console
        table = Table(title="Differences", expand=True, show_lines=True)

        table.add_column("Domain", style="cyan")
        table.add_column("Local status", style="green")
        table.add_column("Current remote status", style="magenta")
        diffs = Instance.list_diffs(local_blocklist, remote_blocklist)
        for diff in diffs:
            if diff["local"] is None:
                table.add_row(diff["remote"].domain, None, diff["remote"].status_str())
            elif diff["remote"] is None:
                table.add_row(diff["local"].domain, diff["local"].status_str(), None)
            else:
                table.add_row(diff["local"].domain, diff["local"].status_str(), diff["remote"].status_str())
        console = Console()
        console.print(table)