from __future__ import annotations

import logging
import traceback
from contextlib import asynccontextmanager
from pathlib import Path
from typing import Any, AsyncIterator, Awaitable, Callable, Dict, List, Optional, Tuple, Type, TypeVar

from aiohttp import ClientConnectorError

from chik.daemon.keychain_proxy import KeychainProxy, connect_to_keychain_and_validate
from chik.rpc.data_layer_rpc_client import DataLayerRpcClient
from chik.rpc.farmer_rpc_client import FarmerRpcClient
from chik.rpc.full_node_rpc_client import FullNodeRpcClient
from chik.rpc.harvester_rpc_client import HarvesterRpcClient
from chik.rpc.rpc_client import RpcClient
from chik.rpc.wallet_rpc_client import WalletRpcClient
from chik.simulator.simulator_full_node_rpc_client import SimulatorFullNodeRpcClient
from chik.types.blockchain_format.sized_bytes import bytes32
from chik.types.mempool_submission_status import MempoolSubmissionStatus
from chik.util.config import load_config
from chik.util.default_root import DEFAULT_ROOT_PATH
from chik.util.ints import uint16
from chik.util.keychain import KeyData
from chik.wallet.transaction_record import TransactionRecord

NODE_TYPES: Dict[str, Type[RpcClient]] = {
    "farmer": FarmerRpcClient,
    "wallet": WalletRpcClient,
    "full_node": FullNodeRpcClient,
    "harvester": HarvesterRpcClient,
    "data_layer": DataLayerRpcClient,
    "simulator": SimulatorFullNodeRpcClient,
}

node_config_section_names: Dict[Type[RpcClient], str] = {
    FarmerRpcClient: "farmer",
    WalletRpcClient: "wallet",
    FullNodeRpcClient: "full_node",
    HarvesterRpcClient: "harvester",
    DataLayerRpcClient: "data_layer",
    SimulatorFullNodeRpcClient: "full_node",
}


_T_RpcClient = TypeVar("_T_RpcClient", bound=RpcClient)


def transaction_submitted_msg(tx: TransactionRecord) -> str:
    sent_to = [MempoolSubmissionStatus(s[0], s[1], s[2]).to_json_dict_convenience() for s in tx.sent_to]
    return f"Transaction submitted to nodes: {sent_to}"


def transaction_status_msg(fingerprint: int, tx_id: bytes32) -> str:
    return f"Run 'chik wallet get_transaction -f {fingerprint} -tx 0x{tx_id}' to get status"


async def validate_client_connection(
    rpc_client: RpcClient,
    node_type: str,
    rpc_port: int,
    consume_errors: bool = True,
) -> bool:
    connected: bool = True
    try:
        await rpc_client.healthz()
    except ClientConnectorError:
        if not consume_errors:
            raise
        connected = False
        print(f"Connection error. Check if {node_type.replace('_', ' ')} rpc is running at {rpc_port}")
        print(f"This is normal if {node_type.replace('_', ' ')} is still starting up")
    return connected


@asynccontextmanager
async def get_any_service_client(
    client_type: Type[_T_RpcClient],
    rpc_port: Optional[int] = None,
    root_path: Path = DEFAULT_ROOT_PATH,
    consume_errors: bool = True,
) -> AsyncIterator[Tuple[Optional[_T_RpcClient], Dict[str, Any]]]:
    """
    Yields a tuple with a RpcClient for the applicable node type a dictionary of the node's configuration,
    and a fingerprint if applicable. However, if connecting to the node fails then we will return None for
    the RpcClient.
    """

    node_type = node_config_section_names.get(client_type)
    if node_type is None:
        # Click already checks this, so this should never happen
        raise ValueError(f"Invalid client type requested: {client_type.__name__}")
    # load variables from config file
    config = load_config(root_path, "config.yaml", fill_missing_services=issubclass(client_type, DataLayerRpcClient))
    self_hostname = config["self_hostname"]
    if rpc_port is None:
        rpc_port = config[node_type]["rpc_port"]
    # select node client type based on string
    node_client = await client_type.create(self_hostname, uint16(rpc_port), root_path, config)
    try:
        # check if we can connect to node
        connected = await validate_client_connection(node_client, node_type, rpc_port, consume_errors)
        if connected:
            yield node_client, config
        else:
            yield None, config
    except Exception as e:  # this is only here to make the errors more user-friendly.
        if not consume_errors:
            raise
        print(f"Exception from '{node_type}' {e}:\n{traceback.format_exc()}")

    finally:
        node_client.close()  # this can run even if already closed, will just do nothing.
        await node_client.await_closed()


async def get_wallet(root_path: Path, wallet_client: WalletRpcClient, fingerprint: Optional[int]) -> Optional[int]:
    selected_fingerprint: Optional[int] = None
    keychain_proxy: Optional[KeychainProxy] = None
    all_keys: List[KeyData] = []

    try:
        if fingerprint is not None:
            selected_fingerprint = fingerprint
        else:
            keychain_proxy = await connect_to_keychain_and_validate(root_path, log=logging.getLogger(__name__))
            if keychain_proxy is None:
                raise RuntimeError("Failed to connect to keychain")
            # we're only interested in the fingerprints and labels
            all_keys = await keychain_proxy.get_keys(include_secrets=False)
            # we don't immediately close the keychain proxy connection because it takes a noticeable amount of time
            fingerprints = [key.fingerprint for key in all_keys]
            if len(fingerprints) == 0:
                print("No keys loaded. Run 'chik keys generate' or import a key")
            elif len(fingerprints) == 1:
                # if only a single key is available, select it automatically
                selected_fingerprint = fingerprints[0]

        if selected_fingerprint is None and len(all_keys) > 0:
            logged_in_fingerprint: Optional[int] = await wallet_client.get_logged_in_fingerprint()
            logged_in_key: Optional[KeyData] = None
            if logged_in_fingerprint is not None:
                logged_in_key = next((key for key in all_keys if key.fingerprint == logged_in_fingerprint), None)
            current_sync_status: str = ""
            indent = "   "
            if logged_in_key is not None:
                if await wallet_client.get_synced():
                    current_sync_status = "Synced"
                elif await wallet_client.get_sync_status():
                    current_sync_status = "Syncing"
                else:
                    current_sync_status = "Not Synced"

                print()
                print("Active Wallet Key (*):")
                print(f"{indent}{'-Fingerprint:'.ljust(23)} {logged_in_key.fingerprint}")
                if logged_in_key.label is not None:
                    print(f"{indent}{'-Label:'.ljust(23)} {logged_in_key.label}")
                print(f"{indent}{'-Sync Status:'.ljust(23)} {current_sync_status}")
            max_key_index_width = 5  # e.g. "12) *", "1)  *", or "2)   "
            max_fingerprint_width = 10  # fingerprint is a 32-bit number
            print()
            print("Wallet Keys:")
            for i, key in enumerate(all_keys):
                key_index_str = f"{(str(i + 1) + ')'):<4}"
                key_index_str += "*" if key.fingerprint == logged_in_fingerprint else " "
                print(
                    f"{key_index_str:<{max_key_index_width}} "
                    f"{key.fingerprint:<{max_fingerprint_width}}"
                    f"{(indent + key.label) if key.label else ''}"
                )
            val = None
            prompt: str = (
                f"Choose a wallet key [1-{len(fingerprints)}] ('q' to quit, or Enter to use {logged_in_fingerprint}): "
            )
            while val is None:
                val = input(prompt)
                if val == "q":
                    break
                elif val == "" and logged_in_fingerprint is not None:
                    fingerprint = logged_in_fingerprint
                    break
                elif not val.isdigit():
                    val = None
                else:
                    index = int(val) - 1
                    if index < 0 or index >= len(fingerprints):
                        print("Invalid value")
                        val = None
                        continue
                    else:
                        fingerprint = fingerprints[index]

            selected_fingerprint = fingerprint

        if selected_fingerprint is not None:
            log_in_response = await wallet_client.log_in(selected_fingerprint)

            if log_in_response["success"] is False:
                print(f"Login failed for fingerprint {selected_fingerprint}: {log_in_response}")
                selected_fingerprint = None
    finally:
        # Closing the keychain proxy takes a moment, so we wait until after the login is complete
        if keychain_proxy is not None:
            await keychain_proxy.close()

    return selected_fingerprint


async def execute_with_wallet(
    wallet_rpc_port: Optional[int],
    fingerprint: int,
    extra_params: Dict[str, Any],
    function: Callable[[Dict[str, Any], WalletRpcClient, int], Awaitable[None]],
) -> None:
    async with get_any_service_client(WalletRpcClient, wallet_rpc_port) as (wallet_client, _):
        if wallet_client is None:
            return

        new_fp = await get_wallet(DEFAULT_ROOT_PATH, wallet_client, fingerprint)
        if new_fp is None:
            return

        await function(extra_params, wallet_client, new_fp)
