from __future__ import annotations

import asyncio
import os
import sys
from pathlib import Path, PureWindowsPath
from random import randint
from typing import Any, Dict, List, Optional

from aiohttp import ClientConnectorError
from blspy import PrivateKey

from chik.cmds.cmds_util import get_any_service_client
from chik.cmds.start_funcs import async_start
from chik.consensus.coinbase import create_puzzlehash_for_pk
from chik.simulator.simulator_full_node_rpc_client import SimulatorFullNodeRpcClient
from chik.types.blockchain_format.sized_bytes import bytes32
from chik.types.coin_record import CoinRecord
from chik.util.bech32m import decode_puzzle_hash, encode_puzzle_hash
from chik.util.config import load_config, save_config
from chik.util.errors import KeychainFingerprintExists
from chik.util.ints import uint32
from chik.util.keychain import Keychain, bytes_to_mnemonic
from chik.wallet.derive_keys import (
    master_sk_to_farmer_sk,
    master_sk_to_pool_sk,
    master_sk_to_wallet_sk,
    master_sk_to_wallet_sk_unhardened,
)


def get_ph_from_fingerprint(fingerprint: int, key_id: int = 1) -> bytes32:
    priv_key_and_entropy = Keychain().get_private_key_by_fingerprint(fingerprint)
    if priv_key_and_entropy is None:
        raise Exception("Fingerprint not found")
    private_key = priv_key_and_entropy[0]
    sk_for_wallet_id: PrivateKey = master_sk_to_wallet_sk(private_key, uint32(key_id))
    puzzle_hash: bytes32 = create_puzzlehash_for_pk(sk_for_wallet_id.get_g1())
    return puzzle_hash


def create_chik_directory(
    chik_root: Path,
    fingerprint: int,
    farming_address: Optional[str],
    plot_directory: Optional[str],
    auto_farm: Optional[bool],
    docker_mode: bool,
) -> Dict[str, Any]:
    """
    This function creates a new chik directory and returns a heavily modified config,
    suitable for use in the simulator.
    """
    from chik.cmds.init_funcs import chik_init

    if not chik_root.is_dir() or not Path(chik_root / "config" / "config.yaml").exists():
        # create chik directories & load config
        chik_init(chik_root, testnet=True, fix_ssl_permissions=True)
        config: Dict[str, Any] = load_config(chik_root, "config.yaml")
        # apply standard block-tools config.
        config["full_node"]["send_uncompact_interval"] = 0
        config["full_node"]["target_uncompact_proofs"] = 30
        config["full_node"]["peer_connect_interval"] = 50
        config["full_node"]["sanitize_weight_proof_only"] = False
        config["logging"]["log_level"] = "INFO"  # extra logs for easier development
        # make sure we don't try to connect to other nodes.
        config["full_node"]["introducer_peer"] = None
        config["wallet"]["introducer_peer"] = None
        config["full_node"]["dns_servers"] = []
        config["wallet"]["dns_servers"] = []
        # create custom testnet (simulator0)
        config["network_overrides"]["constants"]["simulator0"] = config["network_overrides"]["constants"][
            "testnet0"
        ].copy()
        config["network_overrides"]["config"]["simulator0"] = config["network_overrides"]["config"]["testnet0"].copy()
        sim_genesis = "eb8c4d20b322be8d9fddbf9412016bdffe9a2901d7edb0e364e94266d0e095f7"
        config["network_overrides"]["constants"]["simulator0"]["GENESIS_CHALLENGE"] = sim_genesis
        # tell services to use simulator0
        config["selected_network"] = "simulator0"
        config["wallet"]["selected_network"] = "simulator0"
        config["full_node"]["selected_network"] = "simulator0"
        if not docker_mode:  # We want predictable ports for our docker image.
            # set ports and networks, we don't want to cause a port conflict.
            port_offset = randint(1, 20000)
            config["daemon_port"] -= port_offset
            config["network_overrides"]["config"]["simulator0"]["default_full_node_port"] = 39678 + port_offset
            # wallet
            config["wallet"]["port"] += port_offset
            config["wallet"]["rpc_port"] += port_offset
            # full node
            config["full_node"]["port"] -= port_offset
            config["full_node"]["rpc_port"] += port_offset
            # connect wallet to full node
            config["wallet"]["full_node_peer"]["port"] = config["full_node"]["port"]
            config["full_node"]["wallet_peer"]["port"] = config["wallet"]["port"]
            # ui
            config["ui"]["daemon_port"] = config["daemon_port"]
        else:
            config["self_hostname"] = "0.0.0.0"  # Bind to all interfaces.
            config["logging"]["log_stdout"] = True  # Log to console.
    else:
        config = load_config(chik_root, "config.yaml")
    # simulator overrides
    config["simulator"]["key_fingerprint"] = fingerprint
    if farming_address is None:
        prefix = config["network_overrides"]["config"]["simulator0"]["address_prefix"]
        farming_address = encode_puzzle_hash(get_ph_from_fingerprint(fingerprint), prefix)
    config["simulator"]["farming_address"] = farming_address
    if plot_directory is not None:
        config["simulator"]["plot_directory"] = plot_directory
    # Temporary change to fix win / linux differences.
    config["simulator"]["plot_directory"] = str(Path(config["simulator"]["plot_directory"]))
    if "//" in config["simulator"]["plot_directory"] and os.name != "nt":
        # if we're on linux, we need to convert to a linux path.
        config["simulator"]["plot_directory"] = str(PureWindowsPath(config["simulator"]["plot_directory"]).as_posix())
    config["simulator"]["auto_farm"] = auto_farm if auto_farm is not None else True
    farming_ph = decode_puzzle_hash(farming_address)
    # modify genesis block to give the user the reward
    simulator_consts = config["network_overrides"]["constants"]["simulator0"]
    simulator_consts["GENESIS_PRE_FARM_FARMER_PUZZLE_HASH"] = farming_ph.hex()
    simulator_consts["GENESIS_PRE_FARM_POOL_PUZZLE_HASH"] = farming_ph.hex()
    # save config and return the config
    save_config(chik_root, "config.yaml", config)
    return config


def display_key_info(fingerprint: int, prefix: str) -> None:
    """
    Display key info for a given fingerprint, similar to the output of `chik keys show`.
    """
    print(f"Using fingerprint {fingerprint}")
    private_key_and_seed = Keychain().get_private_key_by_fingerprint(fingerprint)
    if private_key_and_seed is None:
        print(f"Fingerprint {fingerprint} not found")
        return
    sk, seed = private_key_and_seed
    print("\nFingerprint:", sk.get_g1().get_fingerprint())
    print("Master public key (m):", sk.get_g1())
    print("Farmer public key (m/12381/8444/0/0):", master_sk_to_farmer_sk(sk).get_g1())
    print("Pool public key (m/12381/8444/1/0):", master_sk_to_pool_sk(sk).get_g1())
    first_wallet_sk: PrivateKey = master_sk_to_wallet_sk_unhardened(sk, uint32(0))
    wallet_address: str = encode_puzzle_hash(create_puzzlehash_for_pk(first_wallet_sk.get_g1()), prefix)
    print(f"First wallet address: {wallet_address}")
    assert seed is not None
    print("Master private key (m):", bytes(sk).hex())
    print("First wallet secret key (m/12381/8444/2/0):", master_sk_to_wallet_sk(sk, uint32(0)))
    mnemonic = bytes_to_mnemonic(seed)
    print("  Mnemonic seed (24 secret words):")
    print(f"{mnemonic} \n")


def generate_and_return_fingerprint(mnemonic: Optional[str] = None) -> int:
    """
    Generate and add new PrivateKey and return its fingerprint.
    """
    from chik.util.keychain import generate_mnemonic

    if mnemonic is None:
        print("Generating private key")
        mnemonic = generate_mnemonic()
    try:
        sk = Keychain().add_private_key(mnemonic, None)
        fingerprint: int = sk.get_g1().get_fingerprint()
    except KeychainFingerprintExists as e:
        fingerprint = e.fingerprint
        print(f"Fingerprint: {fingerprint} for provided private key already exists.")
        return fingerprint
    print(f"Added private key with public key fingerprint {fingerprint}")
    return fingerprint


def select_fingerprint(
    fingerprint: Optional[int] = None, mnemonic_string: Optional[str] = None, auto_generate_key: bool = False
) -> Optional[int]:
    """
    Either select an existing fingerprint or create one and return it.
    """
    if mnemonic_string:
        fingerprint = generate_and_return_fingerprint(mnemonic_string)
    fingerprints: list[int] = [pk.get_fingerprint() for pk in Keychain().get_all_public_keys()]
    if fingerprint is not None and fingerprint in fingerprints:
        return fingerprint
    elif fingerprint is not None and fingerprint not in fingerprints:
        print(f"Invalid Fingerprint. Fingerprint {fingerprint} was not found.")
        return None
    if auto_generate_key and len(fingerprints) == 1:
        return fingerprints[0]
    if len(fingerprints) == 0:
        if not auto_generate_key:
            if (
                input("No keys in keychain. Press 'q' to quit, or press any other key to generate a new key.").lower()
                == "q"
            ):
                return None
        # generate private key and add to wallet
        fingerprint = generate_and_return_fingerprint()
    else:
        print("Fingerprints:")
        print(
            "If you already used one of these keys, select that fingerprint to skip the plotting process."
            " Otherwise, select any key below."
        )
        for i, fp in enumerate(fingerprints):
            row: str = f"{i + 1}) "
            row += f"{fp}"
            print(row)
        val = None
        prompt: str = f"Choose a simulator key [1-{len(fingerprints)}] ('q' to quit, or 'g' to generate a new key): "
        while val is None:
            val = input(prompt)
            if val == "q":
                return None
            elif val == "g":
                fingerprint = generate_and_return_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]
        assert fingerprint is not None
    return fingerprint


async def generate_plots(config: Dict[str, Any], root_path: Path, fingerprint: int, bitfield: bool) -> None:
    """
    Pre-Generate plots for the new simulator instance.
    """

    from chik.simulator.block_tools import BlockTools, test_constants
    from chik.simulator.start_simulator import PLOT_SIZE, PLOTS

    farming_puzzle_hash = decode_puzzle_hash(config["simulator"]["farming_address"])
    os.environ["CHIK_ROOT"] = str(root_path)  # change env variable, to make it match what the daemon would set it to

    # create block tools and use local keychain
    bt = BlockTools(
        test_constants,
        root_path,
        automated_testing=False,
        plot_dir=config["simulator"].get("plot_directory", "plots"),
        keychain=Keychain(),
    )
    await bt.setup_keys(fingerprint=fingerprint, reward_ph=farming_puzzle_hash)
    existing_plots = await bt.setup_plots(
        num_og_plots=PLOTS, num_pool_plots=0, num_non_keychain_plots=0, plot_size=PLOT_SIZE, bitfield=bitfield
    )
    print(f"{'New plots generated.' if existing_plots else 'Using Existing Plots'}\n")


async def get_current_height(root_path: Path) -> int:
    async with get_any_service_client(SimulatorFullNodeRpcClient, root_path=root_path, consume_errors=False) as (
        node_client,
        _,
    ):
        num_blocks = len(await node_client.get_all_blocks())
    return num_blocks


async def async_config_wizard(
    root_path: Path,
    fingerprint: Optional[int],
    farming_address: Optional[str],
    plot_directory: Optional[str],
    mnemonic_string: Optional[str],
    auto_farm: Optional[bool],
    docker_mode: bool,
    bitfield: bool,
) -> None:
    # either return passed through fingerprint or get one
    fingerprint = select_fingerprint(fingerprint, mnemonic_string, docker_mode)
    if fingerprint is None:
        # user cancelled wizard
        return
    # create chik directory & get config.
    print("Creating chik directory & config...")
    config = create_chik_directory(root_path, fingerprint, farming_address, plot_directory, auto_farm, docker_mode)
    # Pre-generate plots by running block_tools init functions.
    print("Please Wait, Generating plots...")
    print("This may take up to a minute if you are on a slow machine")

    await generate_plots(config, root_path, fingerprint, bitfield)
    # final messages
    final_farming_address = config["simulator"]["farming_address"]
    print(f"\nFarming & Prefarm reward address: {final_farming_address}\n")
    print("Configuration Wizard Complete.")
    print("Starting Simulator now...\n\n")

    sys.argv[0] = str(Path(sys.executable).parent / "chik")  # fix path for tests
    await async_start(root_path, config, ("simulator",), False)

    # now we make sure the simulator has a genesis block
    print("Please wait, generating genesis block.")
    while True:
        try:
            num_blocks: int = await get_current_height(root_path)
        except ClientConnectorError:
            await asyncio.sleep(0.25)
        else:
            if num_blocks == 0:
                await farm_blocks(None, root_path, 1, True, final_farming_address)
                print("Genesis block generated, exiting.")
            else:
                print("Genesis block already exists, exiting.")
            break
    print(f"\nMake sure your CHIK_ROOT Environment Variable is set to: {root_path}")


def print_coin_record(
    name: str,
    address_prefix: str,
    coin_record: CoinRecord,
) -> None:
    from datetime import datetime

    coin_address = encode_puzzle_hash(coin_record.coin.puzzle_hash, address_prefix)
    print(f"Coin 0x{coin_record.name.hex()}")
    print(f"Wallet Address: {coin_address}")
    print(f"Confirmed at block: {coin_record.confirmed_block_index}")
    print(f"Spent: {f'at Block {coin_record.spent_block_index}' if coin_record.spent else 'No'}")
    print(f"Coin Amount: {coin_record.coin.amount} {name}")
    print(f"Parent Coin ID: 0x{coin_record.coin.parent_coin_info.hex()}")
    print(f"Created at: {datetime.fromtimestamp(float(coin_record.timestamp)).strftime('%Y-%m-%d %H:%M:%S')}\n")


async def print_coin_records(
    config: Dict[str, Any],
    node_client: SimulatorFullNodeRpcClient,
    include_reward_coins: bool,
    include_spent: bool = False,
) -> None:
    import sys

    coin_records: List[CoinRecord] = await node_client.get_all_coins(include_spent)
    coin_records = [coin_record for coin_record in coin_records if not coin_record.coinbase or include_reward_coins]
    address_prefix = config["network_overrides"]["config"][config["selected_network"]]["address_prefix"]
    name = "mojo"
    paginate = False  # I might change this later.
    if len(coin_records) != 0:
        print("All Coins: ")
        if paginate is True:
            paginate = sys.stdout.isatty()
        num_per_screen = 5 if paginate else len(coin_records)
        # ripped from cmds/wallet_funcs.
        for i in range(0, len(coin_records), num_per_screen):
            for j in range(0, num_per_screen):
                if i + j >= len(coin_records):
                    break
                print_coin_record(
                    coin_record=coin_records[i + j],
                    name=name,
                    address_prefix=address_prefix,
                )
            if i + num_per_screen <= len(coin_records) and paginate:
                print("Press q to quit, or c to continue")
                while True:
                    entered_key = sys.stdin.read(1)
                    if entered_key == "q":
                        return None
                    elif entered_key == "c":
                        break


async def print_wallets(config: Dict[str, Any], node_client: SimulatorFullNodeRpcClient) -> None:
    ph_and_amount = await node_client.get_all_puzzle_hashes()
    address_prefix = config["network_overrides"]["config"][config["selected_network"]]["address_prefix"]
    name = "mojo"
    for puzzle_hash, (amount, num_tx) in ph_and_amount.items():
        address = encode_puzzle_hash(puzzle_hash, address_prefix)
        print(f"Address: {address} has a balance of: {amount} {name}, with a total of: {num_tx} transactions.\n")


async def print_status(
    rpc_port: Optional[int],
    root_path: Path,
    fingerprint: Optional[int],
    show_key: bool,
    show_coins: bool,
    include_reward_coins: bool,
    show_addresses: bool,
) -> None:
    """
    This command allows users to easily get the status of the simulator
    and information about the state of and the coins in the simulated blockchain.
    """
    from chik.cmds.show_funcs import print_blockchain_state
    from chik.cmds.units import units

    async with get_any_service_client(SimulatorFullNodeRpcClient, rpc_port, root_path) as (node_client, config):
        # Display keychain info
        if show_key:
            if fingerprint is None:
                fingerprint = config["simulator"]["key_fingerprint"]
            if fingerprint is not None:
                display_key_info(
                    fingerprint, config["network_overrides"]["config"][config["selected_network"]]["address_prefix"]
                )
            else:
                print(
                    "No fingerprint in config, either rerun 'cdv sim create' "
                    "or use --fingerprint to specify one, skipping key information."
                )
        # chain status ( basically chik show -s)
        await print_blockchain_state(node_client, config)
        print("")
        # farming information
        target_ph: bytes32 = await node_client.get_farming_ph()
        farming_coin_records = await node_client.get_coin_records_by_puzzle_hash(target_ph, False)
        prefix = config["network_overrides"]["config"][config["selected_network"]]["address_prefix"]
        print(
            f"Current Farming address: {encode_puzzle_hash(target_ph, prefix)}, "
            f"with a balance of: "
            f"{sum(coin_records.coin.amount for coin_records in farming_coin_records) / units['chik']} TXCK."
        )
        if show_addresses:
            print("All Addresses: ")
            await print_wallets(config, node_client)
        if show_coins:
            await print_coin_records(config, node_client, include_reward_coins)


async def revert_block_height(
    rpc_port: Optional[int],
    root_path: Path,
    num_blocks: int,
    num_new_blocks: int,
    reset_chain_to_genesis: bool,
    use_revert_blocks: bool,
) -> None:
    """
    This function allows users to easily revert the chain to a previous state or perform a reorg.
    """
    async with get_any_service_client(SimulatorFullNodeRpcClient, rpc_port, root_path) as (node_client, _):
        if use_revert_blocks:
            if num_new_blocks != 1:
                print(f"Ignoring num_new_blocks: {num_new_blocks}, because we are not performing a reorg.")
            # in this case num_blocks is the number of blocks to delete
            new_height: int = await node_client.revert_blocks(num_blocks, reset_chain_to_genesis)
            print(
                f"All transactions in Block: {new_height + num_blocks} and above were successfully deleted, "
                "you should now delete & restart all wallets."
            )
        else:
            # However, in this case num_blocks is the fork height.
            new_height = await node_client.reorg_blocks(num_blocks, num_new_blocks, use_revert_blocks)
            old_height = new_height - num_new_blocks
            print(f"All transactions in Block: {old_height - num_blocks} and above were successfully reverted.")
        print(f"Block Height is now: {new_height}")


async def farm_blocks(
    rpc_port: Optional[int],
    root_path: Path,
    num_blocks: int,
    transaction_blocks: bool,
    target_address: str,
) -> None:
    """
    This function is used to generate new blocks.
    """
    async with get_any_service_client(SimulatorFullNodeRpcClient, rpc_port, root_path) as (node_client, config):
        if target_address == "":
            target_address = config["simulator"]["farming_address"]
        if target_address is None:
            print(
                "No target address in config, falling back to the temporary address currently in use. "
                "You can use 'cdv sim create' or use --target-address to specify a different address."
            )
            target_ph: bytes32 = await node_client.get_farming_ph()
        else:
            target_ph = decode_puzzle_hash(target_address)
        await node_client.farm_block(target_ph, num_blocks, transaction_blocks)
        print(f"Farmed {num_blocks}{' Transaction' if transaction_blocks else ''} blocks")
        block_height = (await node_client.get_blockchain_state())["peak"].height
        print(f"Block Height is now: {block_height}")


async def set_auto_farm(rpc_port: Optional[int], root_path: Path, set_autofarm: bool) -> None:
    """
    This function can be used to enable or disable Auto Farming.
    """
    async with get_any_service_client(SimulatorFullNodeRpcClient, rpc_port, root_path) as (node_client, _):
        current = await node_client.get_auto_farming()
        if current == set_autofarm:
            print(f"Auto farming is already {'on' if set_autofarm else 'off'}")
            return
        result = await node_client.set_auto_farming(set_autofarm)
        print(f"Auto farming is now {'on' if result else 'off'}")
