"""
Reusable fixtures for deploying FrostFS components with all the dependencies.
"""

# TODO: This file is larger that desirable.
# TODO: If anyone knows how to break it into fixtures/base.py, fixtures/alphabet.py, fixtures/... - be my guest

import gzip
import importlib.resources
import json
import random
import re
import shlex
import shutil
import string
import subprocess
import tarfile
import tempfile
from base64 import b64decode
from collections.abc import Mapping
from enum import Enum
from itertools import chain
from pathlib import Path
from types import SimpleNamespace
from typing import List
from urllib.request import urlopen

import pytest
import yaml
from neo3.wallet.account import Account
from neo3.wallet.wallet import Wallet
from testcontainers.core.network import Network

from .container import ContainerizedService, ExecResult

_SCOPE = "session"
_PREFIX = "frostfs-"


glagolic = [
    "az",
    "buky",
    "vedi",
    "glagoli",
    "dobro",
    "yest",
    "zhivete",
    "dzelo",
    "zemlja",
    "izhe",
    "izhei",
    "gerv",
    "kako",
    "ljudi",
    "mislete",
    "nash",
    "on",
    "pokoj",
    "rtsi",
    "slovo",
    "tverdo",
    "uk",
]


class Component(Enum):

    ADM = "adm"
    ALPHABET = "alphabet"
    CONTRACT = "contract"
    HTTPGW = "httpgw"
    INNERRING = "innerring"
    LOCODE = "locode"
    NEOGO = "neogo"
    S3GW = "s3gw"
    STORAGE = "storage"

    def __str__(self):
        return self.value

    def __len__(self):
        return len(self.value)


@pytest.fixture(scope=_SCOPE)
def _deployment(_deployment_dir) -> dict:
    """
    Read deployment options from environment.

    DO NOT REFERENCE THIS FIXTURE DIRECTLY FROM TESTS!
    This fixture is to be referenced only from other *_deployment fixtures.

    Runtime overrides will not be applied to _deployment() -
    only to specific service fixtures, e.g. alphabet_deployment().
    """
    with importlib.resources.path("frostfs_testlib.component_tests.templates", ".") as template_dir:
        default = {
            "dir": _deployment_dir,
            "template": template_dir,
        }
        for service in Component:
            default[f"{service}_dir"] = _deployment_dir / str(service)
            default[f"{service}_template"] = template_dir / f"{service}.yml"
        config = {  # TODO: replace hardcoded values with reading from a config file
            "adm_image": "git.frostfs.info/truecloudlab/frostfs-adm",
            "adm_version": "0.44.9",
            "alphabet_foo": "bar",  # FIXME
            "alphabet_node_count": 4,
            "contract_archive_url": "https://git.frostfs.info/TrueCloudLab/frostfs-contract/releases/download/v{version}/frostfs-contract-v{version}.tar.gz",
            "contract_version": "0.21.1",
            "httpgw_image": "git.frostfs.info/truecloudlab/frostfs-http-gw",
            "httpgw_node_count": 3,
            "httpgw_version": "0.32.1-debian",  # TODO: none of the published images work: either POSIX shell is missing or CORS container is required
            "innerring_image": "git.frostfs.info/truecloudlab/frostfs-ir",
            "innerring_version": "0.44.9",
            "locode_archive_url": "https://git.frostfs.info/TrueCloudLab/frostfs-locode-db/releases/download/v{version}/locode_db.gz",
            "locode_version": "0.5.2",
            "neogo_image": "nspccdev/neo-go",
            "neogo_min_peers": 3,
            "neogo_version": "0.106.3",
            "storage_image": "git.frostfs.info/truecloudlab/frostfs-storage",
            "storage_node_count": 2,
            "storage_version": "0.44.9",
        }
        default.update(config)
        yield default


def _customizable_deployment(service: Component, _deployment, request):
    """Test fixture builder that allows overriding some deployment parameters later."""
    config = {}
    for key, value in _deployment.items():
        if not key.startswith(f"{service}_"):
            continue
        config[key[len(service) + 1 :]] = value
    override = getattr(request, "param", {})
    config.update(override)
    directory = config.get("dir")
    if directory:
        directory = Path(directory)
        basename = directory.name
        index = 0
        while directory.exists():
            index += 1
            directory = directory.with_name(basename + f"-{index}")
            config["dir"] = directory
        config["prefix"] = f"{directory.parent.name}-{directory.name}-"
    for key in ["dir", "template"]:
        if isinstance(config[key], str):
            config[key] = Path(config[key])
    return SimpleNamespace(**config)


def _customize_decorator(service: Component, options):
    """
    Test decorator that overrides deployment options for the specific service.

    Docs: https://docs.pytest.org/en/latest/example/parametrize.html#indirect-parametrization
    """
    return pytest.mark.parametrize(f"{service}_deployment", [options], indirect=[f"{service}_deployment"], ids=[f"custom_{service}"])


@pytest.fixture(scope=_SCOPE)
def alphabet_deployment(_deployment, request):
    """Alphabet node parameters."""
    return _customizable_deployment(Component.ALPHABET, _deployment, request)


def alphabet_customize(**options):
    """Test decorator that overrides deployment options for alphabet nodes."""
    return _customize_decorator(Component.ALPHABET, options)


@pytest.fixture(scope=_SCOPE)
def contract_deployment(_deployment, request):
    """Contract deployment parameters."""
    return _customizable_deployment(Component.CONTRACT, _deployment, request)


def contract_customize(**options):
    """Test decorator that overrides deployment options for frostfs-contracts."""
    return _customize_decorator(Component.CONTRACT, options)


@pytest.fixture(scope=_SCOPE)
def neogo_deployment(_deployment, request, alphabet_deployment):
    """neo-go deployment parameters."""
    deployment = _customizable_deployment(Component.NEOGO, _deployment, request)
    deployment.node_count = alphabet_deployment.node_count
    return deployment


def neogo_customize(**options):
    """Test decorator that overrides deployment options for neo-go nodes."""
    return _customize_decorator(Component.NEOGO, options)


@pytest.fixture(scope=_SCOPE)
def adm_deployment(_deployment, request):
    """Frostfs-adm container parameters."""
    return _customizable_deployment(Component.ADM, _deployment, request)


def adm_customize(**options):
    """Test decorator that overrides deployment options for frostfs-adm container."""
    return _customize_decorator(Component.ADM, options)


@pytest.fixture(scope=_SCOPE)
def locode_deployment(_deployment, request):
    """Frostfs locode database parameters."""
    return _customizable_deployment(Component.LOCODE, _deployment, request)


def locode_customize(**options):
    """Test decorator that overrides deployment options for frostfs-locode-db archive."""
    return _customize_decorator(Component.LOCODE, options)


@pytest.fixture(scope=_SCOPE)
def innerring_deployment(_deployment, request):
    """Innerring node parameters."""
    return _customizable_deployment(Component.INNERRING, _deployment, request)


def innerring_customize(**options):
    """Test decorator that overrides deployment options for innerring nodes."""
    return _customize_decorator(Component.INNERRING, options)


@pytest.fixture(scope=_SCOPE)
def storage_deployment(_deployment, request):
    """Storage node parameters."""
    return _customizable_deployment(Component.STORAGE, _deployment, request)


def storage_customize(**options):
    """Test decorator that overrides deployment options for storage nodes."""
    return _customize_decorator(Component.STORAGE, options)


@pytest.fixture(scope=_SCOPE)
def httpgw_deployment(_deployment, request):
    """HTTP gateway deployment parameters."""
    return _customizable_deployment(Component.HTTPGW, _deployment, request)


def httpgw_customize(**options):
    """Test decorator that overrides deployment options for HTTP gateways."""
    return _customize_decorator(Component.HTTPGW, options)


@pytest.fixture(scope=_SCOPE)
def _network():
    """Docker container network fixture. Should not be referenced directly from tests."""
    network = Network()
    network.name = f"{_PREFIX}{network.name}"
    network.create()
    yield network
    network.remove()


@pytest.fixture(scope=_SCOPE)
def _deployment_dir() -> Path:
    """Temporary directory for a dynamic deployment. Should not be referenced directly from tests."""
    tmp = Path(tempfile.mkdtemp(prefix=f"{_PREFIX}test-")).absolute()
    yield tmp
    shutil.rmtree(tmp)


@pytest.fixture(scope=_SCOPE)
def adm_config(alphabet_deployment):
    alphabet_deployment.dir.mkdir(mode=0o700, exist_ok=False)
    file = alphabet_deployment.dir / "_frostfs_adm.json"
    tree = {
        "alphabet-wallets": str(alphabet_deployment.dir),
        "credentials": {},
    }
    rnd = random.SystemRandom()
    for key in chain(["contract"], glagolic[: alphabet_deployment.node_count]):
        tree["credentials"][key] = "".join(rnd.choice(string.ascii_letters) for _ in range(12))
    with open(file, "w") as f:
        json.dump(tree, f, indent=True, sort_keys=True, ensure_ascii=False)
    yield tree, file
    shutil.rmtree(alphabet_deployment.dir)


@pytest.fixture(scope=_SCOPE)
def alphabet_wallets(alphabet_deployment, frostfs_adm):
    dest = alphabet_deployment.dir
    count = alphabet_deployment.node_count
    frostfs_adm(f"morph generate-alphabet --size {count}")
    frostfs_adm.fetch(dest, dest)
    pubkeys = _read_alphabet_public_keys(dest, count)
    return pubkeys, dest


def _read_alphabet_public_keys(directory, count) -> List[str]:
    public = []
    for index in range(count):
        letter = glagolic[index]
        file = directory / f"{letter}.json"
        public.append(_wallet_public_key(file))
    return public


def _wallet_address(path: Path, account=0) -> str:
    """Read account address from Neo NEP-6 wallet."""
    with open(path) as f:
        wallet = json.load(f)
    account = wallet["accounts"][account]
    return account["address"]


def _wallet_public_key(path: Path, account=0) -> str:
    """Read public key from Neo NEP-6 wallet."""
    with open(path) as f:
        wallet = json.load(f)
    account = wallet["accounts"][account]
    script = b64decode(account["contract"]["script"])
    if not _is_signature_contract(script):
        raise ValueError(f"not a signature contract: {account['contract']['script']}")
    return script[2:35].hex()


def _is_signature_contract(script: bytes) -> bool:
    """
    Test if the provided script is a (single) signature contract.

    Args:
        script: contract script.

    Copied from neo-mamba (neo3.contracts.utils.is_signature_contract).
    """

    PUSHDATA1 = 0x0C
    SYSCALL = 0x41
    SYSTEM_CRYPTO_CHECK_STANDARD_ACCOUNT = bytes((0x56, 0xE7, 0xB3, 0x27))

    if len(script) != 40:
        return False

    if script[0] != PUSHDATA1 or script[1] != 33 or script[35] != SYSCALL or script[36:40] != SYSTEM_CRYPTO_CHECK_STANDARD_ACCOUNT:
        return False
    return True


@pytest.fixture(scope=_SCOPE)
def neogo_config(neogo_deployment, adm_config, alphabet_wallets):
    neogo_deployment.dir.mkdir(mode=0o700, exist_ok=False)
    with open(neogo_deployment.template) as f:
        template = f.read()
    alphabet, alphabet_dir = alphabet_wallets
    adm, _ = adm_config
    credentials = adm["credentials"]

    seedlist = [f"{neogo_deployment.prefix}{index}:20333" for index in range(len(alphabet))]
    override = getattr(neogo_deployment, "override", {})
    fields = vars(neogo_deployment)
    configs = {}
    for index in range(len(alphabet)):
        letter = glagolic[index]
        fields.update(
            dict(
                letter=letter,
                index=index,
                password=credentials[letter],
            )
        )
        config = yaml.load(template.format(**fields), yaml.SafeLoader)
        config["ProtocolConfiguration"]["Hardforks"] = {}  # kludge: templating collision for {}
        config["ProtocolConfiguration"]["StandbyCommittee"] = alphabet
        config["ProtocolConfiguration"]["SeedList"] = seedlist[:index] + seedlist[index + 1 :]
        _update(config, override)
        with open(neogo_deployment.dir / f"{letter}.json", "w") as c:
            json.dump(config, c, ensure_ascii=False, indent=True, sort_keys=True)
        configs[letter] = config
    yield configs, neogo_deployment.dir
    shutil.rmtree(neogo_deployment.dir)


def _update(old: Mapping, new: Mapping) -> None:
    """Recursive version of dict.update."""
    for key in new:
        if key in old and isinstance(old[key], Mapping) and isinstance(new[key], Mapping):
            _update(old[key], new[key])
            continue
        old[key] = new[key]


@pytest.fixture(scope=_SCOPE)
def neogo(neogo_deployment, neogo_config, alphabet_deployment, frostfs_adm, _network):
    wallet_dir = alphabet_deployment.dir
    _, config_dir = neogo_config
    nodes = []
    for index in range(neogo_deployment.node_count):
        letter = glagolic[index]
        node = ContainerizedService(
            command=f"neo-go node --config-file /neogo/{letter}.json --privnet --debug",
            image=f"{neogo_deployment.image}:{neogo_deployment.version}",
            name=f"{neogo_deployment.prefix}{index+1}",
            network=_network,
        )
        node.add_file(wallet_dir / f"{letter}.json", f"/wallet/{letter}.json")
        node.add_file(config_dir / f"{letter}.json", f"/neogo/{letter}.json")
        node.start()
        nodes.append(node)

    def add_rpc_endpoint(command):
        for arg in shlex.split(command):
            # Check that there is at least one non-flag argument
            # (--version does not work with --rpc-endpoint)
            if not arg.startswith("-"):
                break
        else:
            return command
        return f"--rpc-endpoint 'http://{random.choice(nodes).name}:30333' {command}"

    frostfs_adm._default_cmd_rewrite = add_rpc_endpoint
    yield nodes
    for node in nodes:
        node.destroy()


@pytest.fixture(scope=_SCOPE)
def frostfs_adm(adm_deployment, adm_config, alphabet_deployment, _network):
    _, config_file = adm_config
    adm = ContainerizedService(
        command="sleep infinity",
        default_command=f'frostfs-adm --config "{config_file}" ' "{command}",
        image=f"{adm_deployment.image}:{adm_deployment.version}",
        name=f"{adm_deployment.prefix.strip('-')}",
        network=_network,
    )
    wallet_dir = alphabet_deployment.dir
    adm.add_directory(wallet_dir, wallet_dir)
    adm.add_file(config_file, config_file)
    yield adm
    adm.destroy()


@pytest.fixture(scope=_SCOPE)
def frostfs_bootstrap(frostfs_contract, frostfs_adm, neogo) -> Mapping[str, str]:
    output = {}

    def morph(command: str) -> str:
        output[command] = frostfs_adm(f"morph {command}")

    frostfs_adm.add_directory(frostfs_contract, frostfs_contract)
    morph(f"init --contracts '{frostfs_contract}'")
    morph(
        "ape add-rule-chain "
        "--target-type namespace "
        "--target-name '' "
        "--rule 'allow Container.* *' "
        "--chain-id 'allow_container_ops'"
    )
    morph("set-config ContainerFee=0")
    morph("set-config ContainerAliasFee=0")
    morph("set-config InnerRingCandidateFee=13")
    morph("set-config WithdrawFee=17")
    return output


@pytest.fixture(scope=_SCOPE)
def frostfs_contract(contract_deployment):
    if contract_deployment.dir.exists():
        return contract_deployment.dir
    contract_deployment.dir.mkdir(mode=0o700, exist_ok=False)
    with urlopen(
        contract_deployment.archive_url.format(
            version=contract_deployment.version,
        )
    ) as request:
        with tarfile.open(fileobj=request, mode="r|*") as tar:
            tar.extractall(path=contract_deployment.dir, filter=_tar_strip_components(1))
    return contract_deployment.dir


@pytest.fixture(scope=_SCOPE)
def frostfs_locode(locode_deployment):
    locode = locode_deployment.dir / "locode_db"
    if locode.exists():
        return locode
    locode_deployment.dir.mkdir(mode=0o700, exist_ok=False)
    with urlopen(
        locode_deployment.archive_url.format(
            version=locode_deployment.version,
        )
    ) as request:
        with gzip.GzipFile(fileobj=request, mode="rb") as archive:
            with open(locode, "wb") as destination:
                shutil.copyfileobj(archive, destination)
    return locode


@pytest.fixture(scope=_SCOPE)
def innerring_config(innerring_deployment, neogo, adm_config, alphabet_wallets):
    innerring_deployment.dir.mkdir(mode=0o700, exist_ok=False)
    with open(innerring_deployment.template) as f:
        template = f.read()
    alphabet, alphabet_dir = alphabet_wallets
    adm, _ = adm_config
    credentials = adm["credentials"]

    override = getattr(innerring_deployment, "override", {})
    fields = vars(innerring_deployment)
    configs = {}
    for index in range(len(alphabet)):
        letter = glagolic[index]
        fields.update(
            dict(
                letter=letter,
                index=index,
                password=credentials[letter],
                neogo=neogo[index].name,
            )
        )
        config = yaml.load(template.format(**fields), yaml.SafeLoader)
        config["morph"]["validators"] = alphabet
        _update(config, override)
        with open(innerring_deployment.dir / f"{letter}.json", "w") as c:
            json.dump(config, c, ensure_ascii=False, indent=True, sort_keys=True)
        configs[letter] = config
    yield configs, innerring_deployment.dir
    shutil.rmtree(innerring_deployment.dir)


@pytest.fixture(scope=_SCOPE)
def innerring(innerring_deployment, innerring_config, frostfs_locode, frostfs_bootstrap, alphabet_deployment, _network):
    wallet_dir = alphabet_deployment.dir
    _, config_dir = innerring_config
    nodes = []
    for index in range(alphabet_deployment.node_count):
        letter = glagolic[index]
        node = ContainerizedService(
            command=f"frostfs-ir --config /innerring/{letter}.json",
            image=f"{innerring_deployment.image}:{innerring_deployment.version}",
            name=f"{innerring_deployment.prefix}{index+1}",
            network=_network,
        )
        node.add_file(wallet_dir / f"{letter}.json", f"/wallet/{letter}.json")
        node.add_file(config_dir / f"{letter}.json", f"/innerring/{letter}.json")
        node.add_file(frostfs_locode, f"/innerring/locode.db")
        node.start()
        nodes.append(node)
    yield nodes
    for node in nodes:
        node.destroy()


@pytest.fixture(scope=_SCOPE)
def storage_config(storage_deployment, neogo, frostfs_adm, innerring):
    storage_deployment.dir.mkdir(mode=0o700, exist_ok=False)
    with open(storage_deployment.template) as f:
        template = f.read()
    sidechain = []
    for node in neogo:
        sidechain.append(
            dict(
                address=f"ws://{node.name}:30333/ws",
                priority=0,
            )
        )
    override = getattr(storage_deployment, "override", {})
    fields = vars(storage_deployment)
    configs = []
    for index in range(storage_deployment.node_count):
        wallet = storage_deployment.dir / f"wallet-{index}.json"
        _, password = _new_wallet(wallet)
        fields.update(
            dict(
                index=index,
                prefix=storage_deployment.prefix,
                wallet=str(wallet),
                password=password,
                price=42,
            )
        )
        config = yaml.load(template.format(**fields), yaml.SafeLoader)
        config["morph"]["rpc_endpoint"] = sidechain
        _update(config, override)
        with open(storage_deployment.dir / f"config-{index}.json", "w") as c:
            json.dump(config, c, ensure_ascii=False, indent=True, sort_keys=True)
        frostfs_adm.add_file(wallet, wallet)
        frostfs_adm(f"morph refill-gas --storage-wallet '{wallet}' --gas 50.0")
        configs.append(config)
    yield configs, storage_deployment.dir
    shutil.rmtree(storage_deployment.dir)


@pytest.fixture(scope=_SCOPE)
def storage(storage_deployment, storage_config, frostfs_adm, _network):
    nodes = []
    configs, _ = storage_config
    for index, config in enumerate(configs):
        node = ContainerizedService(
            command=f"frostfs-node --config /storage/config.json",
            image=f"{storage_deployment.image}:{storage_deployment.version}",
            name=f"{storage_deployment.prefix}{index+1}",
            network=_network,
        )
        node.add_file(config["node"]["wallet"]["path"], config["node"]["wallet"]["path"])
        node.add_file(storage_deployment.dir / f"config-{index}.json", f"/storage/config.json")
        node.start()
        nodes.append(node)
    for index, node in enumerate(nodes):
        # Adding storage node account to proxy contract is required to be able to use apemanager:
        # https://chat.yadro.com/yadro/pl/eet5jxiuabn1i8omg6jz4yeeso
        address = _wallet_address(configs[index]["node"]["wallet"]["path"])
        frostfs_adm(f"morph proxy-add-account --account {address}")
    frostfs_adm("morph force-new-epoch")
    yield nodes
    for node in nodes:
        node.destroy()


@pytest.fixture(scope=_SCOPE)
def httpgw_config(httpgw_deployment, storage, neogo):
    httpgw_deployment.dir.mkdir(mode=0o700, exist_ok=False)
    with open(httpgw_deployment.template) as f:
        template = f.read()
    peers = {}
    for index, node in enumerate(storage):
        peers[index] = dict(
            address=f"grpc://{node.name}:8802",
            priority=1,
            weight=1,
        )
    override = getattr(httpgw_deployment, "override", {})
    fields = vars(httpgw_deployment)
    configs = []
    for index in range(httpgw_deployment.node_count):
        wallet = httpgw_deployment.dir / f"wallet-{index}.json"
        _, password = _new_wallet(wallet)
        fields.update(
            dict(
                wallet=str(wallet),
                password=password,
                morph=neogo[index % len(neogo)].name,
            )
        )
        config = yaml.load(template.format(**fields), yaml.SafeLoader)
        config["peers"] = peers
        _update(config, override)
        with open(httpgw_deployment.dir / f"config-{index}.json", "w") as c:
            json.dump(config, c, ensure_ascii=False, indent=True, sort_keys=True)
        configs.append(config)
    yield configs, httpgw_deployment.dir
    shutil.rmtree(httpgw_deployment.dir)


@pytest.fixture(scope=_SCOPE)
def httpgw(httpgw_deployment, httpgw_config, _network):
    nodes = []
    configs, _ = httpgw_config
    for index, config in enumerate(configs):
        node = ContainerizedService(
            command=f"frostfs-http-gw --config /httpgw/config.json",
            image=f"{httpgw_deployment.image}:{httpgw_deployment.version}",
            name=f"{httpgw_deployment.prefix}{index+1}",
            network=_network,
        )
        node.add_file(config["wallet"]["path"], config["wallet"]["path"])
        node.add_file(httpgw_deployment.dir / f"config-{index}.json", f"/httpgw/config.json")
        node.start()
        nodes.append(node)
    ready = re.compile(r"starting server.*\:80")
    for node in nodes:
        node.wait(ready, timeout=10)
    yield nodes
    for node in nodes:
        node.destroy()


def _new_wallet(path: Path, password: str = None) -> (Wallet, str):
    """
    Create new wallet and new account.
    """
    wallet = Wallet()
    if password is None:
        password = "".join(random.choice(string.ascii_letters) for _ in range(12))
    account = Account.create_new(password)
    wallet.account_add(account)
    with open(path, "w") as out:
        json.dump(wallet.to_json(), out)
    return wallet, password


def _tar_strip_components(number=1):
    """
    See --strip-components in `man tar`.
    """
    sep = "/"

    def _filter(member: tarfile.TarInfo, path: str) -> tarfile.TarInfo | None:
        components = member.name.split(sep)
        for _ in range(number):
            if not components:
                break
            components.pop(0)
        if not components:
            return None
        member = member.replace(name=sep.join(components))
        return tarfile.data_filter(member, path)

    return _filter