"""
Offline tests for the headless ``bal.cli.controller.BalController``.

These run without a wallet, a network or Qt: the controller is exercised
against a ``FakeWallet`` plus a real ``bal.cli.plugin.Plugin`` backed by an
isolated in-memory ``SimpleConfig``.  Only the flows that never touch the
network (settings/heirs/willexecutors CRUD, status snapshots, error mapping)
are covered here; build/sign/push flows need a live wallet and network and are
exercised by the group tests instead.

Run:
    source electrum/env/bin/activate
    python3 tests/test_cli_controller_offline.py
"""

import os
import shutil
import sys
import tempfile
import time
import unittest.mock as mock

sys.path.insert(0, os.path.join(os.path.dirname(__file__), os.pardir))

from electrum.simple_config import SimpleConfig
from electrum.util import UserFacingException

from bal.cli.controller import BalController, _user_facing
from bal.core.heirs import Heirs
from bal.core.util import Util
from bal.core.will import (
    HeirChangeException,
    NotCompleteWillException,
    WillexecutorChangeException,
)

VALID_ADDRESS = "bc1qusymuetsz2psaqzqxv8qmzcy64d9meckj3lxxf"


class FakeDB:
    def __init__(self):
        self._data = {}

    def get(self, key, default=None):
        return self._data.get(key, default)

    def put(self, key, value):
        self._data[key] = value

    def get_dict(self, key):
        return self._data.setdefault(key, {})

    def get_transaction(self, txid):
        return None

    def add_transaction(self, tx, *args, **kwargs):
        pass


class FakeWallet:
    def __init__(self):
        self.db = FakeDB()
        self.network = None
        self.adb = None
        self._dust = 500

    def save_db(self):
        pass

    def dust_threshold(self):
        return self._dust

    def has_keystore_encryption(self):
        return False

    def set_label(self, txid, text):
        pass

    def get_utxos(self):
        return []

    def get_change_addresses_for_new_transaction(self, *args, **kwargs):
        return [VALID_ADDRESS]


class Plugin:
    """Real ``bal.cli.plugin.Plugin`` with an isolated config directory."""

    def __init__(self):
        self.tmpdir = tempfile.mkdtemp(prefix="bal_cli_test_")
        from bal.cli.plugin import Plugin as RealPlugin

        self.config = SimpleConfig(
            {"electrum_path": self.tmpdir},
            read_user_config_function=lambda path: {},
        )
        self.plugin = RealPlugin(None, self.config, "bal")

    def __enter__(self):
        return self.plugin

    def __exit__(self, *exc):
        shutil.rmtree(self.tmpdir, ignore_errors=True)


def _make_controller(plugin):
    return BalController(plugin, FakeWallet())


def _tmp_path():
    """Return the path of a fresh temporary JSON file (caller removes it)."""
    fd, path = tempfile.mkstemp(prefix="bal_cli_", suffix=".json")
    os.close(fd)
    return path


def test_controller_init_empty():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        assert c.willitems == {}
        assert c.will == {}
        assert c.heirs == {}
        assert isinstance(c.will_settings, dict)
        assert "baltx_fees" in c.will_settings
        # Fresh config: no stored will-executors.  On mainnet the default
        # WILLEXECUTORS table is keyed by "mainnet" while chainname is
        # "bitcoin", so nothing is injected either.
        assert c.willexecutors == {}
        assert c.no_willexecutor is False


def test_settings_roundtrip():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        listing = c.settings_list()
        assert "BAL_TX_FEES" in listing or "TX_FEES" in listing
        tx_key = "BAL_TX_FEES" if "BAL_TX_FEES" in listing else "TX_FEES"
        assert c.settings_get(tx_key)["value"] == 100

        c.settings_set("bal_tx_fees", "150")
        assert c.settings_get("bal_tx_fees")["value"] == 150
        assert c.settings_get("TX_FEES")["value"] == 150

        c.settings_set("bal_no_willexecutor", "true")
        assert c.settings_get("bal_no_willexecutor")["value"] is True

        c.settings_reset("bal_tx_fees")
        assert c.settings_get("bal_tx_fees")["value"] == 100


def test_settings_unknown_key():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        try:
            c.settings_get("bal_does_not_exist")
            raise AssertionError("expected UserFacingException")
        except UserFacingException as e:
            assert "Unknown BAL setting" in str(e)


def test_heirs_crud():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        c.heirs_add("alice", VALID_ADDRESS, "100000")
        assert c.heirs["alice"][0] == VALID_ADDRESS
        assert c.heirs["alice"][1] == "100000"

        c.heirs_update("alice", amount="200000")
        assert c.heirs["alice"][1] == "200000"
        assert c.heirs_show("alice")["value"][1] == "200000"

        assert "alice" in c.heirs_list()
        c.heirs_delete(["alice"])
        assert "alice" not in c.heirs_list()


def test_heirs_add_op_return():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        c.heirs_add("note", "OP_RETURN:6a0242414c", "100000")
        assert c.heirs["note"][1] == "0"


def test_willexecutors_crud():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        assert c.willexecutors == {}

        new_url = "https://executor.example.invalid"
        c.willexecutors_add(new_url, address="", base_fee=250)
        assert c.willexecutors_show(new_url)["willexecutor"]["base_fee"] == 250
        assert c.willexecutors_show(new_url)["willexecutor"]["selected"] is False

        c.willexecutors_update(new_url, base_fee="300", info="Example executor")
        assert c.willexecutors_show(new_url)["willexecutor"]["base_fee"] == 300

        c.willexecutors_select([new_url], select=True)
        assert c.willexecutors_show(new_url)["willexecutor"]["selected"] is True

        renamed = "https://executor2.example.invalid"
        c.willexecutors_update(new_url, rename_to=renamed)
        assert renamed in c.willexecutors
        assert new_url not in c.willexecutors

        assert c.willexecutors_delete([renamed]) == {"deleted": [renamed]}
        assert renamed not in c.willexecutors


def test_willexecutors_update_accepts_promo_code():
    """Regression: the command transport used to forward six positional args to
    a five-parameter controller method, raising TypeError.  ``promo_code`` must
    also be applied to the record instead of being silently dropped.
    """
    with Plugin() as plugin:
        c = _make_controller(plugin)
        url = "https://executor-promo.example.invalid"
        c.willexecutors_add(url, address="", base_fee=250)
        # Positional call mirroring the transport layer: (url, address,
        # base_fee, info, promo_code, rename_to).
        result = c.willexecutors_update(
            url, "", "300", "Promo executor", "PROMO10", None
        )
        assert result["willexecutor"]["base_fee"] == 300
        assert result["willexecutor"]["info"] == "Promo executor"
        assert c.willexecutors[url]["promo_code"] == "PROMO10"


def test_heirs_locktime_forced_when_multiverse_disabled():
    """When multiverse is disabled the heir locktime follows the will locktime,
    exactly like the GUI's ``set_heir`` (which forces ``heir[3]``)."""
    with Plugin() as plugin:
        plugin.WILL_SETTINGS.set(
            {"threshold": "-150d", "locktime": "2y", "baltx_fees": 20}
        )
        plugin.ENABLE_MULTIVERSE.set(False)
        c = _make_controller(plugin)
        c.heirs_add("bob", VALID_ADDRESS, "100000", locktime="30d")
        assert c.heirs["bob"][2] == "2y"


def test_heirs_locktime_kept_when_multiverse_enabled():
    with Plugin() as plugin:
        plugin.WILL_SETTINGS.set({"threshold": "-150d", "locktime": "2y", "baltx_fees": 20})
        plugin.ENABLE_MULTIVERSE.set(True)
        c = _make_controller(plugin)
        c.heirs_add("carol", VALID_ADDRESS, "100000", locktime="30d")
        assert c.heirs["carol"][2] == "30d"


def test_user_facing_maps_not_complete_will():
    """The check flow must translate every NotCompleteWillException subtype to a
    user-facing message instead of leaking the raw internal exception.
    """
    assert "heirs changed" in str(_user_facing(HeirChangeException())).lower()
    assert "will-executor changed" in str(
        _user_facing(WillexecutorChangeException())
    ).lower()
    assert "no valid transaction" in str(
        _user_facing(NotCompleteWillException())
    ).lower()
    assert "does not cover" in str(
        _user_facing(NotCompleteWillException("utxo"))
    ).lower()

def test_willexecutors_delete_missing_is_noop():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        assert c.willexecutors_delete(["https://missing.example.invalid"]) == {
            "deleted": []
        }


def test_willexecutors_select_only_valid():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        valid_url = "https://valid.example.invalid"
        invalid_url = "https://invalid.example.invalid"
        # Valid: real address, base_fee within [dust, max_fee].
        c.willexecutors_add(valid_url, address=VALID_ADDRESS, base_fee=1000)
        # Invalid: no address.
        c.willexecutors_add(invalid_url, address="", base_fee=1000)

        c.willexecutors_select(None, select=True, only_valid=True)
        assert c.willexecutors[valid_url]["selected"] is True
        assert c.willexecutors[invalid_url]["selected"] is False

        # Select everything, then deselect only-valid: the valid one keeps its
        # state, only the invalid one is cleared.
        c.willexecutors_select(None, select=True)
        c.willexecutors_select(None, select=False, only_valid=True)
        assert c.willexecutors[valid_url]["selected"] is True
        assert c.willexecutors[invalid_url]["selected"] is False


def test_willexecutors_import_overwrites_existing():
    import json

    with Plugin() as plugin:
        c = _make_controller(plugin)
        url = "https://existing.example.invalid"
        c.willexecutors_add(url, address="", base_fee=100, info="Old")
        path = _tmp_path()
        try:
            with open(path, "w", encoding="utf-8") as f:
                json.dump(
                    {
                        url: {
                            "address": "",
                            "base_fee": 999,
                            "info": "New",
                            "selected": True,
                        }
                    },
                    f,
                )
            result = c.willexecutors_import(path)
            assert result["imported"] == 1
            # The imported record replaces the existing one (GUI behaviour).
            assert c.willexecutors[url]["base_fee"] == 999
            assert c.willexecutors[url]["info"] == "New"
            assert c.willexecutors[url]["selected"] is True
        finally:
            os.remove(path)


def test_willexecutors_export_subsets():
    import json

    with Plugin() as plugin:
        c = _make_controller(plugin)
        selected_url = "https://selected.example.invalid"
        other_url = "https://other.example.invalid"
        invalid_url = "https://invalid.example.invalid"
        c.willexecutors_add(selected_url, address=VALID_ADDRESS, base_fee=1000)
        c.willexecutors_add(other_url, address=VALID_ADDRESS, base_fee=1000)
        c.willexecutors_add(invalid_url, address="", base_fee=1000)
        c.willexecutors_select([selected_url], select=True)

        def exported(subset):
            path = _tmp_path()
            try:
                c.willexecutors_export(path, subset)
                with open(path, encoding="utf-8") as f:
                    return json.load(f)
            finally:
                os.remove(path)

        assert set(exported(None)) == {selected_url, other_url, invalid_url}
        assert set(exported("selected")) == {selected_url}
        # "valid" keeps both real-address records and drops the address-less one.
        assert set(exported("valid")) == {selected_url, other_url}


def test_user_facing_maps_no_servers_for_chain():
    from bal.core.willexecutors import Willexecutors

    advanced = Willexecutors.NoServersForChainError(
        "bitcoin", url="https://welist.example/", reason="boom"
    )
    assert "https://welist.example/" in str(_user_facing(advanced))
    basic = Willexecutors.NoServersForChainError("bitcoin")
    assert "bitcoin" in str(_user_facing(basic))


def test_prepare_will_warns_on_amount_exception():
    from bal.core import will as will_mod

    with Plugin() as plugin:
        plugin.NO_WILLEXECUTOR.set(True)
        c = _make_controller(plugin)
        c.heirs["alice"] = [VALID_ADDRESS, "100%", "2y"]
        with mock.patch.object(
            will_mod.Will,
            "check_amounts",
            side_effect=will_mod.FixedAmountException("too much"),
        ), mock.patch.object(will_mod.Will, "is_will_valid", return_value=True):
            result = c.prepare_will()
        # The amount mismatch is a warning, not an abort: the flow completes.
        assert result["result"] == "coherent"


def test_will_status_empty():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        status = c.will_status()
        assert status["count"] == 0
        assert status["items"] == []


def test_will_check_no_heirs_raises():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        try:
            c.will_check()
            raise AssertionError("expected UserFacingException")
        except UserFacingException as e:
            assert "heir" in str(e).lower()


def test_auto_rebuild_no_heirs():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        assert c.auto_rebuild() == {"result": "no_heirs"}


def test_auto_rebuild_threshold_passed_invalidates():
    with Plugin() as plugin:
        c = _make_controller(plugin)
        c.heirs_add("alice", VALID_ADDRESS, "100000")
        plugin.USER_TYPE.set("advanced")
        c.will_settings["threshold"] = int(time.time()) - 3600
        result = c.auto_rebuild()
        assert result["result"] == "invalidated"
        assert result["reason"] == "threshold_passed"
        assert result["invalidation_tx"] == {"txid": None, "tx": None}


def test_build_will_reanchors_date_to_check_to_new_locktime():
    """CLI mirror of the GUI regression: ``build_will`` must re-anchor
    ``date_to_check`` to the CURRENT heirs' earliest delivery before building,
    so an anticipated (shortened) rebuild is not blocked by the old built-will
    anchor (which would yield NO_FUTURE_DATE in ``get_transactions``).
    """
    with Plugin() as plugin:
        plugin.USER_TYPE.set("advanced")
        plugin.NO_WILLEXECUTOR.set(True)
        plugin.ENABLE_MULTIVERSE.set(True)
        plugin.WILL_SETTINGS.set({"threshold": "-150d", "locktime": "2y", "baltx_fees": 20})
        c = _make_controller(plugin)
        c.no_willexecutor = True
        c.heirs["alice"] = [VALID_ADDRESS, "100%", "1y"]

        # Simulate an old built will frozen at 2y: reload keeps its (stale)
        # anchor, which would reject the anticipated "1y" delivery.
        c.init_class_variables()
        stale_anchor = Util.parse_locktime_string("2y") - 150 * 86400
        c.date_to_check = stale_anchor
        assert Util.parse_locktime_string("1y") < c.date_to_check

        with mock.patch.object(Heirs, "get_transactions", return_value={}) as gt:
            result = c.build_will()

        assert result == {}
        # build_will re-anchored date_to_check to the new 1y delivery...
        expected = Util.parse_locktime_string("1y") - 150 * 86400
        assert abs(c.date_to_check - expected) < 3600
        # ...and used THAT anchor as the build filter, not the stale 2y one.
        assert gt.call_args.args[-1] == c.date_to_check


# ------------------------------------------------------------------ #
# runner
# ------------------------------------------------------------------ #

def main():
    failures = 0
    for name, fn in sorted(globals().items()):
        if not name.startswith("test_") or not callable(fn):
            continue
        print(f"  {name}")
        try:
            fn()
        except Exception as e:
            failures += 1
            print(f"  [FAIL] {name}: {e!r}")
    if failures:
        print(f"[FAIL] {failures} test(s) failed")
        sys.exit(1)
    print("[OK] All offline controller tests passed")


if __name__ == "__main__":
    main()