"""verify_slot_reconcile tests (REQ-106, BAT-051, dcy-034).

TDD coverage:
- AC-1: C-case warned + ledger matches broker → cleared
- AC-2: C-case warned + ledger != broker → rejected + reason
- AC-3: slot qty is NOT changed (read-centric invariant)
- AC-4: slot with no warning → not_warned (idempotent, exit 0)
- AC-5: --json output format (tested in CLI layer)
- AC-6: no --portfolio-id → all C-warned slots (CLI layer)
- OQ-C: B-warned slot → not_c_case + 0 exit (test function result.result)
- ReconcileWarningStore.get_warning_info: returns correct dict
"""
from __future__ import annotations

from uuid import uuid4

import pytest

from trex_core.application.broker_port import BalanceItem
from trex_core.application.portfolio import (
    InMemoryReconcileWarningStore,
    PortfolioItem,
    SnapshotStore,
)
from trex_core.application.reconciliation import verify_slot_reconcile
from trex_core.domain.slot import SlotState
from trex_core.domain.slot.in_memory_repository import InMemorySlotRepository
from trex_core.domain.slot.models import Slot


INSTANCE = "test-instance"


def _make_slot(status: SlotState = SlotState.HOLDING, qty: float = 10.0,
               symbol: str = "005930", pid: str = "pf-005930") -> Slot:
    return Slot(
        slot_id=uuid4(),
        status=status,
        symbol=symbol,
        qty=qty,
        portfolio_id=pid,
        instance_key=INSTANCE,
    )


class FakeBroker:
    def __init__(self, balances: dict[str, int]):
        self._b = balances
    def name(self): return "fake"
    def submit_order(self, req): ...
    def poll_fill(self, *args, **kw): ...
    def cancel_order(self, *args, **kw): ...
    def get_current_price(self, sym): return None
    def get_balance(self) -> list[BalanceItem]:
        return [BalanceItem(symbol=sym, hldg_qty=qty)
                for sym, qty in self._b.items() if qty > 0]


def _setup_snapshot(portfolio_id: str, asset_qty: int, symbol: str = "005930") -> SnapshotStore:
    store = SnapshotStore()
    store.swap([PortfolioItem(
        portfolio_id=portfolio_id,
        symbol=symbol,
        cash_balance=0.0,
        asset_quantity=float(asset_qty),
    )])
    return store


def _run_verify(slot: Slot, hub_qty: int, broker_qty: int,
                case_code: str = "C", warn_store=None) -> dict:
    repo = InMemorySlotRepository()
    repo.add_slot(slot)
    pid = slot.portfolio_id or "pf-005930"
    ws = warn_store if warn_store is not None else InMemoryReconcileWarningStore()
    ws.set_warned(str(slot.slot_id), portfolio_id=pid, case_code=case_code)
    store = _setup_snapshot(pid, hub_qty, symbol=slot.symbol or "005930")
    broker = FakeBroker({slot.symbol or "005930": broker_qty})

    result = verify_slot_reconcile(
        portfolio_id=pid,
        store=store,
        broker=broker,
        slot_repo=repo,
        instance_key=INSTANCE,
        warn_store=ws,
    )
    return result, repo, ws


# ---------------------------------------------------------------------------
# AC-1: C-case warned, ledger matches broker → cleared
# ---------------------------------------------------------------------------

def test_verify_c_case_match_clears_warning():
    """AC-1: hub_qty == broker_qty → 'cleared', warning removed."""
    slot = _make_slot(qty=10.0)
    result, repo, ws = _run_verify(slot, hub_qty=10, broker_qty=10, case_code="C")

    assert result["result"] == "cleared"
    assert not ws.is_warned(str(slot.slot_id))
    assert result["hub_qty"] == 10
    assert result["broker_qty"] == 10
    assert result["reason"] is None


# ---------------------------------------------------------------------------
# AC-2: C-case warned, ledger != broker → rejected + reason (no forced clear)
# ---------------------------------------------------------------------------

def test_verify_c_case_mismatch_rejected():
    """AC-2: hub_qty != broker_qty → 'rejected', warning NOT cleared, reason shown."""
    slot = _make_slot(qty=10.0)
    result, repo, ws = _run_verify(slot, hub_qty=5, broker_qty=10, case_code="C")

    assert result["result"] == "rejected"
    assert ws.is_warned(str(slot.slot_id))  # still warned
    assert result["hub_qty"] == 5
    assert result["broker_qty"] == 10
    assert result["reason"] is not None
    assert "hub_qty" in result["reason"] or "5" in result["reason"]


# ---------------------------------------------------------------------------
# AC-3: slot qty is NOT changed (read-centric invariant)
# ---------------------------------------------------------------------------

def test_verify_does_not_change_slot_qty_on_clear():
    """AC-3: verify does not modify slot qty when clearing (read-centric)."""
    slot = _make_slot(qty=10.0)
    result, repo, _ = _run_verify(slot, hub_qty=10, broker_qty=10, case_code="C")

    refreshed = repo.fetch_slot(slot.slot_id)
    assert refreshed.qty == 10.0  # unchanged
    assert result["result"] == "cleared"


def test_verify_does_not_change_slot_qty_on_reject():
    """AC-3: verify does not modify slot qty when rejecting."""
    slot = _make_slot(qty=10.0)
    result, repo, _ = _run_verify(slot, hub_qty=5, broker_qty=10, case_code="C")

    refreshed = repo.fetch_slot(slot.slot_id)
    assert refreshed.qty == 10.0  # unchanged
    assert result["result"] == "rejected"


# ---------------------------------------------------------------------------
# AC-4: no warning → not_warned (idempotent, exit 0)
# ---------------------------------------------------------------------------

def test_verify_not_warned_returns_not_warned():
    """AC-4: slot with no active reconcile-warning → 'not_warned' (idempotent)."""
    slot = _make_slot(qty=10.0)
    repo = InMemorySlotRepository()
    repo.add_slot(slot)
    ws = InMemoryReconcileWarningStore()  # no warning set
    store = _setup_snapshot("pf-005930", 10)
    broker = FakeBroker({"005930": 10})

    result = verify_slot_reconcile(
        portfolio_id="pf-005930",
        store=store,
        broker=broker,
        slot_repo=repo,
        instance_key=INSTANCE,
        warn_store=ws,
    )
    assert result["result"] == "not_warned"
    assert result["slot_id"] == str(slot.slot_id)


# ---------------------------------------------------------------------------
# OQ-C: B-warned slot → not_c_case, 0 exit
# ---------------------------------------------------------------------------

def test_verify_b_warned_slot_returns_not_c_case():
    """OQ-C: verify on B-warned slot returns 'not_c_case' (use sync for B)."""
    slot = _make_slot(qty=10.0)
    result, _, ws = _run_verify(slot, hub_qty=10, broker_qty=10, case_code="B")

    assert result["result"] == "not_c_case"
    # warning still present (not_c_case does not clear)
    assert ws.is_warned(str(slot.slot_id))
    # reason explains the situation
    assert "sync" in result["reason"].lower() or "B" in result["reason"]


# ---------------------------------------------------------------------------
# slot_not_found
# ---------------------------------------------------------------------------

def test_verify_slot_not_found():
    """No slot for portfolio_id → 'slot_not_found'."""
    repo = InMemorySlotRepository()
    ws = InMemoryReconcileWarningStore()
    store = _setup_snapshot("pf-999", 10)
    broker = FakeBroker({"005930": 10})

    result = verify_slot_reconcile(
        portfolio_id="pf-999",
        store=store,
        broker=broker,
        slot_repo=repo,
        instance_key=INSTANCE,
        warn_store=ws,
    )
    assert result["result"] == "slot_not_found"
    assert result["slot_id"] is None


# ---------------------------------------------------------------------------
# ReconcileWarningStore.get_warning_info (InMemory)
# ---------------------------------------------------------------------------

def test_get_warning_info_returns_dict():
    """get_warning_info returns dict with case_code/portfolio_id/actor/reason."""
    ws = InMemoryReconcileWarningStore()
    ws.set_warned("slot-1", portfolio_id="pf-001", case_code="C",
                  actor="reconcile", reason="hub_qty=5 broker_qty=10")
    info = ws.get_warning_info("slot-1")
    assert info is not None
    assert info["case_code"] == "C"
    assert info["portfolio_id"] == "pf-001"
    assert info["actor"] == "reconcile"
    assert "hub_qty" in info["reason"]


def test_get_warning_info_returns_none_for_missing():
    """get_warning_info returns None for unknown slot_id."""
    ws = InMemoryReconcileWarningStore()
    assert ws.get_warning_info("nonexistent") is None


def test_get_warning_info_after_clear_returns_none():
    """get_warning_info returns None after clear_warned."""
    ws = InMemoryReconcileWarningStore()
    ws.set_warned("s1", portfolio_id="p1", case_code="B")
    ws.clear_warned("s1")
    assert ws.get_warning_info("s1") is None


# ---------------------------------------------------------------------------
# verify with mismatch between snapshot and broker (empty snapshot)
# ---------------------------------------------------------------------------

def test_verify_empty_snapshot_treats_hub_qty_as_zero():
    """When snapshot has no entry for portfolio_id, hub_qty defaults to 0.
    If broker has holdings, this will be a mismatch → rejected."""
    slot = _make_slot(qty=10.0)
    repo = InMemorySlotRepository()
    repo.add_slot(slot)
    ws = InMemoryReconcileWarningStore()
    ws.set_warned(str(slot.slot_id), portfolio_id="pf-005930", case_code="C")
    store = SnapshotStore()  # empty — no swap
    broker = FakeBroker({"005930": 10})

    result = verify_slot_reconcile(
        portfolio_id="pf-005930",
        store=store,
        broker=broker,
        slot_repo=repo,
        instance_key=INSTANCE,
        warn_store=ws,
    )
    # hub_qty=0, broker_qty=10 → mismatch → rejected
    assert result["result"] == "rejected"
    assert result["hub_qty"] == 0
    assert result["broker_qty"] == 10