# DRAFT — Test-Entwurf für SNAPSHOT-EMIT-COMPLETENESS
# Status: planned, NICHT ausgeführt während Nightly-Safe-Mode.
# Zielort beim späteren Merge: trading/tests/test_snapshot_emit_completeness.py
#
# Read-only-Entwurf nach Vorlage docs/PLAN_SNAPSHOT_EMIT_COMPLETENESS.md
# Section 5. Diese Datei liegt bewusst unter reports/nightly/ und ist
# nicht in tests/ registriert — kein Test-Runner würde sie picken.

"""
Tests for SNAPSHOT-EMIT-COMPLETENESS:
verify that per-scan emit_position_snapshot in trading/main.py:448
threads identifier and lifecycle fields from the _pos dict into the
snapshot.

These tests are AST + monkeypatch only — they do not require a running
bot, exchange, or database.
"""

import ast
import os
import unittest
from pathlib import Path
from unittest.mock import patch, MagicMock

REPO_ROOT = Path(__file__).resolve().parents[3]
MAIN_PY = REPO_ROOT / "trading" / "main.py"


class TestSnapshotEmitCompletenessAST(unittest.TestCase):
    """AST-level guarantees about the per-scan emit call."""

    @classmethod
    def setUpClass(cls):
        cls.tree = ast.parse(MAIN_PY.read_text())

    def _find_emit_calls(self):
        """Yield every Call node whose .func is `emit_position_snapshot`."""
        for node in ast.walk(self.tree):
            if (
                isinstance(node, ast.Call)
                and isinstance(node.func, ast.Name)
                and node.func.id == "emit_position_snapshot"
            ):
                yield node

    def test_at_least_two_emit_call_sites(self):
        """one BUY-side emit and one per-scan emit must remain."""
        calls = list(self._find_emit_calls())
        # We expect ≥2; brittle counter-regression on excess merges.
        self.assertGreaterEqual(len(calls), 2)

    def test_per_scan_emit_carries_decision_id(self):
        """
        At least one emit_position_snapshot call must pass `decision_id`
        as a keyword argument sourced from the position dict.
        """
        kw_names = []
        for call in self._find_emit_calls():
            kw_names.append({kw.arg for kw in call.keywords})
        self.assertTrue(
            any("decision_id" in s for s in kw_names),
            f"no emit_position_snapshot call carries decision_id: {kw_names}",
        )

    def test_per_scan_emit_carries_opened_at(self):
        kw_names = []
        for call in self._find_emit_calls():
            kw_names.append({kw.arg for kw in call.keywords})
        self.assertTrue(
            any("opened_at" in s for s in kw_names),
            f"no emit_position_snapshot call carries opened_at: {kw_names}",
        )

    def test_per_scan_emit_carries_metadata(self):
        kw_names = []
        for call in self._find_emit_calls():
            kw_names.append({kw.arg for kw in call.keywords})
        self.assertTrue(
            any(("metadata" in s) or ("metadata_json" in s) for s in kw_names),
            f"no emit_position_snapshot call carries metadata: {kw_names}",
        )


class TestSnapshotEmitRuntimePropagation(unittest.TestCase):
    """
    Monkeypatch emit_position_snapshot and exercise the per-scan loop
    over a minimal live_trader.state['positions']. Verifies the
    identifier fields are threaded.
    """

    def test_identifiers_threaded_from_pos_dict(self):
        from trading import main as bot_main  # imported lazily

        captured = []

        def _spy(**kw):
            captured.append(kw)

        # NB: this test is illustrative; the call site in main.py:448
        # lives inside run_scan_cycle. A real fixture would set up
        # bot_main.live_trader with a stub state and call the loop.
        # The skeleton below shows the expected assertion shape.
        with patch.object(bot_main, "emit_position_snapshot", side_effect=_spy):
            # … run the relevant section of run_scan_cycle here …
            pass

        # Hypothetical: one of the emits should carry these keys.
        # Real implementation completes the fixture above.
        for c in captured:
            for k in ("decision_id", "opened_at", "strategy_id", "metadata"):
                self.assertIn(k, c, f"missing {k} in emit kwargs: {c}")

    def test_metadata_excludes_none_padding(self):
        """metadata block must not include None values for absent _pos keys."""
        # placeholder — populated when fixture is in place
        pass

    def test_risk_reward_fallback(self):
        """if _pos has SL/TP/entry but no risk_reward, fallback = (tp-entry)/(entry-sl)."""
        # placeholder
        pass

    def test_no_crash_on_sparse_pos(self):
        """legacy _pos without identifier keys must not raise."""
        # placeholder
        pass


if __name__ == "__main__":
    unittest.main()