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refactor(pre-alpha): fail closed on historical preview fallbacks

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This commit is contained in:
Bu5hm4nn
2026-03-26 11:55:45 +01:00
parent 4eec0127da
commit f38d0a53a9
6 changed files with 85 additions and 47 deletions
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26
app/pages/backtests.py
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@@ -289,9 +289,9 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
row_key="date",
).classes("w-full")
def validate_current_scenario() -> str | None:
def validate_current_scenario(*, entry_spot: float | None = None) -> str | None:
try:
service.run_read_only_scenario(
service.validate_preview_inputs(
symbol=str(symbol_input.value or ""),
start_date=parse_iso_date(start_input.value, "Start date"),
end_date=parse_iso_date(end_input.value, "End date"),
@@ -299,6 +299,7 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
underlying_units=float(units_input.value or 0.0),
loan_amount=float(loan_input.value or 0.0),
margin_call_ltv=float(ltv_input.value or 0.0),
entry_spot=entry_spot,
)
except (ValueError, KeyError) as exc:
return str(exc)
@@ -320,12 +321,7 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
def refresh_workspace_seeded_units() -> None:
validation_label.set_text("")
entry_spot, entry_error = derive_entry_spot()
if (
workspace_id
and config is not None
and config.gold_value is not None
and entry_spot is not None
):
if workspace_id and config is not None and config.gold_value is not None and entry_spot is not None:
units_input.value = asset_quantity_from_workspace_config(config, entry_spot=entry_spot, symbol="GLD")
entry_spot_hint.set_text(f"Auto-derived entry spot: ${entry_spot:,.2f}")
else:
@@ -335,7 +331,7 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
validation_label.set_text(entry_error)
render_result_state("Scenario validation failed", entry_error, tone="warning")
return
validation_error = validate_current_scenario()
validation_error = validate_current_scenario(entry_spot=entry_spot)
if validation_error:
validation_label.set_text(validation_error)
render_result_state("Scenario validation failed", validation_error, tone="warning")
@@ -351,7 +347,7 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
validation_label.set_text(entry_error)
render_result_state("Scenario validation failed", entry_error, tone="warning")
return
validation_error = validate_current_scenario()
validation_error = validate_current_scenario(entry_spot=entry_spot)
if validation_error:
validation_label.set_text(validation_error)
render_result_state("Scenario validation failed", validation_error, tone="warning")
@@ -371,12 +367,18 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
margin_call_ltv=float(ltv_input.value or 0.0),
)
except (ValueError, KeyError) as exc:
render_seeded_summary(entry_spot=None, entry_spot_error=None)
entry_spot, entry_error = derive_entry_spot()
render_seeded_summary(entry_spot=entry_spot, entry_spot_error=entry_error)
if entry_spot is None:
entry_spot_hint.set_text("Entry spot unavailable until the scenario dates are valid.")
validation_label.set_text(str(exc))
render_result_state("Scenario validation failed", str(exc), tone="warning")
return
except Exception:
render_seeded_summary(entry_spot=None, entry_spot_error=None)
entry_spot, entry_error = derive_entry_spot()
render_seeded_summary(entry_spot=entry_spot, entry_spot_error=entry_error)
if entry_spot is None:
entry_spot_hint.set_text("Entry spot unavailable until the scenario dates are valid.")
message = "Backtest failed. Please verify the scenario inputs and try again."
logger.exception(
"Backtest page run failed for workspace=%s symbol=%s start=%s end=%s template=%s units=%s loan=%s margin_call_ltv=%s",