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68 lines
2.4 KiB
Python
68 lines
2.4 KiB
Python
"""Render a Plan as a plain-text sense-check table.
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The DB-less inspection harness prints this so the modelled package — its SAP
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band transition, cost, and each Plan Measure's attributed SAP / bill impact —
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can be eyeballed and debugged by hand. Pure presentation: it reads a `Plan`
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domain object and returns a string, computing nothing.
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"""
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from __future__ import annotations
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from typing import Optional
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from datatypes.epc.domain.epc import Epc
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from domain.modelling.plan import Plan
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_KG_PER_TONNE = 1000.0
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def _band(sap_continuous: float) -> str:
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return Epc.from_sap_continuous(sap_continuous).value
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def _signed_gbp(value: Optional[float]) -> str:
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return "n/a" if value is None else f"{value:+,.0f}"
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def _money(value: Optional[float]) -> str:
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if value is None:
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return "n/a"
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sign = "-" if value < 0 else ""
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return f"{sign}£{abs(value):,.0f}"
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def _signed_kwh(value: Optional[float]) -> str:
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return "n/a" if value is None else f"{value:+,.0f}"
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def format_plan_table(plan: Plan) -> str:
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"""A multi-line table: one package summary line, then one line per Plan
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Measure (signed so positive is an improvement / a saving)."""
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co2_tonnes_saved: float = plan.co2_savings_kg_per_yr / _KG_PER_TONNE
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header = (
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f"Plan SAP {plan.baseline.sap_continuous:.1f} ({_band(plan.baseline.sap_continuous)})"
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f" -> {plan.post_sap_continuous:.1f} ({plan.post_epc_rating.value})"
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f" CO2 saved {co2_tonnes_saved:.2f} t/yr"
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f" cost £{plan.cost_of_works:,.0f} (+£{plan.contingency_cost:,.0f} cont.)"
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f" bill saved {_money(plan.energy_bill_savings)}/yr"
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)
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valuation = plan.valuation
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valuation_line = f" valuation uplift {valuation.average_pct:+.1%}"
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if valuation.average_value is not None and valuation.post_retrofit_value is not None:
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valuation_line += (
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f" ({_money(valuation.average_value)}"
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f" -> {_money(valuation.post_retrofit_value)})"
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)
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columns = (
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f" {'measure':<30}{'SAP':>7}{'cost':>10}"
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f"{'kWh/yr':>10}{'£/yr':>9}"
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)
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rows = [
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f" {measure.measure_type:<30}"
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f"{measure.impact.sap_points:>+7.1f}"
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f"{('£' + format(measure.cost.total, ',.0f')):>10}"
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f"{_signed_kwh(measure.kwh_savings):>10}"
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f"{_signed_gbp(measure.energy_cost_savings):>9}"
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for measure in plan.measures
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]
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return "\n".join([header, valuation_line, columns, *rows])
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