39 lines
1.8 KiB
Python
39 lines
1.8 KiB
Python
"""Compare calculable CNY costs on the same destination and billing basis."""
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from decimal import Decimal,ROUND_HALF_UP
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from .quote_fees import charge_details
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def speed_difference_lines(intent, book, rates, fees):
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from .quote_engine import quantity, number, select_timed_rates,select_cheapest_rates
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groups = {}
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for rate in rates:
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key = (rate['origin'], rate['zone'], rate['kind'], rate['unit'], rate['tax'])
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groups.setdefault(key, []).append(rate)
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lines = []
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for (origin, zone, kind, unit, tax), candidates in groups.items():
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costs = []
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cheapest=intent.get('selection')=='fastest_cheapest'
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comparison=(select_cheapest_rates(intent,book,candidates,fees) if cheapest
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else select_timed_rates(candidates,slowest=True))
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for selected in (select_timed_rates(candidates),comparison):
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values = []
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for rate in selected:
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amount = quantity(intent, rate)
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if amount is not None:
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total=amount * Decimal(rate['price']) + charge_details(intent, rate, fees, book)['cny']
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values.append(total.quantize(Decimal('.01'),rounding=ROUND_HALF_UP))
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costs.append(values)
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fast, slow = costs
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if not fast or not slow:
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continue
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low, high = min(fast) - max(slow), max(fast) - min(slow)
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label = ' · '.join(value for value in (origin, zone, '包税' if tax == 'included' else '不包税',
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'海派' if kind == 'parcel' else '海卡/海铁') if value)
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difference = number(low) if low == high else number(low) + '至' + number(high)
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pair='最快与最便宜方案' if cheapest else '快慢方案'
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lines.append(f'- {label}，{pair}可计算运费差额为{difference}元。')
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return lines
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