Christopher Wiebe
b451f83174
Captures the pre-Godot-port state of the codebase. This is the rollback anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md). All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
81 lines
3.4 KiB
C#
81 lines
3.4 KiB
C#
using Theriapolis.Core.Rules.Reputation;
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namespace Theriapolis.Core.Rules.Dialogue;
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/// <summary>
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/// Phase 6 M3 — disposition-driven shop modifiers per the plan §4.6.
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///
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/// NEMESIS → service refused
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/// HOSTILE → service refused
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/// ANTAGONISTIC..UNFRIENDLY → +25% prices, +10% sell discount
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/// NEUTRAL → base prices
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/// FAVORABLE → -10% buy
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/// FRIENDLY → -20% buy
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/// ALLIED → -30% buy
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/// CHAMPION → -40% buy
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///
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/// Phase 6 M3 ships buy-side adjustment only; sell-side is mirrored at
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/// 50% of the buy modifier so a friendly merchant pays a small premium
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/// without dual-tunable knobs.
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/// </summary>
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public static class ShopPricing
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{
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/// <summary>True if the player can shop at all given the disposition score.</summary>
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public static bool ServiceAvailable(int dispositionScore)
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{
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var label = DispositionLabels.For(dispositionScore);
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return label != DispositionLabel.Nemesis && label != DispositionLabel.Hostile;
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}
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/// <summary>
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/// Multiplier applied to a price the player pays. 1.0 = base; >1 =
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/// markup; <1 = discount. Caller multiplies the item's listed cost
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/// and rounds.
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/// </summary>
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public static float BuyMultiplier(int dispositionScore)
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{
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var label = DispositionLabels.For(dispositionScore);
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return label switch
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{
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DispositionLabel.Nemesis => 99f, // shouldn't be called; sentinel
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DispositionLabel.Hostile => 99f,
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DispositionLabel.Antagonistic => 1.25f,
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DispositionLabel.Unfriendly => 1.25f,
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DispositionLabel.Neutral => 1.00f,
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DispositionLabel.Favorable => 0.90f,
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DispositionLabel.Friendly => 0.80f,
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DispositionLabel.Allied => 0.70f,
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DispositionLabel.Champion => 0.60f,
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_ => 1.00f,
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};
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}
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/// <summary>Multiplier applied to a price the merchant pays the player on sell-back.</summary>
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public static float SellMultiplier(int dispositionScore)
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{
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// Mirror buy modifier toward 1.0 by 50%: friendly buy = 0.80 →
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// friendly sell = 0.60 (you still take a haircut), antagonistic
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// buy = 1.25 → antagonistic sell = 0.30.
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var label = DispositionLabels.For(dispositionScore);
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return label switch
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{
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DispositionLabel.Antagonistic => 0.35f,
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DispositionLabel.Unfriendly => 0.40f,
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DispositionLabel.Neutral => 0.50f,
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DispositionLabel.Favorable => 0.55f,
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DispositionLabel.Friendly => 0.60f,
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DispositionLabel.Allied => 0.65f,
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DispositionLabel.Champion => 0.70f,
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_ => 0f, // refused at Hostile / Nemesis
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};
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}
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/// <summary>Buy price for one unit (rounded up). Cost is in the item's "cost_fang" or equivalent unit.</summary>
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public static int BuyPriceFor(int baseCost, int dispositionScore)
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=> System.Math.Max(1, (int)System.Math.Ceiling(baseCost * BuyMultiplier(dispositionScore)));
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/// <summary>Sell price for one unit (rounded down).</summary>
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public static int SellPriceFor(int baseCost, int dispositionScore)
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=> System.Math.Max(0, (int)System.Math.Floor(baseCost * SellMultiplier(dispositionScore)));
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}
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