feat(api): implement Diablo-style item affix system

Add procedural item generation with affix naming system:
- Items with RARE/EPIC/LEGENDARY rarity get dynamic names
- Prefixes (e.g., "Flaming") add elemental damage, material bonuses
- Suffixes (e.g., "of Strength") add stat bonuses
- Affix count scales with rarity: RARE=1, EPIC=2, LEGENDARY=3

New files:
- models/affixes.py: Affix and BaseItemTemplate dataclasses
- services/affix_loader.py: YAML-based affix pool loading
- services/base_item_loader.py: Base item template loading
- services/item_generator.py: Main procedural generation service
- data/affixes/prefixes.yaml: 14 prefix definitions
- data/affixes/suffixes.yaml: 15 suffix definitions
- data/base_items/weapons.yaml: 12 weapon templates
- data/base_items/armor.yaml: 12 armor templates
- tests/test_item_generator.py: 34 comprehensive tests

Modified:
- enums.py: Added AffixType and AffixTier enums
- items.py: Added affix tracking fields (applied_affixes, generated_name)

Example output: "Frozen Dagger of the Bear" (EPIC with ice damage + STR/CON)
This commit is contained in:
2025-11-26 17:57:34 -06:00
parent f3ac0c8647
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# Item Prefix Affixes
# Prefixes appear before the item name: "Flaming Dagger"
#
# Affix Structure:
# affix_id: Unique identifier
# name: Display name (what appears in the item name)
# affix_type: "prefix"
# tier: "minor" (RARE), "major" (EPIC), "legendary" (LEGENDARY only)
# description: Flavor text describing the effect
# stat_bonuses: Dict of stat_name -> bonus value
# defense_bonus: Direct defense bonus
# resistance_bonus: Direct resistance bonus
# damage_bonus: Flat damage bonus (weapons)
# damage_type: Elemental damage type
# elemental_ratio: Portion converted to elemental (0.0-1.0)
# crit_chance_bonus: Added to crit chance
# crit_multiplier_bonus: Added to crit multiplier
# allowed_item_types: [] = all types, or ["weapon", "armor"]
# required_rarity: null = any, or "legendary"
prefixes:
# ==================== ELEMENTAL PREFIXES (FIRE) ====================
flaming:
affix_id: "flaming"
name: "Flaming"
affix_type: "prefix"
tier: "minor"
description: "Imbued with fire magic, dealing bonus fire damage"
damage_type: "fire"
elemental_ratio: 0.25
damage_bonus: 3
allowed_item_types: ["weapon"]
blazing:
affix_id: "blazing"
name: "Blazing"
affix_type: "prefix"
tier: "major"
description: "Wreathed in intense flames"
damage_type: "fire"
elemental_ratio: 0.35
damage_bonus: 6
allowed_item_types: ["weapon"]
# ==================== ELEMENTAL PREFIXES (ICE) ====================
frozen:
affix_id: "frozen"
name: "Frozen"
affix_type: "prefix"
tier: "minor"
description: "Enchanted with frost magic"
damage_type: "ice"
elemental_ratio: 0.25
damage_bonus: 3
allowed_item_types: ["weapon"]
glacial:
affix_id: "glacial"
name: "Glacial"
affix_type: "prefix"
tier: "major"
description: "Encased in eternal ice"
damage_type: "ice"
elemental_ratio: 0.35
damage_bonus: 6
allowed_item_types: ["weapon"]
# ==================== ELEMENTAL PREFIXES (LIGHTNING) ====================
shocking:
affix_id: "shocking"
name: "Shocking"
affix_type: "prefix"
tier: "minor"
description: "Crackles with electrical energy"
damage_type: "lightning"
elemental_ratio: 0.25
damage_bonus: 3
allowed_item_types: ["weapon"]
thundering:
affix_id: "thundering"
name: "Thundering"
affix_type: "prefix"
tier: "major"
description: "Charged with the power of storms"
damage_type: "lightning"
elemental_ratio: 0.35
damage_bonus: 6
allowed_item_types: ["weapon"]
# ==================== MATERIAL PREFIXES ====================
iron:
affix_id: "iron"
name: "Iron"
affix_type: "prefix"
tier: "minor"
description: "Reinforced with sturdy iron"
stat_bonuses:
constitution: 1
defense_bonus: 2
steel:
affix_id: "steel"
name: "Steel"
affix_type: "prefix"
tier: "major"
description: "Forged from fine steel"
stat_bonuses:
constitution: 2
strength: 1
defense_bonus: 4
# ==================== QUALITY PREFIXES ====================
sharp:
affix_id: "sharp"
name: "Sharp"
affix_type: "prefix"
tier: "minor"
description: "Honed to a fine edge"
damage_bonus: 3
crit_chance_bonus: 0.02
allowed_item_types: ["weapon"]
keen:
affix_id: "keen"
name: "Keen"
affix_type: "prefix"
tier: "major"
description: "Razor-sharp edge that finds weak points"
damage_bonus: 5
crit_chance_bonus: 0.04
allowed_item_types: ["weapon"]
# ==================== DEFENSIVE PREFIXES ====================
sturdy:
affix_id: "sturdy"
name: "Sturdy"
affix_type: "prefix"
tier: "minor"
description: "Built to withstand punishment"
defense_bonus: 3
allowed_item_types: ["armor"]
reinforced:
affix_id: "reinforced"
name: "Reinforced"
affix_type: "prefix"
tier: "major"
description: "Heavily reinforced for maximum protection"
defense_bonus: 5
resistance_bonus: 2
allowed_item_types: ["armor"]
# ==================== LEGENDARY PREFIXES ====================
infernal:
affix_id: "infernal"
name: "Infernal"
affix_type: "prefix"
tier: "legendary"
description: "Burns with hellfire"
damage_type: "fire"
elemental_ratio: 0.45
damage_bonus: 12
allowed_item_types: ["weapon"]
required_rarity: "legendary"
vorpal:
affix_id: "vorpal"
name: "Vorpal"
affix_type: "prefix"
tier: "legendary"
description: "Cuts through anything with supernatural precision"
damage_bonus: 10
crit_chance_bonus: 0.08
crit_multiplier_bonus: 0.5
allowed_item_types: ["weapon"]
required_rarity: "legendary"

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# Item Suffix Affixes
# Suffixes appear after the item name: "Dagger of Strength"
#
# Suffix naming convention:
# - Minor tier: "of [Stat]" (e.g., "of Strength")
# - Major tier: "of the [Animal/Element]" (e.g., "of the Bear")
# - Legendary tier: "of the [Mythical]" (e.g., "of the Titan")
suffixes:
# ==================== STAT SUFFIXES (MINOR) ====================
of_strength:
affix_id: "of_strength"
name: "of Strength"
affix_type: "suffix"
tier: "minor"
description: "Grants physical power"
stat_bonuses:
strength: 2
of_dexterity:
affix_id: "of_dexterity"
name: "of Dexterity"
affix_type: "suffix"
tier: "minor"
description: "Grants agility and precision"
stat_bonuses:
dexterity: 2
of_constitution:
affix_id: "of_constitution"
name: "of Fortitude"
affix_type: "suffix"
tier: "minor"
description: "Grants endurance"
stat_bonuses:
constitution: 2
of_intelligence:
affix_id: "of_intelligence"
name: "of Intelligence"
affix_type: "suffix"
tier: "minor"
description: "Grants magical aptitude"
stat_bonuses:
intelligence: 2
of_wisdom:
affix_id: "of_wisdom"
name: "of Wisdom"
affix_type: "suffix"
tier: "minor"
description: "Grants insight and perception"
stat_bonuses:
wisdom: 2
of_charisma:
affix_id: "of_charisma"
name: "of Charm"
affix_type: "suffix"
tier: "minor"
description: "Grants social influence"
stat_bonuses:
charisma: 2
of_luck:
affix_id: "of_luck"
name: "of Fortune"
affix_type: "suffix"
tier: "minor"
description: "Grants favor from fate"
stat_bonuses:
luck: 2
# ==================== ENHANCED STAT SUFFIXES (MAJOR) ====================
of_the_bear:
affix_id: "of_the_bear"
name: "of the Bear"
affix_type: "suffix"
tier: "major"
description: "Grants the might and endurance of a bear"
stat_bonuses:
strength: 4
constitution: 2
of_the_fox:
affix_id: "of_the_fox"
name: "of the Fox"
affix_type: "suffix"
tier: "major"
description: "Grants the cunning and agility of a fox"
stat_bonuses:
dexterity: 4
luck: 2
of_the_owl:
affix_id: "of_the_owl"
name: "of the Owl"
affix_type: "suffix"
tier: "major"
description: "Grants the wisdom and insight of an owl"
stat_bonuses:
intelligence: 3
wisdom: 3
# ==================== DEFENSIVE SUFFIXES ====================
of_protection:
affix_id: "of_protection"
name: "of Protection"
affix_type: "suffix"
tier: "minor"
description: "Offers physical protection"
defense_bonus: 3
of_warding:
affix_id: "of_warding"
name: "of Warding"
affix_type: "suffix"
tier: "major"
description: "Wards against physical and magical harm"
defense_bonus: 5
resistance_bonus: 3
# ==================== LEGENDARY SUFFIXES ====================
of_the_titan:
affix_id: "of_the_titan"
name: "of the Titan"
affix_type: "suffix"
tier: "legendary"
description: "Grants titanic strength and endurance"
stat_bonuses:
strength: 8
constitution: 4
required_rarity: "legendary"
of_the_wind:
affix_id: "of_the_wind"
name: "of the Wind"
affix_type: "suffix"
tier: "legendary"
description: "Swift as the wind itself"
stat_bonuses:
dexterity: 8
luck: 4
crit_chance_bonus: 0.05
required_rarity: "legendary"
of_invincibility:
affix_id: "of_invincibility"
name: "of Invincibility"
affix_type: "suffix"
tier: "legendary"
description: "Grants supreme protection"
defense_bonus: 10
resistance_bonus: 8
required_rarity: "legendary"