{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "$id": "troika-background",
    "title": "Troika! Background",
    "description": "A character background in the Troika! RPG system",
    "type": "object",
    "properties": {
        "id": {
            "type": "integer",
            "minimum": 11,
            "maximum": 66,
            "description": "Background ID for d66 table"
        },
        "name": {
            "type": "string",
            "description": "Background name"
        },
        "description": {
            "type": "string",
            "description": "Background lore and setting description"
        },
        "possessions": {
            "type": "array",
            "items": {
                "$ref": "#/definitions/possession"
            },
            "description": "Starting possessions for this background"
        },
        "advancedSkills": {
            "type": "array",
            "items": {
                "$ref": "#/definitions/advancedSkill"
            },
            "description": "Advanced skills granted by this background"
        },
        "spells": {
            "type": "array",
            "items": {
                "$ref": "#/definitions/backgroundSpell"
            },
            "description": "Spells granted by this background"
        },
        "special": {
            "type": "array",
            "items": {
                "type": "string"
            },
            "description": "Special abilities and rules for this background"
        },
        "overrideBaselinePossessions": {
            "type": "boolean",
            "default": false,
            "description": "If true, this background overrides universal starting possessions (e.g., Zoanthrop gets no starting possessions)"
        },
        "rollTable": {
            "type": "string",
            "pattern": "^d\\d+$",
            "description": "Die type for background table (e.g., 'd66')"
        },
        "rollValue": {
            "oneOf": [
                {
                    "type": "integer",
                    "description": "Single roll value"
                },
                {
                    "type": "string",
                    "description": "Roll range (e.g., '11-16', '21-26')"
                }
            ],
            "description": "Roll value(s) for this background on the table"
        },
        "tags": {
            "type": "array",
            "items": {
                "type": "string"
            },
            "description": "Thematic tags for organization"
        },
        "restrictions": {
            "type": "array",
            "items": {
                "type": "string"
            },
            "description": "Restrictions or limitations of this background"
        },
        "advancement": {
            "type": "object",
            "properties": {
                "restrictions": {
                    "type": "array",
                    "items": {
                        "type": "string"
                    },
                    "description": "Skills that have advancement restrictions"
                },
                "bonuses": {
                    "type": "array",
                    "items": {
                        "type": "string"
                    },
                    "description": "Advancement bonuses or special rules"
                }
            },
            "description": "Special advancement rules for this background"
        },
        "@context": {
            "type": [
                "string",
                "object",
                "array"
            ],
            "description": "JSON-LD context reference or inline context object"
        },
        "@id": {
            "type": "string",
            "description": "JSON-LD unique resource identifier URI"
        },
        "@type": {
            "type": [
                "string",
                "array"
            ],
            "description": "JSON-LD semantic resource type"
        }
    },
    "required": [
        "id",
        "name",
        "description",
        "possessions",
        "advancedSkills"
    ],
    "definitions": {
        "possession": {
            "type": "object",
            "properties": {
                "name": {
                    "type": "string",
                    "description": "Item name"
                },
                "quantity": {
                    "oneOf": [
                        {
                            "type": "integer",
                            "minimum": 1,
                            "description": "Fixed quantity"
                        },
                        {
                            "type": "string",
                            "description": "Dice expression (e.g., '1d6', '2d6')"
                        }
                    ],
                    "default": 1,
                    "description": "Number of items"
                },
                "description": {
                    "type": "string",
                    "description": "Item description or special properties"
                },
                "alternatives": {
                    "type": "array",
                    "items": {
                        "$ref": "#/definitions/possession"
                    },
                    "description": "Alternative items to choose from (e.g., 'or', 'either/or')"
                },
                "conditional": {
                    "type": "string",
                    "description": "Conditions for receiving this item"
                },
                "properties": {
                    "type": "array",
                    "items": {
                        "type": "string"
                    },
                    "description": "Special mechanical properties"
                },
                "category": {
                    "type": "string",
                    "enum": [
                        "armor",
                        "clothing",
                        "companion",
                        "component",
                        "container",
                        "regalia",
                        "shield",
                        "specimen",
                        "tool",
                        "weapon"
                    ],
                    "description": "Broad grouping of this possession for UI organization"
                },
                "bonuses": {
                    "type": "array",
                    "items": {
                        "$ref": "#/definitions/bonus"
                    },
                    "description": "Bonuses this item provides"
                },
                "damageAs": {
                    "type": "string",
                    "description": "Damage table reference for weapons"
                },
                "armor": {
                    "type": "integer",
                    "minimum": 0,
                    "maximum": 3,
                    "description": "Armor value if this is armor"
                },
                "slots": {
                    "oneOf": [
                        {
                            "type": "integer",
                            "minimum": 0,
                            "description": "Fixed inventory slots"
                        },
                        {
                            "type": "string",
                            "description": "Variable slots formula"
                        }
                    ],
                    "description": "Inventory slots required"
                },
                "charges": {
                    "type": "integer",
                    "description": "Number of charges for energy weapons"
                },
                "capacity": {
                    "type": "integer",
                    "description": "Carrying capacity bonus"
                },
                "livingCreature": {
                    "type": "boolean",
                    "default": false,
                    "description": "Whether this is a living creature (animal companion, etc.)"
                },
                "creatureStats": {
                    "type": "object",
                    "properties": {
                        "skill": {
                            "type": "integer"
                        },
                        "stamina": {
                            "type": "integer"
                        },
                        "initiative": {
                            "type": "integer"
                        },
                        "armor": {
                            "type": "integer"
                        },
                        "mien": {
                            "type": "array",
                            "items": {
                                "type": "string"
                            }
                        },
                        "special": {
                            "type": "array",
                            "items": {
                                "type": "string"
                            }
                        }
                    },
                    "description": "Stats for living creature possessions"
                }
            },
            "required": [
                "name"
            ]
        },
        "backgroundSpell": {
            "type": "object",
            "properties": {
                "name": {
                    "type": "string",
                    "description": "Spell name"
                },
                "rank": {
                    "type": "integer",
                    "minimum": 1,
                    "description": "Starting rank in this spell"
                }
            },
            "required": [
                "name",
                "rank"
            ]
        },
        "advancedSkill": {
            "type": "object",
            "properties": {
                "name": {
                    "type": "string",
                    "description": "Skill name"
                },
                "rank": {
                    "type": "integer",
                    "minimum": 1,
                    "description": "Starting rank in this skill"
                },
                "type": {
                    "type": "string",
                    "enum": [
                        "skill",
                        "spell",
                        "language",
                        "secret",
                        "weapon"
                    ],
                    "default": "skill",
                    "description": "Type of advanced skill"
                },
                "specialization": {
                    "type": "string",
                    "description": "Specialization or specific focus (e.g., language name, secret sign type)"
                },
                "conditional": {
                    "type": "string",
                    "description": "Conditions or restrictions on this skill"
                }
            },
            "required": [
                "name",
                "rank"
            ]
        },
        "bonus": {
            "type": "object",
            "properties": {
                "type": {
                    "type": "string",
                    "enum": [
                        "skill",
                        "damage",
                        "armor",
                        "special",
                        "carry"
                    ]
                },
                "target": {
                    "type": "string",
                    "description": "What the bonus applies to"
                },
                "value": {
                    "type": "integer",
                    "description": "Bonus amount"
                },
                "condition": {
                    "type": "string",
                    "description": "When the bonus applies"
                }
            },
            "required": [
                "type",
                "target",
                "value"
            ]
        }
    }
}