{
    "type": "object",
    "required": [
        "manufacturer",
        "filaments"
    ],
    "properties": {
        "manufacturer": {
            "type": "string"
        },
        "filaments": {
            "type": "array",
            "minItems": 1,
            "uniqueItems": true,
            "items": {
                "type": "object",
                "required": [
                    "name",
                    "density",
                    "material",
                    "weights",
                    "diameters",
                    "colors"
                ],
                "properties": {
                    "name": {
                        "$comment": "Name of the filament, typically contains {color_name} but not strictly enforced",
                        "type": "string"
                    },
                    "material": {
                        "$comment": "Valid materials must be uppercase letters and numbers, optionally separated by + or -. Optionally ends with -CF or -GF followed by a number, or a single-letter variant suffix (-X, -T). Examples: ABS, ABS-CF, ABS-T, ASA-X, PC+ABS, PC+ABS-CF10.",
                        "type": "string",
                        "pattern": "^[A-Z0-9]+(\\+[A-Z0-9]+)*(-(CF\\d{0,2}|GF\\d{0,2}|\\d{2}[AD]|X|T))?\\+?$"
                    },
                    "density": {
                        "type": "number",
                        "exclusiveMinimum": 0
                    },
                    "weights": {
                        "type": "array",
                        "minItems": 1,
                        "uniqueItems": true,
                        "items": {
                            "type": "object",
                            "required": [
                                "weight"
                            ],
                            "properties": {
                                "weight": {
                                    "type": "number",
                                    "minimum": 0
                                },
                                "spool_weight": {
                                    "type": "number",
                                    "minimum": 0
                                },
                                "spool_type": {
                                    "$comment": "Material of the physical spool. 'refill' and 'unknow' are legacy source sentinels retained for compatibility; use is_refill for new refill data.",
                                    "enum": [
                                        null,
                                        "plastic",
                                        "cardboard",
                                        "metal",
                                        "refill",
                                        "unknow"
                                    ]
                                },
                                "is_refill": {
                                    "$comment": "True when the product is supplied without a spool. Preferred over the legacy spool_type value 'refill'.",
                                    "type": "boolean"
                                }
                            },
                            "allOf": [
                                {
                                    "if": {
                                        "properties": {
                                            "is_refill": {
                                                "const": true
                                            }
                                        },
                                        "required": [
                                            "is_refill"
                                        ]
                                    },
                                    "then": {
                                        "properties": {
                                            "spool_type": {
                                                "enum": [
                                                    null,
                                                    "refill"
                                                ]
                                            }
                                        }
                                    }
                                },
                                {
                                    "if": {
                                        "properties": {
                                            "spool_type": {
                                                "const": "refill"
                                            }
                                        },
                                        "required": [
                                            "spool_type"
                                        ]
                                    },
                                    "then": {
                                        "properties": {
                                            "is_refill": {
                                                "const": true
                                            }
                                        }
                                    }
                                }
                            ]
                        }
                    },
                    "diameters": {
                        "type": "array",
                        "minItems": 1,
                        "uniqueItems": true,
                        "items": {
                            "type": "number",
                            "exclusiveMinimum": 0
                        }
                    },
                    "extruder_temp": {
                        "type": "integer"
                    },
                    "extruder_temp_range": {
                        "$comment": "Temperature range for the extruder in degrees Celsius.",
                        "type": "array",
                        "minItems": 2,
                        "maxItems": 2,
                        "items": {
                            "type": "integer"
                        }
                    },
                    "bed_temp": {
                        "type": "integer"
                    },
                    "bed_temp_range": {
                        "$comment": "Temperature range for the bed in degrees Celsius.",
                        "type": "array",
                        "minItems": 2,
                        "maxItems": 2,
                        "items": {
                            "type": "integer"
                        }
                    },
                    "fill": {
                        "$comment": "Type of fill material.",
                        "enum": [
                            null,
                            "glass fiber",
                            "carbon fiber",
                            "wood"
                        ]
                    },
                    "finish": {
                        "$comment": "Surface finish. Don't set if it's not explicitly stated by the manufacturer.",
                        "enum": [
                            null,
                            "matte",
                            "glossy"
                        ]
                    },
                    "multi_color_direction": {
                        "$comment": "Coaxial = the color changes depending on print direction, longitudinal = the color changes along the duration of the print.",
                        "enum": [
                            null,
                            "coaxial",
                            "longitudinal"
                        ]
                    },
                    "pattern": {
                        "$comment": "Surface details",
                        "enum": [
                            null,
                            "marble",
                            "sparkle"
                        ]
                    },
                    "translucent": {
                        "$comment": "True if the filament is at least partly see-through",
                        "type": "boolean"
                    },
                    "glow": {
                        "$comment": "True if the filament has a glow-in-the-dark effect",
                        "type": "boolean"
                    },
                    "colors": {
                        "type": "array",
                        "minItems": 1,
                        "uniqueItems": true,
                        "items": {
                            "type": "object",
                            "oneOf": [
                                {
                                    "required": [
                                        "name",
                                        "hex"
                                    ]
                                },
                                {
                                    "required": [
                                        "name",
                                        "hexes"
                                    ]
                                }
                            ],
                            "properties": {
                                "name": {
                                    "type": "string"
                                },
                                "hex": {
                                    "$comment": "For a single-color filament.",
                                    "type": "string",
                                    "pattern": "^[0-9a-fA-F]{6}([0-9a-fA-F]{2})?$"
                                },
                                "hexes": {
                                    "$comment": "For a multi-color filament.",
                                    "type": "array",
                                    "minItems": 2,
                                    "uniqueItems": true,
                                    "items": {
                                        "type": "string",
                                        "pattern": "^[0-9a-fA-F]{6}([0-9a-fA-F]{2})?$"
                                    }
                                },
                                "finish": {
                                    "$comment": "Surface finish of this color. Don't set if it's not explicitly stated by the manufacturer.",
                                    "enum": [
                                        null,
                                        "matte",
                                        "glossy"
                                    ]
                                },
                                "multi_color_direction": {
                                    "$comment": "Coaxial = the color changes depending on print direction, longitudinal = the color changes along the duration of the print.",
                                    "enum": [
                                        null,
                                        "coaxial",
                                        "longitudinal"
                                    ]
                                },
                                "pattern": {
                                    "$comment": "Surface details of this color",
                                    "enum": [
                                        null,
                                        "marble",
                                        "sparkle"
                                    ]
                                },
                                "translucent": {
                                    "$comment": "True if this color is at least partly see-through",
                                    "type": "boolean"
                                },
                                "glow": {
                                    "$comment": "True if this color has a glow-in-the-dark effect",
                                    "type": "boolean"
                                },
                                "codes": {
                                    "$comment": "Manufacturer product codes, SKUs, or platform variant IDs for this color variant.",
                                    "type": "array",
                                    "items": {
                                        "type": "string",
                                        "minLength": 1
                                    },
                                    "uniqueItems": true,
                                    "minItems": 1
                                },
                                "eans": {
                                    "$comment": "EAN/GTIN barcodes for the spooled version of this color.",
                                    "type": "array",
                                    "items": {
                                        "type": "string",
                                        "pattern": "^[0-9]{8,14}$"
                                    },
                                    "uniqueItems": true,
                                    "minItems": 1
                                },
                                "eans_refill": {
                                    "$comment": "EAN/GTIN barcodes for the refill version of this color.",
                                    "type": "array",
                                    "items": {
                                        "type": "string",
                                        "pattern": "^[0-9]{8,14}$"
                                    },
                                    "uniqueItems": true,
                                    "minItems": 1
                                }
                            }
                        }
                    },
                    "country_of_origin": {
                        "$comment": "Country where the filament was manufactured (e.g. 'USA', 'China', 'Germany').",
                        "type": "string"
                    },
                    "sds_url": {
                        "$comment": "Link to the Safety Data Sheet (SDS).",
                        "type": "string",
                        "format": "uri"
                    },
                    "tds_url": {
                        "$comment": "Link to the Technical Data Sheet (TDS).",
                        "type": "string",
                        "format": "uri"
                    }
                }
            }
        }
    }
}