{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:akari-video:schema:gen-models:v1",
  "title": "AKARI Video generation model catalog",
  "type": "object",
  "additionalProperties": false,
  "required": ["version", "models"],
  "properties": {
    "version": { "const": 1 },
    "models": {
      "type": "array",
      "items": { "$ref": "#/$defs/model" }
    }
  },
  "$defs": {
    "referenceInput": {
      "type": "object",
      "additionalProperties": false,
      "required": ["max"],
      "properties": {
        "max": { "type": ["integer", "null"], "minimum": 0 },
        "tag": { "type": "string", "minLength": 1 },
        "tag_joiner": { "enum": ["", " "], "default": "", "description": "Separator between tag prefix and 1-based reference number; omitted means empty string." },
        "seconds_each": { "type": ["number", "null"], "exclusiveMinimum": 0 },
        "seconds_total": { "type": ["number", "null"], "exclusiveMinimum": 0 }
      }
    },
    "inputs": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "first_frame",
        "last_frame",
        "reference_images",
        "reference_videos",
        "reference_audios",
        "source_video",
        "frames_and_refs_exclusive",
        "negative_prompt",
        "camera",
        "extra_allowed"
      ],
      "properties": {
        "first_frame": { "enum": ["required", "optional", "none"] },
        "last_frame": { "enum": ["required", "optional", "none"] },
        "reference_images": { "$ref": "#/$defs/referenceInput" },
        "reference_videos": { "$ref": "#/$defs/referenceInput" },
        "reference_audios": { "$ref": "#/$defs/referenceInput" },
        "source_video": {
          "type": "array",
          "uniqueItems": true,
          "items": { "enum": ["edit", "extend", "motion", "frame-edit"] }
        },
        "frames_and_refs_exclusive": { "type": "boolean" },
        "negative_prompt": { "type": "boolean" },
        "camera": { "enum": ["prose", "bracket", "trajectory"] },
        "extra_allowed": {
          "type": "array",
          "uniqueItems": true,
          "items": { "type": "string", "minLength": 1 }
        }
      }
    },
    "durationFormat": {
      "oneOf": [
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["type"],
          "properties": { "type": { "const": "integer" } }
        },
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["type"],
          "properties": {
            "type": { "const": "string" },
            "suffix": { "type": "string", "minLength": 1 },
            "auto": { "type": "boolean" }
          }
        }
      ]
    },
    "durationEnum": {
      "type": "object",
      "additionalProperties": false,
      "required": ["kind", "values", "default", "format"],
      "properties": {
        "kind": { "const": "enum" },
        "values": {
          "type": "array",
          "minItems": 1,
          "uniqueItems": true,
          "items": { "type": "integer", "minimum": 0 }
        },
        "default": { "type": ["integer", "null"], "minimum": 0 },
        "format": { "$ref": "#/$defs/durationFormat" }
      }
    },
    "durationRange": {
      "type": "object",
      "additionalProperties": false,
      "required": ["kind", "min", "max", "step", "default", "format"],
      "properties": {
        "kind": { "const": "range" },
        "min": { "type": "integer", "minimum": 0 },
        "max": { "type": "integer", "minimum": 0 },
        "step": { "type": "integer", "exclusiveMinimum": 0 },
        "default": { "type": ["integer", "null"], "minimum": 0 },
        "format": { "$ref": "#/$defs/durationFormat" }
      }
    },
    "price": {
      "type": "object",
      "additionalProperties": false,
      "required": ["unit", "by_resolution", "audio_multiplier"],
      "properties": {
        "unit": { "enum": ["usd_per_second", "usd_per_image", "usd_per_clip"] },
        "by_resolution": {
          "type": "object",
          "propertyNames": { "type": "string" },
          "additionalProperties": { "type": "number", "minimum": 0 }
        },
        "audio_multiplier": { "type": ["number", "null"], "exclusiveMinimum": 0 }
      }
    },
    "model": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "id",
        "kind",
        "provider",
        "family",
        "endpoint",
        "inputs",
        "duration",
        "resolutions",
        "aspects",
        "audio_out",
        "seed",
        "price",
        "as_of",
        "source_url",
        "price_url",
        "verified",
        "calibration"
      ],
      "properties": {
        "id": { "type": "string", "minLength": 1 },
        "kind": { "enum": ["video", "image"] },
        "provider": { "type": "string", "minLength": 1 },
        "family": { "type": "string", "minLength": 1 },
        "endpoint": { "type": "string", "minLength": 1 },
        "inputs": { "$ref": "#/$defs/inputs" },
        "duration": {
          "oneOf": [
            { "$ref": "#/$defs/durationEnum" },
            { "$ref": "#/$defs/durationRange" },
            { "type": "null" }
          ]
        },
        "resolutions": {
          "type": ["array", "null"],
          "uniqueItems": true,
          "items": { "type": "string", "minLength": 1 }
        },
        "aspects": {
          "type": ["array", "null"],
          "uniqueItems": true,
          "items": { "type": "string", "minLength": 1 }
        },
        "audio_out": { "enum": [true, false, "always"] },
        "seed": { "type": "boolean" },
        "price": { "oneOf": [{ "$ref": "#/$defs/price" }, { "type": "null" }] },
        "as_of": { "type": "string", "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$" },
        "source_url": { "type": "string", "pattern": "^https://" },
        "price_url": { "type": ["string", "null"], "pattern": "^https://" },
        "verified": { "const": "documented" },
        "calibration": {
          "type": "array",
          "uniqueItems": true,
          "items": { "type": "string", "minLength": 1 }
        }
      },
      "allOf": [
        {
          "if": { "properties": { "kind": { "const": "image" } }, "required": ["kind"] },
          "then": {
            "type": "object",
            "properties": {
              "duration": { "type": "null" },
              "audio_out": { "const": false },
              "inputs": {
                "type": "object",
                "properties": {
                  "first_frame": { "const": "none" },
                  "last_frame": { "const": "none" }
                }
              }
            }
          },
          "else": { "type": "object", "properties": { "duration": { "type": "object" } } }
        }
      ]
    }
  }
}