{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.com/schemas/leonardo-ai/leonardo-ai-generation-schema.json",
  "title": "Leonardo.AI Generation",
  "description": "Schema for Leonardo.AI image generation request and response objects. Covers the POST /generations request body and the generation object returned by GET /generations/{id}.",
  "type": "object",
  "definitions": {
    "GenerationRequest": {
      "type": "object",
      "description": "Request body for POST /generations.",
      "required": ["prompt"],
      "properties": {
        "prompt": { "type": "string", "description": "Text prompt to generate from." },
        "negative_prompt": { "type": "string", "description": "Negative text prompt." },
        "modelId": { "type": "string", "description": "Platform model UUID. Use GET /platformModels to list." },
        "num_images": { "type": "integer", "minimum": 1, "maximum": 8, "description": "Number of images to generate." },
        "width": { "type": "integer", "description": "Output width in pixels." },
        "height": { "type": "integer", "description": "Output height in pixels." },
        "num_inference_steps": { "type": "integer", "minimum": 1, "maximum": 60, "description": "Diffusion steps." },
        "guidance_scale": { "type": "number", "description": "Classifier-free guidance scale." },
        "seed": { "type": "integer", "description": "Random seed for reproducibility." },
        "scheduler": { "type": "string", "description": "Sampler/scheduler name." },
        "presetStyle": { "type": "string", "description": "Style preset (e.g., DYNAMIC, CINEMATIC, VIBRANT)." },
        "photoReal": { "type": "boolean", "description": "Enable PhotoReal pipeline." },
        "photoRealVersion": { "type": "string", "enum": ["v1", "v2"], "description": "PhotoReal version." },
        "alchemy": { "type": "boolean", "description": "Enable Alchemy pipeline." },
        "promptMagic": { "type": "boolean", "description": "Enable Prompt Magic enhancement." },
        "transparency": { "type": "string", "enum": ["foreground_only", "disabled"], "description": "Transparent background output mode." },
        "public": { "type": "boolean", "description": "Make generation public in the Leonardo community." },
        "tiling": { "type": "boolean", "description": "Generate tileable textures." },
        "controlnets": {
          "type": "array",
          "description": "Optional ControlNet image guidance entries.",
          "items": { "$ref": "#/definitions/ControlNet" }
        },
        "elements": {
          "type": "array",
          "description": "Optional Custom Element references to apply.",
          "items": { "$ref": "#/definitions/ElementRef" }
        },
        "webhookCallbackUrl": { "type": "string", "format": "uri", "description": "URL to POST job completion events to." }
      }
    },
    "ControlNet": {
      "type": "object",
      "properties": {
        "initImageId": { "type": "string", "format": "uuid" },
        "initImageType": { "type": "string", "enum": ["UPLOADED", "GENERATED"] },
        "preprocessorId": { "type": "integer" },
        "weight": { "type": "number" },
        "strengthType": { "type": "string", "enum": ["Low", "Mid", "High", "Max"] }
      }
    },
    "ElementRef": {
      "type": "object",
      "properties": {
        "akUUID": { "type": "string", "format": "uuid" },
        "weight": { "type": "number" }
      }
    },
    "GenerationResponse": {
      "type": "object",
      "description": "Response from POST /generations (job acknowledgement).",
      "properties": {
        "sdGenerationJob": {
          "type": "object",
          "properties": {
            "generationId": { "type": "string", "format": "uuid" },
            "apiCreditCost": { "type": "number", "description": "USD cost deducted from balance." }
          }
        }
      }
    },
    "Generation": {
      "type": "object",
      "description": "Generation object returned by GET /generations/{id}.",
      "properties": {
        "id": { "type": "string", "format": "uuid" },
        "status": { "type": "string", "enum": ["PENDING", "COMPLETE", "FAILED"] },
        "createdAt": { "type": "string", "format": "date-time" },
        "modelId": { "type": "string" },
        "prompt": { "type": "string" },
        "negativePrompt": { "type": "string" },
        "imageHeight": { "type": "integer" },
        "imageWidth": { "type": "integer" },
        "generated_images": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "id": { "type": "string", "format": "uuid" },
              "url": { "type": "string", "format": "uri" },
              "nsfw": { "type": "boolean" },
              "likeCount": { "type": "integer" }
            }
          }
        }
      }
    }
  }
}