{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Scene Description Training Entry",
  "description": "Schema for lyrics-to-visual scene description training data. Catches missing fields, wrong types, empty values, and unexpected fields.",
  "type": "object",
  "required": ["song", "beat", "lyric_line", "scene"],
  "properties": {
    "song": {
      "type": "string",
      "minLength": 1,
      "description": "Song title"
    },
    "artist": {
      "type": "string",
      "minLength": 1,
      "description": "Artist or group name (missing in some files — flagged as warning)"
    },
    "genre": {
      "type": "string",
      "minLength": 1,
      "description": "Musical genre"
    },
    "bpm": {
      "type": "number",
      "minimum": 1,
      "description": "Beats per minute"
    },
    "beat": {
      "type": "integer",
      "minimum": 1,
      "description": "Beat number within the song"
    },
    "timestamp": {
      "type": "string",
      "pattern": "^[0-9]+:[0-5][0-9]$",
      "description": "Timestamp in M:SS or MM:SS format"
    },
    "duration_seconds": {
      "type": "number",
      "minimum": 0,
      "description": "Duration in seconds"
    },
    "duration": {
      "type": "string",
      "minLength": 1,
      "description": "Duration as string (e.g. '30s')"
    },
    "mood_arc": {
      "oneOf": [
        { "type": "string", "minLength": 1 },
        { "type": "array", "items": { "type": "string" } }
      ],
      "description": "Optional mood progression arc"
    },
    "lyric_line": {
      "type": "string",
      "minLength": 1,
      "description": "Lyric line(s) for this beat"
    },
    "scene": {
      "type": "object",
      "required": ["mood", "colors", "composition", "description"],
      "properties": {
        "mood": {
          "type": "string",
          "minLength": 1,
          "description": "Emotional mood of the scene"
        },
        "colors": {
          "type": "array",
          "items": { "type": "string", "minLength": 1 },
          "minItems": 1,
          "description": "Visual color palette"
        },
        "composition": {
          "type": "string",
          "minLength": 1,
          "description": "Shot composition description"
        },
        "camera": {
          "type": "string",
          "minLength": 1,
          "description": "Camera movement or position"
        },
        "camera_movement": {
          "type": "string",
          "minLength": 1,
          "description": "Camera movement (alternate field name)"
        },
        "description": {
          "type": "string",
          "minLength": 10,
          "description": "Full visual scene description"
        }
      },
      "additionalProperties": false
    }
  },
  "additionalProperties": false
}