{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://developers.facebook.com/schemas/whatsapp/message.json",
  "title": "WhatsApp Message",
  "description": "Schema for outbound WhatsApp messages sent via the Cloud API POST /{phone-number-id}/messages endpoint. Covers all message types including text, media, location, contacts, interactive, template, and reaction messages.",
  "type": "object",
  "required": ["messaging_product", "to", "type"],
  "properties": {
    "messaging_product": {
      "type": "string",
      "const": "whatsapp",
      "description": "Must be 'whatsapp'"
    },
    "recipient_type": {
      "type": "string",
      "default": "individual",
      "description": "Recipient type, currently only 'individual' is supported"
    },
    "to": {
      "type": "string",
      "description": "Recipient phone number in E.164 format without the leading +",
      "pattern": "^[1-9]\\d{1,14}$"
    },
    "type": {
      "type": "string",
      "enum": ["text", "image", "video", "audio", "document", "sticker", "location", "contacts", "interactive", "template", "reaction"],
      "description": "Message type"
    },
    "context": {
      "$ref": "#/$defs/Context"
    },
    "biz_opaque_callback_data": {
      "type": "string",
      "description": "Arbitrary string for tracking, included in webhook delivery"
    },
    "text": {
      "$ref": "#/$defs/TextMessage"
    },
    "image": {
      "$ref": "#/$defs/MediaMessage"
    },
    "video": {
      "$ref": "#/$defs/MediaMessage"
    },
    "audio": {
      "$ref": "#/$defs/AudioMessage"
    },
    "document": {
      "$ref": "#/$defs/DocumentMessage"
    },
    "sticker": {
      "$ref": "#/$defs/StickerMessage"
    },
    "location": {
      "$ref": "#/$defs/LocationMessage"
    },
    "contacts": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/Contact"
      },
      "description": "Array of contact cards to send"
    },
    "interactive": {
      "$ref": "#/$defs/InteractiveMessage"
    },
    "template": {
      "$ref": "#/$defs/TemplateMessage"
    },
    "reaction": {
      "$ref": "#/$defs/ReactionMessage"
    }
  },
  "$defs": {
    "Context": {
      "type": "object",
      "description": "Context for reply messages",
      "required": ["message_id"],
      "properties": {
        "message_id": {
          "type": "string",
          "description": "ID of the message being replied to"
        }
      }
    },
    "TextMessage": {
      "type": "object",
      "required": ["body"],
      "properties": {
        "body": {
          "type": "string",
          "maxLength": 4096,
          "description": "Message text content"
        },
        "preview_url": {
          "type": "boolean",
          "default": false,
          "description": "Set true to render URL previews"
        }
      }
    },
    "MediaMessage": {
      "type": "object",
      "description": "Image or video message. Provide either id (for uploaded media) or link (for URL-hosted media), not both.",
      "properties": {
        "id": {
          "type": "string",
          "description": "Media ID from a previous upload"
        },
        "link": {
          "type": "string",
          "format": "uri",
          "description": "HTTPS URL of the media file"
        },
        "caption": {
          "type": "string",
          "maxLength": 1024,
          "description": "Caption text"
        }
      }
    },
    "AudioMessage": {
      "type": "object",
      "description": "Audio message. Supported formats: AAC, MP4, MPEG, AMR, OGG (OPUS). Max 16 MB.",
      "properties": {
        "id": {
          "type": "string",
          "description": "Media ID from a previous upload"
        },
        "link": {
          "type": "string",
          "format": "uri",
          "description": "HTTPS URL of the audio file"
        }
      }
    },
    "DocumentMessage": {
      "type": "object",
      "description": "Document message. Max 100 MB.",
      "properties": {
        "id": {
          "type": "string",
          "description": "Media ID from a previous upload"
        },
        "link": {
          "type": "string",
          "format": "uri",
          "description": "HTTPS URL of the document"
        },
        "caption": {
          "type": "string",
          "description": "Caption text"
        },
        "filename": {
          "type": "string",
          "description": "Filename to display to recipient"
        }
      }
    },
    "StickerMessage": {
      "type": "object",
      "description": "Sticker message. WebP format only. Max 100 KB (static), 500 KB (animated).",
      "properties": {
        "id": {
          "type": "string"
        },
        "link": {
          "type": "string",
          "format": "uri"
        }
      }
    },
    "LocationMessage": {
      "type": "object",
      "required": ["latitude", "longitude"],
      "properties": {
        "latitude": {
          "type": "number",
          "minimum": -90,
          "maximum": 90
        },
        "longitude": {
          "type": "number",
          "minimum": -180,
          "maximum": 180
        },
        "name": {
          "type": "string",
          "description": "Location name"
        },
        "address": {
          "type": "string",
          "description": "Location address"
        }
      }
    },
    "Contact": {
      "type": "object",
      "required": ["name"],
      "properties": {
        "name": {
          "type": "object",
          "required": ["formatted_name"],
          "properties": {
            "formatted_name": {
              "type": "string"
            },
            "first_name": {
              "type": "string"
            },
            "last_name": {
              "type": "string"
            },
            "middle_name": {
              "type": "string"
            },
            "prefix": {
              "type": "string"
            },
            "suffix": {
              "type": "string"
            }
          }
        },
        "addresses": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "street": { "type": "string" },
              "city": { "type": "string" },
              "state": { "type": "string" },
              "zip": { "type": "string" },
              "country": { "type": "string" },
              "country_code": { "type": "string" },
              "type": {
                "type": "string",
                "enum": ["HOME", "WORK"]
              }
            }
          }
        },
        "birthday": {
          "type": "string",
          "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
          "description": "Birthday in YYYY-MM-DD format"
        },
        "emails": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "email": {
                "type": "string",
                "format": "email"
              },
              "type": {
                "type": "string",
                "enum": ["HOME", "WORK"]
              }
            }
          }
        },
        "org": {
          "type": "object",
          "properties": {
            "company": { "type": "string" },
            "department": { "type": "string" },
            "title": { "type": "string" }
          }
        },
        "phones": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "phone": { "type": "string" },
              "type": {
                "type": "string",
                "enum": ["CELL", "MAIN", "IPHONE", "HOME", "WORK"]
              },
              "wa_id": { "type": "string" }
            }
          }
        },
        "urls": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "url": {
                "type": "string",
                "format": "uri"
              },
              "type": {
                "type": "string",
                "enum": ["HOME", "WORK"]
              }
            }
          }
        }
      }
    },
    "InteractiveMessage": {
      "type": "object",
      "required": ["type", "action"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["button", "list", "product", "product_list", "cta_url", "location_request_message", "flow"]
        },
        "header": {
          "type": "object",
          "properties": {
            "type": {
              "type": "string",
              "enum": ["text", "image", "video", "document"]
            },
            "text": { "type": "string" }
          }
        },
        "body": {
          "type": "object",
          "required": ["text"],
          "properties": {
            "text": {
              "type": "string",
              "maxLength": 1024
            }
          }
        },
        "footer": {
          "type": "object",
          "properties": {
            "text": {
              "type": "string",
              "maxLength": 60
            }
          }
        },
        "action": {
          "type": "object",
          "description": "Action configuration varies by interactive type"
        }
      }
    },
    "TemplateMessage": {
      "type": "object",
      "required": ["name", "language"],
      "properties": {
        "name": {
          "type": "string",
          "description": "Template name"
        },
        "language": {
          "type": "object",
          "required": ["code"],
          "properties": {
            "code": {
              "type": "string",
              "description": "Language/locale code (e.g., en_US)"
            },
            "policy": {
              "type": "string",
              "default": "deterministic"
            }
          }
        },
        "components": {
          "type": "array",
          "items": {
            "type": "object",
            "required": ["type"],
            "properties": {
              "type": {
                "type": "string",
                "enum": ["header", "body", "button"]
              },
              "sub_type": {
                "type": "string",
                "enum": ["quick_reply", "url", "copy_code", "flow", "catalog"]
              },
              "index": {
                "type": "string"
              },
              "parameters": {
                "type": "array",
                "items": {
                  "type": "object",
                  "required": ["type"],
                  "properties": {
                    "type": {
                      "type": "string",
                      "enum": ["text", "image", "video", "document", "location", "currency", "date_time", "payload", "coupon_code"]
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "ReactionMessage": {
      "type": "object",
      "required": ["message_id", "emoji"],
      "properties": {
        "message_id": {
          "type": "string",
          "description": "ID of the message to react to"
        },
        "emoji": {
          "type": "string",
          "description": "Emoji character or empty string to remove reaction"
        }
      }
    }
  }
}