{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "USEFS Schema",
  "description": "USEFS (The Universal Schedule Sheet Exchange Format Schema) 文件格式标准",
  "type": "object",
  "properties": {
    "version": {
      "type": "integer",
      "description": "USEFS 文件版本号",
      "enum": [1]
    },
    "items": {
      "type": "array",
      "description": "日程项列表",
      "items": {
        "$ref": "#/definitions/item"
      }
    },
    "collections": {
      "type": "array",
      "description": "日程集合列表",
      "items": {
        "$ref": "#/definitions/collection"
      }
    }
  },
  "required": [
    "version"
  ],
  "definitions": {
    "item": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string",
          "description": "日程项名称"
        },
        "short_name": {
          "type": "string",
          "description": "日程项简称 (可选)"
        },
        "from_date": {
          "type": "string",
          "description": "开始日期，ISO 8601 格式 (YYYY-MM-DD)",
          "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
        },
        "from_time": {
          "type": "string",
          "description": "开始时间，HH:MM 格式",
          "pattern": "^\\d{2}:\\d{2}$"
        },
        "duration": {
          "type": "string",
          "description": "持续时间 (e.g., 2h, 30m) (可选)",
          "pattern": "^\\d+(\\.\\d+)?[smhd]$"
        },
        "enable": {
          "type": "string",
          "description": "启用规则 (e.g., 'every_day', 'Monday')"
        },
        "cycle": {
          "type": "string",
          "description": "循环规则 (e.g., 'every', 'odd')"
        },
        "importance": {
          "type": "integer",
          "description": "优先级"
        },
        "note": {
          "type": "string",
          "description": "日程项备注 (可选)"
        },
        "tags": {
          "type": "array",
          "description": "日程项标签 (可选)",
          "items": {
            "type": "string"
          }
        },
        "properties": {
          "type": "object",
          "description": "自定义属性 (可选)"
        }
      },
      "required": [
        "name",
        "from_date",
        "from_time",
        "enable",
        "cycle",
        "importance"
      ]
    },
    "collection": {
      "type": "object",
      "properties": {
        "collection_name": {
          "type": "string",
          "description": "集合名称"
        },
        "enable": {
          "type": "string",
          "description": "集合启用规则"
        },
        "cycle": {
          "type": "string",
          "description": "集合循环规则"
        },
        "importance": {
          "type": "integer",
          "description": "集合优先级"
        },
        "content": {
          "type": "array",
          "description": "集合中的日程项列表",
          "items": {
            "$ref": "#/definitions/collectionItem"
          }
        }
      },
      "required": [
        "collection_name",
        "enable",
        "cycle",
        "importance",
        "content"
      ]
    },
    "collectionItem": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string",
          "description": "日程项名称"
        },
        "short_name": {
          "type": "string",
          "description": "日程项简称 (可选)"
        },
        "from_time": {
          "type": "string",
          "description": "开始时间，HH:MM 格式",
          "pattern": "^\\d{2}:\\d{2}$"
        },
        "duration": {
          "type": "string",
          "description": "持续时间 (e.g., 2h, 30m) (可选)",
          "pattern": "^\\d+(\\.\\d+)?[smhd]$"
        },
        "note": {
          "type": "string",
          "description": "日程项备注 (可选)"
        },
        "tags": {
          "type": "array",
          "description": "日程项标签 (可选)",
          "items": {
            "type": "string"
          }
        },
        "properties": {
          "type": "object",
          "description": "自定义属性 (可选)"
        }
      },
      "required": [
        "name",
        "from_time",
        "duration"
      ]
    }
  }
}