{
  "openapi": "3.0.3",
  "info": {
    "title": "Products API",
    "version": "1.0.0",
    "description": "API для керування продуктами"
  },
  "paths": {
    "/products": {
      "get": {
        "summary": "Отримати всі продукти",
        "operationId": "getAllProducts",
        "responses": {
          "200": {
            "description": "Список продуктів",
            "content": {
              "application/json": {
                "schema": {
                  "type": "array",
                  "items": { "$ref": "#/components/schemas/Product" }
                }
              }
            }
          }
        }
      }
    },
    "/products/{id}": {
      "get": {
        "summary": "Отримати продукт за ID",
        "operationId": "getProductById",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": { "type": "integer" }
          }
        ],
        "responses": {
          "200": {
            "description": "Продукт",
            "content": {
              "application/json": {
                "schema": { "$ref": "#/components/schemas/Product" }
              }
            }
          },
          "404": {
            "description": "Продукт не знайдено"
          }
        }
      }
    },
    "/products/add": {
      "post": {
        "summary": "Додати новий продукт",
        "operationId": "addProduct",
        "requestBody": {
          "required": true,
          "content": {
            "application/x-www-form-urlencoded": {
              "schema": { "$ref": "#/components/schemas/ProductInput" }
            },
            "application/json": {
              "schema": { "$ref": "#/components/schemas/ProductInput" }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Продукт додано",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "message": { "type": "string" }
                  }
                }
              }
            }
          }
        }
      }
    },
    "/products/update/{id}": {
      "put": {
        "summary": "Оновити продукт повністю",
        "operationId": "updateProduct",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": { "type": "integer" }
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/x-www-form-urlencoded": {
              "schema": { "$ref": "#/components/schemas/ProductInput" }
            },
            "application/json": {
              "schema": { "$ref": "#/components/schemas/ProductInput" }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Продукт оновлено",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "message": { "type": "string" }
                  }
                }
              }
            }
          }
        }
      },
      "patch": {
        "summary": "Частково оновити продукт",
        "operationId": "patchProduct",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": { "type": "integer" }
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/x-www-form-urlencoded": {
              "schema": { "$ref": "#/components/schemas/ProductPatchInput" }
            },
            "application/json": {
              "schema": { "$ref": "#/components/schemas/ProductPatchInput" }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Продукт частково оновлено",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "message": { "type": "string" }
                  }
                }
              }
            }
          }
        }
      }
    },
    "/products/delete/{id}": {
      "delete": {
        "summary": "Видалити продукт",
        "operationId": "deleteProduct",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": { "type": "integer" }
          }
        ],
        "responses": {
          "200": {
            "description": "Продукт видалено",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "message": { "type": "string" }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "Product": {
        "type": "object",
        "properties": {
          "id": { "type": "integer" },
          "title": { "type": "string" },
          "price": { "type": "number", "format": "float" },
          "amount": { "type": "integer" },
          "in_stock": { "type": "integer", "enum": [0, 1] }
        }
      },
      "ProductInput": {
        "type": "object",
        "required": ["title", "price", "amount"],
        "properties": {
          "title": { "type": "string" },
          "price": { "type": "number", "format": "float" },
          "amount": { "type": "integer" }
        }
      },
      "ProductPatchInput": {
        "type": "object",
        "properties": {
          "title": { "type": "string" },
          "price": { "type": "number", "format": "float" },
          "amount": { "type": "integer" }
        }
      }
    }
  }
}