openapi: 3.0.0
info:
  title: Todo CRUD API
  version: 1.0.0
servers:
  - url: https://api.example.com/v1
paths:
  /todos:
    get:
      summary: Get all todos
      responses:
        '200':
          description: A list of todos
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Todo'
    post:
      summary: Create a new todo
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TodoCreate'
      responses:
        '201':
          description: Todo created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Todo'
  /todos/{todoId}:
    get:
      summary: Get a todo by ID
      parameters:
        - name: todoId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Todo details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Todo'
        '404':
          description: Todo not found
    put:
      summary: Update a todo by ID
      parameters:
        - name: todoId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TodoUpdate'
      responses:
        '200':
          description: Todo updated
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Todo'
        '404':
          description: Todo not found
    delete:
      summary: Delete a todo by ID
      parameters:
        - name: todoId
          in: path
          required: true
          schema:
            type: string
      responses:
        '204':
          description: Todo deleted successfully
        '404':
          description: Todo not found

components:
  schemas:
    Todo:
      type: object
      properties:
        id:
          type: string
          example: "1"
        title:
          type: string
          example: "Buy groceries"
        description:
          type: string
          example: "Milk, Bread, Eggs"
        completed:
          type: boolean
          example: false
      required:
        - id
        - title
        - completed
    TodoCreate:
      type: object
      properties:
        title:
          type: string
          example: "Buy groceries"
        description:
          type: string
          example: "Milk, Bread, Eggs"
      required:
        - title
    TodoUpdate:
      type: object
      properties:
        title:
          type: string
          example: "Buy more groceries"
        description:
          type: string
          example: "Milk, Bread, Eggs, Cheese"
        completed:
          type: boolean
          example: true