openapi: 3.0.0
info:
  title: Project Management API
  description: An API for Managing Internal tools
  version: 1.0.0
servers:
  - url: /api/v1
security:
  - JWTAuth: []
    
components:
  securitySchemes:
    JWTAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
  schemas:
    ProjectInfo:
      type: object
      properties:
        id:
          type: integer
          format: int64
        name:
          type: string
    GetAllProjectsDTO:
      type: array
      items:
        $ref: "#/components/schemas/ProjectInfo"
    CreateProjectDTO:
      type: object
      properties:
        name:
          type: string
        goal:
          type: string
        customerId:
          type: integer
          format: int64
        administratorId:
          type: integer
          format: int64
        start:
          type: string
          format: date-time
        plannedEnd:
          type: string
          format: date-time
    CreatedProjectDTO:
      type: object
      properties:
        id:
          type: integer
          format: int64
        name:
          type: string
        goal:
          type: string
        customerId:
          type: integer
          format: int64
        administratorId:
          type: integer
          format: int64
        start:
          type: string
          format: date-time
        plannedEnd:
          type: string
          format: date-time
    AddEmployeeDTO:
      type: object
      properties:
        employeeId:
          type: integer
          format: int64
        qualificationId:
          type: integer
          format: int64
    EmployeeDTO:
      type: object
      properties:
        id:
          type: integer
          format: int64
        lastName:
          type: string
        firstName:
          type: string
        street:
          type: string
        postcode:
          maxLength: 5
          minLength: 5
          type: string
        city:
          type: string
        phone:
          type: string
        skillSet:
          type: array
          items:
            $ref: '#/components/schemas/QualificationDTO'
    QualificationDTO:
      type: object
      properties:
        skill:
          type: string
        id:
          type: integer
          format: int64
    GetEmployeesByProjectDTO:
      type: object
      properties:
        employees:
          type: array
          items:
            $ref: "#/components/schemas/EmployeeDTO"
  responses:
    Ok:
      description: "OK"
    Unauthorized:
      description: "Unauthorized"
    NotFound:
      description: "Not Found"
      content:
        text/plain:
          schema:
            type: string
    Conflict:
      description: "Conflict"
      content:
        text/plain:
          schema:
            type: string
    UnprocessableContent:
      description: "Unprocessable Content"
      content:
        text/plain:
          schema:
            type: string
    InternalError:
      description: "Internal Server Error"
      content:
        text/plain:
          schema:
            type: string
    ServiceUnavailable:
      description: "Service Unavailable"
      content:
        text/plain:
          schema:
            type: string
paths:
  /project:
    get:
      operationId: "getAllProjects"
      description: "Get a List of all Projects"
      responses:
        200:
          description: "Returns a List of all Projects"
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/GetAllProjectsDTO"
        401:
          $ref: "#/components/responses/Unauthorized"
        500:
          $ref: "#/components/responses/InternalError"
    post:
      operationId: "CreateProject"
      description: "Creates a new Project"
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/CreateProjectDTO"
      responses:
        201:
          description: "Project created successfully"
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/CreatedProjectDTO"
        401:
          $ref: "#/components/responses/Unauthorized"
        404:
          $ref: "#/components/responses/NotFound"
        409:
          $ref: "#/components/responses/Conflict"
        422:
          $ref: "#/components/responses/UnprocessableContent"
        500:
          $ref: "#/components/responses/InternalError"
        503:
          $ref: "#/components/responses/ServiceUnavailable"
  
  
  /project/{id}:
    post:
      operationId: "addEmployee"
      description: "Adds an employee to a specific Project"
      parameters:
        - in: path
          name: id
          schema:
            type: integer
            format: int64
          required: true
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/AddEmployeeDTO"
      responses:
        204:
          description: "Employee successfully added to the specific Project"
        401:
          $ref: "#/components/responses/Unauthorized"
        404:
          $ref: "#/components/responses/NotFound"
        409:
          $ref: "#/components/responses/Conflict"
        422:
          $ref: "#/components/responses/UnprocessableContent"
        500:
          $ref: "#/components/responses/InternalError"
        503:
          $ref: "#/components/responses/ServiceUnavailable"

    delete:
      operationId: "deleteProject"
      description: "Delete a specific Project"
      parameters:
        - in: path
          name: id
          schema:
            type: integer
            format: int64
          required: true
      responses:
        204:
          description: "Deletes a specific Project"
        401:
          $ref: "#/components/responses/Unauthorized"
        404:
          description: "Project not found"
          content:
            text/plain:
              schema:
                type: string
        500:
          $ref: "#/components/responses/InternalError"

  /project/{id}/employee/{employeeId}:
    delete:
      operationId: "removeEmployeeFromProject"
      description: "Removes an employee from a Project"
      parameters:
        - in: path
          name: id
          schema:
            type: integer
            format: int64
          required: true
        - in: path
          name: employeeId
          schema:
            type: integer
            format: int64
          required: true
      responses:
        204:
          description: "Deletes the employee from the Project"
        401:
          $ref: "#/components/responses/Unauthorized"
        404:
          $ref: "#/components/responses/NotFound"
        409:
          $ref: "#/components/responses/Conflict"
        500:
          $ref: "#/components/responses/InternalError"
        503:
          $ref: "#/components/responses/ServiceUnavailable"

  /project/{id}/employees:
    get:
      description: "getAllEmployees"
      operationId: "Get a List of all Employees from a specific Project"
      parameters:
        - in: path
          name: id
          schema:
            type: integer
            format: int64
          required: true
      responses:
        200:
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/GetEmployeesByProjectDTO"
          description: 'Get a List of all Employees from a specific Project '
        404:
          $ref: '#/components/responses/NotFound'
        500:
          $ref: "#/components/responses/InternalError"