{
  "openapi": "3.0.0",
  "info": {
    "title": "User Management API",
    "version": "1.0.0",
    "description": "API for managing users, including registration, login, and profile management."
  },
  "servers": [
    {
      "url": "http://localhost:3000",
      "description": "Local server"
    }
  ],
  "paths": {
    "/users/signup": {
      "post": {
        "summary": "User Signup",
        "description": "Registers a new user.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "username": {
                    "type": "string"
                  },
                  "password": {
                    "type": "string"
                  },
                  "fullName": {
                    "type": "string"
                  },
                  "role": {
                    "type": "string",
                    "default": "user,admin,staff"
                  }
                },
                "required": ["username", "password", "fullName"]
              }
            }
          },
          "responses": {
            "201": {
              "description": "User registered successfully",
              "content": {
                "application/json": {
                  "schema": {
                    "type": "object",
                    "properties": {
                      "message": {
                        "type": "string"
                      },
                      "user": {
                        "type": "object",
                        "properties": {
                          "id": {
                            "type": "integer"
                          },
                          "username": {
                            "type": "string"
                          },
                          "fullName": {
                            "type": "string"
                          },
                          "role": {
                            "type": "string"
                          }
                        }
                      }
                    }
                  }
                }
              }
            },
            "400": {
              "description": "Error registering user",
              "content": {
                "application/json": {
                  "schema": {
                    "type": "object",
                    "properties": {
                      "message": {
                        "type": "string"
                      },
                      "error": {
                        "type": "string"
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "/users/login": {
      "post": {
        "summary": "User Login",
        "description": "Authenticates a user and returns a JWT token.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "username": {
                    "type": "string"
                  },
                  "password": {
                    "type": "string"
                  }
                },
                "required": ["username", "password"]
              }
            }
          },
          "responses": {
            "200": {
              "description": "Logged in successfully",
              "content": {
                "application/json": {
                  "schema": {
                    "type": "object",
                    "properties": {
                      "message": {
                        "type": "string"
                      },
                      "token": {
                        "type": "string"
                      }
                    }
                  }
                }
              }
            },
            "400": {
              "description": "Invalid username or password",
              "content": {
                "application/json": {
                  "schema": {
                    "type": "object",
                    "properties": {
                      "message": {
                        "type": "string"
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "/users/edit": {
      "put": {
        "summary": "Edit User",
        "description": "Updates user details.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "id": {
                    "type": "integer"
                  },
                  "username": {
                    "type": "string"
                  },
                  "password": {
                    "type": "string"
                  },
                  "fullName": {
                    "type": "string"
                  },
                  "role": {
                    "type": "string"
                  }
                },
                "required": ["id"]
              }
            }
          },
          "responses": {
            "200": {
              "description": "User updated successfully",
              "content": {
                "application/json": {
                  "schema": {
                    "type": "object",
                    "properties": {
                      "message": {
                        "type": "string"
                      },
                      "user": {
                        "type": "object",
                        "properties": {
                          "id": {
                            "type": "integer"
                          },
                          "username": {
                            "type": "string"
                          },
                          "fullName": {
                            "type": "string"
                          },
                          "role": {
                            "type": "string"
                          }
                        }
                      }
                    }
                  }
                }
              }
            },
            "400": {
              "description": "Error updating user",
              "content": {
                "application/json": {
                  "schema": {
                    "type": "object",
                    "properties": {
                      "message": {
                        "type": "string"
                      },
                      "error": {
                        "type": "string"
                      }
                    }
                  }
                }
              }
            },
            "404": {
              "description": "User not found",
              "content": {
                "application/json": {
                  "schema": {
                    "type": "object",
                    "properties": {
                      "message": {
                        "type": "string"
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "/users/logout": {
      "post": {
        "summary": "User Logout",
        "description": "Logs out the user by clearing the token.",
        "responses": {
          "200": {
            "description": "Logged out successfully",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "message": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          },
          "404": {
            "description": "User not found",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "message": {
                      "type": "string"
                    }
                  }
                }
              }
            },
            "500": {
              "description": "Server error",
              "content": {
                "application/json": {
                  "schema": {
                    "type": "object",
                    "properties": {
                      "message": {
                        "type": "string"
                      },
                      "error": {
                        "type": "string"
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}