class SuccessMessage:
    FETCHED = "Data fetched successfully."
    CREATED = "Resource created successfully."
    UPDATED = "Resource updated successfully."
    DELETED = "Resource deleted successfully."

    SAVED = "Data saved successfully."
    IMPORTED = "Data imported successfully."
    EXPORTED = "Data exported successfully."
    UPLOADED = "File uploaded successfully."
    DOWNLOADED = "File downloaded successfully."

    LOGIN = "Login successful."
    LOGOUT = "Logout successful."
    PASSWORD_CHANGED = "Password changed successfully."
    PASSWORD_RESET = "Password reset successfully."

    EMAIL_SENT = "Email sent successfully."
    STATUS_UPDATED = "Status updated successfully."


class ErrorMessage:
    INVALID_REQUEST = "Invalid request."
    INVALID_DATA = "Invalid data provided."
    VALIDATION_FAILED = "Validation failed."

    UNAUTHORIZED = "Unauthorized access."
    FORBIDDEN = "Access denied."
    NOT_FOUND = "Resource not found."
    METHOD_NOT_ALLOWED = "Method not allowed."

    DUPLICATE_ENTRY = "Duplicate record found."
    RECORD_EXISTS = "Record already exists."
    RECORD_NOT_FOUND = "Record does not exist."

    FILE_NOT_FOUND = "File not found."
    FILE_UPLOAD_FAILED = "File upload failed."
    FILE_IMPORT_FAILED = "File import failed."

    DATABASE_ERROR = "Database operation failed."
    INTERNAL_SERVER_ERROR = "Internal server error."
    SERVICE_UNAVAILABLE = "Service temporarily unavailable."

    LOGIN_FAILED = "Invalid username or password."
    SESSION_EXPIRED = "Session expired. Please login again."

    PASSWORD_MISMATCH = "Passwords do not match."
    INVALID_TOKEN = "Invalid or expired token."


class WarningMessage:
    NO_DATA_FOUND = "No data found."
    ALREADY_EXISTS = "Record already exists."
    UNSAVED_CHANGES = "You have unsaved changes."
    DELETE_CONFIRMATION = "Are you sure you want to delete the selected record(s)?"
    INVALID_FILTER = "No records match the selected filters."


class InfoMessage:
    PROCESSING = "Request is being processed."
    LOADING = "Loading data..."
    SAVING = "Saving data..."
    DELETING = "Deleting record..."
    IMPORTING = "Importing data..."
    EXPORTING = "Preparing export..."