use std::{error::Error, fmt};

#[derive(Clone, Debug, PartialEq, Eq)]
pub enum EditorAgentError {
    MissingConversationId,
    MissingProjectId,
    MissingOwnerUserId,
    MissingMessageId,
    EmptyMessage,
    TooManyAttachments,
    InvalidAttachmentReference,
    ConversationDeleted,
    NotConversationOwner,
}

impl fmt::Display for EditorAgentError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let message = match self {
            Self::MissingConversationId => "editor agent conversation_id 缺失",
            Self::MissingProjectId => "editor agent project_id 缺失",
            Self::MissingOwnerUserId => "editor agent owner_user_id 缺失",
            Self::MissingMessageId => "editor agent message_id 缺失",
            Self::EmptyMessage => "消息文本不能为空",
            Self::TooManyAttachments => "单条消息附件超过上限",
            Self::InvalidAttachmentReference => "附件引用缺少资源标识",
            Self::ConversationDeleted => "会话已删除",
            Self::NotConversationOwner => "当前用户不是会话拥有者",
        };
        write!(f, "{message}")
    }
}

impl Error for EditorAgentError {}