use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SessionSummary {
    pub session_id: String,
    pub title: String,
    pub channel_name: String,
    pub chat_id: String,
    pub message_count: i64,
    pub last_active_at: i64,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub archived_at: Option<i64>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SlashCommandInfo {
    pub name: String,
    pub description: String,
    pub aliases: Vec<String>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(tag = "type")]
pub enum WsInbound {
    #[serde(rename = "user_input")]
    UserInput {
        content: String,
        #[serde(default, skip_serializing_if = "Option::is_none")]
        channel: Option<String>,
        #[serde(default, skip_serializing_if = "Option::is_none")]
        chat_id: Option<String>,
        #[serde(default, skip_serializing_if = "Option::is_none")]
        sender_id: Option<String>,
    },
    #[serde(rename = "clear_history")]
    ClearHistory {
        #[serde(default, skip_serializing_if = "Option::is_none")]
        chat_id: Option<String>,
        #[serde(default, skip_serializing_if = "Option::is_none")]
        session_id: Option<String>,
    },
    #[serde(rename = "create_session")]
    CreateSession {
        #[serde(default, skip_serializing_if = "Option::is_none")]
        title: Option<String>,
    },
    #[serde(rename = "list_sessions")]
    ListSessions {
        #[serde(default)]
        include_archived: bool,
    },
    #[serde(rename = "load_session")]
    LoadSession { session_id: String },
    #[serde(rename = "rename_session")]
    RenameSession {
        #[serde(default, skip_serializing_if = "Option::is_none")]
        session_id: Option<String>,
        title: String,
    },
    #[serde(rename = "archive_session")]
    ArchiveSession {
        #[serde(default, skip_serializing_if = "Option::is_none")]
        session_id: Option<String>,
    },
    #[serde(rename = "delete_session")]
    DeleteSession {
        #[serde(default, skip_serializing_if = "Option::is_none")]
        session_id: Option<String>,
    },
    #[serde(rename = "get_slash_commands")]
    GetSlashCommands,
    #[serde(rename = "ping")]
    Ping,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(tag = "type")]
pub enum WsOutbound {
    #[serde(rename = "assistant_response")]
    AssistantResponse {
        id: String,
        content: String,
        role: String,
    },
    #[serde(rename = "error")]
    Error { code: String, message: String },
    #[serde(rename = "session_established")]
    SessionEstablished { session_id: String },
    #[serde(rename = "session_created")]
    SessionCreated { session_id: String, title: String },
    #[serde(rename = "session_list")]
    SessionList {
        sessions: Vec<SessionSummary>,
        #[serde(default, skip_serializing_if = "Option::is_none")]
        current_session_id: Option<String>,
    },
    #[serde(rename = "session_loaded")]
    SessionLoaded {
        session_id: String,
        title: String,
        message_count: i64,
    },
    #[serde(rename = "session_renamed")]
    SessionRenamed { session_id: String, title: String },
    #[serde(rename = "session_archived")]
    SessionArchived { session_id: String },
    #[serde(rename = "session_deleted")]
    SessionDeleted { session_id: String },
    #[serde(rename = "history_cleared")]
    HistoryCleared { session_id: String },
    #[serde(rename = "slash_commands_list")]
    SlashCommandsList { commands: Vec<SlashCommandInfo> },
    #[serde(rename = "pong")]
    Pong,
    #[serde(rename = "command_executed")]
    CommandExecuted { message: String },
    #[serde(rename = "system_notification")]
    SystemNotification { content: String },
}

pub fn parse_inbound(raw: &str) -> Result<WsInbound, serde_json::Error> {
    serde_json::from_str(raw)
}

pub fn serialize_inbound(msg: &WsInbound) -> Result<String, serde_json::Error> {
    serde_json::to_string(msg)
}

pub fn serialize_outbound(msg: &WsOutbound) -> Result<String, serde_json::Error> {
    serde_json::to_string(msg)
}