syntax = "v1"
import "common.api"

type (
    ChatSession {
        Id            string       `json:"id"`
        Type          string       `json:"type"` // order, consultation
        OrderId       string       `json:"orderId,optional"`
        Participants  []SimpleUser `json:"participants"`
        LastMessage   string       `json:"lastMessage"`
        UnreadCount   int          `json:"unreadCount"`
    }

    ChatSessionListResp {
        Items []ChatSession `json:"items"`
        Meta  PageMeta      `json:"meta"`
    }

    ChatMessage {
        Id           string `json:"id"`
        SessionId    string `json:"sessionId"`
        SenderId     string `json:"senderId"`
        Type         string `json:"type"` // text, image, system
        Content      string `json:"content"`
        CreatedAt    string `json:"createdAt"`
    }

    ChatMessageListResp {
        Items []ChatMessage `json:"items"`
        Meta  PageMeta      `json:"meta"`
    }

    SendMessageReq {
        Type    string `json:"type"`
        Content string `json:"content"`
    }
)

@server(
    prefix: api/v1/chat
    group: chat
    jwt: Auth
)
service juwan-api {
    @doc "获取会话列表"
    @handler ListSessions
    get /sessions (PageReq) returns (ChatSessionListResp)

    @doc "获取会话详情"
    @handler GetSession
    get /sessions/:id (EmptyResp) returns (ChatSession)

    @doc "获取消息历史"
    @handler ListMessages
    get /sessions/:id/messages (PageReq) returns (ChatMessageListResp)

    @doc "发送消息"
    @handler SendMessage
    post /sessions/:id/messages (SendMessageReq) returns (ChatMessage)

    @doc "创建/获取订单会话"
    @handler EnsureOrderSession
    post /sessions/order (EmptyResp) returns (ChatSession)

    @doc "创建咨询会话"
    @handler CreateConsultation
    post /sessions/consultation (EmptyResp) returns (ChatSession)
}