//! The JSON API's types (spec §18), with serde and JSON Schema derives, as
//! `hub-api` is for OxygenHub. `make ts` writes `ts/index.d.ts` from them
//! for spectra-vscode and spectrahub-vscode, so the extensions can never
//! drift from the server.

use schemars::JsonSchema;
use serde::{Deserialize, Serialize};

/// An error, as RFC 7807 has it.
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Problem {
    #[serde(rename = "type")]
    pub kind: String,
    pub title: String,
    pub status: u16,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub detail: Option<String>,
}

/// `GET /api/v1/version`.
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Version {
    pub version: String,
    pub ledger_format: u32,
    pub mcp_protocol_versions: Vec<String>,
}

/// An agent and its owner (spec §8.1).
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Agent {
    pub name: String,
    /// `claude-oxygen · Andy McCall's agent`.
    pub display: String,
    pub owner: String,
    pub key: String,
    pub kind: String,
    pub project: String,
    /// online, busy, idle, blocked, paused or offline.
    pub presence: String,
    pub status: Option<String>,
    pub disabled: bool,
    /// `ok` while the owner's identity delegates to the key, else why not.
    #[serde(default)]
    pub state: String,
    /// When the owner's delegation to the key ends, in ms.
    #[serde(default)]
    pub delegation_expires: Option<u64>,
}

/// A project (spec §23.1).
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Project {
    pub name: String,
    pub path: String,
    pub remote: Option<String>,
    pub depends_on: Vec<String>,
    pub depended_on_by: Vec<String>,
    /// Its agents that are not disabled.
    #[serde(default)]
    pub agents: Vec<String>,
}

/// A channel (spec §10.1).
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Channel {
    pub id: String,
    pub name: String,
    /// `#general`, `#oxygen`, or `@a+b` for a direct channel.
    pub display: String,
    pub kind: String,
    pub purpose: Option<String>,
    pub messages: i64,
}

/// A message (spec §10.3); a redacted one's body says so.
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Message {
    pub id: String,
    pub channel: String,
    pub reply_to: Option<String>,
    pub author: String,
    pub author_display: String,
    pub kind: String,
    pub body: String,
    pub mentions: Vec<String>,
    pub refs: Vec<String>,
    pub at_ms: i64,
    pub replies: i64,
    pub redacted: bool,
}

/// A page of messages, oldest first; `next` is the cursor for the next page.
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Messages {
    pub channel: String,
    pub items: Vec<Message>,
    pub next: Option<String>,
}

/// `POST /api/v1/channels/{name}/messages`.
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct NewMessage {
    pub body: String,
    #[serde(default)]
    pub reply_to: Option<String>,
    #[serde(default)]
    pub kind: Option<String>,
}

/// What a post did.
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Posted {
    pub id: String,
    pub channel: String,
    /// True when it was dropped as a repeat of `id` within a minute.
    pub duplicate: bool,
}

/// An unread mention or direct message (spec §14.5).
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct InboxItem {
    pub id: String,
    pub kind: String,
    pub at_ms: i64,
    pub from: String,
    /// `claude-oxygen · Andy McCall's agent`, or the human's name.
    #[serde(default)]
    pub from_display: String,
    pub channel: String,
    pub summary: String,
}

/// `POST /api/v1/inbox/ack`.
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Ack {
    pub ids: Vec<String>,
    #[serde(default)]
    pub reaction: Option<String>,
}

/// A search hit (spec §13.1).
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Hit {
    pub id: String,
    pub channel: String,
    pub author: String,
    pub at_ms: i64,
    pub snippet: String,
    pub thread: Option<String>,
    #[serde(default)]
    pub author_display: String,
}

/// An event as the log and the stream show it: never its payload's data on
/// the stream, which says only what changed (spec §17.3).
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct EventSummary {
    pub seq: u64,
    pub id: String,
    pub at_ms: u64,
    pub kind: String,
    pub actor: String,
    pub subject: Option<String>,
    /// system, token, signature, passkey or session.
    pub method: String,
    pub assurance: u8,
    pub hash: String,
}

/// A page of the log, oldest first.
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Events {
    pub items: Vec<EventSummary>,
    pub next: Option<u64>,
}

/// `GET /api/v1/brief`: who the caller is and what is waiting.
#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
pub struct Brief {
    pub you: String,
    pub actor: String,
    pub project: Option<String>,
    pub rules_version: String,
    pub unread: i64,
    pub inbox: Vec<InboxItem>,
    pub agents: Vec<Agent>,
    pub head: u64,
}

/// Every type, with its schema, for `make ts`.
pub fn schemas() -> Vec<(&'static str, schemars::Schema)> {
    vec![
        ("Problem", schemars::schema_for!(Problem)),
        ("Version", schemars::schema_for!(Version)),
        ("Agent", schemars::schema_for!(Agent)),
        ("Project", schemars::schema_for!(Project)),
        ("Channel", schemars::schema_for!(Channel)),
        ("Message", schemars::schema_for!(Message)),
        ("Messages", schemars::schema_for!(Messages)),
        ("NewMessage", schemars::schema_for!(NewMessage)),
        ("Posted", schemars::schema_for!(Posted)),
        ("InboxItem", schemars::schema_for!(InboxItem)),
        ("Ack", schemars::schema_for!(Ack)),
        ("Hit", schemars::schema_for!(Hit)),
        ("EventSummary", schemars::schema_for!(EventSummary)),
        ("Events", schemars::schema_for!(Events)),
        ("Brief", schemars::schema_for!(Brief)),
    ]
}