//! HTTP-роуты ролевой админки. Named-guard'ы (`owner_guard`/`staff_guard`/
//! `partner_guard`) уже проверяют роль до входа в хендлер — сами хендлеры
//! читают текущего юзера только через `Extension<User>`.

use axum::{
    extract::{Extension, Path, State},
    http::StatusCode,
    middleware,
    routing::{get, patch, post},
    Json, Router,
};
use serde::Deserialize;
use serde_json::{json, Value};
use uuid::Uuid;

use crate::{
    api::ApiState,
    db::models::User,
    error::AppError,
    modules::auth::{auth_guard, owner_guard, partner_guard, staff_guard},
};

/// Любой залогиненный видит свою роль/права — нужно фронту, чтобы решить,
/// что показать и не пора ли редиректить на `/admin/login`.
pub fn router(state: ApiState) -> Router<ApiState> {
    Router::new()
        .route("/me", get(get_my_role))
        .route_layer(middleware::from_fn_with_state(state, auth_guard))
}

/// Только Owner/Moderator — гейт для Caddy `forward_auth` перед Grafana
/// (см. netrunner-data/observability/Caddyfile). Тело ответа не важно, важен
/// только статус: 200 — Caddy пускает дальше в Grafana, 401 — блокирует.
/// Бизнес-метрики (выручка, число юзеров) чувствительны — Support/Partner
/// сюда не допускаются, поэтому `staff_guard`, а не `support_access_guard`.
pub fn observability_router(state: ApiState) -> Router<ApiState> {
    Router::new()
        .route("/check", get(|| async { StatusCode::OK }))
        .route_layer(middleware::from_fn_with_state(state.clone(), staff_guard))
        .route_layer(middleware::from_fn_with_state(state, auth_guard))
}

/// Только Owner: создание модераторов/саппортов, выдача модераторам права
/// на управление нодами.
pub fn owner_router(state: ApiState) -> Router<ApiState> {
    Router::new()
        .route("/moderators", post(create_moderator))
        .route("/support", post(create_support))
        .route("/users/{id}/permissions", patch(set_permissions))
        .route_layer(middleware::from_fn_with_state(state.clone(), owner_guard))
        .route_layer(middleware::from_fn_with_state(state, auth_guard))
}

/// Owner + Moderator: создание партнёров, список staff-юзеров, заявки на вывод.
pub fn staff_router(state: ApiState) -> Router<ApiState> {
    Router::new()
        .route("/partners", post(create_partner))
        .route("/staff-users", get(list_staff))
        .route("/withdrawals", get(list_withdrawals))
        .route("/withdrawals/{id}", patch(update_withdrawal))
        .route_layer(middleware::from_fn_with_state(state.clone(), staff_guard))
        .route_layer(middleware::from_fn_with_state(state, auth_guard))
}

/// Только Partner: свой заработок и заявки на вывод.
pub fn partner_router(state: ApiState) -> Router<ApiState> {
    Router::new()
        .route("/withdrawals", post(request_withdrawal))
        .route("/earnings", get(get_my_earnings))
        .route_layer(middleware::from_fn_with_state(state.clone(), partner_guard))
        .route_layer(middleware::from_fn_with_state(state, auth_guard))
}

async fn get_my_role(Extension(user): Extension<User>) -> Json<Value> {
    Json(json!({
        "role": user.role,
        "can_manage_nodes": user.can_manage_nodes,
        "username": user.username,
        "partner_code": user.partner_code,
        "commission_percent": user.commission_percent,
    }))
}

#[derive(Deserialize)]
pub struct CreateModeratorPayload {
    pub username: String,
    pub password: String,
    pub can_manage_nodes: bool,
}

async fn create_moderator(
    State(state): State<ApiState>,
    Json(p): Json<CreateModeratorPayload>,
) -> Result<Json<Value>, AppError> {
    let user = state
        .staff_service
        .create_moderator(&p.username, &p.password, p.can_manage_nodes)
        .await?;
    Ok(Json(json!({
        "id": user.id,
        "username": user.username,
        "role": user.role,
        "can_manage_nodes": user.can_manage_nodes,
    })))
}

#[derive(Deserialize)]
pub struct CreateSupportPayload {
    pub username: String,
    pub password: String,
}

async fn create_support(
    State(state): State<ApiState>,
    Json(p): Json<CreateSupportPayload>,
) -> Result<Json<Value>, AppError> {
    let user = state
        .staff_service
        .create_support(&p.username, &p.password)
        .await?;
    Ok(Json(json!({
        "id": user.id,
        "username": user.username,
        "role": user.role,
    })))
}

#[derive(Deserialize)]
pub struct CreatePartnerPayload {
    pub username: String,
    pub password: String,
    pub commission_percent: rust_decimal::Decimal,
}

async fn create_partner(
    State(state): State<ApiState>,
    Json(p): Json<CreatePartnerPayload>,
) -> Result<Json<Value>, AppError> {
    let user = state
        .staff_service
        .create_partner(&p.username, &p.password, p.commission_percent)
        .await?;
    Ok(Json(json!({
        "id": user.id,
        "username": user.username,
        "partner_code": user.partner_code,
        "commission_percent": user.commission_percent,
    })))
}

#[derive(Deserialize)]
pub struct SetPermissionsPayload {
    pub can_manage_nodes: bool,
}

async fn set_permissions(
    State(state): State<ApiState>,
    Path(id): Path<Uuid>,
    Json(p): Json<SetPermissionsPayload>,
) -> Result<Json<Value>, AppError> {
    let user = state
        .staff_service
        .set_can_manage_nodes(id, p.can_manage_nodes)
        .await?
        .ok_or(AppError::UserNotFound)?;
    Ok(Json(json!({
        "id": user.id,
        "can_manage_nodes": user.can_manage_nodes,
    })))
}

async fn list_staff(State(state): State<ApiState>) -> Result<Json<Vec<Value>>, AppError> {
    let users = state.staff_service.list_staff().await?;
    Ok(Json(
        users
            .into_iter()
            .map(|u| {
                json!({
                    "id": u.id,
                    "username": u.username,
                    "role": u.role,
                    "can_manage_nodes": u.can_manage_nodes,
                    "commission_percent": u.commission_percent,
                    "partner_code": u.partner_code,
                })
            })
            .collect(),
    ))
}

async fn list_withdrawals(State(state): State<ApiState>) -> Result<Json<Value>, AppError> {
    let list = state.staff_service.list_all_withdrawals().await?;
    Ok(Json(json!(list)))
}

#[derive(Deserialize)]
pub struct UpdateWithdrawalPayload {
    pub status: String,
}

async fn update_withdrawal(
    Extension(user): Extension<User>,
    State(state): State<ApiState>,
    Path(id): Path<Uuid>,
    Json(p): Json<UpdateWithdrawalPayload>,
) -> Result<Json<Value>, AppError> {
    if !["approved", "rejected", "paid"].contains(&p.status.as_str()) {
        return Err(AppError::BusinessLogic("Недопустимый статус.".into()));
    }
    let req = state
        .staff_service
        .update_withdrawal(id, &p.status, user.id)
        .await?
        .ok_or_else(|| AppError::NotFound("Заявка не найдена".into()))?;
    Ok(Json(json!(req)))
}

async fn get_my_earnings(
    Extension(user): Extension<User>,
    State(state): State<ApiState>,
) -> Result<Json<Value>, AppError> {
    let earnings = state.staff_service.get_earnings(user.id).await?;
    let withdrawals = state
        .staff_service
        .list_withdrawals_for_partner(user.id)
        .await?;
    Ok(Json(json!({
        "earnings": earnings,
        "withdrawals": withdrawals,
        "partner_code": user.partner_code,
    })))
}

#[derive(Deserialize)]
pub struct RequestWithdrawalPayload {
    pub currency: String,
    pub amount: i64,
    pub note: Option<String>,
}

async fn request_withdrawal(
    Extension(user): Extension<User>,
    State(state): State<ApiState>,
    Json(p): Json<RequestWithdrawalPayload>,
) -> Result<Json<Value>, AppError> {
    let req = state
        .staff_service
        .request_withdrawal(user.id, &p.currency, p.amount, p.note.as_deref())
        .await?;
    Ok(Json(json!(req)))
}