use axum::extract::{FromRef, Path, Query, State};
use axum::response::IntoResponse;
use axum::Extension;
use serde::Deserialize;
use utoipa::IntoParams;
use uuid::Uuid;

use erp_core::error::AppError;
use erp_core::rbac::require_permission;
use erp_core::types::{ApiResponse, PaginatedResponse, TenantContext};

use crate::dto::alert_dto::AcknowledgeAlertRequest;
use crate::service::alert_service;
use crate::state::HealthState;

#[derive(Debug, Deserialize, IntoParams)]
pub struct AlertListQuery {
    pub patient_id: Option<Uuid>,
    pub doctor_id: Option<Uuid>,
    pub status: Option<String>,
    pub page: Option<u64>,
    pub page_size: Option<u64>,
}

pub async fn list_alerts<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Query(query): Query<AlertListQuery>,
) -> Result<impl IntoResponse, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.alerts.list")?;
    let page = query.page.unwrap_or(1);
    let page_size = query.page_size.unwrap_or(20);

    let (items, total) = alert_service::list_alerts(
        &state, ctx.tenant_id, query.patient_id, query.doctor_id, query.status.as_deref(),
        page, page_size,
    ).await?;

    Ok(axum::Json(ApiResponse::ok(PaginatedResponse {
        data: items,
        total,
        page,
        page_size,
        total_pages: total.div_ceil(page_size.max(1)),
    })))
}

pub async fn acknowledge<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(id): Path<Uuid>,
    axum::Json(body): axum::Json<AcknowledgeAlertRequest>,
) -> Result<impl IntoResponse, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.alerts.manage")?;
    let alert = alert_service::acknowledge_alert(
        &state, ctx.tenant_id, id, ctx.user_id, body.version,
    ).await?;
    Ok(axum::Json(ApiResponse::ok(alert)))
}

pub async fn dismiss<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(id): Path<Uuid>,
    axum::Json(body): axum::Json<AcknowledgeAlertRequest>,
) -> Result<impl IntoResponse, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.alerts.manage")?;
    let alert = alert_service::dismiss_alert(
        &state, ctx.tenant_id, id, ctx.user_id, body.version,
    ).await?;
    Ok(axum::Json(ApiResponse::ok(alert)))
}

pub async fn resolve<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(id): Path<Uuid>,
    axum::Json(body): axum::Json<AcknowledgeAlertRequest>,
) -> Result<impl IntoResponse, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.alerts.manage")?;
    let alert = alert_service::resolve_alert(
        &state, ctx.tenant_id, id, body.version,
    ).await?;
    Ok(axum::Json(ApiResponse::ok(alert)))
}