use axum::Extension;
use axum::extract::{FromRef, Json, Path, Query, State};
use erp_core::error::AppError;
use erp_core::rbac::require_permission;
use erp_core::types::{ApiResponse, PaginatedResponse, TenantContext};

use crate::dto::medication_reminder_dto::{
    CreateMedicationReminderReq, MedicationReminderResp, UpdateMedicationReminderReq,
};
use crate::service::medication_reminder_service;
use crate::state::HealthState;

#[derive(Debug, serde::Deserialize)]
pub struct PaginationParams {
    pub page: Option<u64>,
    pub page_size: Option<u64>,
}

pub async fn list_reminders<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(patient_id): Path<uuid::Uuid>,
    Query(params): Query<PaginationParams>,
) -> Result<Json<ApiResponse<PaginatedResponse<MedicationReminderResp>>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.medication-reminders.list")?;
    let page = params.page.unwrap_or(1);
    let page_size = params.page_size.unwrap_or(20);
    let result = medication_reminder_service::list_reminders(
        &state,
        ctx.tenant_id,
        patient_id,
        page,
        page_size,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn create_reminder<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    mut req: Json<CreateMedicationReminderReq>,
) -> Result<Json<ApiResponse<MedicationReminderResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.medication-reminders.manage")?;
    req.sanitize();
    let result = medication_reminder_service::create_reminder(
        &state,
        ctx.tenant_id,
        Some(ctx.user_id),
        req.0,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

#[derive(Debug, serde::Deserialize, utoipa::ToSchema)]
pub struct UpdateReminderWithVersion {
    #[serde(flatten)]
    pub data: UpdateMedicationReminderReq,
    pub version: i32,
}

pub async fn update_reminder<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(id): Path<uuid::Uuid>,
    Json(req): Json<UpdateReminderWithVersion>,
) -> Result<Json<ApiResponse<MedicationReminderResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.medication-reminders.manage")?;
    let mut data = req.data;
    data.sanitize();
    let result = medication_reminder_service::update_reminder(
        &state,
        ctx.tenant_id,
        id,
        Some(ctx.user_id),
        req.version,
        data,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

#[derive(Debug, serde::Deserialize)]
pub struct DeleteWithVersion {
    pub version: i32,
}

pub async fn delete_reminder<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(id): Path<uuid::Uuid>,
    Json(req): Json<DeleteWithVersion>,
) -> Result<Json<ApiResponse<()>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.medication-reminders.manage")?;
    medication_reminder_service::delete_reminder(
        &state,
        ctx.tenant_id,
        id,
        Some(ctx.user_id),
        req.version,
    )
    .await?;
    Ok(Json(ApiResponse::ok(())))
}