use crate::error::AppError;
use crate::models::notifications::NotificationDelivery;
use crate::service::NotificationService;
use crate::session::Session;
use uuid::Uuid;

use super::util::clamp_limit_offset;

impl NotificationDelivery {
    pub async fn list_for_user(
        pool: &sqlx::PgPool,
        user_id: Uuid,
        limit: i64,
        offset: i64,
    ) -> Result<Vec<Self>, AppError> {
        sqlx::query_as::<_, NotificationDelivery>(
            "SELECT id, notification_id, user_id, channel, destination, status, provider, \
             provider_message_id, attempts, last_error, scheduled_at, sent_at, delivered_at, failed_at, created_at, updated_at \
             FROM notification_delivery WHERE user_id = $1 \
             ORDER BY created_at DESC LIMIT $2 OFFSET $3",
        )
        .bind(user_id)
        .bind(limit)
        .bind(offset)
        .fetch_all(pool)
        .await
        .map_err(AppError::Database)
    }

    pub async fn list_for_notification(
        pool: &sqlx::PgPool,
        notification_id: Uuid,
        user_id: Uuid,
        limit: i64,
        offset: i64,
    ) -> Result<Vec<Self>, AppError> {
        sqlx::query_as::<_, NotificationDelivery>(
            "SELECT d.id, d.notification_id, d.user_id, d.channel, d.destination, d.status, d.provider, \
             d.provider_message_id, d.attempts, d.last_error, d.scheduled_at, d.sent_at, d.delivered_at, d.failed_at, d.created_at, d.updated_at \
             FROM notification_delivery d \
             JOIN notification n ON d.notification_id = n.id \
             WHERE d.notification_id = $1 AND n.user_id = $2 \
             ORDER BY d.created_at DESC LIMIT $3 OFFSET $4",
        )
        .bind(notification_id)
        .bind(user_id)
        .bind(limit)
        .bind(offset)
        .fetch_all(pool)
        .await
        .map_err(AppError::Database)
    }
}

impl NotificationService {
    pub async fn list_deliveries(
        &self,
        session: &Session,
        limit: i64,
        offset: i64,
    ) -> Result<Vec<NotificationDelivery>, AppError> {
        let user_id = session.user().ok_or(AppError::Unauthorized)?;
        let (limit, offset) = clamp_limit_offset(limit, offset);
        NotificationDelivery::list_for_user(self.ctx.db.reader(), user_id, limit, offset).await
    }

    pub async fn list_deliveries_for_notification(
        &self,
        session: &Session,
        notification_id: Uuid,
        limit: i64,
        offset: i64,
    ) -> Result<Vec<NotificationDelivery>, AppError> {
        let user_id = session.user().ok_or(AppError::Unauthorized)?;
        let (limit, offset) = clamp_limit_offset(limit, offset);
        NotificationDelivery::list_for_notification(
            self.ctx.db.reader(),
            notification_id,
            user_id,
            limit,
            offset,
        )
        .await
    }
}