use crate::error::AppError;
use crate::models::prs::PrFile;
use crate::service::PrService;
use crate::session::Session;

use super::util::clamp_limit_offset;

impl PrService {
    pub async fn pr_files(
        &self,
        ctx: &Session,
        wk_name: &str,
        repo_name: &str,
        number: i64,
        limit: i64,
        offset: i64,
    ) -> Result<Vec<PrFile>, AppError> {
        let user_uid = ctx.user().ok_or(AppError::Unauthorized)?;
        let pr = self.resolve_pr(wk_name, repo_name, number).await?;
        self.ensure_pr_readable(user_uid, &pr).await?;
        let (limit, offset) = clamp_limit_offset(limit, offset);
        sqlx::query_as::<_, PrFile>(
            "SELECT id, pull_request_id, path, old_path, status, additions, deletions, changes, \
             patch, created_at, updated_at \
             FROM pr_file WHERE pull_request_id = $1 ORDER BY path ASC LIMIT $2 OFFSET $3",
        )
        .bind(pr.id)
        .bind(limit)
        .bind(offset)
        .fetch_all(self.ctx.db.reader())
        .await
        .map_err(AppError::Database)
    }
}