use actix_web::{HttpResponse, web};
use serde::Deserialize;
use utoipa::IntoParams;

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::error::AppError;
use crate::service::AppService;
use crate::session::Session;

#[derive(Debug, Deserialize, IntoParams)]
pub struct PathParams {
    pub workspace_name: String,
    pub repo_name: String,
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct QueryParams {
    pub base: String,
    pub head: String,
    pub page_size: Option<u32>,
}

/// Get diff between two revisions
#[utoipa::path(
    get,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/git/diff",
    tag = "Git",
    operation_id = "gitDiff",
    params(PathParams, QueryParams),
    responses(
        (status = 200, description = "Diff retrieved successfully", body = ApiResponse<crate::pb::repo::GetDiffResponse>),
        (status = 401, description = "Unauthorized", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn git_diff(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    query: web::Query<QueryParams>,
) -> Result<HttpResponse, AppError> {
    let result = service
        .repo
        .git_diff(
            &session,
            &path.workspace_name,
            &path.repo_name,
            &query.base,
            &query.head,
            query.page_size.unwrap_or(30),
        )
        .await?;

    Ok(HttpResponse::Ok().json(ApiResponse::new(result)))
}