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 {
    /// Workspace name (unique identifier)
    pub workspace_name: String,
    /// Repository name (unique within the workspace)
    pub repo_name: String,
}

/// Sync a fork with upstream
///
/// Synchronizes a forked repository with the latest changes from the parent repository.
/// Requires Write role or higher in the fork repository.
///
/// Effects:
/// - Merges changes from the parent repository's default branch into the fork
/// - Creates a merge commit if there are conflicts
/// - Updates the fork's commit history
///
/// Only works on repositories that are forks (have a parent repository).
/// Returns success message on completion.
#[utoipa::path(
    post,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/sync",
    tag = "Repos",
    operation_id = "repoSyncFork",
    params(PathParams),
    responses(
        (status = 200, description = "Fork synchronized successfully with upstream repository.", body = ApiResponse<String>),
        (status = 400, description = "Repository is not a fork or has merge conflicts that require manual resolution", body = ApiErrorResponse),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "Insufficient permissions (requires Write role or higher)", body = ApiErrorResponse),
        (status = 404, description = "Repository, workspace, or parent repository not found", body = ApiErrorResponse),
        (status = 409, description = "Merge conflicts detected; manual resolution required", body = ApiErrorResponse),
        (status = 500, description = "Internal server error or Git operation failed", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn sync_fork(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
) -> Result<HttpResponse, AppError> {
    service
        .repo
        .repo_sync_fork(&session, &path.workspace_name, &path.repo_name)
        .await?;

    Ok(HttpResponse::Ok().json(ApiResponse::new(
        "Fork synchronized successfully".to_string(),
    )))
}