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

use crate::api::response::{ApiResponse, ApiErrorResponse};
use crate::error::AppError;
use crate::models::repos::BranchProtectionRule;
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,
    /// Protection rule ID (UUID)
    pub rule_id: uuid::Uuid,
}

/// Get a specific branch protection rule
///
/// Returns detailed information about a specific branch protection rule.
/// Requires read access to the repository.
/// 
/// Returns the complete protection rule with all configuration details including:
/// - Branch name pattern
/// - Required approvals and status checks
/// - Push and deletion restrictions
/// - Creator information and timestamps
#[utoipa::path(
    get,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/protection-rules/{rule_id}",
    tag = "Repos",
    operation_id = "repoGetProtectionRule",
    params(PathParams),
    responses(
        (status = 200, description = "Protection rule retrieved successfully. Returns complete protection rule with all configuration details.", body = ApiResponse<BranchProtectionRule>),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "Insufficient permissions to access this repository", body = ApiErrorResponse),
        (status = 404, description = "Repository, workspace, or protection rule not found", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn get_protection_rule(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
) -> Result<HttpResponse, AppError> {
    let rule = service
        .repo
        .repo_get_protection_rule(&session, &path.workspace_name, &path.repo_name, path.rule_id)
        .await?;

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