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

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::error::AppError;
use crate::models::wiki::WikiPageRevision;
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,
    /// Wiki page slug (URL-friendly identifier)
    pub slug: String,
    /// Revision version number
    pub version: i32,
}

/// Get a specific wiki page revision
///
/// Retrieves a specific revision of a wiki page by version number.
/// Requires read access to the repository.
///
/// Returns the full revision with content snapshot, editor, and commit message.
#[utoipa::path(
    get,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/wiki/{slug}/revisions/{version}",
    tag = "Wiki",
    operation_id = "wikiGetRevision",
    params(PathParams),
    responses(
        (status = 200, description = "Revision retrieved successfully.", body = ApiResponse<WikiPageRevision>),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "Insufficient permissions to access this repository", body = ApiErrorResponse),
        (status = 404, description = "Wiki page, revision, repository, or workspace not found", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn get_revision(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
) -> Result<HttpResponse, AppError> {
    let revision = service
        .repo
        .wiki_get_revision(
            &session,
            &path.workspace_name,
            &path.repo_name,
            &path.slug,
            path.version,
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(revision)))
}