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::WikiPage;
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,
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct QueryParams {
    /// Target version number to revert to
    pub version: i32,
    /// Optional commit message describing the revert
    pub commit_message: Option<String>,
}

/// Revert a wiki page to a historical version
///
/// Reverts the wiki page to a specified historical version.
/// Requires at least Member role in the repository.
///
/// This creates a new revision with the content from the target version.
/// The current content is not lost; it remains in the revision history.
///
/// Returns the updated wiki page with the reverted content.
#[utoipa::path(
    post,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/wiki/{slug}/revert",
    tag = "Wiki",
    operation_id = "wikiRevertPage",
    params(PathParams, QueryParams),
    responses(
        (status = 200, description = "Wiki page reverted successfully.", body = ApiResponse<WikiPage>),
        (status = 400, description = "Invalid version number", body = ApiErrorResponse),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "Insufficient permissions (requires Member role or higher)", 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 revert_page(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    query: web::Query<QueryParams>,
) -> Result<HttpResponse, AppError> {
    let page = service
        .repo
        .wiki_revert_to_version(
            &session,
            &path.workspace_name,
            &path.repo_name,
            &path.slug,
            query.version,
            query.commit_message.clone(),
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(page)))
}