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,
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct QueryParams {
    /// Maximum number of revisions to return (default: 50, max: 100)
    pub limit: Option<i64>,
    /// Number of revisions to skip for pagination (default: 0)
    pub offset: Option<i64>,
}

/// List wiki page revisions
///
/// Returns a paginated list of all revisions for a wiki page, sorted by version (newest first).
/// Requires read access to the repository.
///
/// Each revision includes the full content snapshot at that version,
/// the editor who made the change, and an optional commit message.
#[utoipa::path(
    get,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/wiki/{slug}/revisions",
    tag = "Wiki",
    operation_id = "wikiListRevisions",
    params(PathParams, QueryParams),
    responses(
        (status = 200, description = "Revisions listed successfully.", body = ApiResponse<Vec<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, repository, or workspace not found", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn list_revisions(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    query: web::Query<QueryParams>,
) -> Result<HttpResponse, AppError> {
    let revisions = service
        .repo
        .wiki_get_revisions(
            &session,
            &path.workspace_name,
            &path.repo_name,
            &path.slug,
            query.limit.unwrap_or(50),
            query.offset.unwrap_or(0),
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(revisions)))
}