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

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::error::AppError;
use crate::models::base_info::{resolve_users, resolve_workspaces};
use crate::models::repos::RepoDetail;
use crate::service::AppService;
use crate::session::Session;

#[derive(Debug, Deserialize, IntoParams)]
pub struct PathParams {
    /// Workspace name (unique identifier)
    pub workspace_name: String,
}

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

/// List repositories in a workspace
///
/// Returns a paginated list of repositories that the current user has access to within the specified workspace.
/// Access is determined by:
/// - Public repositories: accessible to all authenticated users
/// - Private repositories: accessible only to repository members and workspace owners
/// - Internal repositories: accessible to all workspace members
///
/// The results are sorted by creation date in descending order (newest first).
#[utoipa::path(
    get,
    path = "/api/v1/workspaces/{workspace_name}/repos",
    tag = "Repos",
    operation_id = "repoList",
    params(
        PathParams,
        QueryParams,
    ),
    responses(
        (status = 200, description = "Repositories listed successfully. Returns an array of repository objects with metadata.", body = ApiResponse<Vec<RepoDetail>>),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "Insufficient permissions to access this workspace", body = ApiErrorResponse),
        (status = 404, description = "Workspace not found", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn list(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    query: web::Query<QueryParams>,
) -> Result<HttpResponse, AppError> {
    let repos = service
        .repo
        .repo_list(
            &session,
            &path.workspace_name,
            query.limit.unwrap_or(50),
            query.offset.unwrap_or(0),
        )
        .await?;

    let db = &service.ctx.db;
    let owner_ids: Vec<Uuid> = repos.iter().map(|r| r.owner_id).collect();
    let ws_ids: Vec<Uuid> = repos.iter().map(|r| r.workspace_id).collect();
    let users = resolve_users(db, &owner_ids).await?;
    let workspaces = resolve_workspaces(db, &ws_ids).await?;
    let details: Vec<RepoDetail> = repos
        .into_iter()
        .map(|r| {
            let owner = users.get(&r.owner_id).cloned().unwrap_or_default();
            let workspace = workspaces.get(&r.workspace_id).cloned().unwrap_or_default();
            r.into_detail(owner, workspace)
        })
        .collect();

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