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

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

#[derive(Deserialize, utoipa::IntoParams)]
pub struct ListQuery {
    pub limit: Option<i64>,
    pub offset: Option<i64>,
}

#[utoipa::path(
    get,
    path = "/api/v1/workspaces",
    tag = "Workspaces",
    operation_id = "workspaceList",
    summary = "List accessible workspaces",
    description = "Return workspaces owned by, joined by, or publicly accessible to the current user.",
    params(ListQuery),
    responses(
        (status = 200, description = "List of workspaces.", body = ApiResponse<Vec<WorkspaceDetail>>),
        (status = 401, description = "Unauthenticated.", body = ApiErrorResponse),
        (status = 500, description = "Database read failed.", body = ApiErrorResponse)
    )
)]
pub async fn handle(
    service: web::Data<AppService>,
    session: Session,
    query: web::Query<ListQuery>,
) -> Result<HttpResponse, AppError> {
    let data = service
        .workspace
        .workspace_list(
            &session,
            query.limit.unwrap_or(50),
            query.offset.unwrap_or(0),
        )
        .await?;

    let db = &service.ctx.db;
    let owner_ids: Vec<Uuid> = data.iter().map(|w| w.owner_id).collect();
    let users = resolve_users(db, &owner_ids).await?;
    let details: Vec<WorkspaceDetail> = data
        .into_iter()
        .map(|w| {
            let owner = users.get(&w.owner_id).cloned().unwrap_or_default();
            w.into_detail(owner)
        })
        .collect();

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