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

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::service::repo::core::CreateRepoParams;
use crate::session::Session;

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

/// Create a new repository
///
/// Creates a new Git repository within the specified workspace. The authenticated user becomes the repository owner.
///
/// Requirements:
/// - User must have at least Member role in the workspace
/// - Repository name must be unique within the workspace
/// - Name must be 1-100 characters, alphanumeric, hyphens, underscores, and dots allowed
///
/// Optional parameters:
/// - description: Repository description (max 500 characters)
/// - visibility: "public", "private", or "internal" (defaults to workspace setting)
/// - default_branch: Default branch name (defaults to "main")
///
/// Returns the created repository with full metadata.
#[utoipa::path(
    post,
    path = "/api/v1/workspaces/{workspace_name}/repos",
    tag = "Repos",
    operation_id = "repoCreate",
    params(PathParams),
    request_body(
        content = CreateRepoParams,
        description = "Repository creation parameters",
        content_type = "application/json"
    ),
    responses(
        (status = 201, description = "Repository created successfully. Returns the newly created repository with full metadata.", body = ApiResponse<RepoDetail>),
        (status = 400, description = "Invalid parameters: name too long, invalid characters, or invalid visibility", body = ApiErrorResponse),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "Insufficient permissions to create repositories in this workspace", body = ApiErrorResponse),
        (status = 404, description = "Workspace not found", body = ApiErrorResponse),
        (status = 409, description = "Repository with this name already exists in the workspace", body = ApiErrorResponse),
        (status = 500, description = "Internal server error or Git initialization failed", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn create(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    params: web::Json<CreateRepoParams>,
) -> Result<HttpResponse, AppError> {
    let repo = service
        .repo
        .repo_create(&session, &path.workspace_name, params.into_inner())
        .await?;

    let db = &service.ctx.db;
    let users = resolve_users(db, &[repo.owner_id]).await?;
    let workspaces = resolve_workspaces(db, &[repo.workspace_id]).await?;
    let owner = users.get(&repo.owner_id).cloned().unwrap_or_default();
    let workspace = workspaces
        .get(&repo.workspace_id)
        .cloned()
        .unwrap_or_default();
    let detail = repo.into_detail(owner, workspace);

    Ok(HttpResponse::Created().json(ApiResponse::new(detail)))
}