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

use crate::api::response::{ApiResponse, ApiErrorResponse};
use crate::error::AppError;
use crate::models::repos::RepoInvitation;
use crate::service::AppService;
use crate::session::Session;

#[derive(Debug, Deserialize, ToSchema)]
pub struct AcceptInvitationParams {
    /// Invitation token (received via email)
    pub token: String,
}

/// Accept a repository invitation
///
/// Accepts a pending repository invitation using the token received via email.
/// Requires authentication and a verified email address matching the invitation.
/// 
/// Effects:
/// - User is added as a repository member with the invited role
/// - User is added to the workspace if not already a member
/// - Invitation is marked as accepted
/// 
/// Returns the accepted invitation with full metadata.
#[utoipa::path(
    post,
    path = "/api/v1/repos/invitations/accept",
    tag = "Repos",
    operation_id = "repoAcceptInvitation",
    request_body(
        content = AcceptInvitationParams,
        description = "Invitation acceptance parameters",
        content_type = "application/json"
    ),
    responses(
        (status = 200, description = "Invitation accepted successfully. User is now a member of the repository.", body = ApiResponse<RepoInvitation>),
        (status = 400, description = "Invalid or expired token, or email doesn't match invitation", body = ApiErrorResponse),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 404, description = "Invitation not found", body = ApiErrorResponse),
        (status = 409, description = "User is already a member of this repository", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn accept_invitation(
    service: web::Data<AppService>,
    session: Session,
    params: web::Json<AcceptInvitationParams>,
) -> Result<HttpResponse, AppError> {
    let invitation = service
        .repo
        .repo_accept_invitation(&session, &params.token)
        .await?;

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