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

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::error::AppError;
use crate::models::repos::RepoInvitation;
use crate::service::AppService;
use crate::service::repo::invitations::CreateRepoInvitationParams;
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,
}

/// Create a repository invitation
///
/// Sends an invitation email to a user to join the repository with a specific role.
/// Requires Admin role or higher in the repository.
///
/// Parameters:
/// - email: Email address of the invitee (must be a valid email)
/// - role: Role to assign when invitation is accepted ("read", "write", "admin")
///
/// Effects:
/// - Invitation email is sent to the invitee
/// - Invitation expires after 7 days
/// - Invitee must have a verified email to accept
///
/// Returns the created invitation with metadata including expiration date.
#[utoipa::path(
    post,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/invitations",
    tag = "Repos",
    operation_id = "repoCreateInvitation",
    params(PathParams),
    request_body(
        content = CreateRepoInvitationParams,
        description = "Invitation creation parameters",
        content_type = "application/json"
    ),
    responses(
        (status = 201, description = "Invitation created successfully. Returns the newly created invitation with metadata.", body = ApiResponse<RepoInvitation>),
        (status = 400, description = "Invalid parameters: invalid email format or invalid role", body = ApiErrorResponse),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "Insufficient permissions (requires Admin role or higher)", body = ApiErrorResponse),
        (status = 404, description = "Repository or workspace not found", body = ApiErrorResponse),
        (status = 409, description = "User is already a member or has a pending invitation", body = ApiErrorResponse),
        (status = 500, description = "Internal server error or email sending failed", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn create_invitation(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    params: web::Json<CreateRepoInvitationParams>,
) -> Result<HttpResponse, AppError> {
    let invitation = service
        .repo
        .repo_create_invitation(
            &session,
            &path.workspace_name,
            &path.repo_name,
            params.into_inner(),
        )
        .await?;

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