use std::sync::Arc;

use axum::{
    Json,
    extract::{Path, State},
    http::StatusCode,
    response::IntoResponse,
};
use serde::{Deserialize, Serialize};
use uuid::Uuid;

use crate::routes::api::{AppError, ApiRouter};
use crate::service::proxy::access_rule::{
    AccessRuleService, CreateAccessRuleParams, UpdateAccessRuleParams,
};
use crate::service::proxy::types::AccessRuleConfig;

#[derive(Serialize)]
pub(crate) struct AccessRuleResponse {
    pub id: Uuid,
    pub r#type: String,
    pub ip_cidr: String,
    pub description: Option<String>,
    pub priority: i32,
    pub override_of_id: Option<Uuid>,
}

impl From<AccessRuleConfig> for AccessRuleResponse {
    fn from(c: AccessRuleConfig) -> Self {
        Self {
            id: c.id,
            r#type: c.r#type,
            ip_cidr: c.ip_cidr,
            description: c.description,
            priority: c.priority,
            override_of_id: c.override_of_id,
        }
    }
}

#[derive(Deserialize)]
pub(crate) struct CreateAccessRuleRequest {
    pub server_id: Option<Uuid>,
    pub location_id: Option<Uuid>,
    pub r#type: String,
    pub ip_cidr: String,
    pub description: Option<String>,
    pub priority: i32,
    pub override_of_id: Option<Uuid>,
}

impl From<CreateAccessRuleRequest> for CreateAccessRuleParams {
    fn from(r: CreateAccessRuleRequest) -> Self {
        Self {
            server_id: r.server_id,
            location_id: r.location_id,
            r#type: r.r#type,
            ip_cidr: r.ip_cidr,
            description: r.description,
            priority: r.priority,
            override_of_id: r.override_of_id,
        }
    }
}

#[derive(Deserialize)]
pub(crate) struct UpdateAccessRuleRequest {
    pub server_id: Option<Option<Uuid>>,
    pub location_id: Option<Option<Uuid>>,
    pub r#type: Option<String>,
    pub ip_cidr: Option<String>,
    pub description: Option<Option<String>>,
    pub priority: Option<i32>,
    pub override_of_id: Option<Option<Uuid>>,
}

impl From<UpdateAccessRuleRequest> for UpdateAccessRuleParams {
    fn from(r: UpdateAccessRuleRequest) -> Self {
        Self {
            server_id: r.server_id,
            location_id: r.location_id,
            r#type: r.r#type,
            ip_cidr: r.ip_cidr,
            description: r.description,
            priority: r.priority,
            override_of_id: r.override_of_id,
        }
    }
}

async fn list_access_rules_by_server(
    State(svc): State<Arc<dyn AccessRuleService>>,
    Path(server_id): Path<Uuid>,
) -> Result<Json<Vec<AccessRuleResponse>>, AppError> {
    let rules = svc.list_by_server(server_id).await?;
    Ok(Json(rules.into_iter().map(Into::into).collect()))
}

async fn list_access_rules_by_location(
    State(svc): State<Arc<dyn AccessRuleService>>,
    Path(location_id): Path<Uuid>,
) -> Result<Json<Vec<AccessRuleResponse>>, AppError> {
    let rules = svc.list_by_location(location_id).await?;
    Ok(Json(rules.into_iter().map(Into::into).collect()))
}

async fn create_access_rule(
    State(svc): State<Arc<dyn AccessRuleService>>,
    Json(body): Json<CreateAccessRuleRequest>,
) -> Result<impl IntoResponse, AppError> {
    let rule = svc.create(body.into()).await?;
    Ok((StatusCode::CREATED, Json(AccessRuleResponse::from(rule))))
}

async fn get_access_rule(
    State(svc): State<Arc<dyn AccessRuleService>>,
    Path(id): Path<Uuid>,
) -> Result<Json<AccessRuleResponse>, AppError> {
    let rule = svc.get(id).await?;
    Ok(Json(rule.into()))
}

async fn update_access_rule(
    State(svc): State<Arc<dyn AccessRuleService>>,
    Path(id): Path<Uuid>,
    Json(body): Json<UpdateAccessRuleRequest>,
) -> Result<Json<AccessRuleResponse>, AppError> {
    let rule = svc.update(id, body.into()).await?;
    Ok(Json(rule.into()))
}

async fn delete_access_rule(
    State(svc): State<Arc<dyn AccessRuleService>>,
    Path(id): Path<Uuid>,
) -> Result<impl IntoResponse, AppError> {
    let deleted = svc.delete(id).await?;
    if deleted {
        Ok((StatusCode::NO_CONTENT,))
    } else {
        Err(AppError::NotFound)
    }
}

pub(super) fn routes() -> ApiRouter {
    ApiRouter::new()
        .route(
            "/server-blocks/{server_id}/access-rules",
            axum::routing::get(list_access_rules_by_server),
        )
        .route(
            "/locations/{location_id}/access-rules",
            axum::routing::get(list_access_rules_by_location),
        )
        .route(
            "/access-rules",
            axum::routing::post(create_access_rule),
        )
        .route(
            "/access-rules/{id}",
            axum::routing::get(get_access_rule)
                .put(update_access_rule)
                .delete(delete_access_rule),
        )
}