use super::handlers;
use crate::core::state::AppState;
use axum::{Router, routing::get};

pub fn router() -> Router<AppState> {
    Router::new()
        .route("/messages", get(handlers::get_all).post(handlers::create))
        .route(
            "/messages/{id}",
            get(handlers::get_by_id)
                .put(handlers::update)
                .delete(handlers::delete),
        )
        .route(
            "/messages/{message_id}/reactions",
            axum::routing::post(handlers::add_reaction),
        )
        .route(
            "/messages/{message_id}/reactions/{emoji_id}",
            axum::routing::delete(handlers::remove_reaction),
        )
}

#[cfg(test)]
pub(crate) mod permission_tests {
    use super::*;
    use crate::config::{AppConfig, DEFAULT_CONFIG_TOML};
    use crate::core::App;
    use crate::http::context::{CurrentUser, RequestContext};
    use crate::models::{channel, channel_user_permission, emoji, server_user, user};
    use crate::permissions::ChannelPermission;
    use axum::{
        body::Body,
        http::{Method, Request, StatusCode},
    };
    use sea_orm::{ActiveModelTrait, ColumnTrait, EntityTrait, QueryFilter, Set};
    use std::time::Instant;
    use tower::ServiceExt;
    use uuid::Uuid;

    pub(crate) struct Fixture {
        pub state: AppState,
        pub user: user::Model,
        pub channel_id: Uuid,
    }

    impl Fixture {
        pub async fn new() -> Self {
            let mut config: AppConfig = toml::from_str(DEFAULT_CONFIG_TOML).unwrap();
            config.database.url = "sqlite::memory:".into();
            config.network.stun_servers.clear();
            config.media.root =
                format!("src/routes/attachment/.permission-test-{}", Uuid::new_v4());
            let state = App::build(config).await.unwrap().state;
            let user = user::ActiveModel {
                id: Set(Uuid::new_v4()),
                username: Set(format!("test-{}", Uuid::new_v4())),
                password: Set(String::new()),
                pub_key: Set(None),
                created_at: Set(chrono::Utc::now()),
                updated_at: Set(chrono::Utc::now()),
                is_superuser: Set(false),
            }
            .insert(&state.db)
            .await
            .unwrap();
            server_user::ActiveModel {
                id: Set(Uuid::new_v4()),
                server_id: Set(state.default_server.id),
                user_id: Set(user.id),
                username: Set(None),
                joined_at: Set(chrono::Utc::now()),
                updated_at: Set(chrono::Utc::now()),
            }
            .insert(&state.db)
            .await
            .unwrap();
            let channel = channel::ActiveModel {
                id: Set(Uuid::new_v4()),
                server_id: Set(Some(state.default_server.id)),
                category_id: Set(None),
                channel_type: Set(channel::ChannelType::Text),
                name: Set(Some("test".into())),
                created_at: Set(chrono::Utc::now()),
                updated_at: Set(chrono::Utc::now()),
            }
            .insert(&state.db)
            .await
            .unwrap();
            Self {
                state,
                user,
                channel_id: channel.id,
            }
        }

        pub async fn grant(&self, permissions: ChannelPermission) {
            channel_user_permission::ActiveModel {
                id: Set(Uuid::new_v4()),
                channel_id: Set(self.channel_id),
                user_id: Set(self.user.id),
                permissions: Set(permissions.bits() as i64),
            }
            .insert(&self.state.db)
            .await
            .unwrap();
        }

        pub async fn request(
            &self,
            router: Router<AppState>,
            method: Method,
            uri: &str,
            body: Body,
            content_type: Option<&str>,
        ) -> StatusCode {
            let mut builder = Request::builder().method(method.clone()).uri(uri);
            if let Some(content_type) = content_type {
                builder = builder.header("content-type", content_type);
            }
            let mut request = builder.body(body).unwrap();
            request.extensions_mut().insert(RequestContext {
                request_id: Uuid::new_v4(),
                started_at: Instant::now(),
                method,
                uri: uri.parse().unwrap(),
                user: Some(CurrentUser(self.user.clone())),
            });
            router
                .with_state(self.state.clone())
                .oneshot(request)
                .await
                .unwrap()
                .status()
        }
    }

    #[tokio::test]
    async fn message_list_requires_read_channel() {
        let fixture = Fixture::new().await;
        let uri = format!("/messages?channel_id={}", fixture.channel_id);
        // L'accès aux messages du canal demande READ_CHANNEL.
        assert_eq!(
            fixture
                .request(router(), Method::GET, &uri, Body::empty(), None)
                .await,
            StatusCode::FORBIDDEN
        );
        fixture.grant(ChannelPermission::READ_CHANNEL).await;
        assert_eq!(
            fixture
                .request(router(), Method::GET, &uri, Body::empty(), None)
                .await,
            StatusCode::OK
        );
    }

    #[tokio::test]
    async fn message_create_requires_send_message() {
        let fixture = Fixture::new().await;
        let payload = format!(
            r#"{{"channel_id":"{}","content":"hello","file_ids":[]}}"#,
            fixture.channel_id
        );
        let send = || Body::from(payload.clone());
        // SEND_MESSAGE est distinct du droit de lire le canal.
        assert_eq!(
            fixture
                .request(
                    router(),
                    Method::POST,
                    "/messages",
                    send(),
                    Some("application/json")
                )
                .await,
            StatusCode::FORBIDDEN
        );
        fixture.grant(ChannelPermission::SEND_MESSAGE).await;
        assert_eq!(
            fixture
                .request(
                    router(),
                    Method::POST,
                    "/messages",
                    send(),
                    Some("application/json")
                )
                .await,
            StatusCode::CREATED
        );
    }

    #[tokio::test]
    async fn message_edit_and_delete_require_own_permissions() {
        // L'édition et la suppression d'un message propre ont des permissions distinctes.
        for (method, permission, success) in [
            (
                Method::PUT,
                ChannelPermission::EDIT_OWN_MESSAGE,
                StatusCode::OK,
            ),
            (
                Method::DELETE,
                ChannelPermission::DELETE_OWN_MESSAGE,
                StatusCode::NO_CONTENT,
            ),
        ] {
            let fixture = Fixture::new().await;
            let message = fixture
                .state
                .services
                .message
                .create_message_with_attachments(
                    fixture.channel_id,
                    fixture.user.id,
                    "hello".into(),
                    Vec::new(),
                    None,
                )
                .await
                .unwrap();
            let uri = format!("/messages/{}", message.id);
            let body = || Body::from(r#"{"content":"edited"}"#);
            assert_eq!(
                fixture
                    .request(
                        router(),
                        method.clone(),
                        &uri,
                        body(),
                        Some("application/json")
                    )
                    .await,
                StatusCode::FORBIDDEN
            );
            fixture.grant(permission).await;
            assert_eq!(
                fixture
                    .request(router(), method, &uri, body(), Some("application/json"))
                    .await,
                success
            );
        }
    }

    #[tokio::test]
    async fn reactions_require_read_and_add_permissions() {
        let fixture = Fixture::new().await;
        // Prépare un message et un emoji afin de tester les deux opérations de réaction.
        let message = fixture
            .state
            .services
            .message
            .create_message_with_attachments(
                fixture.channel_id,
                fixture.user.id,
                "hello".into(),
                Vec::new(),
                None,
            )
            .await
            .unwrap();
        let emoji = emoji::ActiveModel {
            id: Set(Uuid::new_v4()),
            server_id: Set(Some(fixture.state.default_server.id)),
            name: Set("wave".into()),
            emoji_type: Set("unicode".into()),
            unicode_sequence: Set(Some("👋".into())),
            supports_skin_tone: Set(false),
            file_path: Set(None),
            mime_type: Set(None),
            file_size: Set(None),
            is_animated: Set(false),
            sha256: Set(None),
            created_at: Set(chrono::Utc::now()),
            updated_at: Set(chrono::Utc::now()),
        }
        .insert(&fixture.state.db)
        .await
        .unwrap();
        let add_uri = format!("/messages/{}/reactions", message.id);
        let remove_uri = format!("{add_uri}/{}", emoji.id);
        let payload = || Body::from(format!(r#"{{"emoji_id":"{}"}}"#, emoji.id));
        // Sans permission, l'ajout et le retrait sont refusés.
        assert_eq!(
            fixture
                .request(
                    router(),
                    Method::POST,
                    &add_uri,
                    payload(),
                    Some("application/json")
                )
                .await,
            StatusCode::FORBIDDEN
        );
        assert_eq!(
            fixture
                .request(router(), Method::DELETE, &remove_uri, Body::empty(), None)
                .await,
            StatusCode::FORBIDDEN
        );
        fixture.grant(ChannelPermission::READ_CHANNEL).await;
        // Lire le canal seul ne suffit pas pour ajouter une réaction.
        assert_eq!(
            fixture
                .request(
                    router(),
                    Method::POST,
                    &add_uri,
                    payload(),
                    Some("application/json")
                )
                .await,
            StatusCode::FORBIDDEN
        );
        channel_user_permission::Entity::delete_many()
            .filter(channel_user_permission::Column::UserId.eq(fixture.user.id))
            .exec(&fixture.state.db)
            .await
            .unwrap();
        fixture
            .grant(ChannelPermission::READ_CHANNEL | ChannelPermission::ADD_REACTIONS)
            .await;
        // L'ajout requiert les deux droits; le retrait est ensuite autorisé aussi.
        assert_eq!(
            fixture
                .request(
                    router(),
                    Method::POST,
                    &add_uri,
                    payload(),
                    Some("application/json")
                )
                .await,
            StatusCode::CREATED
        );
        assert_eq!(
            fixture
                .request(router(), Method::DELETE, &remove_uri, Body::empty(), None)
                .await,
            StatusCode::NO_CONTENT
        );
    }
}