use crate::{errors::ApiError, extractors::AuthUser, state::AppState};
use api_types::requests::SetTopFriendsRequest;
use application::use_cases::profile::{get_top_friends, get_user_by_username, set_top_friends};
use application::use_cases::social::*;
use axum::{
    extract::{Path, State},
    http::StatusCode,
    Json,
};
use domain::value_objects::{ThoughtId, UserId};
use uuid::Uuid;

#[utoipa::path(post, path = "/thoughts/{id}/like", params(("id" = uuid::Uuid, Path, description = "Thought ID")), responses((status = 204, description = "Liked")), security(("bearer_auth" = [])))]
pub async fn post_like(
    State(s): State<AppState>,
    AuthUser(uid): AuthUser,
    Path(id): Path<Uuid>,
) -> Result<StatusCode, ApiError> {
    like_thought(&*s.likes, &*s.events, &uid, &ThoughtId::from_uuid(id)).await?;
    Ok(StatusCode::NO_CONTENT)
}
#[utoipa::path(delete, path = "/thoughts/{id}/like", params(("id" = uuid::Uuid, Path, description = "Thought ID")), responses((status = 204, description = "Unliked")), security(("bearer_auth" = [])))]
pub async fn delete_like(
    State(s): State<AppState>,
    AuthUser(uid): AuthUser,
    Path(id): Path<Uuid>,
) -> Result<StatusCode, ApiError> {
    unlike_thought(&*s.likes, &*s.events, &uid, &ThoughtId::from_uuid(id)).await?;
    Ok(StatusCode::NO_CONTENT)
}
#[utoipa::path(post, path = "/thoughts/{id}/boost", params(("id" = uuid::Uuid, Path, description = "Thought ID")), responses((status = 204, description = "Boosted")), security(("bearer_auth" = [])))]
pub async fn post_boost(
    State(s): State<AppState>,
    AuthUser(uid): AuthUser,
    Path(id): Path<Uuid>,
) -> Result<StatusCode, ApiError> {
    boost_thought(&*s.boosts, &*s.events, &uid, &ThoughtId::from_uuid(id)).await?;
    Ok(StatusCode::NO_CONTENT)
}
#[utoipa::path(delete, path = "/thoughts/{id}/boost", params(("id" = uuid::Uuid, Path, description = "Thought ID")), responses((status = 204, description = "Unboosted")), security(("bearer_auth" = [])))]
pub async fn delete_boost(
    State(s): State<AppState>,
    AuthUser(uid): AuthUser,
    Path(id): Path<Uuid>,
) -> Result<StatusCode, ApiError> {
    unboost_thought(&*s.boosts, &*s.events, &uid, &ThoughtId::from_uuid(id)).await?;
    Ok(StatusCode::NO_CONTENT)
}
#[utoipa::path(
    post, path = "/users/{username}/follow",
    params(("username" = String, Path, description = "Username or user@domain handle")),
    responses((status = 204, description = "Following")),
    security(("bearer_auth" = []))
)]
pub async fn post_follow(
    State(s): State<AppState>,
    AuthUser(uid): AuthUser,
    Path(username): Path<String>,
) -> Result<StatusCode, ApiError> {
    if username.contains('@') {
        s.federation.follow_remote(&uid, &username).await?;
    } else {
        let target = get_user_by_username(&*s.users, &username).await?;
        follow_user(&*s.follows, &*s.events, &uid, &target.id).await?;
    }
    Ok(StatusCode::NO_CONTENT)
}
#[utoipa::path(
    delete, path = "/users/{username}/follow",
    params(("username" = String, Path, description = "Username")),
    responses((status = 204, description = "Unfollowed")),
    security(("bearer_auth" = []))
)]
pub async fn delete_follow(
    State(s): State<AppState>,
    AuthUser(uid): AuthUser,
    Path(username): Path<String>,
) -> Result<StatusCode, ApiError> {
    if username.contains('@') {
        return Err(ApiError::BadRequest(
            "remote unfollow not yet supported".into(),
        ));
    }
    let target = get_user_by_username(&*s.users, &username).await?;
    unfollow_user(&*s.follows, &*s.events, &uid, &target.id).await?;
    Ok(StatusCode::NO_CONTENT)
}
#[utoipa::path(post, path = "/users/{username}/block", params(("username" = String, Path, description = "Username")), responses((status = 204, description = "Blocked")), security(("bearer_auth" = [])))]
pub async fn post_block(
    State(s): State<AppState>,
    AuthUser(uid): AuthUser,
    Path(username): Path<String>,
) -> Result<StatusCode, ApiError> {
    let target = get_user_by_username(&*s.users, &username).await?;
    block_user(&*s.blocks, &*s.events, &uid, &target.id).await?;
    Ok(StatusCode::NO_CONTENT)
}
#[utoipa::path(delete, path = "/users/{username}/block", params(("username" = String, Path, description = "Username")), responses((status = 204, description = "Unblocked")), security(("bearer_auth" = [])))]
pub async fn delete_block(
    State(s): State<AppState>,
    AuthUser(uid): AuthUser,
    Path(username): Path<String>,
) -> Result<StatusCode, ApiError> {
    let target = get_user_by_username(&*s.users, &username).await?;
    unblock_user(&*s.blocks, &*s.events, &uid, &target.id).await?;
    Ok(StatusCode::NO_CONTENT)
}
#[utoipa::path(put, path = "/users/me/top-friends", request_body = SetTopFriendsRequest, responses((status = 204, description = "Top friends updated")), security(("bearer_auth" = [])))]
pub async fn put_top_friends(
    State(s): State<AppState>,
    AuthUser(uid): AuthUser,
    Json(body): Json<SetTopFriendsRequest>,
) -> Result<StatusCode, ApiError> {
    let ids: Vec<UserId> = body.friend_ids.into_iter().map(UserId::from_uuid).collect();
    set_top_friends(&*s.top_friends, &uid, ids).await?;
    Ok(StatusCode::NO_CONTENT)
}
#[utoipa::path(get, path = "/users/{username}/top-friends", params(("username" = String, Path, description = "Username")), responses((status = 200, description = "Top friends list")))]
pub async fn get_top_friends_handler(
    State(s): State<AppState>,
    Path(username): Path<String>,
) -> Result<Json<serde_json::Value>, ApiError> {
    let user = get_user_by_username(&*s.users, &username).await?;
    let friends = get_top_friends(&*s.top_friends, &user.id).await?;
    let usernames: Vec<&str> = friends.iter().map(|(_, u)| u.username.as_str()).collect();
    Ok(Json(serde_json::json!({ "topFriends": usernames })))
}

#[cfg(test)]
mod tests {
    use super::*;
    use async_trait::async_trait;
    use axum::{
        body::Body,
        http::Request,
        routing::{delete, post},
        Router,
    };
    use domain::{
        errors::DomainError,
        ports::{AuthService, GeneratedToken, PasswordHasher},
        testing::TestStore,
        value_objects::{PasswordHash, UserId},
    };
    use std::sync::Arc;
    use tower::ServiceExt;

    struct NoOpAuth;
    impl AuthService for NoOpAuth {
        fn generate_token(&self, _uid: &UserId) -> Result<GeneratedToken, DomainError> {
            Err(DomainError::Internal("noop".into()))
        }
        fn validate_token(&self, _token: &str) -> Result<UserId, DomainError> {
            Err(DomainError::Unauthorized)
        }
    }

    struct NoOpHasher;
    #[async_trait]
    impl PasswordHasher for NoOpHasher {
        async fn hash(&self, _plain: &str) -> Result<PasswordHash, DomainError> {
            Err(DomainError::Internal("noop".into()))
        }
        async fn verify(&self, _plain: &str, _hash: &PasswordHash) -> Result<bool, DomainError> {
            Ok(false)
        }
    }

    fn make_state() -> crate::state::AppState {
        let store = Arc::new(TestStore::default());
        crate::state::AppState {
            users: store.clone(),
            thoughts: store.clone(),
            likes: store.clone(),
            boosts: store.clone(),
            follows: store.clone(),
            blocks: store.clone(),
            tags: store.clone(),
            api_keys: store.clone(),
            top_friends: store.clone(),
            notifications: store.clone(),
            remote_actors: store.clone(),
            feed: store.clone(),
            search: store.clone(),
            auth: Arc::new(NoOpAuth),
            hasher: Arc::new(NoOpHasher),
            events: store.clone(),
            federation: store.clone(),
        }
    }

    fn app() -> Router {
        Router::new()
            .route(
                "/users/{username}/follow",
                post(post_follow).delete(delete_follow),
            )
            .with_state(make_state())
    }

    #[tokio::test]
    async fn follow_without_auth_returns_401() {
        let resp = app()
            .oneshot(
                Request::builder()
                    .method("POST")
                    .uri("/users/alice/follow")
                    .body(Body::empty())
                    .unwrap(),
            )
            .await
            .unwrap();
        assert_eq!(resp.status(), 401);
    }

    #[tokio::test]
    async fn unfollow_remote_without_auth_returns_401() {
        let resp = app()
            .oneshot(
                Request::builder()
                    .method("DELETE")
                    .uri("/users/alice@example.com/follow")
                    .body(Body::empty())
                    .unwrap(),
            )
            .await
            .unwrap();
        assert_eq!(resp.status(), 401);
    }
}