mongo-orm 0.3.0

use crate::entity::MongoEntity;
use async_trait::async_trait;
use futures::TryStreamExt;
use mongodb::options::FindOptions;
use mongodb::{
    bson::{doc, oid::ObjectId, Document},
    Collection,
};

use typed_builder::TypedBuilder;

#[async_trait]
pub trait MongoRepository<E> {
    async fn find_by_id(&self, id: &str) -> Option<E>;

    async fn insert(&self, entity: &E) -> String;

    async fn insert_many(&self, entities: &[E]);

    async fn update_by_id(&self, id: &str, update: Document);

    async fn update_one_by(&self, filter: Document, update: Document);

    async fn update_many(&self, filter: Document, update: Document) -> (u64, u64);

    async fn delete_by_id(&self, id: &str) -> bool;

    async fn find(&self, option: FindOption) -> Vec<E>;

    async fn find_one_by(&self, filter: Document) -> Option<E>;

    async fn count(&self, filter: Option<Document>) -> u64;

    async fn exists(&self, filter: Document) -> bool;

    async fn delete_by(&self, filter: Document) -> u64;

    async fn aggregate(&self, stages: Vec<Document>) -> Vec<Document>;
}

impl<E: MongoEntity> MongoRepo<E> {
    pub fn new(collection: Collection<Document>) -> Self {
        Self {
            collection,
            entity: Default::default(),
        }
    }
}
#[derive(Debug)]
pub struct MongoRepo<E: MongoEntity> {
    collection: Collection<Document>,
    entity: std::marker::PhantomData<E>,
}

#[derive(Debug, TypedBuilder, Clone)]
pub struct FindOption {
    #[builder(default, setter(strip_option))] // Optional field, allows None or Some(Document)
    pub filter: Option<Document>,

    #[builder(default, setter(strip_option))] // Optional field
    pub sort: Option<Document>,

    #[builder(default, setter(strip_option))] // Optional field
    pub limit: Option<i64>,

    #[builder(default, setter(strip_option))] // Optional field
    pub skip: Option<u64>,
}

impl FindOption {
    pub fn all() -> Self {
        FindOption {
            filter: None,
            sort: None,
            limit: None,
            skip: None,
        }
    }
}

impl Into<FindOptions> for FindOption {
    fn into(self) -> FindOptions {
        let mut builder = FindOptions::default();

        builder.sort = self.sort;
        builder.skip = self.skip;
        builder.limit = self.limit;

        builder
    }
}

#[async_trait]
impl<E> MongoRepository<E> for MongoRepo<E>
where
    E: MongoEntity,
{
    async fn find_by_id(&self, id: &str) -> Option<E> {
        let object_id = ObjectId::parse_str(id);

        let find = match object_id {
            Ok(oid) => self.collection.find_one(doc! { "_id": oid }),
            Err(_) => self.collection.find_one(doc! { "_id": id }),
        };

        find.await.unwrap().map(E::from_document)
    }

    async fn insert(&self, entity: &E) -> String {
        let id = self
            .collection
            .insert_one(entity.to_document())
            .await
            .unwrap()
            .inserted_id;

        if let Some(oid) = id.as_object_id() {
            oid.to_hex()
        } else {
            id.to_string()
        }
    }

    async fn insert_many(&self, entities: &[E]) {
        let documents: Vec<Document> = entities.iter().map(|e| e.to_document()).collect();
        self.collection.insert_many(documents).await.unwrap();
    }

    async fn update_by_id(&self, id: &str, update: Document) {
        let f = ObjectId::parse_str(id)
            .map(|oid| doc! { "_id": oid })
            .unwrap_or(doc! { "_id": id });
        self.collection
            .update_one(f, doc! { "$set": update })
            .await
            .unwrap();
    }

    async fn update_one_by(&self, filter: Document, update: Document) {
        self.collection
            .update_one(filter, doc! { "$set": update })
            .await
            .unwrap();
    }

    async fn update_many(&self, filter: Document, update: Document) -> (u64, u64) {
        let result = self
            .collection
            .update_many(filter, doc! { "$set": update })
            .await
            .unwrap();
        (result.matched_count, result.modified_count)
    }

    async fn delete_by_id(&self, id: &str) -> bool {
        let object_id = ObjectId::parse_str(id).unwrap();
        let result = self
            .collection
            .delete_one(doc! { "_id": object_id })
            .await
            .unwrap();
        result.deleted_count > 0
    }

    async fn find(&self, option: FindOption) -> Vec<E> {
        let options: FindOptions = option.clone().into();
        let mut cursor = self
            .collection
            .find(option.filter.unwrap_or(doc! {}))
            .with_options(options)
            .await
            .unwrap();
        let mut results = Vec::new();
        while let Some(doc) = cursor.try_next().await.unwrap() {
            results.push(E::from_document(doc));
        }
        results
    }

    async fn find_one_by(&self, filter: Document) -> Option<E> {
        self.collection
            .find_one(filter)
            .await
            .unwrap()
            .map(E::from_document)
    }

    async fn count(&self, filter: Option<Document>) -> u64 {
        self.collection
            .count_documents(filter.unwrap_or_default())
            .await
            .unwrap()
    }

    async fn exists(&self, filter: Document) -> bool {
        self.collection.count_documents(filter).await.unwrap() > 0
    }

    async fn delete_by(&self, filter: Document) -> u64 {
        let result = self.collection.delete_many(filter).await.unwrap();
        result.deleted_count
    }

    async fn aggregate(&self, stages: Vec<Document>) -> Vec<Document> {
        let cursor = self.collection.aggregate(stages).await.unwrap();
        cursor.try_collect().await.unwrap()
    }
}