use async_trait::async_trait;
use sqlx::Executor;
use sqlx::postgres::PgQueryResult;
use cove_net_common::id::SnowflakeID;
use crate::{CoveDB, CoveDBImpl, CoveDbError};
use crate::part::{BindQueryBuilder, SqlPart};
use crate::query::{PartialQueryResult, QueryResult};
use crate::rows::{DeletableRow, InsertableRow, SelectableRow, TableRow, WhereRow};
use crate::rows::user::{PartialUserRow, UserRow};

#[async_trait]
pub trait UserQueries: CoveDBImpl {

    async fn create_user(&self, user_row: UserRow) -> Result<QueryResult<UserRow>, CoveDbError> {
        let mut query_builder = BindQueryBuilder::new();
        user_row.insert().encode(&mut query_builder)?;

        let query = query_builder.to_query();
        let query = user_row.bind(query)?;

        let res = self.run_query::<PgQueryResult>(query.sql_query).await?;

        Ok(QueryResult::new(user_row, Some(res)))
    }

    async fn get_user_by_name_and_discrim(&self, name: impl Into<String> + Send, discriminator: impl Into<String> + Send) -> Result<PartialQueryResult<PartialUserRow>, CoveDbError> {
        let user_request_row = PartialUserRow {
            username: Some(name.into()),
            discriminator: Some(discriminator.into()),
            ..Default::default()
        };

        let mut query_builder = BindQueryBuilder::new();
        user_request_row.select(vec!["id", "username", "discriminator"]).encode(&mut query_builder)?;
        let sql_where = user_request_row.where_all();
        sql_where.encode(&mut query_builder)?;

        let query = user_request_row.bind(sql_where, query_builder.to_query())?;

        let out_partial_row: <UserRow as TableRow>::PartialRow = self.get_pool().fetch_one(query.sql_query).await?.into();

        Ok(PartialQueryResult::new(out_partial_row, None))
    }

    async fn get_user_by_id(&self, user_id: SnowflakeID) -> Result<PartialQueryResult<PartialUserRow>, CoveDbError> {
        let user_request_row = PartialUserRow {
            id: Some(user_id),
            ..Default::default()
        };

        let mut query_builder = BindQueryBuilder::new();
        user_request_row.select(vec!["id", "username", "discriminator"]).encode(&mut query_builder)?;
        let sql_where = user_request_row.where_all();
        sql_where.encode(&mut query_builder)?;

        let query = user_request_row.bind(sql_where, query_builder.to_query())?;

        let out_partial_row: <UserRow as TableRow>::PartialRow = self.get_pool().fetch_one(query.sql_query).await?.into();

        Ok(PartialQueryResult::new(out_partial_row, None))
    }

    async fn delete_user_by_id(&self, user_id: SnowflakeID) -> Result<QueryResult<UserRow>, CoveDbError> {
        let user_delete_row = PartialUserRow {
            id: Some(user_id),
            ..Default::default()
        };

        let mut query_builder = BindQueryBuilder::new();
        user_delete_row.select(vec!["*"]).encode(&mut query_builder)?;
        let sql_where = user_delete_row.where_all();
        sql_where.encode(&mut query_builder)?;
        let query = user_delete_row.bind(sql_where, query_builder.to_query())?;

        let out_val: UserRow = self.get_pool().fetch_one(query.sql_query).await?.try_into()?;

        let mut query_builder = BindQueryBuilder::new();

        user_delete_row.delete().encode(&mut query_builder)?;
        let sql_where = user_delete_row.where_all();
        sql_where.encode(&mut query_builder)?;

        let query = user_delete_row.bind(sql_where, query_builder.to_query())?;

        let res = self.run_query::<PgQueryResult>(query.sql_query).await?;

        Ok(QueryResult::new(out_val, Some(res)))
    }
}

#[async_trait]
impl UserQueries for CoveDB {}