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//! Edgedb-query crate aims to provide a bunch of traits or structs used
//! by Edgedb-query-derive crate

pub mod queries;
pub mod models;

pub use models::edge_query::EdgeQuery;
pub use models::edge_query::ToEdgeQuery;
pub use models::query_result::BasicResult;
pub use queries::filter::Filter;
pub use queries::select::Options;
pub use queries::select::SelectOptions;
pub use queries::select::OrderDir;
pub use queries::select::OrderOptions;
pub use queries::select::PageOptions;

use edgedb_protocol::model::Uuid;
use edgedb_protocol::value::Value;



macro_rules! _to_edgeql_and_to_edge_scalar_impls {
    ($($ty: ty => { scalar: $scalar: expr }),* $(,)?) => {
        $(
            impl ToEdgeQl for $ty {
                fn to_edgeql(&self) -> String {
                    self.to_string()
                }
            }
            impl ToEdgeScalar for $ty {
                fn scalar() -> String {
                    $scalar.to_owned()
                }
            }

            impl ToEdgeShape for $ty {
                fn shape() -> String {
                    String::default()
                }
            }
        )*
    }
}


pub trait ToEdgeQl {
    /// Transform a struct into a edgeDB query language statment
    fn to_edgeql(&self) -> String;
}

pub trait ToEdgeScalar {
    /// returns the cast expression corresponding to the self struct
    fn scalar() -> String;
}

pub trait ToEdgeShape {
    fn shape() -> String;
}

pub trait ToEdgeValue {
    /// Transform a struct data into a edgedb_protocol::value::Value
    fn to_edge_value(&self) -> Value;
}

_to_edgeql_and_to_edge_scalar_impls!(
    String => { scalar: "<str>" },
    i8 => { scalar: "<int16>" },
    i16 => { scalar: "<int16>" },
    i32 => { scalar: "<int32>" },
    i64 => { scalar: "<int64>" },
    f32 => { scalar: "<float32>" },
    f64 => { scalar: "<float64>" },
    bool => { scalar: "<bool>" },
    serde_json::Value => { scalar: "<json>" },
    uuid::Uuid => { scalar:"<uuid>"},
    chrono::DateTime<chrono::Utc> => { scalar: "<datetime>"},
    chrono::DateTime<chrono::Local> => { scalar: "<cal::local_datetime>"},
    chrono::Duration => { scalar : "<duration>"},
    chrono::Date<chrono::Local> => { scalar: "<cal::local_date>"},
    chrono::NaiveTime => { scalar: "<cal::local_time>"},
    chrono::NaiveDate => { scalar: "<cal::local_date>"},
);

impl ToEdgeScalar for () {
    fn scalar() -> String {
        "".to_owned()
    }
}

impl<T: ToEdgeQl> ToEdgeQl for Vec<T> {
    fn to_edgeql(&self) -> String {
        let s = self
            .iter()
            .map(|s| s.to_edgeql())
            .collect::<Vec<String>>()
            .join(",");
        format!("[{}]", s)
    }
}

impl<T: ToEdgeScalar + Default> ToEdgeScalar for Vec<T> {
    fn scalar() -> String {
        format!("<array{}>", T::scalar())
    }
}

impl<T> ToEdgeShape for Vec<T> {
    fn shape() -> String {
        String::default()
    }
}

impl ToEdgeValue for () {
    fn to_edge_value(&self) -> Value {
        Value::Str("".to_string())
    }
}

impl ToEdgeValue for String {
    fn to_edge_value(&self) -> Value {
        Value::Str(self.to_string())
    }
}

impl ToEdgeValue for i8 {
    fn to_edge_value(&self) -> Value {
        Value::Int16(*self as i16)
    }
}

impl ToEdgeValue for i16 {
    fn to_edge_value(&self) -> Value {
        Value::Int16(*self)
    }
}

impl ToEdgeValue for i32 {
    fn to_edge_value(&self) -> Value {
        Value::Int32(*self)
    }
}

impl ToEdgeValue for i64 {
    fn to_edge_value(&self) -> Value {
        Value::Int64(*self)
    }
}

impl ToEdgeValue for f32 {
    fn to_edge_value(&self) -> Value {
        Value::Float32(*self)
    }
}

impl ToEdgeValue for f64 {
    fn to_edge_value(&self) -> Value {
        Value::Float64(*self)
    }
}

impl ToEdgeValue for bool {
    fn to_edge_value(&self) -> Value {
        Value::Bool(*self)
    }
}

impl<T: ToEdgeValue> ToEdgeValue for Vec<T> {
    fn to_edge_value(&self) -> Value {
        Value::Array(
            self.iter()
                .map(|t| t.to_edge_value())
                .collect::<Vec<Value>>(),
        )
    }
}

impl ToEdgeValue for serde_json::Value {
    fn to_edge_value(&self) -> Value {
        Value::Json(self.to_string())
    }
}

impl ToEdgeValue for Uuid {
    fn to_edge_value(&self) -> Value {
        Value::Uuid(Uuid::from_u128(self.as_u128()))
    }
}