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use crate::conversion::{BorrowFromGValue, FromGValue};
use crate::structure::{Edge, Path, Property, Vertex, VertexProperty};
use crate::GremlinResult;
use chrono;
use std::collections::{HashMap, VecDeque};

pub type Map = HashMap<String, GValue>;
pub type List = Vec<GValue>;
pub type Set = Vec<GValue>;
pub type Date = chrono::DateTime<chrono::offset::Utc>;

/// Represent possible values coming from the [Gremlin Server](http://tinkerpop.apache.org/docs/3.4.0/dev/io/)
#[allow(clippy::large_enum_variant)]
#[derive(Debug, PartialEq, Clone)]
pub enum GValue {
    Vertex(Vertex),
    Edge(Edge),
    VertexProperty(VertexProperty),
    Property(Property),
    Uuid(uuid::Uuid),
    Int32(i32),
    Int64(i64),
    Float(f32),
    Double(f64),
    Date(Date),
    List(List),
    Set(Set),
    Map(Map),
    String(String),
    Path(Path),
}

impl GValue {
    pub fn take<T>(self) -> GremlinResult<T>
    where
        T: FromGValue,
    {
        T::from_gvalue(self)
    }

    pub fn get<'a, T>(&'a self) -> GremlinResult<&'a T>
    where
        T: BorrowFromGValue,
    {
        T::from_gvalue(self)
    }
}

#[derive(Debug, PartialEq, Eq, Hash, Clone)]
pub enum GID {
    String(String),
    Int32(i32),
    Int64(i64),
}

impl From<&'static str> for GID {
    fn from(val: &str) -> Self {
        GID::String(String::from(val))
    }
}
impl From<i32> for GID {
    fn from(val: i32) -> Self {
        GID::Int32(val)
    }
}

impl From<i64> for GID {
    fn from(val: i64) -> Self {
        GID::Int64(val)
    }
}

impl From<Date> for GValue {
    fn from(val: Date) -> Self {
        GValue::Date(val)
    }
}

impl From<String> for GValue {
    fn from(val: String) -> Self {
        GValue::String(val)
    }
}

impl From<i32> for GValue {
    fn from(val: i32) -> Self {
        GValue::Int32(val)
    }
}

impl From<i64> for GValue {
    fn from(val: i64) -> Self {
        GValue::Int64(val)
    }
}

impl From<f32> for GValue {
    fn from(val: f32) -> Self {
        GValue::Float(val)
    }
}
impl From<f64> for GValue {
    fn from(val: f64) -> Self {
        GValue::Double(val)
    }
}

impl<'a> From<&'a str> for GValue {
    fn from(val: &'a str) -> Self {
        GValue::String(String::from(val))
    }
}

impl From<Vertex> for GValue {
    fn from(val: Vertex) -> Self {
        GValue::Vertex(val)
    }
}

impl From<Path> for GValue {
    fn from(val: Path) -> Self {
        GValue::Path(val)
    }
}
impl From<Edge> for GValue {
    fn from(val: Edge) -> Self {
        GValue::Edge(val)
    }
}

impl From<VertexProperty> for GValue {
    fn from(val: VertexProperty) -> Self {
        GValue::VertexProperty(val)
    }
}
impl From<Property> for GValue {
    fn from(val: Property) -> Self {
        GValue::Property(val)
    }
}

impl From<HashMap<String, GValue>> for GValue {
    fn from(val: HashMap<String, GValue>) -> Self {
        GValue::Map(val)
    }
}

impl From<Vec<GValue>> for GValue {
    fn from(val: Vec<GValue>) -> Self {
        GValue::List(val)
    }
}

impl From<GValue> for Vec<GValue> {
    fn from(val: GValue) -> Self {
        vec![val]
    }
}

impl From<GValue> for VecDeque<GValue> {
    fn from(val: GValue) -> Self {
        match val {
            GValue::List(l) => VecDeque::from(l),
            GValue::Set(l) => VecDeque::from(l),
            _ => VecDeque::from(vec![val]),
        }
    }
}