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use std::error::Error;
use std::io::Write;

use sqlite::{Sqlite, SqliteType};
use sqlite::connection::SqliteValue;
use types::{self, FromSql, ToSql, IsNull, HasSqlType};

impl HasSqlType<types::Date> for Sqlite {
    fn metadata() -> SqliteType {
        SqliteType::Text
    }
}

impl HasSqlType<types::Time> for Sqlite {
    fn metadata() -> SqliteType {
        SqliteType::Text
    }
}

impl HasSqlType<types::Timestamp> for Sqlite {
    fn metadata() -> SqliteType {
        SqliteType::Text
    }
}

queryable_impls! {
    Date -> String,
    Time -> String,
    Timestamp -> String,
}

expression_impls! {
    Date -> String,
    Date -> &'a str,
    Time -> String,
    Time -> &'a str,
    Timestamp -> String,
    Timestamp -> &'a str,
}

impl FromSql<types::Date, Sqlite> for String {
    fn from_sql(value: Option<&SqliteValue>) -> Result<Self, Box<Error+Send+Sync>> {
        FromSql::<types::Text, Sqlite>::from_sql(value)
    }
}

impl<'a> ToSql<types::Date, Sqlite> for &'a str {
    fn to_sql<W: Write>(&self, out: &mut W) -> Result<IsNull, Box<Error+Send+Sync>> {
        ToSql::<types::Text, Sqlite>::to_sql(self, out)
    }
}

impl ToSql<types::Date, Sqlite> for String {
    fn to_sql<W: Write>(&self, out: &mut W) -> Result<IsNull, Box<Error+Send+Sync>> {
        <&str as ToSql<types::Date, Sqlite>>::to_sql(&&**self, out)
    }
}

impl FromSql<types::Time, Sqlite> for String {
    fn from_sql(value: Option<&SqliteValue>) -> Result<Self, Box<Error+Send+Sync>> {
        FromSql::<types::Text, Sqlite>::from_sql(value)
    }
}

impl<'a> ToSql<types::Time, Sqlite> for &'a str {
    fn to_sql<W: Write>(&self, out: &mut W) -> Result<IsNull, Box<Error+Send+Sync>> {
        ToSql::<types::Text, Sqlite>::to_sql(self, out)
    }
}

impl ToSql<types::Time, Sqlite> for String {
    fn to_sql<W: Write>(&self, out: &mut W) -> Result<IsNull, Box<Error+Send+Sync>> {
        <&str as ToSql<types::Time, Sqlite>>::to_sql(&&**self, out)
    }
}

impl FromSql<types::Timestamp, Sqlite> for String {
    fn from_sql(value: Option<&SqliteValue>) -> Result<Self, Box<Error+Send+Sync>> {
        FromSql::<types::Text, Sqlite>::from_sql(value)
    }
}

impl<'a> ToSql<types::Timestamp, Sqlite> for &'a str {
    fn to_sql<W: Write>(&self, out: &mut W) -> Result<IsNull, Box<Error+Send+Sync>> {
        ToSql::<types::Text, Sqlite>::to_sql(self, out)
    }
}

impl ToSql<types::Timestamp, Sqlite> for String {
    fn to_sql<W: Write>(&self, out: &mut W) -> Result<IsNull, Box<Error+Send+Sync>> {
        <&str as ToSql<types::Timestamp, Sqlite>>::to_sql(&&**self, out)
    }
}