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use std::collections::HashMap;
use std::convert::{TryFrom, TryInto};

use failure::Error;

use crate::bolt;
use crate::bolt::Value;
use crate::error::ValueError;

#[derive(Debug, Clone, Eq, PartialEq)]
pub struct Node {
    pub(crate) node_identity: i64,
    pub(crate) labels: Vec<Value>,
    pub(crate) properties: HashMap<String, Value>,
}

impl Node {
    pub fn new(
        node_identity: i64,
        labels: Vec<impl Into<Value>>,
        properties: HashMap<String, impl Into<Value>>,
    ) -> Self {
        Self {
            node_identity,
            labels: labels.into_iter().map(|v| v.into()).collect(),
            properties: properties.into_iter().map(|(k, v)| (k, v.into())).collect(),
        }
    }
}

impl TryFrom<bolt::value::Node> for Node {
    type Error = Error;

    fn try_from(bolt_node: bolt::value::Node) -> Result<Self, Self::Error> {
        Ok(Node {
            node_identity: i64::try_from(*bolt_node.node_identity)?,
            labels: (*bolt_node.labels).try_into()?,
            properties: (*bolt_node.properties).try_into()?,
        })
    }
}

impl TryFrom<Value> for Node {
    type Error = Error;

    fn try_from(value: Value) -> Result<Self, Self::Error> {
        match value {
            Value::Node(node) => Ok(Node::try_from(node)?),
            _ => Err(ValueError::InvalidConversion(value).into()),
        }
    }
}