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use error::*;
use serialization::DynamicEventMapperSerde;
use std::collections::HashMap;

pub struct DynamicEventMapper {
    dynamic_event_map: Vec<Option<HashMap<String, usize>>>,
}

impl DynamicEventMapper {
    pub fn new(
        dynamic_event_map: Vec<Option<HashMap<String, usize>>>,
    ) -> Self {
        DynamicEventMapper {
            dynamic_event_map: dynamic_event_map,
        }
    }

    pub fn get_id<TStr>(&self, module_id: usize, dynamic_event_name: TStr) -> Result<usize>
        where TStr: AsRef<str> {
        let dynamic_event_name = dynamic_event_name.as_ref();
        match self.dynamic_event_map.get(module_id) {
            Some(&Some(ref some)) => {
                match some.get(dynamic_event_name) {
                    Some(some) => Ok(some.clone()),
                    None => Err(ErrorKind::DynamicEventNotFoundInMap(module_id, dynamic_event_name.to_string()).into())
                }
            },
            None | Some(&None) => Err(ErrorKind::DynamicEventNotFoundInMap(module_id, dynamic_event_name.to_string()).into()),
        }
    }

    pub fn get_raw_map(&self) -> &Vec<Option<HashMap<String, usize>>> {
        &self.dynamic_event_map
    }

    pub fn make_serde(&self) -> DynamicEventMapperSerde {
        DynamicEventMapperSerde::new(&self.dynamic_event_map)
    }
}