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// Copyright (c) 2015-2016 lcov-parser developers
//
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT
// license <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. All files in the project carrying such notice may not be copied,
// modified, or distributed except according to those terms.

#[macro_export]
macro_rules! impl_summary {
    ($dest:ty, $field:ident<$key:ty, $value:ty>) => {
        impl $crate::report::summary::Summary<$key, $value> for $dest {
            fn iter(&self) -> ::std::collections::btree_map::Iter<$key, $value> {
                self.$field.iter()
            }
            fn contains_key(&self, key: &$key) -> bool {
                self.$field.contains_key(key)
            }
            fn get(&self, key: &$key) -> Option<&$value> {
                self.$field.get(key)
            }
            fn len(&self) -> usize {
                self.$field.len()
            }
        }
    }
}

#[macro_export]
macro_rules! impl_try_merge_self_summary {
    ($dest:ty:$field:ident, $err:ty) => {
        impl<'a> $crate::merger::ops::TryMerge<&'a $dest> for $dest {
            type Err = $err;

            fn try_merge(&mut self, other: &'a $dest) -> MergeResult<Self::Err> {
                for (key, other_value) in other.iter() {
                    if !self.$field.contains_key(key) {
                        self.$field.insert(key.clone(), other_value.clone());
                        continue;
                    }
                    let value = self.$field.get_mut(key).unwrap();
                    let _ = value.try_merge(other_value)?;
                }
                Ok(())
            }
        }
    }
}

#[macro_export]
macro_rules! impl_try_merge {
    ($dest:ty:$field:ident, $append:ty, $err:ty) => {
        impl<'a> $crate::merger::ops::TryMerge<&'a $append> for $dest {
            type Err = $err;

            fn try_merge(&mut self, data: &'a $append) -> MergeResult<Self::Err> {
                self.$field.try_merge(data)
            }
        }
    };
}

#[macro_export]
macro_rules! impl_from_error {
    ($from:ty, $dest:ident::$item:ident) => {
        impl ::std::convert::From<$from> for $dest {
            fn from(error: $from) -> Self {
                $dest::$item(error)
            }
        }
    };
    ($from:ty, $nest_dest:ident::$nest_item:ident=>$dest:ident::$item:ident) => {
        impl From<$from> for MergeError {
            fn from(error: $from) -> Self {
                $dest::$item($nest_dest::$nest_item(error))
            }
        }
    }
}