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//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015-2018 Matthias Beyer <mail@beyermatthias.de> and contributors
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; version
// 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//

use toml::Value;
use toml_query::insert::TomlValueInsertExt;
use chrono::naive::NaiveDateTime as NDT;
use failure::Fallible as Result;
use failure::Error;

use constants::*;
use iter::storeid::TagStoreIdIter;
use iter::setendtime::SetEndTimeIter;

use libimagstore::store::FileLockEntry;
use libimagstore::store::Store;

pub struct CreateTimeTrackIter<'a> {
    inner: TagStoreIdIter,
    store: &'a Store,
}

impl<'a> CreateTimeTrackIter<'a>
{
    pub fn new(inner: TagStoreIdIter, store: &'a Store) -> CreateTimeTrackIter<'a> {
        CreateTimeTrackIter {
            inner: inner,
            store: store,
        }
    }

    pub fn set_end_time(self, datetime: NDT) -> SetEndTimeIter<'a> {
        SetEndTimeIter::new(self, datetime)
    }
}

impl<'a> Iterator for CreateTimeTrackIter<'a>
{
    type Item = Result<FileLockEntry<'a>>;

    fn next(&mut self) -> Option<Self::Item> {
        self.inner
            .next()
            .map(|res| {
                res.and_then(|(id, starttime)| {
                    self.store
                        .create(id)
                        .map_err(Error::from)
                        .and_then(|mut entry| {
                            let v = Value::String(starttime.format(DATE_TIME_FORMAT).to_string());
                            let _ = entry.get_header_mut().insert(DATE_TIME_START_HEADER_PATH, v)?;
                            Ok(entry)
                        })
                })
            })
    }

}