use parsers::csv::CsvFile;
use crate::banking::account::Account;
use crate::banking::asset::Asset;
//use parsers::ini::IniFile;
use std::collections::HashMap;
use rocket_contrib::templates::Template;
use rocket::response::NamedFile;
use std::path::{PathBuf, Path};
use rocket::request::Form;
use rocket::http::RawStr;
use regex::Regex;
use chrono::{NaiveDate, Utc};
use chrono::Datelike;

/*
   This files contains the code to handle the /transactions requests
*/

/*
 * This context is passed to the template rendering engine
 * If you modify this structure, adapt also the template to include the
 * changes!
 */
#[derive(Serialize)]
struct TransactionContext {
	transactions : Vec<crate::banking::account::Transaction>,
	account_name : String,
	filter : String,
	date_start : String,
	date_end : String
}

fn apply_transaction_filter(filter : String, transactions : Vec<crate::banking::account::Transaction>) -> Vec<crate::banking::account::Transaction> {
    let re = Regex::new(&filter).unwrap();
    let tmp = transactions.into_iter().filter(|transaction| re.is_match(&transaction.sender_name) || re.is_match(&transaction.reference) ).collect();
    tmp

}

#[get("/transactions?<start>&<end>&<filter>")]
pub fn transaction_handler(start : Option<&RawStr>, end : Option<&RawStr>,
			   filter : Option<&RawStr>) -> rocket_contrib::templates::Template {
	let date_start = match start {
		Some(s) => { let mut tmp = s.to_string();
			tmp.push_str("-01");
			chrono::NaiveDate::parse_from_str(&tmp, "%Y-%m-%d").unwrap() },
		None => Utc::today().naive_utc()
	};
	let date_end = match end {
		Some(s) => { let mut tmp = s.to_string();
			tmp.push_str("-01");
			chrono::NaiveDate::parse_from_str(&tmp, "%Y-%m-%d").unwrap() },
		None => Utc::today().naive_utc() 
	};
	let transaction_filter = match filter {
		Some(s) => s.to_string(),
		None => String::from("")
	};
	let asset_ini = "data/asset.ini";
	let asset : Asset = crate::banking::asset::Asset::from_ini_file(asset_ini);
    let transactions = asset.get_account_by_name("Girokonto");
    let acc;
    match transactions {
	    Some(trans) => acc = trans,
	    None => panic!("could not read file")
    }
    let t = acc.transactions;
    // apply parameters
    // apply date filters

    // apply filter
    let ft = apply_transaction_filter(transaction_filter, t);

    let context = TransactionContext { transactions: ft, account_name : String::from("Girokonto"),
    			filter : String::from(""), date_start : date_start.to_string()[0..7].to_string(),
    			date_end : date_end.to_string()[0..7].to_string()};
    Template::render("transaction", context)
}