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 rocket::http::uri::Uri;
use regex::Regex;
use chrono::{NaiveDate, Utc};
use chrono::Datelike;

/*
 * 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<'t> {
	transactions : Vec<&'t crate::banking::account::Transaction>,
	account_name : String,
	filter : String,
	date_start : String,
	date_end : String
}


#[get("/transactions/<account>?<start>&<end>&<filter>")]
pub fn transaction_handler(account : &RawStr, start : Option<&RawStr>, end : Option<&RawStr>,
			   filter : Option<&RawStr>) -> rocket_contrib::templates::Template {
	let account_name = account.to_string();
	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 tf_c = transaction_filter.clone();
	let filter_html_decoded = Uri::percent_decode_lossy(tf_c.as_bytes());
	let transaction_filter = filter_html_decoded.to_string();
	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(&account_name);
	let acc;
	match transactions {
	    Some(trans) => acc = trans,
	    None => panic!("could not read file")
	}
	let t = acc.transactions;
	// apply parameters

	// apply date filters
	let t_filtered = crate::web_frontend::util::apply_date_filter(t.clone(), date_start, date_end);
	// apply filter
	let ft = crate::web_frontend::util::apply_transaction_filter(&transaction_filter, &t_filtered);

	let context = TransactionContext { transactions: ft, account_name : account_name,
			filter : transaction_filter, date_start : date_start.to_string()[0..7].to_string(),
			date_end : date_end.to_string()[0..7].to_string()};

	Template::render("transaction", context)
}