use std::collections::HashMap;

use chrono::{Utc, Datelike};
use log::error;
use rocket_dyn_templates::tera::{Value, Error};
use ovlach_data::cv::chrono::from_string;

// TODO: tenhle modul je trochu prasacky..

pub fn static_filter(
    value: &Value,
    args: &HashMap<String, rocket_dyn_templates::tera::Value>
) -> Result<Value, Error> {
    let host = args.get("static_host");
    return Ok(rocket_dyn_templates::tera::Value::String(format!("{}/{}", host.unwrap().as_str().unwrap(), value.as_str().unwrap()))); // TODO: fix-me here!
}

pub fn translate_filter(
    value: &Value,
    args: &HashMap<String, rocket_dyn_templates::tera::Value>
) -> Result<Value, Error> {
    return Ok(rocket_dyn_templates::tera::Value::String(format!("{}", value.as_str().unwrap()))); // TODO: fix-me here!
}

pub fn insert_space_every(
        value: &Value,
        args: &HashMap<String, rocket_dyn_templates::tera::Value>
) -> Result<Value, Error> {
    let mut input = value.as_u64().unwrap().to_string();
    let times = args.get("times").unwrap().as_u64().unwrap();
    let mut result = String::new();
    
    for (index, ch) in input.chars().enumerate() {
        if index > 0 && index as u64 % times == 0 {
            result.push(' ');
        }
        result.push(ch);
    }

    Ok(rocket_dyn_templates::tera::Value::String(result))
}

pub fn calculate_age(
    value: &Value,
    args: &HashMap<String, rocket_dyn_templates::tera::Value>
) -> Result<Value, Error> {
    error!("{:?}", value.as_str());
    //let s = value.to_string().trim_matches('"'); // TODO: unwrap here!
    let value =  from_string(value.as_str().unwrap().into());
    match value {
        Ok(value) => {
            let current_date = Utc::now().naive_utc().date();
            let mut age = current_date.year() - value.year();
        
            // Adjust age if the birthday hasn't occurred yet this year
            age = if current_date.month() < value.month() || 
               (current_date.month() == value.month() && current_date.day() < value.day()) {
                age - 1
            } else {
                age
            };

            Ok(rocket_dyn_templates::tera::Value::String(age.to_string()))
        }
        Err(e) => panic!("Can't parse date: {}", e)
    }
}