use chrono::prelude::*;

pub struct User {
    pub id: i64,
    pub email: String,
}

pub struct UserLoginInfo {
    pub last_login_datetime: DateTime<Utc>,
    pub ip: String,
    pub user_agent: String,
}

pub struct Recipe {
    pub id: i64,
    pub user_id: i64,
    pub title: String,
    pub description: String,
    pub estimate_time: Option<i32>, // [min].
    pub difficulty: Difficulty,

    //ingredients: Vec<Ingredient>, // For four people.
    pub process: Vec<Group>,
}

impl Recipe {
    pub fn empty(id: i64, user_id: i64) -> Recipe {
        Self::new(id, user_id, String::new(), String::new())
    }

    pub fn new(id: i64, user_id: i64, title: String, description: String) -> Recipe {
        Recipe {
            id,
            user_id,
            title,
            description,
            estimate_time: None,
            difficulty: Difficulty::Unknown,
            process: Vec::new(),
        }
    }
}

pub struct Ingredient {
    pub quantity: Option<Quantity>,
    pub name: String,
}

pub struct Quantity {
    pub value: f32,
    pub unit: String,
}

pub struct Group {
    pub name: Option<String>,
    pub input: Vec<StepInput>,
    pub output: Vec<IntermediateSubstance>,
    pub steps: Vec<Step>,
}

pub struct Step {
    pub action: String,
}

pub struct IntermediateSubstance {
    pub name: String,
    pub quantity: Option<Quantity>,
}

pub enum StepInput {
    Ingredient(Ingredient),
    IntermediateSubstance(IntermediateSubstance),
}

pub enum Difficulty {
    Unknown,
    Easy,
    Medium,
    Hard,
}