use maj::{gemini, server::Error, Response};
use rand::seq::SliceRandom;
use rand::{thread_rng, Rng};
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize, Clone, Debug)]
struct Card {
    name: String,
    name_short: String,
    #[serde(rename = "value_int")]
    value: u16,
    meaning_up: String,
    meaning_rev: String,
    meaning: Option<String>,
    #[serde(rename = "type")]
    kind: String,
    #[serde(default)]
    upright: bool,
}

struct Deck {
    cards: Vec<Card>,
}

#[derive(Serialize, Deserialize, Clone, Debug)]
struct Container {
    count: u32,
    cards: Vec<Card>,
}

impl Deck {
    fn new() -> Result<Self, serde_json::Error> {
        let ctr: Container = serde_json::from_str(include_str!("./tarot.json"))?;
        let mut deck = ctr.cards;

        deck.shuffle(&mut thread_rng());

        Ok(Deck { cards: deck })
    }

    fn draw(&mut self) -> Card {
        let face = thread_rng().gen::<u8>() % 2;
        let mut card = self.cards.pop().unwrap();
        card.upright = face == 0;

        if !card.upright {
            card.name = format!("{} (reversed)", card.name);
            card.meaning = Some(card.meaning_rev.clone());
        } else {
            card.meaning = Some(card.meaning_up.clone());
        }

        card
    }
}

pub async fn character() -> Result<Response, Error> {
    let mut d = Deck::new()?;
    let history = d.draw();
    let recent = d.draw();
    let current = d.draw();

    let b = gemini::Builder::new()
        .heading(1, "RPG Character Backstory Generator")
        .text("Stuck coming up with a plausible backstory for a character? Try this generator out. Each of these categories lists a series of descriptors describing various stages of the character's life: their life history, some recent major event in their life and their current state/mood. This should be all you need to flesh out a believeable NPC's dialogue.")
        .text("")
        .heading(2, "Background / History")
        .text(format!("{}: {}", history.name, history.meaning.unwrap()))
        .text("")
        .heading(2, "Recent Events")
        .text(format!("{}: {}", recent.name, recent.meaning.unwrap()))
        .text("")
        .heading(2, "Current Situation")
        .text(format!("{}: {}", current.name, current.meaning.unwrap()))
        .text("")
        .link(
            "/tools/character_gen",
            Some("Make a new character".to_string()),
        );

    Ok(Response::render(b.build()))
}