/*
    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
    Copyright (C) 2026 metamuffin <metamuffin.org>
*/

use crate::{Object, Registry, types::*};
use serde_json::{Map, Value};

pub fn object_to_json(reg: &Registry, ob: Object<'_>) -> Value {
    let mut o = Map::new();
    let mut nonexhaustive = false;
    for (i, tag) in ob.keys().enumerate() {
        let Some(info) = reg.info(tag) else {
            nonexhaustive = true;
            continue;
        };
        let Some(ty) = info.r#type else {
            nonexhaustive = true;
            continue;
        };
        let key = info.name.to_string();

        match ty {
            x if x == STR => {
                let val = ob.get_typed::<&str>(i).unwrap().to_string().into();
                multi_insert(&mut o, key, val);
            }
            x if x == OBJECT => {
                let val = object_to_json(reg, ob.get_typed::<Object>(i).unwrap());
                multi_insert(&mut o, key, val);
            }
            x if x == U32 => {
                let val = ob.get_typed::<u32>(i).unwrap().into();
                multi_insert(&mut o, key, val);
            }
            x if x == U64 => {
                let val = ob.get_typed::<u64>(i).unwrap().into();
                multi_insert(&mut o, key, val);
            }
            x if x == F64 => {
                let val = ob.get_typed::<f64>(i).unwrap().into();
                multi_insert(&mut o, key, val);
            }
            _ => {
                nonexhaustive = true;
            }
        };
    }
    if nonexhaustive {
        o.insert("_nonexhaustive".to_owned(), Value::Bool(true));
    }

    Value::Object(o)
}

fn multi_insert(m: &mut Map<String, Value>, key: String, val: Value) {
    if let Some(cur) = m.get_mut(&key) {
        if let Some(cur) = cur.as_array_mut() {
            cur.push(val);
        } else {
            *cur = Value::Array(vec![cur.clone(), val])
        }
    } else {
        m.insert(key, val);
    }
}