// SPDX-FileCopyrightText: 2024 Simon Bruder <simon@sbruder.de>
//
// SPDX-License-Identifier: AGPL-3.0-or-later

use std::fmt;

use diesel::prelude::*;
use diesel_derive_enum::DbEnum;
use serde::{Deserialize, Serialize};
use uuid::Uuid;

use crate::schema::*;

#[derive(Clone, Debug, Queryable, Selectable, Insertable, Serialize)]
#[diesel(table_name = items)]
#[diesel(check_for_backend(diesel::pg::Pg))]
pub struct Item {
    pub id: Uuid,
    pub name: Option<String>,
    pub parent: Option<Uuid>,
    pub class: Uuid,
}

#[derive(Debug, Insertable, Deserialize, AsChangeset)]
#[diesel(table_name = items)]
#[diesel(check_for_backend(diesel::pg::Pg))]
#[diesel(treat_none_as_null = true)]
pub struct NewItem {
    #[serde(default)]
    pub name: Option<String>,
    #[serde(default)]
    pub parent: Option<Uuid>,
    pub class: Uuid,
}

#[derive(Clone, Debug, DbEnum, PartialEq, Deserialize, Serialize)]
#[ExistingTypePath = "sql_types::ItemClassType"]
#[serde(rename_all = "snake_case")]
pub enum ItemClassType {
    Generic,
    Specific,
}

impl ItemClassType {
    pub const VARIANTS: [ItemClassType; 2] = [Self::Generic, Self::Specific];
}

impl fmt::Display for ItemClassType {
    // FIXME: currently, the HTML form relies on this matching the serde serializsation.
    // This should not be the case.
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::Generic => write!(f, "generic"),
            Self::Specific => write!(f, "specific"),
        }
    }
}

#[derive(Clone, Debug, Queryable, Selectable, Insertable, Serialize)]
#[diesel(table_name = item_classes)]
#[diesel(check_for_backend(diesel::pg::Pg))]
pub struct ItemClass {
    pub id: Uuid,
    pub name: String,
    pub r#type: ItemClassType,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub parent: Option<Uuid>,
}

#[derive(Debug, Insertable, Deserialize, AsChangeset)]
#[diesel(table_name = item_classes)]
#[diesel(check_for_backend(diesel::pg::Pg))]
pub struct NewItemClass {
    pub name: String,
    pub r#type: ItemClassType,
    #[serde(default)]
    pub parent: Option<Uuid>,
}