use serde::{Deserialize, Serialize};

pub type HandleId = u32;
pub type AssetId = i32;

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Deserialize, Serialize)]
#[allow(non_camel_case_types)]
pub enum BankType {
    TILES,
    SOUNDS,
    // TILEMAPS,
    // BLOBS,
}

#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct AssetEntry {
    pub asset_id: AssetId,
    pub asset_name: String,
    pub bank_type: BankType,
    pub offset: u64,
    pub size: u64,
    pub decoded_size: u64,
    pub codec: String, // e.g., "NONE" (legacy alias: "RAW")
    pub metadata: serde_json::Value,
}

#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct PreloadEntry {
    pub asset_id: AssetId,
    pub slot: usize,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
#[repr(i32)]
pub enum LoadStatus {
    PENDING = 0,
    LOADING = 1,
    READY = 2,
    COMMITTED = 3,
    CANCELED = 4,
    ERROR = 5,
    UnknownHandle = 6,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
#[repr(i32)]
pub enum AssetLoadError {
    AssetNotFound = 3,
    SlotKindMismatch = 4,
    SlotIndexInvalid = 5,
    BackendError = 6,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
#[repr(i32)]
pub enum AssetOpStatus {
    Ok = 0,
    UnknownHandle = 1,
    InvalidState = 2,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct BankStats {
    pub total_bytes: usize,
    pub used_bytes: usize,
    pub free_bytes: usize,
    pub inflight_bytes: usize,
    pub slot_count: usize,
    pub slots_occupied: usize,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SlotStats {
    pub asset_id: Option<AssetId>,
    pub asset_name: Option<String>,
    pub generation: u32,
    pub resident_bytes: usize,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct SlotRef {
    pub asset_type: BankType,
    pub index: usize,
}

impl SlotRef {
    pub fn gfx(index: usize) -> Self {
        Self { asset_type: BankType::TILES, index }
    }

    pub fn audio(index: usize) -> Self {
        Self { asset_type: BankType::SOUNDS, index }
    }
}