//! 背包领域模型。
//!
//! 本文件只承载背包槽、装备槽、堆叠和物品来源等稳定值对象；
//! SpacetimeDB 表查询写回由 adapter 处理。

use serde::{Deserialize, Serialize};
use shared_kernel::build_prefixed_seed_id;
#[cfg(feature = "spacetime-types")]
use spacetimedb::SpacetimeType;

pub const INVENTORY_SLOT_ID_PREFIX: &str = "invslot_";
pub const INVENTORY_MUTATION_ID_PREFIX: &str = "invmut_";

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum InventoryContainerKind {
    Backpack,
    Equipment,
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum InventoryItemRarity {
    Common,
    Uncommon,
    Rare,
    Epic,
    Legendary,
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum InventoryEquipmentSlot {
    Weapon,
    Armor,
    Relic,
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum InventoryItemSourceKind {
    StoryReward,
    QuestReward,
    TreasureReward,
    NpcGift,
    NpcTrade,
    CombatDrop,
    ForgeCraft,
    ForgeReforge,
    ManualPatch,
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct InventoryItemSnapshot {
    pub item_id: String,
    pub category: String,
    pub name: String,
    pub description: Option<String>,
    pub quantity: u32,
    pub rarity: InventoryItemRarity,
    pub tags: Vec<String>,
    pub stackable: bool,
    pub stack_key: String,
    pub equipment_slot_id: Option<InventoryEquipmentSlot>,
    pub source_kind: InventoryItemSourceKind,
    pub source_reference_id: Option<String>,
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct InventorySlotSnapshot {
    pub slot_id: String,
    pub runtime_session_id: String,
    pub story_session_id: Option<String>,
    pub actor_user_id: String,
    pub container_kind: InventoryContainerKind,
    pub slot_key: String,
    pub item_id: String,
    pub category: String,
    pub name: String,
    pub description: Option<String>,
    pub quantity: u32,
    pub rarity: InventoryItemRarity,
    pub tags: Vec<String>,
    pub stackable: bool,
    pub stack_key: String,
    pub equipment_slot_id: Option<InventoryEquipmentSlot>,
    pub source_kind: InventoryItemSourceKind,
    pub source_reference_id: Option<String>,
    pub created_at_micros: i64,
    pub updated_at_micros: i64,
}

impl InventoryEquipmentSlot {
    pub fn as_str(self) -> &'static str {
        match self {
            Self::Weapon => "weapon",
            Self::Armor => "armor",
            Self::Relic => "relic",
        }
    }
}

pub fn generate_inventory_slot_id(seed_micros: i64) -> String {
    build_prefixed_seed_id(INVENTORY_SLOT_ID_PREFIX, seed_micros)
}

pub fn generate_inventory_mutation_id(seed_micros: i64) -> String {
    build_prefixed_seed_id(INVENTORY_MUTATION_ID_PREFIX, seed_micros)
}