//! 战斗领域模型。
//!
//! 本文件只承载战斗聚合内部状态和值对象；背包奖励、成长记账和任务联动由
//! SpacetimeDB 事务 adapter 编排，不在战斗领域内直连其他上下文。

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

/// 战斗状态 ID 的稳定前缀，由领域层统一持有，避免应用层重复拼接规则。
pub const BATTLE_STATE_ID_PREFIX: &str = "battle_";
/// 新建战斗状态的初始版本号，用于乐观更新和快照投影。
pub const INITIAL_BATTLE_VERSION: u32 = 1;
/// 普通战斗中敌方反击伤害占玩家输出的比例。
pub const BASIC_FIGHT_COUNTER_RATIO: f32 = 0.14;
/// 普通战斗中敌方反击的最低伤害，保证战斗有稳定消耗。
pub const MIN_FIGHT_COUNTER_DAMAGE: i32 = 4;
/// 切磋模式保底生命值，避免非生死战把玩家扣到 0。
pub const SPAR_MIN_HP: i32 = 1;

/// 旧版战斗动作 function id 白名单，仍由结算规则用于识别攻击类动作。
pub(crate) const LEGACY_ATTACK_FUNCTION_IDS: [&str; 5] = [
    "battle_all_in_crush",
    "battle_guard_break",
    "battle_probe_pressure",
    "battle_feint_step",
    "battle_finisher_window",
];

/// 战斗模式，决定结算时是否允许击败玩家。
#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum BattleMode {
    Fight,
    Spar,
}

impl BattleMode {
    pub fn as_str(&self) -> &'static str {
        match self {
            Self::Fight => "fight",
            Self::Spar => "spar",
        }
    }
}

/// 战斗状态，用于标记战斗是否仍可继续接收行动。
#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum BattleStatus {
    Ongoing,
    Resolved,
    Aborted,
}

impl BattleStatus {
    pub fn as_str(&self) -> &'static str {
        match self {
            Self::Ongoing => "ongoing",
            Self::Resolved => "resolved",
            Self::Aborted => "aborted",
        }
    }
}

/// 单次战斗行动结算后的领域结果。
#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum CombatOutcome {
    Ongoing,
    Victory,
    SparComplete,
    Escaped,
}

impl CombatOutcome {
    pub fn as_str(&self) -> &'static str {
        match self {
            Self::Ongoing => "ongoing",
            Self::Victory => "victory",
            Self::SparComplete => "spar_complete",
            Self::Escaped => "escaped",
        }
    }
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct BattleStateSnapshot {
    pub battle_state_id: String,
    pub story_session_id: String,
    pub runtime_session_id: String,
    pub actor_user_id: String,
    pub chapter_id: Option<String>,
    pub target_npc_id: String,
    pub target_name: String,
    pub battle_mode: BattleMode,
    pub status: BattleStatus,
    pub player_hp: i32,
    pub player_max_hp: i32,
    pub player_mana: i32,
    pub player_max_mana: i32,
    pub target_hp: i32,
    pub target_max_hp: i32,
    pub experience_reward: u32,
    pub reward_items: Vec<RuntimeItemRewardItemSnapshot>,
    pub turn_index: u32,
    pub last_action_function_id: Option<String>,
    pub last_action_text: Option<String>,
    pub last_result_text: Option<String>,
    pub last_damage_dealt: i32,
    pub last_damage_taken: i32,
    pub last_outcome: CombatOutcome,
    pub version: u32,
    pub created_at_micros: i64,
    pub updated_at_micros: i64,
}