//! 成长领域模型。
//!
//! 本文件只承载玩家等级、章节预算、自动定级和实体强度相关的稳定值对象；
//! 任务、战斗、NPC 等奖励来源通过应用服务输入和领域事件接入。

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

/// 玩家成长系统当前允许的最高等级。
pub const MAX_PLAYER_LEVEL: u32 = 20;
/// 根据章节数推导终局叙事等级时的默认上限。
pub const DEFAULT_TERMINAL_STORY_LEVEL: u32 = 15;
/// 根据章节数推导终局叙事等级时的最低上限。
pub const MIN_TERMINAL_STORY_LEVEL: u32 = 5;
/// 章节 pseudo level 曲线指数，保持与既有 Node 侧节奏一致。
pub const PSEUDO_LEVEL_CURVE_EXPONENT: f64 = 0.92;

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

impl PlayerProgressionGrantSource {
    pub fn as_str(&self) -> &'static str {
        match self {
            Self::Quest => "quest",
            Self::HostileNpc => "hostile_npc",
        }
    }
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum ChapterPaceBand {
    OpeningFast,
    Steady,
    Pressure,
    FinaleDense,
}

impl ChapterPaceBand {
    pub fn as_str(&self) -> &'static str {
        match self {
            Self::OpeningFast => "opening_fast",
            Self::Steady => "steady",
            Self::Pressure => "pressure",
            Self::FinaleDense => "finale_dense",
        }
    }
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum ProgressionRole {
    Guide,
    Ambient,
    Support,
    HostileStandard,
    HostileElite,
    HostileBoss,
    Rival,
}

impl ProgressionRole {
    pub fn as_str(&self) -> &'static str {
        match self {
            Self::Guide => "guide",
            Self::Ambient => "ambient",
            Self::Support => "support",
            Self::HostileStandard => "hostile_standard",
            Self::HostileElite => "hostile_elite",
            Self::HostileBoss => "hostile_boss",
            Self::Rival => "rival",
        }
    }
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub enum LevelProfileSource {
    ChapterAuto,
    PresetOverride,
    Manual,
}

impl LevelProfileSource {
    pub fn as_str(&self) -> &'static str {
        match self {
            Self::ChapterAuto => "chapter_auto",
            Self::PresetOverride => "preset_override",
            Self::Manual => "manual",
        }
    }
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
pub struct LevelBenchmark {
    pub level: u32,
    pub xp_to_next_level: u32,
    pub cumulative_xp_required: u32,
    pub reference_strength: u32,
    pub base_hp: u32,
    pub base_mana: u32,
    pub baseline_damage_scale: f32,
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct PlayerProgressionSnapshot {
    pub user_id: String,
    pub level: u32,
    pub current_level_xp: u32,
    pub total_xp: u32,
    pub xp_to_next_level: u32,
    pub pending_level_ups: u32,
    pub last_granted_source: Option<PlayerProgressionGrantSource>,
    pub created_at_micros: i64,
    pub updated_at_micros: i64,
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct ChapterProgressionSnapshot {
    pub user_id: String,
    pub chapter_id: String,
    pub chapter_index: u32,
    pub total_chapters: u32,
    pub entry_pseudo_level_millis: u32,
    pub exit_pseudo_level_millis: u32,
    pub entry_level: u32,
    pub exit_level: u32,
    pub planned_total_xp: u32,
    pub planned_quest_xp: u32,
    pub planned_hostile_xp: u32,
    pub actual_quest_xp: u32,
    pub actual_hostile_xp: u32,
    pub expected_hostile_defeat_count: u32,
    pub actual_hostile_defeat_count: u32,
    pub level_at_entry: u32,
    pub level_at_exit: Option<u32>,
    pub pace_band: ChapterPaceBand,
    pub created_at_micros: i64,
    pub updated_at_micros: i64,
}

#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct RuntimeEntityLevelProfile {
    pub level: u32,
    pub reference_strength: u32,
    pub chapter_id: Option<String>,
    pub chapter_index: Option<u32>,
    pub progression_role: ProgressionRole,
    pub source: LevelProfileSource,
}