//! 运行时物品领域错误。
//!
//! 错误只表达物品/奇遇规则失败，例如 encounter 缺失或奖励字段非法。

use std::{error::Error, fmt};

#[derive(Clone, Debug, PartialEq, Eq)]
pub enum TreasureFieldError {
    MissingTreasureRecordId,
    MissingRuntimeSessionId,
    MissingStorySessionId,
    MissingActorUserId,
    MissingEncounterId,
    MissingEncounterName,
    MissingRewardItemId,
    MissingRewardItemCategory,
    MissingRewardItemName,
    InvalidRewardItemQuantity,
    MissingRewardItemStackKey,
    RewardEquipmentItemCannotStack,
    RewardNonStackableItemMustStaySingleQuantity,
}

impl fmt::Display for TreasureFieldError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::MissingTreasureRecordId => {
                f.write_str("treasure_record.treasure_record_id 不能为空")
            }
            Self::MissingRuntimeSessionId => {
                f.write_str("treasure_record.runtime_session_id 不能为空")
            }
            Self::MissingStorySessionId => f.write_str("treasure_record.story_session_id 不能为空"),
            Self::MissingActorUserId => f.write_str("treasure_record.actor_user_id 不能为空"),
            Self::MissingEncounterId => f.write_str("treasure_record.encounter_id 不能为空"),
            Self::MissingEncounterName => f.write_str("treasure_record.encounter_name 不能为空"),
            Self::MissingRewardItemId => {
                f.write_str("treasure_record.reward_items[].item_id 不能为空")
            }
            Self::MissingRewardItemCategory => {
                f.write_str("treasure_record.reward_items[].category 不能为空")
            }
            Self::MissingRewardItemName => {
                f.write_str("treasure_record.reward_items[].item_name 不能为空")
            }
            Self::InvalidRewardItemQuantity => {
                f.write_str("treasure_record.reward_items[].quantity 必须大于 0")
            }
            Self::MissingRewardItemStackKey => {
                f.write_str("treasure_record.reward_items[].stack_key 不能为空")
            }
            Self::RewardEquipmentItemCannotStack => {
                f.write_str("treasure_record.reward_items[] 可装备物品不能标记为 stackable")
            }
            Self::RewardNonStackableItemMustStaySingleQuantity => {
                f.write_str("treasure_record.reward_items[] 不可堆叠物品必须固定为单槽位单数量")
            }
        }
    }
}

impl Error for TreasureFieldError {}