//! 任务领域错误。
//!
//! 错误保持任务业务语义，例如字段缺失、步骤非法或任务尚未可交付。

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

#[derive(Clone, Debug, PartialEq, Eq)]
pub enum QuestRecordFieldError {
    MissingQuestId,
    MissingRuntimeSessionId,
    MissingActorUserId,
    MissingIssuerNpcId,
    MissingIssuerNpcName,
    MissingTitle,
    MissingDescription,
    MissingRewardText,
    EmptySteps,
    MissingStepId,
    MissingStepTitle,
    MissingStepRevealText,
    MissingStepCompleteText,
    QuestNotReadyToTurnIn,
    MissingRewardItemId,
    MissingRewardItemCategory,
    MissingRewardItemName,
    InvalidRewardItemQuantity,
    MissingRewardItemStackKey,
    RewardEquipmentItemCannotStack,
    RewardNonStackableItemMustStaySingleQuantity,
}

impl fmt::Display for QuestRecordFieldError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::MissingQuestId => f.write_str("quest_record.quest_id 不能为空"),
            Self::MissingRuntimeSessionId => {
                f.write_str("quest_record.runtime_session_id 不能为空")
            }
            Self::MissingActorUserId => f.write_str("quest_record.actor_user_id 不能为空"),
            Self::MissingIssuerNpcId => f.write_str("quest_record.issuer_npc_id 不能为空"),
            Self::MissingIssuerNpcName => f.write_str("quest_record.issuer_npc_name 不能为空"),
            Self::MissingTitle => f.write_str("quest_record.title 不能为空"),
            Self::MissingDescription => f.write_str("quest_record.description 不能为空"),
            Self::MissingRewardText => f.write_str("quest_record.reward_text 不能为空"),
            Self::EmptySteps => f.write_str("quest_record.steps 至少需要一条 step"),
            Self::MissingStepId => f.write_str("quest_step.step_id 不能为空"),
            Self::MissingStepTitle => f.write_str("quest_step.title 不能为空"),
            Self::MissingStepRevealText => f.write_str("quest_step.reveal_text 不能为空"),
            Self::MissingStepCompleteText => f.write_str("quest_step.complete_text 不能为空"),
            Self::QuestNotReadyToTurnIn => f.write_str("当前任务还没有进入可交付状态"),
            Self::MissingRewardItemId => f.write_str("quest_reward.items[].item_id 不能为空"),
            Self::MissingRewardItemCategory => {
                f.write_str("quest_reward.items[].category 不能为空")
            }
            Self::MissingRewardItemName => f.write_str("quest_reward.items[].name 不能为空"),
            Self::InvalidRewardItemQuantity => {
                f.write_str("quest_reward.items[].quantity 必须大于 0")
            }
            Self::MissingRewardItemStackKey => {
                f.write_str("quest_reward.items[].stack_key 不能为空")
            }
            Self::RewardEquipmentItemCannotStack => {
                f.write_str("quest_reward.items[] 可装备物品不能标记为 stackable")
            }
            Self::RewardNonStackableItemMustStaySingleQuantity => {
                f.write_str("quest_reward.items[] 不可堆叠物品必须固定为单槽位单数量")
            }
        }
    }
}

impl Error for QuestRecordFieldError {}