// 内部原因码 → 一句人话 + 下一步(DEAI-2)。整理记录、下载时间线、任务都用这张表;
// 原码只放在界面的「技术信息」里,不直接给人看。不认识的码返回 null,由调用方决定兜底文字。

export type ReasonText = {
  /** 发生了什么(一句,不带句号) */
  text: string;
  /** 下一步能做什么(一句,不带句号);没有可做的就不给 */
  action?: string;
};

const REASONS: Record<string, ReasonText> = {
  in_place_failed: { text: "原地整理未完成", action: "在整理记录里查看未登记的文件" },
  in_place_outside_library: { text: "文件不在所选媒体库目录内", action: "先登记该目录为媒体库，或改用复制／移动" },
  in_place_cannot_replace: { text: "原地整理不替换已有版本", action: "洗版改用复制／移动整理" },
  source_config_mismatch: { text: "文件或媒体类型不属于所选整理来源", action: "检查来源目录和媒体类型" },
  classification_unavailable: { text: "暂时无法确定媒体分类", action: "检查 TMDB 连接或选择固定分类后重新整理" },
  identity_unknown: { text: "没识别出作品", action: "指定作品后重新整理" },
  identity_ambiguous: { text: "没识别出作品", action: "指定作品" },
  identity_unresolved: { text: "没识别出作品", action: "指定作品" },
  episode_mapping: { text: "集数对不上作品的季集", action: "确认集数映射" },
  episode_unresolved: { text: "集数对不上作品的季集", action: "确认集数映射" },
  target_exists: { text: "媒体库里已有同名文件", action: "在整理记录里选择替换、保留两者或跳过" },
  duplicate_target: { text: "改名后与其他文件同名", action: "改命名模板或排除其中一个" },
  replace_requires_grant: { text: "替换已有文件需要你批准", action: "在整理记录里选择是否替换" },
  hnr_unsatisfied: { text: "做种时间还不够，不能移动", action: "改用复制，或等做种完成" },
  hnr_unknown: { text: "不确定做种要求是否满足", action: "改用复制，或确认站点规则" },
  orphan_sidecar: { text: "字幕等附属文件找不到对应视频" },
  no_main_video: { text: "没有可整理的主视频" },
  below_min_size: { text: "文件小于最小体积，没有识别", action: "需要时在设置里调低最小体积" },
  too_small: { text: "文件小于最小体积" },
  source_path_unknown: { text: "下载器没有报告保存路径", action: "在下载器里确认任务还在" },
  path_mapping_missing: { text: "下载目录没有路径映射", action: "在设置 → 下载器里添加路径映射" },
  file_list_unavailable: { text: "读不到下载器里的文件列表", action: "稍后重试" },
  source_missing: { text: "找不到源文件", action: "检查下载目录是否挂载" },
  source_size_mismatch: { text: "源文件大小与下载器记录不一致", action: "等下载完成后重试" },
  too_many_files: { text: "文件太多，超出单次整理上限", action: "分批整理" },
  no_source: { text: "没有要整理的文件" },
  entity_not_found: { text: "作品已不存在" },
  no_library_root: { text: "没有可用的媒体库目录", action: "在设置 → 媒体库与目录里添加" },
  library_root_offline: { text: "媒体库目录不可访问或未挂载", action: "检查挂载后重试" },
  target_dir_unavailable: { text: "无法创建整理目标目录", action: "检查目录权限或挂载，恢复后自动重试" },
  organize_stalled: { text: "整理多次重试仍未完成", action: "检查后重新整理" },
  excluded_unresolved: { text: "有视频没能确定季集或目标目录，留在原处", action: "确认季集后重新整理" },
  target_dir_outside_root: { text: "目标目录不在媒体库目录里" },
  slot_entity_mismatch: { text: "收录版本和作品对不上" },
  binding_on_other_root: { text: "作品已放在另一个媒体库目录", action: "在作品详情里调整目录" },
  move_downgraded_to_copy: { text: "做种未完成，已改为复制" },
  already_in_library: { text: "已在媒体库里" },
  main_not_transferred: { text: "主文件没有整理，附属文件一起跳过" },
  timeout: { text: "操作超时", action: "稍后重试" },
  downloader_unavailable: { text: "下载器连不上", action: "在设置 → 下载器里测试连接" },
  downloader_error: { text: "下载器报错", action: "查看下载器日志" },
  // DL-2b:下载面板整理状态、下载计划里出现的码
  blocked: { text: "有冲突要先处理", action: "在整理记录里处理" },
  blocked_by_conflict: { text: "有冲突，暂不整理" },
  transfer_failed: { text: "文件没有整理成功", action: "在整理记录里查看失败的文件" },
  main_failed: { text: "主文件整理失败，附属文件一起跳过" },
  not_imported_kind: { text: "这类文件不整理" },
  target_root_not_managed: { text: "目标目录不是本工具管理的媒体库目录", action: "在设置 → 媒体库与目录里检查" },
  download_removed: { text: "下载任务已从下载器删除" },
  // FIX-7:智能体汇报与工具结果里常见的码(能力错误、下载计划的空间判定、站点登录、待处理类型)
  invalid_input: { text: "参数不对" },
  invalid_output: { text: "返回结果格式不对" },
  unauthorized: { text: "需要你批准" },
  forbidden: { text: "没有权限" },
  not_found: { text: "没找到" },
  precondition: { text: "前置条件不满足" },
  internal: { text: "内部错误" },
  volume_state_unknown: { text: "下载盘读不到容量", action: "检查下载器的路径映射和容器挂载" },
  hard_threshold_reached: { text: "下载盘已到暂停线" },
  projected_over_threshold: { text: "下完会超过下载盘暂停线" },
  awaiting_resume_watermark: { text: "等下载盘降到恢复线" },
  request_size_unknown: { text: "资源大小未知" },
  inflight_size_unknown: { text: "在下的任务大小未知" },
  budget_exceeded: { text: "超出下载额度" },
  budget_unknown_size: { text: "资源大小未知，无法核对下载额度" },
  no_downloader_instance: { text: "没有可用的下载器", action: "在设置 → 下载器里添加" },
  download_save_path_unmapped: { text: "下载目录没有路径映射", action: "在设置 → 下载器里添加路径映射" },
  site_out_of_scope: { text: "站点不在这次的范围内" },
  slot_changed_or_reserved: { text: "收录版本已变化或被占用" },
  auth_missing: { text: "站点没有配置 Cookie", action: "在站点账号里填写" },
  auth_expired: { text: "站点登录已过期", action: "刷新站点登录" },
  auth_invalid: { text: "站点登录无效", action: "检查站点账号" },
  source_unreachable: { text: "站点连不上" },
  download_failed: { text: "下载失败" },
  download_stalled: { text: "下载无进展" },
  space_insufficient: { text: "空间不足" },
  downloader_offline: { text: "下载器连不上" },
  cache_volume_unknown: { text: "下载盘读不到容量" },
  unidentifiable: { text: "没识别出作品" },
  user_deleted: { text: "已删除" },
  // DL-3:还没提交就结束或在等的下载(计划的 statusReason、提交任务的延后原因)
  cancelled_by_user: { text: "你取消了这个下载" },
  approval_rejected: { text: "你没批准这个下载" },
  approval_revoked: { text: "会话停止，下载没有提交" },
  approval_expired: { text: "等批准超时，下载没有提交" },
  subscription_reset: { text: "订阅重置时取消" },
  automation_disabled: { text: "自动化已关闭", action: "在设置 → 自动化里打开" },
  read_only_reconcile: { text: "只读对账中，暂不提交下载" },
  rejected: { text: "下载器拒绝了这个种子" },
  source_failed: { text: "从站点取种子失败", action: "检查站点登录后重新下载" },
  // SCR-1 / SCR-2 刮削(刮削记录、逐文件结果)
  scrape_no_files: { text: "作品没有已整理文件", action: "到文件管理里对目录刮削" },
  scrape_no_metadata: { text: "没有可用的元数据", action: "指定 TMDB 作品后重新刮削" },
  scrape_root_read_only: { text: "媒体库目录是只登记模式，不写文件" },
  scrape_root_offline: { text: "目录不可访问或未挂载" },
  scrape_not_video: { text: "不是视频文件或目录" },
  scrape_path_missing: { text: "目录或文件已不存在" },
  path_escape: { text: "路径指向登记目录之外" },
  task_enqueue_failed: { text: "后台任务没排上", action: "稍后重试" },
  scrape_no_videos: { text: "目录里没有视频", action: "对作品或季目录刮削" },
  scrape_tmdb_unavailable: { text: "TMDB 不可用", action: "检查 TMDB 设置后重新刮削" },
  scrape_exists: { text: "已有文件，没有覆盖（不是本工具写的，或选了只补缺失）" },
  scrape_unchanged: { text: "内容没有变化" },
  scrape_user_modified: { text: "文件写入后被改过，更新时不覆盖", action: "要替换就用「全部覆盖」重新刮削" },
  scrape_metadata_missing: { text: "缺少这一季或这一集的元数据，没有写占位文件", action: "刷新元数据后重新刮削" },
  scrape_internal_error: { text: "刮削过程中出错", action: "查看日志后重新刮削" },
  scrape_write_failed: { text: "写入目录失败", action: "检查目录权限后重新刮削" },
  scrape_image_failed: { text: "图片没下载成功", action: "稍后重新刮削" },
  scrape_no_episode: { text: "文件名里认不出集号" },
  scrape_no_work_dir: { text: "视频直接放在媒体库目录下，不写剧集和季的文件" },
  scrape_canceled: { text: "刮削任务被取消", action: "重新刮削" },
  scrape_not_library: { text: "整理目标不在媒体库目录里，不自动刮削", action: "到文件管理里对目录刮削" },
};

/**
 * 解析原因串:`identity_unknown`、`blocked:target_exists,hnr_unknown`、`move_downgraded_to_copy:hnr_unknown`。
 * 多个码时合并成一句(用"；"分隔)。
 */
export function reasonText(raw: string | null | undefined): ReasonText | null {
  if (!raw) return null;
  const s = raw.trim();
  const [head, rest] = s.includes(":") ? [s.slice(0, s.indexOf(":")), s.slice(s.indexOf(":") + 1)] : [s, ""];
  if (head === "blocked" && rest) {
    const parts = rest
      .split(",")
      .map((c) => REASONS[c.trim()])
      .filter((x): x is ReasonText => !!x);
    if (!parts.length) return null;
    return {
      text: [...new Set(parts.map((p) => p.text))].join("；"),
      ...(parts[0]?.action ? { action: parts[0].action } : {}),
    };
  }
  // 带分类前缀的码(`cache:volume_state_unknown`、`deferred:no_downloader_instance`)按冒号后的码查
  return REASONS[s] ?? REASONS[head] ?? (rest ? (REASONS[rest.trim()] ?? null) : null);
}

/** 只要一句话:"没识别出作品。指定作品后重新整理";不认识的码返回 fallback */
export function reasonSentence(raw: string | null | undefined, fallback = "处理失败"): string {
  const r = reasonText(raw);
  if (!r) return raw && !/^[a-z_:.,]+$/.test(raw) ? raw : fallback;
  return r.action ? `${r.text}。${r.action}` : r.text;
}

/** 看起来像内部码(小写下划线 / 冒号)而不是给人看的句子 */
export const looksLikeCode = (v: string | null | undefined) => !!v && /^[a-z0-9_]+([:.,][a-z0-9_:.,-]*)?$/.test(v);

// ── 入库版本与收录版本的差距(POLISH-1)──
// 码由 @umt/domain matchVersions 给出,冒号后是参数:目标分辨率 / 来源 / 编码 / 字幕语言。

const SOURCE_NAME: Record<string, string> = { REMUX: "Remux", BluRay: "蓝光压制", "BluRay-Disc": "原盘" };
const LANG_NAME: Record<string, string> = { "zh-Hans": "简中", "zh-Hant": "繁中", zh: "中文", en: "英文", ja: "日文" };

const GAPS: Record<string, (p: string) => string> = {
  version_resolution: (p) => (p ? `可换成 ${p}` : "分辨率不符合收录版本"),
  version_resolution_upgrade: (p) => (p ? `可换成 ${p}` : "分辨率还能更高"),
  version_source: (p) => (p ? `可换成 ${SOURCE_NAME[p] ?? p}` : "来源不符合收录版本"),
  version_source_upgrade: () => "可换成更好的来源",
  version_encode: () => "收录版本要蓝光压制",
  version_hdr: (p) => `缺 ${p || "HDR"} 版本`,
  version_sdr: () => "收录版本要 SDR",
  version_hdr_excluded: () => "HDR 格式被收录版本排除",
  version_codec: (p) => (p ? `可换成 ${p} 编码` : "编码被收录版本排除"),
  version_subtitles: (p) => {
    const langs = p
      .split("/")
      .filter(Boolean)
      .map((l) => LANG_NAME[l] ?? l)
      .join("/");
    if (!langs) return "缺字幕";
    return /^[\x20-\x7e]+$/.test(langs) ? `缺 ${langs} 字幕` : `缺${langs}字幕`;
  },
  version_size: () => "体积不在收录范围",
  version_edition: () => "剪辑版本不符合",
  version_group: () => "制作组被排除",
  version_content_type: () => "内容类型不符合",
  version_rules: () => "不符合收录版本的规则",
  version_spec_unknown: () => "认不出规格",
  version_priority: () => "还有更好的版本可换",
};

/** 一个差距码 → 短句("可换成 2160p"、"缺 HDR 版本");不认识的码返回 null */
export function matchGapText(code: string | null | undefined): string | null {
  if (!code) return null;
  const i = code.indexOf(":");
  const head = i < 0 ? code : code.slice(0, i);
  const fn = GAPS[head];
  return fn ? fn(i < 0 ? "" : code.slice(i + 1)) : null;
}

/** 一组差距码 → 去重后的短句列表 */
export function matchGapTexts(codes: readonly string[] | null | undefined): string[] {
  return [...new Set((codes ?? []).map(matchGapText).filter((t): t is string => !!t))];
}