"""每例手术一个文本文件（制表符列）：`start_surgery` 时截断并写表头，每次时间窗识别**追加**一行（仅 item_id, item_name, qty, doctor_id, timestamp）。待确认行首列为 ``pending:{confirmation_id}``，语音落锤后**整行替换**为与客户端一致的最终真值，不再重复追加。终端 Markdown 时间戳为可读形式；落盘时间戳为 ISO 区间便于程序解析。

手术结束时再追加一节汇总行：item_id, item_name, qty（无其它列）；与 HTTP ``summary`` 同算法，由内存 ``details`` 经 ``build_consumption_summary`` 得到，非录制过程中按窗累计。

时间戳：在拉流起点记录 `time.time()`，与 `time.monotonic()` 时间窗对齐。直播 RTSP 经 OpenCV 一般无可靠绝对时码，以本机接收时刻为准。
"""

from __future__ import annotations

import re
import threading
from datetime import datetime, timezone
from pathlib import Path
from zoneinfo import ZoneInfo, ZoneInfoNotFoundError

from loguru import logger

from app.config import settings
from app.services.consumable_vision_algorithm import ClsTop3, _norm_product_name
from app.terminal_markdown import print_markdown_stderr

# 制表符分隔；时间范围用 U+2013 连接；本窗消耗数量恒为 1。
# top2/top3 为模型原始排序（未按手术候选重排）；item_id 只写与展示名不同的业务 id（label_id），与名称相同时留空。
HEADER = (
    "item_id\titem_name\tqty\tdoctor_id\ttimestamp\t"
    "top2_name\ttop2_conf\ttop3_name\ttop3_conf\n"
)
SUMMARY_HEADER = "item_id\titem_name\tqty\n"
_RANGE_SEP = "\u2013"  # en dash，与样例 `00:00:00.000–00:00:45.000` 一致

_lock = threading.Lock()


def _consumption_tzinfo():
    raw = (settings.consumption_log_timezone or "").strip()
    if not raw:
        lt = datetime.now().astimezone().tzinfo
        return lt if lt is not None else timezone.utc
    try:
        return ZoneInfo(raw)
    except ZoneInfoNotFoundError:
        logger.warning("无效的 consumption_log_timezone={!r}，回退为 UTC", raw)
        return timezone.utc


def format_consumption_timestamp(
    camera_id: str,
    wall_start_epoch: float,
    wall_end_epoch: float,
) -> str:
    """落盘用：墙钟 + 配置时区 → `camXX@ISO8601–ISO8601`。"""
    tz = _consumption_tzinfo()
    a = datetime.fromtimestamp(wall_start_epoch, tz=tz)
    b = datetime.fromtimestamp(wall_end_epoch, tz=tz)
    cam = short_camera_label(camera_id)
    return f"{cam}@{a.isoformat(timespec='milliseconds')}{_RANGE_SEP}{b.isoformat(timespec='milliseconds')}"


def format_consumption_timestamp_readable(
    camera_id: str,
    wall_start_epoch: float,
    wall_end_epoch: float,
) -> str:
    """仅终端 Rich：不含 `T` 的本地可读区间 + 摄像头简名，便于人眼对时。"""
    tz = _consumption_tzinfo()
    a = datetime.fromtimestamp(wall_start_epoch, tz=tz)
    b = datetime.fromtimestamp(wall_end_epoch, tz=tz)
    cam = short_camera_label(camera_id)

    def _fmt(d: datetime) -> str:
        return d.strftime("%Y-%m-%d %H:%M:%S") + f".{d.microsecond // 1000:03d}"

    return f"{_fmt(a)} {_RANGE_SEP} {_fmt(b)}  ·  {cam}"


def short_camera_label(camera_id: str) -> str:
    s = (camera_id or "").strip()
    m = re.match(r"^or-cam-(\d+)$", s, re.IGNORECASE)
    if m:
        return f"cam{int(m.group(1)):02d}"
    m2 = re.match(r"^cam-?0*(\d+)$", s, re.IGNORECASE)
    if m2:
        return f"cam{int(m2.group(1)):02d}"
    alnum = re.sub(r"[^\w-]", "", s)[:12]
    return alnum or "cam"


def _encode_cell(value: str) -> str:
    s = (value or "").replace("\r", " ").replace("\n", " ").replace("\t", " ")
    return s


def resolve_consumption_ids(
    t1_name: str,
    t1_pid: str,
    name_to_code: dict[str, str],
) -> tuple[str, str]:
    """TSV 第一列 item_id 与内存汇总键。

    - ``tsv_item_id``：业务 id（或模型侧 t1_pid）；与展示名相同则视为无独立 id，留空。
    - ``totals_key``：汇总用稳定键；无编码时用归一化名称，避免多行空 id 碰撞。
    """
    n = (t1_name or "").strip()
    norm = _norm_product_name(n)
    code = (name_to_code.get(norm) or name_to_code.get(n) or "").strip()
    p = (t1_pid or "").strip()
    catalog = (code or p).strip()
    if catalog and catalog != n:
        return catalog, catalog
    if catalog == n and catalog:
        return "", norm
    return "", norm if norm else (n or "unknown")


def resolve_consumption_item_id(
    t1_name: str,
    t1_pid: str,
    name_to_code: dict[str, str],
) -> str:
    """兼容旧调用：有编码则返回编码，否则返回汇总键（归一化名或 unknown）。"""
    tsv_id, totals_key = resolve_consumption_ids(t1_name, t1_pid, name_to_code)
    return tsv_id or totals_key


def _fmt_top_conf(v: float) -> str:
    try:
        return f"{float(v):.4f}"
    except (TypeError, ValueError):
        return "0.0000"


def build_tsv_line(
    *,
    name_to_code: dict[str, str],
    best: ClsTop3,
    doctor_id: str,
    camera_id: str,
    wall_start_epoch: float,
    wall_end_epoch: float,
) -> str:
    tsv_id, _tot_key = resolve_consumption_ids(
        best.t1_name, best.t1_pid, name_to_code
    )
    name1 = (best.t1_name or "").strip()
    ts = format_consumption_timestamp(camera_id, wall_start_epoch, wall_end_epoch)
    n2 = (best.t2_name or "").strip()
    n3 = (best.t3_name or "").strip()
    row = [
        _encode_cell(tsv_id),
        _encode_cell(name1),
        "1",
        _encode_cell(doctor_id),
        _encode_cell(ts),
        _encode_cell(n2),
        _fmt_top_conf(best.t2_conf),
        _encode_cell(n3),
        _fmt_top_conf(best.t3_conf),
    ]
    return "\t".join(row) + "\n"


def _safe_surgery_path_segment(surgery_id: str) -> str:
    s = (surgery_id or "unknown").strip() or "unknown"
    s = re.sub(r"[^\w\-.@]", "_", s)
    return s[:200] if len(s) > 200 else s


def resolved_consumption_log_path(surgery_id: str) -> Path:
    raw = (settings.consumption_tsv_log_path or "logs/consumption_{surgery_id}.txt").strip()
    safe = _safe_surgery_path_segment(surgery_id)
    if "{surgery_id}" in raw:
        raw = raw.replace("{surgery_id}", safe)
    else:
        p0 = Path(raw)
        if p0.suffix:
            raw = str(p0.with_name(f"{p0.stem}_{safe}{p0.suffix}"))
        else:
            raw = f"{raw.rstrip('/')}_{safe}.txt"
    p = Path(raw).expanduser()
    if not p.is_absolute():
        p = Path.cwd() / p
    return p


def init_consumption_log_file(surgery_id: str) -> None:
    """新手术开始：截断该手术对应文件并写入表头（一次）。"""
    if not settings.consumption_tsv_log_enabled:
        return
    path = resolved_consumption_log_path(surgery_id)
    path.parent.mkdir(parents=True, exist_ok=True)
    with _lock:
        with path.open("w", encoding="utf-8") as f:
            f.write(HEADER)


def append_consumption_tsv_line(surgery_id: str, line: str) -> None:
    if not settings.consumption_tsv_log_enabled:
        return
    path = resolved_consumption_log_path(surgery_id)
    path.parent.mkdir(parents=True, exist_ok=True)
    with _lock:
        with path.open("a", encoding="utf-8") as f:
            f.write(line)


def _md_cell(value: str) -> str:
    """避免破坏 Markdown 表格的 | 与换行。"""
    s = (value or "").replace("\r", " ").replace("\n", " ").replace("|", "｜")
    return s


def build_consumption_markdown(
    *,
    name_to_code: dict[str, str],
    best: ClsTop3,
    doctor_id: str,
    camera_id: str,
    wall_start_epoch: float,
    wall_end_epoch: float,
) -> str:
    """终端用：与落盘列一致；本窗 qty 恒为 1。"""
    tsv_id, _ = resolve_consumption_ids(best.t1_name, best.t1_pid, name_to_code)
    n1 = (best.t1_name or "").strip()
    n2 = (best.t2_name or "").strip()
    n3 = (best.t3_name or "").strip()
    ts = format_consumption_timestamp_readable(camera_id, wall_start_epoch, wall_end_epoch)
    return "\n".join(
        [
            "| item_id | item_name | qty | doctor_id | timestamp | top2 | top3 |",
            "| :--- | :--- | ---: | :--- | :--- | :--- | :--- |",
            "| {} | {} | 1 | {} | {} | {} | {} |".format(
                _md_cell(tsv_id),
                _md_cell(n1),
                _md_cell(doctor_id),
                _md_cell(ts),
                _md_cell(
                    f"{n2} ({_fmt_top_conf(best.t2_conf)})" if n2 else "—",
                ),
                _md_cell(
                    f"{n3} ({_fmt_top_conf(best.t3_conf)})" if n3 else "—",
                ),
            ),
            "",
        ]
    )


PENDING_CONSUMPTION_ITEM_NAME = "待确认"


def _build_pending_tsv_line(
    *,
    confirmation_id: str,
    model_snap: ClsTop3,
    doctor_id: str,
    camera_id: str,
    wall_start_epoch: float,
    wall_end_epoch: float,
) -> str:
    pid = f"pending:{confirmation_id}"
    ts = format_consumption_timestamp(camera_id, wall_start_epoch, wall_end_epoch)
    n2 = (model_snap.t2_name or "").strip()
    n3 = (model_snap.t3_name or "").strip()
    row = [
        _encode_cell(pid),
        _encode_cell(PENDING_CONSUMPTION_ITEM_NAME),
        "1",
        _encode_cell(doctor_id),
        _encode_cell(ts),
        _encode_cell(n2),
        _fmt_top_conf(model_snap.t2_conf),
        _encode_cell(n3),
        _fmt_top_conf(model_snap.t3_conf),
    ]
    return "\t".join(row) + "\n"


def build_pending_consumption_markdown(
    *,
    confirmation_id: str,
    model_snap: ClsTop3,
    doctor_id: str,
    camera_id: str,
    wall_start_epoch: float,
    wall_end_epoch: float,
) -> str:
    pid = f"pending:{confirmation_id}"
    n2 = (model_snap.t2_name or "").strip()
    n3 = (model_snap.t3_name or "").strip()
    ts = format_consumption_timestamp_readable(camera_id, wall_start_epoch, wall_end_epoch)
    return "\n".join(
        [
            "| item_id | item_name | qty | doctor_id | timestamp | top2 | top3 |",
            "| :--- | :--- | ---: | :--- | :--- | :--- | :--- |",
            "| {} | {} | 1 | {} | {} | {} | {} |".format(
                _md_cell(pid),
                _md_cell(PENDING_CONSUMPTION_ITEM_NAME),
                _md_cell(doctor_id),
                _md_cell(ts),
                _md_cell(
                    f"{n2} ({_fmt_top_conf(model_snap.t2_conf)})" if n2 else "—",
                ),
                _md_cell(
                    f"{n3} ({_fmt_top_conf(model_snap.t3_conf)})" if n3 else "—",
                ),
            ),
            "",
        ]
    )


def append_consumption_pending_window(
    *,
    surgery_id: str,
    confirmation_id: str,
    model_snap: ClsTop3,
    doctor_id: str,
    camera_id: str,
    wall_start_epoch: float,
    wall_end_epoch: float,
    tsv_enabled: bool | None = None,
    markdown_terminal: bool | None = None,
) -> None:
    """需医生确认的时间窗：落盘/终端记「待确认」，top2/3 仍保留模型提示；不更新消耗汇总。"""
    en_tsv = settings.consumption_tsv_log_enabled if tsv_enabled is None else tsv_enabled
    en_md = (
        settings.consumption_log_markdown_terminal
        if markdown_terminal is None
        else markdown_terminal
    )
    if not en_tsv and not en_md:
        return
    line = _build_pending_tsv_line(
        confirmation_id=confirmation_id,
        model_snap=model_snap,
        doctor_id=doctor_id,
        camera_id=camera_id,
        wall_start_epoch=wall_start_epoch,
        wall_end_epoch=wall_end_epoch,
    )
    if en_tsv:
        append_consumption_tsv_line(surgery_id, line)
    if en_md:
        print_markdown_stderr(
            build_pending_consumption_markdown(
                confirmation_id=confirmation_id,
                model_snap=model_snap,
                doctor_id=doctor_id,
                camera_id=camera_id,
                wall_start_epoch=wall_start_epoch,
                wall_end_epoch=wall_end_epoch,
            ),
        )


def _build_voice_resolved_tsv_data_line(
    *,
    name_to_code: dict[str, str],
    chosen_label: str,
    doctor_id: str,
    wall_epoch: float,
) -> str:
    """与客户端一致的最终行（top2/3 空列，timestamp 为单点）。"""
    lb = (chosen_label or "").strip()
    norm = _norm_product_name(lb)
    p = (
        name_to_code.get(norm) or name_to_code.get(lb) or ""
    ).strip()
    snap = ClsTop3(
        t1_name=lb,
        t1_conf=1.0,
        t2_name="",
        t2_conf=0.0,
        t3_name="",
        t3_conf=0.0,
        t1_pid=p,
        t2_pid="",
        t3_pid="",
    )
    return build_tsv_line(
        name_to_code=name_to_code,
        best=snap,
        doctor_id=doctor_id,
        camera_id="voice",
        wall_start_epoch=wall_epoch,
        wall_end_epoch=wall_epoch,
    )


def _data_line_starts_with_pending_id(line: str, confirmation_id: str) -> bool:
    s = (line or "").rstrip("\r\n")
    if not s or s.startswith("item_id\t"):
        return False
    want = f"pending:{(confirmation_id or '').strip()}"
    first = s.split("\t", 1)[0]
    return first == _encode_cell(want) or first == want


def replace_pending_line_with_voice_resolution(
    *,
    surgery_id: str,
    confirmation_id: str,
    name_to_code: dict[str, str],
    chosen_label: str,
    doctor_id: str,
    wall_epoch: float,
    tsv_enabled: bool | None = None,
) -> None:
    """将同一 ``confirmation_id`` 下先前追加的「待确认」行整行改为最终真值，不再多追加一行。

    未找到 ``pending:{confirmation_id}`` 时回退为追加（兼容旧文件或行缺失）。读改写全程持
    :data:`_lock`，避免与并发的 append 交错。
    """
    en = settings.consumption_tsv_log_enabled if tsv_enabled is None else tsv_enabled
    if not en:
        return
    if not (chosen_label or "").strip() or not (confirmation_id or "").strip():
        return
    new_line = _build_voice_resolved_tsv_data_line(
        name_to_code=name_to_code,
        chosen_label=chosen_label,
        doctor_id=doctor_id,
        wall_epoch=wall_epoch,
    )
    path = resolved_consumption_log_path(surgery_id)
    with _lock:
        if not path.is_file():
            path.parent.mkdir(parents=True, exist_ok=True)
            with path.open("w", encoding="utf-8") as f:
                f.write(HEADER)
                f.write(new_line)
            logger.warning(
                "consumption TSV 无文件，无法替换 pending 行，已写表头+最终行: {}",
                path,
            )
            return
        text = path.read_text(encoding="utf-8")
        lines = text.splitlines(keepends=True)
        replaced = False
        out: list[str] = []
        for line in lines:
            if (
                not replaced
                and _data_line_starts_with_pending_id(line, confirmation_id)
            ):
                out.append(new_line)
                replaced = True
            else:
                out.append(line)
        if not replaced:
            logger.warning(
                "未在 TSV 中找到 pending 行，回退为追加: surgery={} confirm={}",
                surgery_id,
                confirmation_id,
            )
            with path.open("a", encoding="utf-8") as f:
                f.write(new_line)
            return
        path.write_text("".join(out), encoding="utf-8")


def append_consumption_voice_resolution_line(
    *,
    surgery_id: str,
    name_to_code: dict[str, str],
    chosen_label: str,
    doctor_id: str,
    wall_epoch: float,
    tsv_enabled: bool | None = None,
) -> None:
    """已弃用：请使用 ``replace_pending_line_with_voice_resolution`` 并传 ``confirmation_id``。"""
    if not (chosen_label or "").strip():
        return
    line = _build_voice_resolved_tsv_data_line(
        name_to_code=name_to_code,
        chosen_label=chosen_label,
        doctor_id=doctor_id,
        wall_epoch=wall_epoch,
    )
    append_consumption_tsv_line(surgery_id, line)


def append_consumption_log_summary(
    surgery_id: str,
    totals: dict[str, tuple[str, int]],
) -> None:
    """在明细行之后追加汇总块（表头 + 每物品一行）。"""
    if not settings.consumption_tsv_log_enabled or not totals:
        return
    path = resolved_consumption_log_path(surgery_id)
    if not path.is_file():
        return
    body = "".join(
        ["\n", SUMMARY_HEADER]
        + [
            "\t".join([_encode_cell(iid), _encode_cell(name), str(qty)]) + "\n"
            for iid, (name, qty) in sorted(totals.items(), key=lambda x: x[0])
        ]
    )
    with _lock:
        with path.open("a", encoding="utf-8") as f:
            f.write(body)


def print_consumption_summary_markdown(
    totals: dict[str, tuple[str, int]],
) -> None:
    if not settings.consumption_log_markdown_terminal or not totals:
        return
    lines = [
        "## 消耗汇总",
        "",
        "| item_id | item_name | qty |",
        "| :--- | :--- | ---: |",
    ]
    for iid, (name, qty) in sorted(totals.items(), key=lambda x: x[0]):
        lines.append(
            "| {} | {} | {} |".format(_md_cell(iid), _md_cell(name), qty)
        )
    lines.append("")
    print_markdown_stderr("\n".join(lines))


class ConsumptionTsvWriter:
    """注入式 consumption 日志写入器，取代模块全局 ``settings`` 读取。

    行为与模块级函数完全一致；保留模块级函数以维持旧调用点的兼容期。
    """

    def __init__(self, app_settings) -> None:
        self._s = app_settings

    def init_file(self, surgery_id: str) -> None:
        if not self._s.consumption_tsv_log_enabled:
            return
        path = resolved_consumption_log_path(surgery_id)
        path.parent.mkdir(parents=True, exist_ok=True)
        with _lock:
            with path.open("w", encoding="utf-8") as f:
                f.write(HEADER)

    def append_window(
        self,
        *,
        surgery_id: str,
        name_to_code: dict[str, str],
        best: ClsTop3,
        doctor_id: str,
        camera_id: str,
        wall_start_epoch: float,
        wall_end_epoch: float,
    ) -> None:
        if not self._s.consumption_tsv_log_enabled and not self._s.consumption_log_markdown_terminal:
            return
        if self._s.consumption_tsv_log_enabled:
            line = build_tsv_line(
                name_to_code=name_to_code,
                best=best,
                doctor_id=doctor_id,
                camera_id=camera_id,
                wall_start_epoch=wall_start_epoch,
                wall_end_epoch=wall_end_epoch,
            )
            append_consumption_tsv_line(surgery_id, line)
        if self._s.consumption_log_markdown_terminal:
            print_markdown_stderr(
                build_consumption_markdown(
                    name_to_code=name_to_code,
                    best=best,
                    doctor_id=doctor_id,
                    camera_id=camera_id,
                    wall_start_epoch=wall_start_epoch,
                    wall_end_epoch=wall_end_epoch,
                ),
            )

    def append_summary(
        self,
        surgery_id: str,
        totals: dict[str, tuple[str, int]],
    ) -> None:
        if not self._s.consumption_tsv_log_enabled or not totals:
            return
        path = resolved_consumption_log_path(surgery_id)
        if not path.is_file():
            return
        body = "".join(
            ["\n", SUMMARY_HEADER]
            + [
                "\t".join([_encode_cell(iid), _encode_cell(name), str(qty)]) + "\n"
                for iid, (name, qty) in sorted(totals.items(), key=lambda x: x[0])
            ]
        )
        with _lock:
            with path.open("a", encoding="utf-8") as f:
                f.write(body)

    def print_summary_markdown(self, totals: dict[str, tuple[str, int]]) -> None:
        if not self._s.consumption_log_markdown_terminal or not totals:
            return
        lines = [
            "## 消耗汇总",
            "",
            "| item_id | item_name | qty |",
            "| :--- | :--- | ---: |",
        ]
        for iid, (name, qty) in sorted(totals.items(), key=lambda x: x[0]):
            lines.append(
                "| {} | {} | {} |".format(_md_cell(iid), _md_cell(name), qty)
            )
        lines.append("")
        print_markdown_stderr("\n".join(lines))


def append_consumption_window(
    *,
    surgery_id: str,
    name_to_code: dict[str, str],
    best: ClsTop3,
    doctor_id: str,
    camera_id: str,
    wall_start_epoch: float,
    wall_end_epoch: float,
) -> None:
    if not settings.consumption_tsv_log_enabled and not settings.consumption_log_markdown_terminal:
        return
    if settings.consumption_tsv_log_enabled:
        line = build_tsv_line(
            name_to_code=name_to_code,
            best=best,
            doctor_id=doctor_id,
            camera_id=camera_id,
            wall_start_epoch=wall_start_epoch,
            wall_end_epoch=wall_end_epoch,
        )
        append_consumption_tsv_line(surgery_id, line)
    if settings.consumption_log_markdown_terminal:
        print_markdown_stderr(
            build_consumption_markdown(
                name_to_code=name_to_code,
                best=best,
                doctor_id=doctor_id,
                camera_id=camera_id,
                wall_start_epoch=wall_start_epoch,
                wall_end_epoch=wall_end_epoch,
            ),
        )