#!/usr/bin/env python3
"""
One-off: read life-echo pg_dump COPY data, emit one markdown per user
(conversations + segments + stories / story_versions + memoir chapters).

Run from api/ (recommended, matches uv venv):

  uv run python scripts/extract_sql_to_user_md.py
  uv run python scripts/extract_sql_to_user_md.py ./tests/data/dump.sql
  uv run python scripts/extract_sql_to_user_md.py --all ./tests/data/
  uv run python scripts/extract_sql_to_user_md.py --only 15366015180 ./backups/dev.sql

Only users listed in EXPORT_USER_KEYS (below) are exported by default.
`--only` may be repeated; it overrides EXPORT_USER_KEYS for that run.
Use --all to export everyone. Use () for EXPORT_USER_KEYS to mean “all”.
Users are skipped only when they have no conversations, stories, or chapters in the dump.
Sessions that have no segments rows are omitted (no empty “### 会话” stubs).

If you pass a directory, the newest *.sql inside is used.

Default SQL path: <repo>/api/backups/life_echo_20260313_182756.sql
Output: api/tests/user_exports/<safe_name>_<uuid>.md
"""

from __future__ import annotations

import re
import sys
from collections import defaultdict
from pathlib import Path

# This file lives at <repo>/api/scripts/…
API_ROOT = Path(__file__).resolve().parents[1]
DEFAULT_SQL = API_ROOT / "backups/life_echo_20260313_182756.sql"
OUT_DIR = API_ROOT / "tests" / "user_exports"

# --- 编辑这里：只导出匹配任意一项的用户（完整 user id 或手机号，手机号可只写数字）---
# 设为空元组 () 表示不筛选、导出全部（与命令行 --all 相同效果）。
EXPORT_USER_KEYS: tuple[str, ...] = (
    "1ade609c-567a-450b-b8fb-776aaba3c2b3",
    "5e51151a-cb46-4c5c-ad5d-dae9c58ca243",
    "e27fcd97-fefa-43b8-a7a3-3ecd49ebf5f0",
    "15366015180",
)


def _digits_only(s: str) -> str:
    return "".join(c for c in s if c.isdigit())


def user_matches_export_keys(u: dict, keys: tuple[str, ...]) -> bool:
    """Match full UUID (case-insensitive) or phone (exact, after stripping non-digits)."""
    if not keys:
        return True
    uid = u["id"]
    phone = u.get("phone") or ""
    phone_d = _digits_only(phone)
    for raw in keys:
        key = raw.strip()
        if not key:
            continue
        if key.lower() == uid.lower():
            return True
        if _digits_only(key) and _digits_only(key) == phone_d and phone_d:
            return True
        if key == phone:
            return True
    return False


def unescape_pg_text(s: str) -> str:
    if s == r"\N":
        return ""
    return (
        s.replace("\\n", "\n")
        .replace("\\t", "\t")
        .replace("\\r", "\r")
        .replace("\\\\", "\\")
    )


def extract_copy_block(text: str, table: str) -> list[str]:
    """Lines between COPY public.<table> ... FROM stdin; and \\."""
    marker = f"COPY public.{table} "
    start = text.find(marker)
    if start == -1:
        return []
    nl = text.find("\n", start)
    if nl == -1:
        return []
    body_start = nl + 1
    end = text.find("\n\\.\n", body_start)
    if end == -1:
        end = text.find("\n\\.", body_start)
    if end == -1:
        return []
    chunk = text[body_start:end]
    return [ln for ln in chunk.split("\n") if ln.strip()]


def parse_users(lines: list[str]) -> dict[str, dict]:
    users: dict[str, dict] = {}
    for ln in lines:
        parts = ln.split("\t")
        if len(parts) < 14:
            continue
        uid, phone = parts[0], parts[1]
        nickname = parts[5] if parts[5] != r"\N" else ""
        email = parts[3] if parts[3] != r"\N" else ""
        users[uid] = {
            "id": uid,
            "phone": phone,
            "nickname": nickname,
            "email": email,
        }
    return users


def parse_conversations(lines: list[str]) -> list[dict]:
    out: list[dict] = []
    for ln in lines:
        parts = ln.split("\t")
        if len(parts) < 9:
            continue
        out.append(
            {
                "id": parts[0],
                "user_id": parts[1],
                "started_at": parts[2],
                "ended_at": parts[3] if parts[3] != r"\N" else "",
                "duration_seconds": parts[4],
                "summary": unescape_pg_text(parts[5]) if parts[5] != r"\N" else "",
                "status": parts[6],
                "current_topic": unescape_pg_text(parts[7])
                if parts[7] != r"\N"
                else "",
                "conversation_stage": unescape_pg_text(parts[8])
                if parts[8] != r"\N"
                else "",
            }
        )
    return out


def parse_segments(lines: list[str]) -> list[dict]:
    """Legacy dumps: 8 cols ending in agent_response. Current schema: 12 cols (see Segment model)."""
    out: list[dict] = []
    for ln in lines:
        parts = ln.split("\t")
        if len(parts) < 8:
            continue
        sid, cid, audio = parts[0], parts[1], parts[2]
        if len(parts) >= 12:
            transcript = unescape_pg_text("\t".join(parts[3:-8]))
            created_at = parts[-7]
            processed = parts[-6]
            topic_category = parts[-5] if parts[-5] != r"\N" else ""
            agent_response = unescape_pg_text(parts[-4]) if parts[-4] != r"\N" else ""
        else:
            agent_response = unescape_pg_text(parts[-1]) if parts[-1] != r"\N" else ""
            topic_category = parts[-2] if parts[-2] != r"\N" else ""
            processed = parts[-3]
            created_at = parts[-4]
            transcript = unescape_pg_text("\t".join(parts[3:-4]))
        out.append(
            {
                "id": sid,
                "conversation_id": cid,
                "audio_url": audio if audio != r"\N" else "",
                "transcript_text": transcript,
                "created_at": created_at,
                "processed": processed,
                "topic_category": topic_category,
                "agent_response": agent_response,
            }
        )
    return out


def parse_stories(lines: list[str]) -> list[dict]:
    """COPY columns: id, user_id, title, stage, story_type, summary, canonical_markdown,
    time_start..updated_at — 17 fields; canonical_markdown may contain tabs.
    """
    out: list[dict] = []
    tail = 10  # time_start through updated_at
    for ln in lines:
        parts = ln.split("\t")
        if len(parts) < 17:
            continue
        sid, uid, title, stage, story_type = (
            parts[0],
            parts[1],
            parts[2],
            parts[3] if parts[3] != r"\N" else "",
            parts[4] if parts[4] != r"\N" else "",
        )
        summary = unescape_pg_text(parts[5]) if parts[5] != r"\N" else ""
        canonical = unescape_pg_text("\t".join(parts[6:-tail]))
        time_start = parts[-10] if parts[-10] != r"\N" else ""
        time_end = parts[-9] if parts[-9] != r"\N" else ""
        people_refs = parts[-8] if parts[-8] != r"\N" else ""
        place_refs = parts[-7] if parts[-7] != r"\N" else ""
        tag_refs = parts[-6] if parts[-6] != r"\N" else ""
        status = parts[-5] if parts[-5] != r"\N" else ""
        confidence = parts[-4] if parts[-4] != r"\N" else ""
        current_version_id = parts[-3] if parts[-3] != r"\N" else ""
        created_at, updated_at = parts[-2], parts[-1]
        out.append(
            {
                "id": sid,
                "user_id": uid,
                "title": title,
                "stage": stage,
                "story_type": story_type,
                "summary": summary,
                "canonical_markdown": canonical,
                "time_start": time_start,
                "time_end": time_end,
                "people_refs": people_refs,
                "place_refs": place_refs,
                "tag_refs": tag_refs,
                "status": status,
                "confidence": confidence,
                "current_version_id": current_version_id,
                "created_at": created_at,
                "updated_at": updated_at,
            }
        )
    return out


def parse_story_versions(lines: list[str]) -> list[dict]:
    """COPY: id, story_id, version_no, markdown_snapshot, change_summary, actor_type,
    source_type, parent_version_id, prompt_meta, created_at — markdown_snapshot may contain tabs.
    """
    out: list[dict] = []
    tail = 6  # change_summary .. created_at
    for ln in lines:
        parts = ln.split("\t")
        if len(parts) < 10:
            continue
        vid, story_id = parts[0], parts[1]
        version_no_raw = parts[2]
        try:
            version_no = int(version_no_raw)
        except ValueError:
            version_no = 0
        markdown_snapshot = unescape_pg_text("\t".join(parts[3:-tail]))
        change_summary = unescape_pg_text(parts[-6]) if parts[-6] != r"\N" else ""
        actor_type = parts[-5] if parts[-5] != r"\N" else ""
        source_type = parts[-4] if parts[-4] != r"\N" else ""
        parent_version_id = parts[-3] if parts[-3] != r"\N" else ""
        prompt_meta = parts[-2] if parts[-2] != r"\N" else ""
        created_at = parts[-1]
        out.append(
            {
                "id": vid,
                "story_id": story_id,
                "version_no": version_no,
                "markdown_snapshot": markdown_snapshot,
                "change_summary": change_summary,
                "actor_type": actor_type,
                "source_type": source_type,
                "parent_version_id": parent_version_id,
                "prompt_meta": prompt_meta,
                "created_at": created_at,
            }
        )
    return out


def parse_chapters(lines: list[str]) -> list[dict]:
    """12 columns; content may contain tabs — unpack from the right."""
    out: list[dict] = []
    for ln in lines:
        parts = ln.split("\t")
        if len(parts) < 12:
            continue
        is_active = parts[-1]
        source_segments = parts[-2]
        is_new = parts[-3]
        category = parts[-4]
        updated_at = parts[-5]
        images = parts[-6]
        status = parts[-7]
        order_index = parts[-8]
        cid, uid, title = parts[0], parts[1], parts[2]
        content = unescape_pg_text("\t".join(parts[3:-8]))
        out.append(
            {
                "id": cid,
                "user_id": uid,
                "title": title,
                "content": content,
                "order_index": int(order_index) if order_index.isdigit() else 0,
                "status": status,
                "images": images,
                "updated_at": updated_at,
                "category": category if category != r"\N" else "",
                "is_new": is_new,
                "source_segments": source_segments,
                "is_active": is_active,
            }
        )
    return out


def safe_filename(s: str) -> str:
    s = re.sub(r"[^\w\u4e00-\u9fff.-]+", "_", s.strip())
    s = s.strip("_") or "user"
    return s[:80]


def resolve_sql_arg(raw: str | None) -> Path:
    if raw is None:
        return DEFAULT_SQL
    p = Path(raw).expanduser()
    if not p.is_absolute():
        p = Path.cwd() / p
    p = p.resolve()
    if p.is_dir():
        candidates = sorted(
            p.glob("*.sql"), key=lambda x: x.stat().st_mtime, reverse=True
        )
        if not candidates:
            sys.exit(f"No *.sql files in directory: {p}")
        return candidates[0]
    return p


def _parse_cli_args(argv: list[str]) -> tuple[Path | None, bool, tuple[str, ...]]:
    """Returns (sql_path_arg or None, export_all, only_keys or ())."""
    export_all = False
    only_keys: list[str] = []
    positional: list[str] = []
    i = 0
    while i < len(argv):
        a = argv[i]
        if a == "--all":
            export_all = True
            i += 1
        elif a == "--only":
            if i + 1 >= len(argv):
                sys.exit("--only requires a value (user id or phone)")
            only_keys.append(argv[i + 1])
            i += 2
        else:
            positional.append(a)
            i += 1
    if len(positional) > 1:
        sys.exit("Extra arguments: pass at most one SQL path or directory.")
    sql_arg = positional[0] if positional else None
    return sql_arg, export_all, tuple(only_keys)


def main() -> None:
    sql_arg, export_all_flag, only_keys_cli = _parse_cli_args(sys.argv[1:])
    sql_path = resolve_sql_arg(sql_arg)
    if not sql_path.is_file():
        print(f"Missing SQL file: {sql_path}")
        sys.exit(1)

    text = sql_path.read_text(encoding="utf-8", errors="replace")

    users = parse_users(extract_copy_block(text, "users"))
    conversations = parse_conversations(extract_copy_block(text, "conversations"))
    segments = parse_segments(extract_copy_block(text, "segments"))
    stories = parse_stories(extract_copy_block(text, "stories"))
    story_versions = parse_story_versions(extract_copy_block(text, "story_versions"))
    chapters = parse_chapters(extract_copy_block(text, "chapters"))

    conv_by_user: dict[str, list[dict]] = defaultdict(list)
    for c in conversations:
        conv_by_user[c["user_id"]].append(c)

    seg_by_conv: dict[str, list[dict]] = defaultdict(list)
    for s in segments:
        seg_by_conv[s["conversation_id"]].append(s)

    stories_by_user: dict[str, list[dict]] = defaultdict(list)
    for st in stories:
        stories_by_user[st["user_id"]].append(st)

    versions_by_story: dict[str, list[dict]] = defaultdict(list)
    for v in story_versions:
        versions_by_story[v["story_id"]].append(v)

    chap_by_user: dict[str, list[dict]] = defaultdict(list)
    for ch in chapters:
        chap_by_user[ch["user_id"]].append(ch)

    if export_all_flag and only_keys_cli:
        sys.exit("Cannot combine --all with --only")
    if only_keys_cli:
        active_keys = only_keys_cli
    else:
        active_keys = (
            () if (export_all_flag or not EXPORT_USER_KEYS) else EXPORT_USER_KEYS
        )
    users_to_write = {
        uid: u for uid, u in users.items() if user_matches_export_keys(u, active_keys)
    }
    if active_keys and not users_to_write:
        sample = ", ".join(
            f"{u['phone']}/{u['id'][:8]}…" for u in list(users.values())[:5]
        )
        sys.exit(
            "No users matched EXPORT_USER_KEYS. "
            f"Keys={active_keys!r}. Sample dump users: {sample or '(none)'}"
        )

    def _user_has_exportable_content(uid: str) -> bool:
        return bool(conv_by_user[uid] or stories_by_user[uid] or chap_by_user[uid])

    users_with_content = {
        uid: u for uid, u in users_to_write.items() if _user_has_exportable_content(uid)
    }
    skipped_empty = len(users_to_write) - len(users_with_content)
    if skipped_empty:
        print(
            f"Skipped {skipped_empty} user(s) with no conversations, stories, or chapters"
        )

    OUT_DIR.mkdir(parents=True, exist_ok=True)

    if active_keys:
        print(
            f"Filter: {len(active_keys)} key(s) -> {len(users_to_write)} user(s) "
            f"-> {len(users_with_content)} with exportable content"
        )
    else:
        print(f"Export all: {len(users_with_content)} user(s) with exportable content")

    for uid, u in sorted(
        users_with_content.items(), key=lambda x: x[1].get("phone", "")
    ):
        label = u["nickname"] or u["phone"] or uid[:8]
        fname = f"{safe_filename(label)}_{uid}.md"
        path = OUT_DIR / fname

        lines_out: list[str] = []
        lines_out.append(f"# 用户导出: {label}")
        lines_out.append("")
        lines_out.append(f"- **User ID:** `{uid}`")
        lines_out.append(f"- **Phone:** {u['phone']}")
        if u.get("email"):
            lines_out.append(f"- **Email:** {u['email']}")
        lines_out.append("")
        lines_out.append("---")
        lines_out.append("")
        lines_out.append("## 对话记录（用户 + AI）")
        lines_out.append("")

        user_convs = sorted(conv_by_user[uid], key=lambda c: c["started_at"])
        if not user_convs:
            lines_out.append("（dump 中该用户无 conversations）")
            lines_out.append("")
        else:
            convs_with_segs = [cv for cv in user_convs if seg_by_conv[cv["id"]]]
            if not convs_with_segs:
                lines_out.append("（有会话但无 segments 轮次，或尚未落库）")
                lines_out.append("")
            else:
                for cv in convs_with_segs:
                    segs = sorted(seg_by_conv[cv["id"]], key=lambda s: s["created_at"])
                    lines_out.append(f"### 会话 `{cv['id']}`")
                    lines_out.append("")
                    lines_out.append(f"- 开始: {cv['started_at']}")
                    if cv.get("conversation_stage"):
                        lines_out.append(f"- 阶段: {cv['conversation_stage']}")
                    lines_out.append("")

                    for i, seg in enumerate(segs, 1):
                        lines_out.append(f"#### 轮次 {i} — {seg['created_at']}")
                        lines_out.append("")
                        if seg.get("audio_url"):
                            lines_out.append(f"- **音频:** `{seg['audio_url']}`")
                        lines_out.append("")
                        lines_out.append("**用户:**")
                        lines_out.append("")
                        lines_out.append(seg["transcript_text"] or "（空）")
                        lines_out.append("")
                        lines_out.append("**AI:**")
                        lines_out.append("")
                        lines_out.append(seg["agent_response"] or "（无回复）")
                        lines_out.append("")
                    lines_out.append("---")
                    lines_out.append("")

        lines_out.append("## 人生故事（stories）")
        lines_out.append("")

        user_stories = sorted(
            stories_by_user[uid],
            key=lambda s: (s["updated_at"], s["created_at"], s["title"]),
        )
        if not user_stories:
            lines_out.append("（无 story 行；表未进 dump 或用户暂无数据）")
            lines_out.append("")
        else:
            for st in user_stories:
                lines_out.append(f"### {st['title']}")
                lines_out.append("")
                meta_bits = [
                    f"`{st['id']}`",
                    f"status={st['status'] or '—'}",
                ]
                if st.get("stage"):
                    meta_bits.append(f"stage={st['stage']}")
                if st.get("story_type"):
                    meta_bits.append(f"type={st['story_type']}")
                lines_out.append("- " + " | ".join(meta_bits))
                if st.get("time_start") or st.get("time_end"):
                    lines_out.append(
                        f"- **时间:** {st['time_start'] or '—'} → {st['time_end'] or '—'}"
                    )
                if st.get("summary"):
                    lines_out.append("")
                    lines_out.append("**摘要:**")
                    lines_out.append("")
                    lines_out.append(st["summary"])
                if st.get("people_refs") or st.get("place_refs") or st.get("tag_refs"):
                    lines_out.append("")
                    if st.get("people_refs"):
                        lines_out.append(f"- people_refs: `{st['people_refs'][:200]}`")
                    if st.get("place_refs"):
                        lines_out.append(f"- place_refs: `{st['place_refs'][:200]}`")
                    if st.get("tag_refs"):
                        lines_out.append(f"- tag_refs: `{st['tag_refs'][:200]}`")
                lines_out.append("")
                lines_out.append("**当前正文（canonical_markdown）:**")
                lines_out.append("")
                lines_out.append(st["canonical_markdown"] or "（空）")
                lines_out.append("")

                vers = sorted(
                    versions_by_story[st["id"]], key=lambda v: v["version_no"]
                )
                if vers:
                    lines_out.append("#### 版本历史（story_versions）")
                    lines_out.append("")
                    for v in vers:
                        lines_out.append(
                            f"- **v{v['version_no']}** `{v['id']}` @ {v['created_at']}"
                            + (
                                f" — {v['actor_type']}/{v['source_type']}"
                                if v["actor_type"] or v["source_type"]
                                else ""
                            )
                        )
                        if v.get("change_summary"):
                            lines_out.append(f"  - 变更说明: {v['change_summary']}")
                        lines_out.append("")
                        lines_out.append(v["markdown_snapshot"] or "（空快照）")
                        lines_out.append("")
                lines_out.append("---")
                lines_out.append("")

        lines_out.append("## 回忆录章节（生成正文）")
        lines_out.append("")

        user_chapters = sorted(
            chap_by_user[uid], key=lambda c: (c["order_index"], c["updated_at"])
        )
        if not user_chapters:
            lines_out.append("（无章节）")
            lines_out.append("")
        else:
            for ch in user_chapters:
                lines_out.append(f"### [{ch['order_index']}] {ch['title']}")
                lines_out.append("")
                lines_out.append(
                    f"- **ID:** `{ch['id']}` | **状态:** {ch['status']} | **分类:** {ch['category'] or '—'} | **updated:** {ch['updated_at']}"
                )
                lines_out.append("")
                lines_out.append(ch["content"])
                lines_out.append("")
                lines_out.append("---")
                lines_out.append("")

        path.write_text("\n".join(lines_out), encoding="utf-8")
        print(f"Wrote {path}")

    print(f"Done. {len(users_with_content)} users -> {OUT_DIR} (source: {sql_path})")


if __name__ == "__main__":
    main()