"""Local reports and community sharing."""

from pathlib import Path
import json
import os
import re
import sys
import urllib.error
import urllib.request
from vlib import ctx
from vlib.ui import _fail, _noninteractive, _note, _now_iso, _ok, _say, _step, _warn
from vlib.net import _get_hf_token, _parse_retry_after
from vlib.tensors import _is_gguf_file, read_safetensors
from vlib.sources import _family, _public_source, detect_output_tensor, largest_2d
from vlib.registry import _append_report, _iter_voices, _read_meta, _registry_resolve


def _hash_file(path):
    import hashlib
    h = hashlib.sha256()
    with open(path, "rb") as f:
        while True:
            b = f.read(8 << 20)
            if not b:
                break
            h.update(b)
    return h.hexdigest()


def _sanitize_note(s):
    if s is None:
        return None
    s = str(s).replace("\r", " ").replace("\n", " ").replace("\x00", " ")
    s = re.sub(r"\s+", " ", s).strip()
    if not s:
        return None
    # strip CSV injection prefixes
    if s and s[0] in "=+@-":
        s = "'" + s
    if len(s) > 240:
        s = s[:239] + "…"
    return s


def _sanitize_reporter(s):
    if not s:
        return None
    s = re.sub(r"[^A-Za-z0-9._-]", "_", str(s).strip())[:64].strip("_")
    return s or None


def _prompt_share(args, preview=None):
    if getattr(args, "no_push", False):
        return False
    if getattr(args, "yes", False):
        return True
    if _noninteractive(args):
        return False
    if preview:
        _say(f"  Will share: {preview}")
    try:
        ans = input("  Leave a breadcrumb to help the next person? [y/N] (N): ").strip().lower()
    except (EOFError, KeyboardInterrupt):
        _say("  ⚠ Cancelled.")
        sys.exit(1)
    return ans in ("y", "yes")


def _sync_pending():
    """Sync outbox without creating anything. Shared by sync-only mode."""
    pending = sorted(ctx.REPORTS_OUTBOX.glob("*.json"))
    if not pending:
        _say("  No pending reports to sync.")
        return
    _step(f"Syncing {len(pending)} pending report(s)…")
    recs = []
    for p in pending:
        try:
            recs.append(json.loads(p.read_text()))
        except Exception as e:
            _warn(f"  Could not read {p.name}: {e}")
    if recs:
        n = _push_reports_batch(recs)
        if n < len(recs):
            _warn(f"  Synced {n}/{len(recs)} report(s) — rest stay queued.")
        else:
            _ok(f"Synced {n}/{len(recs)} report(s).")
    return


def _push_reports_batch(records):
    """Batch push: group by shard, single fetch+upload per shard. Returns pushed count.
    Non-collaborators lack write access to Wiself/voice-reports → fallback to PR (create_pr=True).
    Fixes tempfile.mktemp racy API → mkstemp 0600; 3 retries on 429/409/412.
    Note: download-modify-upload still racy for direct pushes (two owners racing may lose);
    dedup on report_id softens it, and PR path eliminates race for crowd (each PR is isolated)."""
    import time, tempfile
    if not records:
        return 0
    tok = _get_hf_token()
    if not tok:
        _warn("  No HF token — saved to outbox only. Run: voice auth")
        return 0
    try:
        from huggingface_hub import HfApi
        from huggingface_hub import CommitOperationAdd
        api = HfApi(token=tok)
    except Exception as e:
        _warn(f"  huggingface_hub not available ({e}) — kept in outbox.")
        return 0
    try:
        api.create_repo(repo_id=ctx.REPORTS_DATASET_ID, repo_type="dataset", exist_ok=True)
    except Exception:
        pass
    from collections import defaultdict
    by_shard = defaultdict(list)
    for r in records:
        shard = f"{ctx.REPORTS_REMOTE_PREFIX}{r['ts'][:7]}.jsonl"
        by_shard[shard].append(r)
    pushed = 0
    for shard, recs in by_shard.items():
        for attempt in range(3):
            try:
                existing = ""
                try:
                    from huggingface_hub import hf_hub_download
                    tmp = hf_hub_download(repo_id=ctx.REPORTS_DATASET_ID, repo_type="dataset", filename=shard, token=tok)
                    existing = Path(tmp).read_text(encoding="utf-8", errors="replace")
                except Exception:
                    existing = ""
                # parse existing_ids properly (not substring) for correct dedup
                existing_ids = set()
                if existing:
                    for line in existing.splitlines():
                        if not line.strip():
                            continue
                        try:
                            existing_ids.add(json.loads(line).get("report_id"))
                        except Exception:
                            continue
                # headroom check per Tim Cook: warn if shard near 10k
                if len(existing_ids) > 10000:
                    _warn(f"  Shard {shard} has {len(existing_ids)} reports — consider rotation (reports-YYYY-MM-2).")
                todo = [r for r in recs if r["report_id"] not in existing_ids]
                if not todo:
                    for r in recs:
                        try:
                            (ctx.REPORTS_OUTBOX / f"{r['report_id']}.json").unlink(missing_ok=True)
                        except Exception:
                            pass
                    pushed += len(recs)
                    break
                if not existing:
                    new_content = "\n".join(json.dumps(r, ensure_ascii=False, separators=(",", ":")) for r in todo) + "\n"
                else:
                    if not existing.endswith("\n"):
                        existing += "\n"
                    new_content = existing + "\n".join(json.dumps(r, ensure_ascii=False, separators=(",", ":")) for r in todo) + "\n"
                # mkstemp 0600, not deprecated mktemp
                fd_tmp, tmp_path = tempfile.mkstemp(prefix="voice-report-")
                tmpf = Path(tmp_path)
                try:
                    os.write(fd_tmp, new_content.encode("utf-8"))
                    try:
                        os.fsync(fd_tmp)
                    except Exception:
                        pass
                finally:
                    try:
                        os.close(fd_tmp)
                    except Exception:
                        pass
                try:
                    os.chmod(tmpf, 0o600)
                except Exception:
                    pass
                # try direct push first; on 403 (no write access) fallback to PR
                try:
                    api.upload_file(path_or_fileobj=str(tmpf), path_in_repo=shard, repo_id=ctx.REPORTS_DATASET_ID, repo_type="dataset", commit_message=f"report batch {len(todo)} -> {shard}")
                except Exception as e_direct:
                    is_403 = False
                    try:
                        from huggingface_hub.utils import HfHubHTTPError as _HE
                        if isinstance(e_direct, _HE) and getattr(e_direct.response, "status_code", None) == 403:
                            is_403 = True
                        elif "403" in str(e_direct) or "Forbidden" in str(e_direct):
                            is_403 = True
                    except Exception:
                        pass
                    if is_403:
                        _step("  No write access — creating pull request…")
                        api.create_commit(
                            repo_id=ctx.REPORTS_DATASET_ID,
                            repo_type="dataset",
                            operations=[CommitOperationAdd(path_in_repo=shard, path_or_fileobj=str(tmpf))],
                            commit_message=f"report batch {len(todo)} -> {shard} ({todo[0]['report_id'][:8]}…)",
                            create_pr=True,
                        )
                        _ok("  PR opened — thank you! Maintainer will merge shortly.")
                    else:
                        raise
                try:
                    tmpf.unlink(missing_ok=True)
                except Exception:
                    pass
                for r in todo:
                    try:
                        (ctx.REPORTS_OUTBOX / f"{r['report_id']}.json").unlink(missing_ok=True)
                    except Exception:
                        pass
                pushed += len(todo)
                break
            except Exception as e:
                try:
                    from huggingface_hub.utils import HfHubHTTPError as _HE
                    code = getattr(getattr(e, "response", None), "status_code", None)
                    if isinstance(e, _HE) and code in (429, 409, 412):
                        ra = _parse_retry_after(getattr(e.response, "headers", {}) or {})
                        time.sleep(ra or (0.7 * (2 ** attempt)))
                        continue
                    # 403 already handled via PR above; other 403 should not retry as direct
                    if isinstance(e, _HE) and code == 403:
                        # if PR also failed, keep in outbox
                        _warn(f"  Push failed for {shard} (403 Forbidden) — kept in outbox. PR fallback also failed.")
                        break
                except Exception:
                    pass
                if attempt < 2 and isinstance(e, (urllib.error.URLError, TimeoutError, OSError)):
                    time.sleep(0.7 * (2 ** attempt))
                    continue
                if attempt >= 2:
                    if ctx.VERBOSE:
                        import traceback
                        _say(traceback.format_exc())
                    _warn(f"  Push failed for {shard} ({type(e).__name__}: {e}) — kept in outbox.")
                    break
                time.sleep(0.7 * (2 ** attempt))
    return pushed


def _push_report(record):
    return _push_reports_batch([record]) == 1


def _last_operation():
    try:
        if not ctx.OPERATIONS_LOG.exists():
            return None
        # read last non-empty line
        with open(ctx.OPERATIONS_LOG, "rb") as f:
            f.seek(0, 2)
            size = f.tell()
            if size == 0:
                return None
            # read tail 8KB
            read = min(size, 8192)
            f.seek(size - read)
            tail = f.read().decode("utf-8", "replace").strip().splitlines()
            for line in reversed(tail):
                if not line.strip():
                    continue
                try:
                    rec = json.loads(line)
                    op = rec.get("op")
                    if op:
                        return op
                except Exception:
                    continue
    except Exception:
        pass
    return None


def cmd_report(args):
    msg = _sanitize_note(getattr(args, "message", None))
    voice_arg = getattr(args, "voice", None)
    target_raw = getattr(args, "target", None)
    if getattr(args, "sync", False) and not (msg or voice_arg or target_raw):
        # Sync-only: never mint a report just to sync.
        _sync_pending()
        return
    if not msg:
        _fail('  ✗ Empty note — pass -m "what you tried, what happened".')
    if isinstance(getattr(args, "message", None), str) and len(getattr(args, "message")) > 240:
        _note("  Note truncated to 240 chars.")
    import uuid, platform
    report_id = uuid.uuid4().hex
    ts = _now_iso()
    # auto-pull voice provenance
    _voice_missed = None
    voice_meta = None
    voice_name = _sanitize_note(voice_arg.strip()) if voice_arg and voice_arg.strip() else None
    try:
        if voice_arg:
            vp, vm = _registry_resolve(voice_arg)
            if vp and vp.exists():
                if vm is None:
                    vm = _read_meta(Path(vp).parent / "voice.json")
                voice_meta = dict(vm or {})
                if "tensor_sha256" not in voice_meta and vp.exists():
                    try:
                        voice_meta["tensor_sha256"] = _hash_file(str(vp))
                    except Exception:
                        pass
            else:
                _voice_missed = voice_arg
                voices = sorted([d for d in _iter_voices() if (d / "voice.json").exists()], key=lambda p: p.stat().st_mtime, reverse=True)
                if voices:
                    vm = _read_meta(voices[0] / "voice.json")
                    if vm:
                        voice_meta = dict(vm)
                        if not voice_name:
                            voice_name = _sanitize_note(vm.get("name") or voices[0].name)
        else:
            # zero flags: auto-pull most recent voice for full traceability
            voices = sorted([d for d in _iter_voices() if (d / "voice.json").exists()], key=lambda p: p.stat().st_mtime, reverse=True)
            if voices:
                vm = _read_meta(voices[0] / "voice.json")
                if vm:
                    voice_meta = dict(vm)
                    if not voice_name:
                        voice_name = _sanitize_note(vm.get("name") or voices[0].name)
    except Exception:
        pass
    if _voice_missed:
        _warn(f"  Voice '{_voice_missed}' not in registry — note saved without its provenance.")
    target_basename = _sanitize_note(Path(target_raw).name) if target_raw else None
    target_info = None
    if target_raw and Path(target_raw).expanduser().exists():
        try:
            p = Path(target_raw).expanduser()
            if _is_gguf_file(str(p)):
                from gguf import GGUFReader
                r = GGUFReader(str(p))
                arch = None
                for fld in r.fields.values():
                    if fld.name == "general.architecture":
                        try:
                            v = fld.parts[fld.data[0]]
                            if isinstance(v, bytes):
                                arch = v.decode()
                            elif hasattr(v, "tobytes"):
                                try:
                                    arch = v.tobytes().decode()
                                except Exception:
                                    arch = str(v)
                            else:
                                arch = str(v)
                            arch = arch.strip("\x00").strip()
                        except Exception:
                            pass
                        break
                # find output tensor
                tname = None
                for pref in ("output.weight", "token_embd.weight"):
                    for t in r.tensors:
                        if t.name == pref:
                            tname = t.name
                            break
                    if tname:
                        break
                shape = None
                dtype = None
                if tname:
                    for t in r.tensors:
                        if t.name == tname:
                            shape = list(reversed([int(x) for x in t.shape]))
                            dtype = t.tensor_type.name
                            break
                target_info = {"basename": target_basename, "format": "gguf", "tensor_name": tname, "architecture": arch, "family": _family(arch), "shape": shape, "dtype": dtype}
            else:
                # try safetensors probe (header only)
                try:
                    hdr, tens = read_safetensors(str(p))
                    # pick output tensor
                    tname = detect_output_tensor(list(tens.keys()), None) or largest_2d(list(tens.keys()), {k: v["shape"] for k, v in tens.items()})
                    info = tens.get(tname) if tname else None
                    target_info = {"basename": target_basename, "format": "safetensors", "tensor_name": tname, "shape": list(info["shape"]) if info else None, "dtype": info["dtype"] if info else None}
                except Exception:
                    target_info = {"basename": target_basename, "format": "safetensors"}
        except Exception:
            pass
    if target_info is None and target_basename:
        target_info = {"basename": target_basename}
    # env enrichment
    try:
        import numpy as _np
        np_ver = getattr(_np, "__version__", None)
    except Exception:
        np_ver = None
    try:
        import gguf as _gg
        gg_ver = getattr(_gg, "__version__", "installed")
    except Exception:
        gg_ver = None
    env_info = {"voice_ver": ctx.VERSION, "python": platform.python_version(), "platform": platform.platform(), "numpy": np_ver, "gguf": gg_ver}
    operation = getattr(args, "operation", None) or _last_operation() or "report"
    record = {
        "v": 2,
        "report_id": report_id,
        "ts": ts,
        "voice": voice_name,
        "voice_meta": voice_meta,
        "target": target_basename,
        "target_meta": target_info,
        "operation": operation,
        "status": "ok",
        "message": msg,
        "env": env_info,
    }
    # keep backward compat flat fields for old dataset readers
    if voice_meta:
        record["voice_source"] = _public_source(voice_meta.get("source_hf_model") or voice_meta.get("source"))
        record["voice_tensor"] = voice_meta.get("tensor_name")
        record["voice_dtype"] = voice_meta.get("dtype")
        record["voice_shape"] = voice_meta.get("shape")
    reporter = _sanitize_reporter(getattr(args, "reporter", None))
    if reporter:
        record["reporter"] = reporter
    # auto-reporter from HF token if available (opt-in via --reporter not set)
    if "reporter" not in record:
        # do not auto-fill PII; keep null unless user opted
        pass
    # validate size
    try:
        rec_json = json.dumps(record, ensure_ascii=False)
        if len(rec_json) > 4096:
            _warn("  Note too large — truncating.")
            record["message"] = _sanitize_note((msg or "")[:240])
    except Exception:
        pass
    _append_report(record)
    _ok(f"Thanks for noting — saved locally ({report_id[:8]}…) → {ctx.REPORTS_JSONL}")
    _say(f"  Outbox: {ctx.REPORTS_OUTBOX / (report_id + '.json')} (private, stays until you choose to share)")
    # also handle --sync of pending (record already saved above)
    if getattr(args, "sync", False):
        _sync_pending()
        return
    # warm preview — what will be shared
    preview = None
    try:
        pv = voice_name or (voice_meta.get("name") if voice_meta else None) or "—"
        pt = (voice_meta.get("tensor_name") if voice_meta else None) or (target_info.get("tensor_name") if target_info else None) or "—"
        ps = voice_meta.get("shape") if voice_meta and voice_meta.get("shape") else (target_info.get("shape") if target_info else None)
        pd = voice_meta.get("dtype") if voice_meta and voice_meta.get("dtype") else (target_info.get("dtype") if target_info else None)
        pv_str = f"voice: {pv}, tensor: {pt}"
        if ps:
            pv_str += f" {ps}"
        if pd:
            pv_str += f" {pd}"
        if target_basename:
            pv_str += f", target: {target_basename}"
            if target_info and target_info.get("family"):
                pv_str += f" {target_info.get('family')}"
        preview = pv_str
    except Exception:
        preview = None
    should_push = _prompt_share(args, preview=preview)
    if should_push:
        _step("Sharing to community to help others…")
        ok = _push_report(record)
        if ok:
            _ok("Shared to community — thank you! Helps the next person.")
            pending = sorted(ctx.REPORTS_OUTBOX.glob("*.json"))
            if pending:
                recs = []
                for p in pending:
                    try:
                        recs.append(json.loads(p.read_text()))
                    except Exception:
                        continue
                if recs:
                    _step(f"Syncing {len(recs)} pending report(s)…")
                    _push_reports_batch(recs)
            # headroom warning
            try:
                sz = ctx.REPORTS_JSONL.stat().st_size if ctx.REPORTS_JSONL.exists() else 0
                if sz > 50 * 1024 * 1024:
                    _warn(f"  reports.jsonl {sz/1e6:.1f} MB — consider archiving (rotation to reports-YYYY-MM.jsonl).")
                if len(list(ctx.REPORTS_OUTBOX.glob("*.json"))) > 5000:
                    _warn("  Outbox >5000 pending — run voice report --sync --yes to flush.")
            except Exception:
                pass
        else:
            _warn("  Share pending — will retry on next report or voice doctor.")
    else:
        _say("  Saved locally. Outbox retained for later push (rerun with --yes to share).")