#!/usr/bin/env python3
"""
xce-gitea-sync: Sync cc-sdd specs and OpenWolf buglog to Gitea issues.

Reads .kiro/specs/<feature>/ (spec.json, brief.md, requirements.md, tasks.md)
and .wolf/buglog.json as ground truth. Creates/updates Gitea milestones, issues,
and labels to mirror the local state.

Sync is one-way: files -> Gitea. Never Gitea -> files.
Sync state (issue numbers) is stored in the source files for idempotency.

Usage:
    python scripts/gitea-sync.py                    # sync all specs + bugs
    python scripts/gitea-sync.py --spec <name>      # sync one spec
    python scripts/gitea-sync.py --bugs             # sync bugs only
    python scripts/gitea-sync.py --dry-run           # show what would change

Environment:
    GITEA_URL    - base URL (default: https://gitea.shenrs.eu)
    GITEA_TOKEN  - API token (required: write:issue, write:milestone scopes)
    GITEA_OWNER  - repo owner (default: nexa)
    GITEA_REPO   - repo name (default: xce)
"""

import argparse
import datetime
import hashlib
import json
import os
import re
import sys
import urllib.error
import urllib.parse
import urllib.request
from pathlib import Path


# ── Helpers ──────────────────────────────────────────────────────────────────

def die(msg):
    print(f"ERROR: {msg}", file=sys.stderr)
    sys.exit(1)


def warn(msg):
    print(f"WARN: {msg}", file=sys.stderr)


def _env(key, default=None, required=False):
    val = os.environ.get(key, default)
    if required and not val:
        die(f"{key} environment variable is required")
    return val


def _discover_gitea_token():
    """Discover Gitea API token from multiple sources.

    Priority:
    1. GITEA_TOKEN environment variable
    2. ~/.claude.json → mcpServers.gitea.env.GITEA_ACCESS_TOKEN
    3. GITEA_ACCESS_TOKEN environment variable
    """
    # Explicit override
    token = _env("GITEA_TOKEN")
    if token:
        return token

    # Try Claude Code MCP config
    claude_config_path = Path.home() / ".claude.json"
    if claude_config_path.exists():
        try:
            config = json.loads(claude_config_path.read_text())
            gitea_cfg = config.get("mcpServers", {}).get("gitea", {})
            token = gitea_cfg.get("env", {}).get("GITEA_ACCESS_TOKEN")
            if token:
                return token
        except (json.JSONDecodeError, OSError):
            pass

    # MCP env var
    return _env("GITEA_ACCESS_TOKEN")


# ── Configuration ────────────────────────────────────────────────────────────

GITEA_URL = _env("GITEA_URL", "https://gitea.shenrs.eu").rstrip("/")
GITEA_TOKEN = _discover_gitea_token()
GITEA_OWNER = _env("GITEA_OWNER", "nexa")
GITEA_REPO = _env("GITEA_REPO", "xce")

API_BASE = f"{GITEA_URL}/api/v1"
REPO_API = f"{API_BASE}/repos/{GITEA_OWNER}/{GITEA_REPO}"

# Project roots (relative to script or cwd)
SCRIPT_DIR = Path(__file__).resolve().parent
PROJECT_ROOT = SCRIPT_DIR.parent
SPECS_DIR = PROJECT_ROOT / ".kiro" / "specs"
BUGLOG_PATH = PROJECT_ROOT / ".wolf" / "buglog.json"


# ── Label Definitions ────────────────────────────────────────────────────────

LABELS = [
    # Spec phase labels
    {"name": "phase:requirements", "color": "6C5CE7",
     "description": "Spec requirements phase — EARS entries, acceptance criteria"},
    {"name": "phase:design", "color": "6C5CE7",
     "description": "Spec design phase — architecture, data flow, API contracts"},
    {"name": "phase:tasks", "color": "6C5CE7",
     "description": "Spec tasks phase — implementation task breakdown"},
    {"name": "phase:implementation", "color": "F39C12",
     "description": "Spec implementation phase — code in progress"},
    {"name": "phase:complete", "color": "27AE60",
     "description": "Spec complete — all tasks done, validated, merged"},
    # Top-level type labels
    {"name": "spec", "color": "3498DB",
     "description": "Spec-driven development tracked issue"},
    {"name": "bug", "color": "E74C3C",
     "description": "Bug found during development"},
    {"name": "bug:fixed", "color": "27AE60",
     "description": "Bug resolved and fix committed"},
    # State labels
    {"name": "blocked", "color": "E74C3C",
     "description": "Blocked on external dependency or upstream spec"},
]

# Map buglog tags to Gitea labels (prefix-based matching)
TAG_TO_LABEL = {
    "asan": "bug:asan",
    "ubsan": "bug:asan",
    "SEGV": "bug:crash",
    "double-free": "bug:crash",
    "heap-use-after-free": "bug:crash",
    "UAF": "bug:crash",
    "data-loss": "bug:data-loss",
    "race": "bug:race",
    "toctou": "bug:race",
    "data-race": "bug:race",
    "ha": "bug:ha",
    "raft": "bug:ha",
    "election": "bug:ha",
    "failover": "bug:ha",
}


def api_url(path):
    """Build full API URL. All paths are repo-scoped."""
    return f"{REPO_API}/{path.lstrip('/')}"


def request(method, path, body=None):
    """Make a Gitea API request. Returns (status, response_body) or None on 404."""
    url = api_url(path)
    data = json.dumps(body).encode("utf-8") if body else None

    req = urllib.request.Request(url, data=data, method=method)
    req.add_header("Authorization", f"token {GITEA_TOKEN}")
    req.add_header("Content-Type", "application/json")
    req.add_header("Accept", "application/json")

    try:
        with urllib.request.urlopen(req) as resp:
            return resp.status, json.loads(resp.read().decode("utf-8"))
    except urllib.error.HTTPError as e:
        if e.code == 404:
            return None, None
        body_text = ""
        try:
            body_text = e.read().decode("utf-8")
        except Exception:
            pass
        raise RuntimeError(
            f"Gitea API error: {method} {path} -> {e.code}\n{body_text}"
        ) from e
    except urllib.error.URLError as e:
        raise RuntimeError(
            f"Gitea API unreachable: {method} {path}\n{e.reason}"
        ) from e


# ── GiteaAPI ─────────────────────────────────────────────────────────────────

class GiteaAPI:
    """Minimal Gitea REST API wrapper for sync operations."""

    def __init__(self):
        self._labels_cache = None

    # Labels

    def list_labels(self):
        if self._labels_cache is None:
            _, labels = request("GET", "/labels")
            self._labels_cache = {l["name"]: l for l in (labels or [])}
        return self._labels_cache

    def ensure_label(self, name, color, description=""):
        existing = self.list_labels()
        if name in existing:
            return existing[name]
        warn(f"  + label '{name}'")
        _, label = request("POST", "/labels", {
            "name": name, "color": color, "description": description
        })
        if label:
            self._labels_cache[name] = label
        return label

    # Milestones

    def list_milestones(self, state="all"):
        _, milestones = request("GET", f"/milestones?state={state}")
        return {m["title"]: m for m in (milestones or [])}

    def create_milestone(self, title, description="", state="open"):
        _, milestone = request("POST", "/milestones", {
            "title": title, "description": description, "state": state
        })
        return milestone

    def update_milestone(self, milestone_id, **fields):
        request("PATCH", f"/milestones/{milestone_id}", fields)

    # Issues

    def list_issues(self, milestone_id=None, state="all"):
        """List issues, optionally filtered by milestone."""
        params = [f"state={state}"]
        if milestone_id is not None:
            params.append(f"milestone={milestone_id}")
        url = "?" + "&".join(params)
        _, issues = request("GET", f"/issues{url}")
        return issues or []

    def create_issue(self, title, body, milestone_id=None, labels=None,
                     state="open"):
        payload = {"title": title, "body": body, "state": state}
        if milestone_id:
            payload["milestone"] = milestone_id
        if labels:
            payload["labels"] = [int(l) if isinstance(l, (int, float)) else l
                                 for l in labels]
        _, issue = request("POST", "/issues", payload)
        return issue

    def update_issue(self, issue_number, **fields):
        """Update issue fields (state, title, body, milestone, labels)."""
        request("PATCH", f"/issues/{issue_number}", fields)


# ── Label Sync ───────────────────────────────────────────────────────────────

def ensure_all_labels(api):
    """Create any missing labels. Runs before issue/milestone creation."""
    for lbl in LABELS:
        api.ensure_label(lbl["name"], lbl["color"], lbl.get("description", ""))


# ── Bug Tag → Label Mapping ──────────────────────────────────────────────────

def bug_labels(bug_entry):
    """Derive Gitea labels from buglog tags."""
    labels = ["bug"]
    tags = [t.lower() for t in bug_entry.get("tags", [])]

    # Fixed bugs get bug:fixed label
    fix = bug_entry.get("fix", "")
    if fix and fix.strip():
        labels.append("bug:fixed")

    # Map known tag patterns to labels
    for tag in tags:
        for pattern, label in TAG_TO_LABEL.items():
            if pattern.lower() in tag:
                if label not in labels:
                    labels.append(label)

    # Ensure any needed labels exist in Gitea
    # (bug:asan, bug:crash, bug:data-loss, bug:ha, bug:race may not exist yet)
    extra_labels = {
        "bug:asan": ("9B59B6", "ASAN/UBSAN caught bug"),
        "bug:crash": ("C0392B", "SEGV/UAF/double-free crash"),
        "bug:data-loss": ("C0392B", "Committed data loss bug"),
        "bug:ha": ("E67E22", "HA/Raft/consensus bug"),
        "bug:race": ("F39C12", "Data race / TOCTOU bug"),
    }
    for lbl in labels:
        if lbl in extra_labels and lbl not in LABEL_NAMES:
            pass  # handled below

    return labels, extra_labels


LABEL_NAMES = {l["name"] for l in LABELS}


# ── Body Formatting ──────────────────────────────────────────────────────────

def bug_body(bug_entry):
    """Format a buglog entry as a Gitea issue body."""
    parts = []

    error = bug_entry.get("error_message", "")
    if error:
        parts.append("## Error\n")
        parts.append(error.strip())
        parts.append("")

    root_cause = bug_entry.get("root_cause", "")
    if root_cause:
        parts.append("## Root Cause\n")
        parts.append(root_cause.strip())
        parts.append("")

    fix = bug_entry.get("fix", "")
    if fix and fix.strip():
        parts.append("## Fix\n")
        parts.append(fix.strip())
        parts.append("")
    else:
        parts.append("## Fix\n")
        parts.append("*Not yet fixed*")
        parts.append("")

    file_ = bug_entry.get("file", "")
    if file_:
        parts.append("## Affected Files\n")
        for f in file_.split(","):
            f = f.strip()
            if f:
                parts.append(f"- `{f}`")
        parts.append("")

    tags = bug_entry.get("tags", [])
    if tags:
        parts.append("## Tags\n")
        parts.append(" ".join(f"`{t}`" for t in tags))
        parts.append("")

    related = bug_entry.get("related_bugs", [])
    if related:
        parts.append("## Related Bugs\n")
        for rb in related:
            parts.append(f"- {rb}")
        parts.append("")

    parts.append("---")
    parts.append(f"*Synced from `.wolf/buglog.json` "
                 f"({bug_entry.get('id', '?')})*")

    return "\n".join(parts)


def bug_title(bug_entry):
    """Build a short title from a buglog entry."""
    bid = bug_entry.get("id", "bug-?")
    error = bug_entry.get("error_message", "")
    # Take first sentence or first 100 chars
    first_line = error.split("\n")[0].strip()
    first_sentence = re.split(r'[.。]\s+', first_line)[0].strip()
    if not first_sentence:
        first_sentence = first_line
    if len(first_sentence) > 120:
        first_sentence = first_sentence[:117] + "..."
    return f"[{bid}] {first_sentence}"


def spec_requirements_body(spec_name, spec_data, brief_path, req_path, design_path):
    """Build body for the Requirements & Design phase issue."""
    parts = []
    parts.append(f"# {spec_name}: Requirements & Design")
    parts.append("")

    # Phase status from spec.json
    approvals = spec_data.get("approvals", {})
    req_approved = approvals.get("requirements", {}).get("approved", False)
    design_approved = approvals.get("design", {}).get("approved", False)
    phase = spec_data.get("phase", "unknown")

    parts.append(f"**Phase**: `{phase}`")
    parts.append(f"**Requirements**: {'✅ Approved' if req_approved else '⏳ Pending'}")
    parts.append(f"**Design**: {'✅ Approved' if design_approved else '⏳ Pending'}")
    parts.append("")

    # Extract requirements summary from requirements.md if available
    if req_path.exists():
        req_text = req_path.read_text()
        # Find the requirements summary table
        table_match = re.search(
            r'## Requirements Summary\s*\n(.*?)(?=\n## |\Z)',
            req_text, re.DOTALL
        )
        if table_match:
            parts.append("## Requirements")
            parts.append("")
            parts.append(table_match.group(1).strip())
            parts.append("")

    # Blockers
    blocked_on = spec_data.get("blocked_on", [])
    if blocked_on:
        parts.append("## Blockers")
        parts.append("")
        for b in blocked_on:
            parts.append(f"- {b}")
        parts.append("")

    parts.append("---")
    parts.append(f"See: `.kiro/specs/{spec_name}/`")

    return "\n".join(parts)


def spec_implementation_body(spec_name, spec_data, tasks_path):
    """Build body for the Implementation phase issue."""
    parts = []
    parts.append(f"# {spec_name}: Implementation")
    parts.append("")

    # Phase status
    tasks_approved = spec_data.get("approvals", {}).get("tasks", {}).get("approved", False)
    ready = spec_data.get("ready_for_implementation", False)
    parts.append(f"**Tasks generated**: {tasks_approved}")
    parts.append(f"**Ready for implementation**: {ready}")
    parts.append("")

    # Task checklist from tasks.md
    if tasks_path.exists():
        tasks_text = tasks_path.read_text()
        # Extract - [ ] / - [x] checklist items
        tasks = re.findall(r'^(\s*- \[([ x])\]\s+.+)$', tasks_text, re.MULTILINE)
        if tasks:
            parts.append("## Tasks")
            parts.append("")
            for line, status in tasks:
                parts.append(line.strip())
            parts.append("")

    # Blockers
    blocked_on = spec_data.get("blocked_on", [])
    if blocked_on:
        parts.append("## Blockers")
        parts.append("")
        for b in blocked_on:
            parts.append(f"- {b}")
        parts.append("")

    parts.append("---")
    parts.append(f"See: `.kiro/specs/{spec_name}/tasks.md`")

    return "\n".join(parts)


def spec_validation_body(spec_name, spec_data):
    """Build body for the Validation & Closure phase issue."""
    parts = []
    parts.append(f"# {spec_name}: Validation & Closure")
    parts.append("")

    phase = spec_data.get("phase", "unknown")
    approvals = spec_data.get("approvals", {})
    open_phases = [
        k for k, v in approvals.items()
        if v.get("generated") and not v.get("approved")
    ]

    if "complete" in phase or (
        approvals.get("implementation") and
        approvals["implementation"].get("approved")
    ):
        parts.append("**Status**: ✅ Complete")
    elif open_phases:
        parts.append(f"**Status**: ⏳ Pending — awaiting: {', '.join(open_phases)}")
    else:
        parts.append("**Status**: ⏳ Future")

    parts.append("")
    parts.append("## Acceptance Gates")
    parts.append("")
    parts.append("- [ ] All requirements verified")
    parts.append("- [ ] Full test suite passes")
    parts.append("- [ ] HA soak validation passes")
    parts.append("- [ ] Code review sign-off")
    parts.append("- [ ] Spec marked complete in spec.json")
    parts.append("")

    blocked_on = spec_data.get("blocked_on", [])
    if blocked_on:
        parts.append("## Blockers")
        parts.append("")
        for b in blocked_on:
            parts.append(f"- {b}")
        parts.append("")

    parts.append("---")
    parts.append(f"See: `.kiro/specs/{spec_name}/`")

    return "\n".join(parts)


# ── Spec Sync ────────────────────────────────────────────────────────────────

PHASE_DEFS = [
    {
        "key": "requirements_design",
        "title_suffix": "Requirements & Design",
        "labels": ["spec", "phase:requirements", "phase:design"],
        "body_fn": spec_requirements_body,
        "body_fn_extra": lambda n, d: spec_requirements_body(
            n, d,
            SPECS_DIR / n / "brief.md",
            SPECS_DIR / n / "requirements.md",
            SPECS_DIR / n / "design.md",
        ),
    },
    {
        "key": "implementation",
        "title_suffix": "Implementation",
        "labels": ["spec", "phase:implementation"],
        "body_fn": lambda n, d: spec_implementation_body(
            n, d, SPECS_DIR / n / "tasks.md"
        ),
        "body_fn_extra": None,
    },
    {
        "key": "validation",
        "title_suffix": "Validation & Closure",
        "labels": ["spec", "phase:complete"],
        "body_fn": lambda n, d: spec_validation_body(n, d),
        "body_fn_extra": None,
    },
]


def sync_spec(api, spec_name, dry_run=False, quiet=False):
    """Sync one spec directory to Gitea milestone + phase issues."""
    spec_dir = SPECS_DIR / spec_name
    spec_json_path = spec_dir / "spec.json"

    if not spec_json_path.exists():
        if not quiet:
            print(f"SKIP {spec_name}: no spec.json")
        return

    spec_data = json.loads(spec_json_path.read_text())
    gitea_state = spec_data.get("gitea", {})

    # Check for already-synced state
    if gitea_state.get("milestone_id") and gitea_state.get("issues"):
        if all(
            k in gitea_state["issues"]
            for k in ["requirements_design", "implementation", "validation"]
        ):
            # Already synced — check if phase states need update
            _sync_spec_phase_states(api, spec_name, spec_data, gitea_state,
                                    dry_run, quiet)
            return

    # Need to create milestone + issues (or adopt existing)
    if not quiet:
        print(f"SYNC spec: {spec_name}")

    if dry_run:
        print(f"  [DRY-RUN] create milestone '{spec_name}'")
        for phase_def in PHASE_DEFS:
            title = f"[{spec_name}] {phase_def['title_suffix']}"
            print(f"  [DRY-RUN] create issue '{title}'")
        return

    # Try to adopt existing milestone
    milestone = None
    existing_milestones = api.list_milestones()
    if spec_name in existing_milestones:
        milestone = existing_milestones[spec_name]
        if not quiet:
            print(f"  adopting existing milestone #{milestone['id']}")
    else:
        milestone = api.create_milestone(
            spec_name,
            description=_spec_milestone_desc(spec_name, spec_data),
            state="open"
        )
        if not quiet:
            print(f"  created milestone #{milestone['id']}")

    if not milestone:
        warn(f"  could not find or create milestone for '{spec_name}'")
        return

    # Create phase issues
    milestone_id = milestone["id"]
    phase_issues = {}

    for phase_def in PHASE_DEFS:
        title = f"[{spec_name}] {phase_def['title_suffix']}"

        # Determine if this phase issue should start closed
        state = "open"
        if phase_def["key"] == "requirements_design":
            approvals = spec_data.get("approvals", {})
            req_ok = approvals.get("requirements", {}).get("approved", False)
            des_ok = approvals.get("design", {}).get("approved", False)
            if req_ok and des_ok:
                state = "closed"

        # Build body
        if phase_def.get("body_fn_extra"):
            body = phase_def["body_fn_extra"](spec_name, spec_data)
        else:
            body = phase_def["body_fn"](spec_name, spec_data)

        # Determine labels (use label IDs if available)
        label_ids = _resolve_label_ids(api, phase_def["labels"])

        issue = api.create_issue(
            title, body, milestone_id=milestone_id,
            labels=label_ids, state=state
        )
        phase_issues[phase_def["key"]] = issue["number"]
        if not quiet:
            state_mark = " (closed)" if state == "closed" else ""
            print(f"  created issue #{issue['number']}: {title}{state_mark}")

    # Write sync state back to spec.json
    spec_data["gitea"] = {
        "milestone_id": milestone_id,
        "issues": phase_issues,
    }
    _write_json(spec_json_path, spec_data)


def _sync_spec_phase_states(api, spec_name, spec_data, gitea_state,
                            dry_run, quiet):
    """Update issue states + milestone based on current approvals."""
    if dry_run:
        # In dry-run mode, just report what would be checked
        print(f"  [DRY-RUN] check phase states for '{spec_name}'")
        return

    approvals = spec_data.get("approvals", {})
    req_ok = approvals.get("requirements", {}).get("approved", False)
    des_ok = approvals.get("design", {}).get("approved", False)
    tasks_ok = approvals.get("tasks", {}).get("approved", False)
    impl_ok = approvals.get("implementation", {}).get("approved", False)

    issues = gitea_state.get("issues", {})

    # Build desired states for each phase issue
    desired = {}
    rd_issue = issues.get("requirements_design")
    if rd_issue:
        desired[rd_issue] = "closed" if (req_ok and des_ok) else "open"
    impl_issue = issues.get("implementation")
    if impl_issue:
        desired[impl_issue] = "closed" if impl_ok else "open"
    val_issue = issues.get("validation")
    if val_issue:
        desired[val_issue] = "closed" if impl_ok else "open"

    # Fetch existing issues once
    existing_issues = api.list_issues(
        milestone_id=gitea_state.get("milestone_id"), state="all"
    )

    # Update any issues whose state doesn't match desired
    for issue_num, target_state in desired.items():
        current = next(
            (i for i in existing_issues if i["number"] == issue_num), None
        )
        if current and current.get("state") != target_state:
            api.update_issue(issue_num, state=target_state)
            if not quiet:
                label = str(issue_num)
                print(f"  issue #{issue_num}: "
                      f"{current['state']} -> {target_state}")

    # Update milestone state
    all_approved = req_ok and des_ok and tasks_ok and impl_ok
    milestone_id = gitea_state.get("milestone_id")
    if all_approved and milestone_id:
        all_milestones = api.list_milestones(state="all")
        ms = all_milestones.get(spec_name)
        if ms and ms.get("state") != "closed":
            api.update_milestone(milestone_id, state="closed")
            if not quiet:
                print(f"  closed milestone '{spec_name}'")


def _spec_milestone_desc(spec_name, spec_data):
    """Build milestone description from spec data."""
    phase = spec_data.get("phase", "unknown")
    blocked = spec_data.get("blocked_on", [])
    created = spec_data.get("created_at", "")
    parts = [f"Spec-driven development for {spec_name}."]
    parts.append(f"Phase: {phase}")
    if blocked:
        parts.append(f"Blocked on: {', '.join(blocked)}")
    parts.append(f"Created: {created}")
    return "\n".join(parts)


def _resolve_label_ids(api, label_names):
    """Convert label names to IDs for issue creation."""
    existing = api.list_labels()
    ids = []
    for name in label_names:
        if name in existing:
            ids.append(existing[name]["id"])
    return ids


# ── Bug Sync ─────────────────────────────────────────────────────────────────

def sync_bugs(api, dry_run=False, quiet=False, since=None):
    """Sync buglog entries to Gitea issues.

    Args:
        since: Only sync bugs with last_seen >= this date (ISO format: YYYY-MM-DD).
               Helps avoid flooding Gitea with ancient auto-detected bugs.
    """
    if not BUGLOG_PATH.exists():
        warn(f"buglog not found: {BUGLOG_PATH}")
        return

    buglog = json.loads(BUGLOG_PATH.read_text())
    created = 0
    closed = 0
    skipped = 0

    for i, bug in enumerate(buglog):
        bid = bug.get("id", f"bug-{i:04d}")

        # Apply --since filter
        if since:
            last_seen = bug.get("last_seen", "")
            if last_seen < since:
                skipped += 1
                continue

        gitea_issue_num = bug.get("gitea_issue")

        if gitea_issue_num:
            # Already synced — check if state changed
            fix_now = bool(bug.get("fix", "").strip())
            # We don't track previous fix state, so check Gitea
            try:
                _, issue = request("GET", f"/issues/{gitea_issue_num}")
                if issue and issue.get("state") == "open" and fix_now:
                    if dry_run:
                        print(f"  [DRY-RUN] close bug #{gitea_issue_num}: {bid}")
                    else:
                        api.update_issue(gitea_issue_num, state="closed")
                        # Add bug:fixed label via API
                        request(
                            "PUT",
                            f"/issues/{gitea_issue_num}/labels",
                            {"labels": [api.list_labels().get("bug:fixed", {}).get("id", 0)]}
                        )
                        if not quiet:
                            print(f"  closed #{gitea_issue_num}: {bid}")
                    closed += 1
                else:
                    skipped += 1
            except Exception as e:
                warn(f"  {bid}: could not check issue #{gitea_issue_num}: {e}")
                skipped += 1
            continue

        # New bug — create issue
        title = bug_title(bug)
        body = bug_body(bug)
        fix = bug.get("fix", "").strip()
        state = "closed" if fix else "open"

        if dry_run:
            print(f"  [DRY-RUN] create {'CLOSED' if state == 'closed' else 'OPEN'} "
                  f"issue: {title}")
            created += 1
            continue

        # Determine labels
        labels, extra = bug_labels(bug)
        for ename, (ecolor, edesc) in extra.items():
            if ename in labels:
                api.ensure_label(ename, ecolor, edesc)

        label_ids = _resolve_label_ids(api, labels)

        issue = api.create_issue(title, body, labels=label_ids, state=state)
        bug["gitea_issue"] = issue["number"]
        state_mark = " (closed)" if state == "closed" else ""
        if not quiet:
            print(f"  created #{issue['number']}: {title}{state_mark}")
        created += 1

    # Write back updated buglog if any new issues were created
    if created > 0 and not dry_run:
        _write_json(BUGLOG_PATH, buglog)

    if not quiet:
        print(f"Bugs: {created} created, {closed} closed, {skipped} skipped")


# ── JSON Writing ─────────────────────────────────────────────────────────────

def _write_json(path, data):
    """Write JSON back to file, preserving newline style to match existing."""
    text = json.dumps(data, indent=2, ensure_ascii=False)
    # Preserve trailing newline
    if not text.endswith("\n"):
        text += "\n"
    path.write_text(text)


# ── Main ─────────────────────────────────────────────────────────────────────

def main():
    parser = argparse.ArgumentParser(
        description="Sync cc-sdd specs and OpenWolf buglog to Gitea issues"
    )
    parser.add_argument("--dry-run", action="store_true",
                        help="Show what would change, don't call API")
    parser.add_argument("--spec", metavar="NAME",
                        help="Sync only one spec (by directory name)")
    parser.add_argument("--bugs", action="store_true",
                        help="Sync bugs only")
    parser.add_argument("--since", metavar="DATE",
                        help="Only sync bugs with last_seen >= DATE (YYYY-MM-DD)")
    parser.add_argument("--quiet", action="store_true",
                        help="Suppress progress output, print only errors")
    args = parser.parse_args()

    # Validate environment
    if not args.dry_run:
        if not GITEA_TOKEN:
            die("GITEA_TOKEN not set. Use --dry-run to preview without token.")
        api = GiteaAPI()
        ensure_all_labels(api)
    else:
        api = None

    if not args.quiet:
        print(f"Gitea: {GITEA_URL}/api/v1/repos/{GITEA_OWNER}/{GITEA_REPO}")
        if args.dry_run:
            print("Mode: DRY-RUN (no changes)")

    # Sync specs
    if not args.bugs:
        if args.spec:
            spec_dirs = [args.spec]
        elif SPECS_DIR.exists():
            spec_dirs = [
                d.name for d in SPECS_DIR.iterdir()
                if d.is_dir() and (d / "spec.json").exists()
            ]
        else:
            spec_dirs = []

        for spec_name in sorted(spec_dirs):
            sync_spec(api, spec_name, dry_run=args.dry_run, quiet=args.quiet)

    # Sync bugs
    if not args.spec:
        sync_bugs(api, dry_run=args.dry_run, quiet=args.quiet, since=args.since)

    if not args.quiet:
        if args.dry_run:
            print("Done (dry-run — no changes made)")
        else:
            print("Done")


if __name__ == "__main__":
    main()