"""Unified project endpoints for the new dashboard (Task #4 backend).

Replaces the old separate /api/workspace + /api/ralph payloads with a single
/api/projects view that merges:

  - workspace dirs (`~/workspace/<slug>/`)
  - approved-tasks.json entries
  - per-project Ralph PRD (`scripts/ralph/prd.json`)

Endpoints exposed via the mixin:

    GET  /api/projects                        — full list + version
    GET  /api/projects/signature              — change-detection hash for SSE
    GET  /api/projects/stream                 — SSE stream of changes
    GET  /api/projects/<slug>/plan/state
    GET  /api/projects/<slug>/plan/transcript

    POST /api/projects/propose
    POST /api/projects/approve                (If-Match: <version>)
    POST /api/projects/unapprove              (If-Match: <version>)
    POST /api/projects/cancel                 (If-Match: <version>)
    POST /api/projects/<slug>/plan/start
    POST /api/projects/<slug>/plan/respond
    POST /api/projects/<slug>/plan/finalize
    POST /api/projects/<slug>/plan/cancel
    POST /api/projects/<slug>/plan/advance

Status derivation (one of these strings — see `_derive_status`):

    running-ralph   — has PID, /proc/<pid>/cmdline contains ralph.sh
    running-manual  — has PID, alive, but not ralph.sh
    planning        — approved-tasks.json entry has status=planning
    approved        — entry has status=approved (waiting for night-execute)
    pending         — entry has status=pending
    blocked         — prd has stories, all incomplete are blocked
    failed          — prd has stories, last run had failures
    complete        — prd has stories, all passes==True
    idle            — workspace dir exists but no signal
"""
from __future__ import annotations

import hashlib
import json
import logging
import os
import subprocess
import sys
import time
from datetime import datetime, timezone
from pathlib import Path
from urllib.parse import parse_qs, urlparse

import constants

from handlers._validators import parse_json_body, validate_description, validate_slug

# Make `from src.x import ...` work — same trick youtube.py uses.
if str(constants.BASE_DIR) not in sys.path:
    sys.path.insert(0, str(constants.BASE_DIR))

log = logging.getLogger(__name__)

APPROVED_TASKS_FILE = constants.BASE_DIR / "approved-tasks.json"


class _StaleVersion(Exception):
    """Raised inside a write_approved mutator to abort on If-Match mismatch."""
    pass

# Module-level signature cache — only re-run `git status --porcelain` when the
# repo's `.git/index` mtime advances. Keeps SSE polling cheap.
_SIG_CACHE: dict = {"git_mtime": None, "signature": None, "ts": 0.0}


# ─── helpers ───────────────────────────────────────────────────────────


def _now_iso() -> str:
    return datetime.now(timezone.utc).isoformat()


def _read_approved() -> dict:
    """Read approved-tasks.json under a shared flock."""
    try:
        from src.jsonlock import read_locked  # type: ignore
        return read_locked(str(APPROVED_TASKS_FILE))
    except FileNotFoundError:
        return {"projects": [], "last_updated": None, "version": 0}
    except (json.JSONDecodeError, OSError) as exc:  # pragma: no cover
        log.error("approved-tasks.json read failed: %s", exc)
        return {"projects": [], "last_updated": None, "version": 0}


def _write_approved(mutator):
    """Persist approved-tasks.json under an exclusive flock + atomic replace."""
    from src.jsonlock import write_locked  # type: ignore

    def _wrap(data: dict) -> dict:
        if not isinstance(data, dict):
            data = {}
        data.setdefault("projects", [])
        data = mutator(data)
        data["last_updated"] = _now_iso()
        return data

    return write_locked(str(APPROVED_TASKS_FILE), _wrap)


def _find_project(data: dict, slug: str) -> dict | None:
    for p in data.get("projects", []) or []:
        if (p.get("name") or "").lower() == slug.lower():
            return p
    return None


def _read_prd(project_dir: Path) -> dict | None:
    prd_path = project_dir / "scripts" / "ralph" / "prd.json"
    if not prd_path.exists():
        return None
    try:
        return json.loads(prd_path.read_text(encoding="utf-8"))
    except (json.JSONDecodeError, OSError):
        return None


def _pid_alive_with_cmdline(pid: int | None) -> tuple[bool, str]:
    """(alive, cmdline) — cmdline is empty string if not readable."""
    if not pid or not isinstance(pid, int):
        return False, ""
    try:
        os.kill(pid, 0)
    except (ProcessLookupError, PermissionError, OSError):
        return False, ""
    cmdline = ""
    try:
        with open(f"/proc/{pid}/cmdline", "rb") as f:
            cmdline = f.read().decode("utf-8", errors="replace").replace("\x00", " ")
    except (FileNotFoundError, PermissionError, OSError):
        cmdline = ""
    return True, cmdline


# ─── status derivation ────────────────────────────────────────────────


def _derive_status(slug, approved_entry, workspace_dir, prd_data) -> str:
    """Compute one of nine UI states (see module docstring)."""
    # Process signal trumps everything else.
    pid = (approved_entry or {}).get("pid")
    alive, cmdline = _pid_alive_with_cmdline(pid)
    if alive:
        if "ralph.sh" in cmdline:
            return "running-ralph"
        return "running-manual"

    # Approved-tasks entry status (planning/approved/pending takes precedence
    # over PRD-derived states because the user explicitly set it).
    if approved_entry:
        s = (approved_entry.get("status") or "").lower()
        if s == "planning":
            return "planning"
        if s == "approved":
            return "approved"
        if s == "pending":
            return "pending"
        if s in ("complete", "completed"):
            # fall through to prd check — explicit complete wins if prd matches
            pass
        if s == "failed":
            return "failed"
        if s in ("cancelled", "canceled"):
            return "idle"

    # PRD-derived states (only for projects that ran Ralph).
    stories = (prd_data or {}).get("userStories") or []
    if stories:
        all_pass = all(bool(s.get("passes")) for s in stories)
        any_pass = any(bool(s.get("passes")) for s in stories)
        if all_pass:
            return "complete"
        # Distinguish blocked vs failed using per-story flags.
        incomplete = [s for s in stories if not s.get("passes")]
        if incomplete and all(s.get("blocked") for s in incomplete):
            return "blocked"
        if any(s.get("failed") for s in stories):
            return "failed"
        if any_pass:
            # partial progress without active PID — call it idle (re-runnable)
            return "idle"

    return "idle"


def _stories_progress(prd_data: dict | None) -> tuple[int, int]:
    stories = (prd_data or {}).get("userStories") or []
    total = len(stories)
    done = sum(1 for s in stories if s.get("passes"))
    return total, done


def _last_iter_mtime(project_dir: Path) -> float | None:
    logs = project_dir / "scripts" / "ralph" / "logs"
    if not logs.exists():
        return None
    try:
        files = list(logs.glob("iteration-*.log"))
        if not files:
            return None
        return max(f.stat().st_mtime for f in files)
    except OSError:
        return None


def _eta_seconds(prd_data, total, done, last_iter_mtime) -> int | None:
    """Crude ETA: 12 minutes per remaining story (matches RalphHandlers)."""
    if total <= 0:
        return None
    remaining = total - done
    if remaining <= 0:
        return 0
    return remaining * 12 * 60


def _last_message_preview(slug: str) -> str:
    """Return the most recent planning excerpt for any adapter on this slug.

    The dashboard owns adapter="dashboard" but we also surface chats started
    via discord/telegram so the unified UI reflects reality.
    """
    try:
        from src.planning_session import _load_planning_state  # type: ignore
    except Exception:  # pragma: no cover — defensive
        return ""
    try:
        state = _load_planning_state()
    except Exception:
        return ""
    best = ""
    best_ts = ""
    for _key, entry in state.items():
        if (entry.get("slug") or "").lower() != slug.lower():
            continue
        ts = entry.get("updated_at") or entry.get("started_at") or ""
        excerpt = entry.get("last_text_excerpt") or ""
        if ts >= best_ts and excerpt:
            best = excerpt
            best_ts = ts
    return best[:200]


# ─── version helpers ──────────────────────────────────────────────────


def _get_version_from(data: dict) -> int:
    try:
        return int(data.get("version") or 0)
    except (TypeError, ValueError):
        return 0


def _bump_version(data: dict) -> dict:
    data["version"] = _get_version_from(data) + 1
    return data


# ─── signature for SSE change detection ───────────────────────────────


def _git_index_mtime() -> float | None:
    idx = constants.BASE_DIR / ".git" / "index"
    try:
        return idx.stat().st_mtime
    except OSError:
        return None


def _compute_signature() -> str:
    """Hash of (git porcelain status, workspace count, approved-tasks version).

    Uses the cached value when `.git/index` mtime hasn't changed.
    """
    now = time.monotonic()
    git_mtime = _git_index_mtime()
    cached_mtime = _SIG_CACHE.get("git_mtime")
    cached_sig = _SIG_CACHE.get("signature")

    # Always include workspace count + approved version + per-project mtimes
    # in the signature (cheap stat). Only the git porcelain piece is cached.
    ws_count = 0
    project_marks: list[tuple] = []
    if constants.WORKSPACE_DIR.exists():
        for entry in sorted(constants.WORKSPACE_DIR.iterdir()):
            if not entry.is_dir() or entry.name.startswith("."):
                continue
            ws_count += 1
            prd = entry / "scripts" / "ralph" / "prd.json"
            pid_file = entry / "scripts" / "ralph" / ".ralph.pid"
            try:
                pmt = prd.stat().st_mtime if prd.exists() else 0
            except OSError:
                pmt = 0
            try:
                pid_mt = pid_file.stat().st_mtime if pid_file.exists() else 0
            except OSError:
                pid_mt = 0
            project_marks.append((entry.name, pmt, pid_mt))

    # Approved version
    approved = _read_approved()
    version = _get_version_from(approved)

    # Git porcelain — cached on .git/index mtime
    if git_mtime == cached_mtime and cached_sig is not None:
        git_part = cached_sig
    else:
        try:
            res = subprocess.run(
                ["git", "status", "--porcelain"],
                cwd=str(constants.BASE_DIR),
                capture_output=True, text=True, timeout=5,
            )
            git_part = res.stdout if res.returncode == 0 else ""
        except (subprocess.TimeoutExpired, FileNotFoundError, OSError):
            git_part = ""
        _SIG_CACHE["git_mtime"] = git_mtime
        _SIG_CACHE["signature"] = git_part
        _SIG_CACHE["ts"] = now

    h = hashlib.sha256()
    h.update(git_part.encode("utf-8", errors="replace"))
    h.update(str(ws_count).encode())
    h.update(str(version).encode())
    for name, pmt, pid_mt in project_marks:
        h.update(name.encode("utf-8"))
        h.update(f"{pmt:.3f}|{pid_mt:.3f}".encode())
    return h.hexdigest()


# ─── projects mixin ───────────────────────────────────────────────────


class ProjectsHandlers:
    """Mixin: /api/projects/* endpoints — unified workspace + Ralph + planning."""

    # ── helpers (instance) ─────────────────────────────────────────
    def _get_version(self) -> int:
        return _get_version_from(_read_approved())

    def _increment_version(self, data: dict) -> dict:
        return _bump_version(data)

    def _derive_status(self, slug, approved_entry, workspace_entry, prd_data) -> str:
        return _derive_status(slug, approved_entry, workspace_entry, prd_data)

    def _build_unified_payload(self) -> dict:
        approved = _read_approved()
        approved_entries: dict[str, dict] = {
            (p.get("name") or "").lower(): p for p in approved.get("projects", []) or []
        }

        # Walk workspace dirs first so we capture projects even without an
        # approved-tasks entry.
        slugs_seen: set[str] = set()
        result: list[dict] = []
        if constants.WORKSPACE_DIR.exists():
            for entry in sorted(constants.WORKSPACE_DIR.iterdir()):
                if not entry.is_dir() or entry.name.startswith("."):
                    continue
                slug = entry.name
                slugs_seen.add(slug.lower())
                ae = approved_entries.get(slug.lower())
                prd = _read_prd(entry)
                result.append(self._project_record(slug, entry, ae, prd))

        # Then projects that exist only in approved-tasks (no workspace yet).
        for ae in approved.get("projects", []) or []:
            slug = ae.get("name") or ""
            if not slug or slug.lower() in slugs_seen:
                continue
            result.append(self._project_record(slug, None, ae, None))

        return {
            "projects": sorted(result, key=lambda p: p.get("slug") or ""),
            "version": _get_version_from(approved),
            "fetchedAt": _now_iso(),
            "count": len(result),
        }

    def _project_record(self, slug, workspace_dir, approved_entry, prd_data) -> dict:
        status = _derive_status(slug, approved_entry, workspace_dir, prd_data)
        total, done = _stories_progress(prd_data)
        last_iter = _last_iter_mtime(workspace_dir) if workspace_dir else None
        eta = _eta_seconds(prd_data, total, done, last_iter)
        ae = approved_entry or {}
        return {
            "slug": slug,
            "status": status,
            "name": slug,
            "description": ae.get("description") or "",
            "proposed_at": ae.get("proposed_at"),
            "approved_at": ae.get("approved_at"),
            "started_at": ae.get("started_at"),
            "pid": ae.get("pid"),
            "stories_total": total,
            "stories_done": done,
            "eta_seconds": eta,
            "last_message_preview": _last_message_preview(slug),
            "error_reason": ae.get("error") or "",
            "has_workspace": workspace_dir is not None,
            "has_prd": prd_data is not None,
        }

    # ── GET /api/projects ──────────────────────────────────────────
    def handle_unified_status(self):
        try:
            self.send_json(self._build_unified_payload())
        except Exception as exc:
            log.exception("handle_unified_status failed")
            self.send_json({"error": str(exc)}, 500)

    # ── GET /api/projects/signature ────────────────────────────────
    def handle_unified_signature(self):
        try:
            sig = _compute_signature()
            approved = _read_approved()
            self.send_json({
                "signature": sig,
                "version": _get_version_from(approved),
                "fetchedAt": _now_iso(),
            })
        except Exception as exc:
            log.exception("handle_unified_signature failed")
            self.send_json({"error": str(exc)}, 500)

    # ── GET /api/projects/stream (SSE) ────────────────────────────
    def handle_projects_stream(self):
        """Stream `data: <payload>\\n\\n` whenever the signature changes.

        Explicit cookie check (the global POST middleware doesn't cover GET).
        Keep-alive ping every 15s. Exits cleanly on BrokenPipe.
        """
        # Auth: require cookie even though this is a GET.
        if hasattr(self, "_check_dashboard_cookie") and not self._check_dashboard_cookie():
            body = b'{"error":"Unauthorized"}'
            try:
                self.send_response(401)
                self.send_header("Content-Type", "application/json")
                self.send_header("Content-Length", str(len(body)))
                self.end_headers()
                self.wfile.write(body)
            except (BrokenPipeError, ConnectionResetError):
                pass
            return

        # CSRF/Origin allowlist (skipped if no Origin/Referer — curl etc).
        origin = self.headers.get("Origin", "") or ""
        referer = self.headers.get("Referer", "") or ""
        allowed = ["http://127.0.0.1:8088", "http://localhost:8088"]
        dh = os.environ.get("DASHBOARD_HOST", "").strip()
        if dh:
            allowed.append(dh)
        if origin or referer:
            check = origin or referer
            if not any(check.startswith(a) for a in allowed):
                body = b'{"error":"CSRF"}'
                try:
                    self.send_response(403)
                    self.send_header("Content-Type", "application/json")
                    self.send_header("Content-Length", str(len(body)))
                    self.end_headers()
                    self.wfile.write(body)
                except (BrokenPipeError, ConnectionResetError):
                    pass
                return

        try:
            self.send_response(200)
            self.send_header("Content-Type", "text/event-stream")
            self.send_header("Cache-Control", "no-cache")
            self.send_header("X-Accel-Buffering", "no")
            self.send_header("Connection", "keep-alive")
            self.end_headers()
        except (BrokenPipeError, ConnectionResetError):
            return

        last_sig: str | None = None
        last_ping = time.monotonic()

        # Initial snapshot
        try:
            payload = self._build_unified_payload()
            last_sig = _compute_signature()
            self.wfile.write(b"data: " + json.dumps(payload).encode("utf-8") + b"\n\n")
            self.wfile.flush()
        except (BrokenPipeError, ConnectionResetError):
            return
        except Exception as exc:
            try:
                err = json.dumps({"error": str(exc)}).encode("utf-8")
                self.wfile.write(b"data: " + err + b"\n\n")
                self.wfile.flush()
            except Exception:
                pass
            return

        while True:
            try:
                time.sleep(2)
                sig = _compute_signature()
                now = time.monotonic()
                if sig != last_sig:
                    payload = self._build_unified_payload()
                    body = json.dumps(payload).encode("utf-8")
                    self.wfile.write(b"data: " + body + b"\n\n")
                    self.wfile.flush()
                    last_sig = sig
                    last_ping = now
                elif now - last_ping >= 15:
                    self.wfile.write(b'data: {"type":"ping"}\n\n')
                    self.wfile.flush()
                    last_ping = now
            except (BrokenPipeError, ConnectionResetError):
                return
            except Exception:
                # Best-effort: one bad iter shouldn't kill the stream.
                continue

    # ── POST /api/projects/propose ─────────────────────────────────
    def handle_propose(self):
        body = parse_json_body(self)
        if body is None:
            return  # parse_json_body already sent 400
        slug = (body.get("slug") or "").strip()
        description = (body.get("description") or "").strip()

        slug_err = validate_slug(slug)
        desc_err = validate_description(description)
        if slug_err or desc_err:
            errors: dict[str, str] = {}
            if slug_err:
                errors["slug"] = slug_err
            if desc_err:
                errors["description"] = desc_err
            self.send_json({"error": "validation_failed", "fields": errors}, 400)
            return

        existing = _find_project(_read_approved(), slug)
        if existing:
            self.send_json(
                {"error": "duplicate_slug", "slug": slug, "status": existing.get("status")},
                409,
            )
            return

        def _add(data: dict) -> dict:
            # Re-check inside the lock — guard against races.
            if _find_project(data, slug) is not None:
                raise FileExistsError(slug)
            data["projects"].append({
                "name": slug,
                "description": description,
                "status": "pending",
                "planning_session_id": None,
                "final_plan_path": None,
                "proposed_at": _now_iso(),
                "approved_at": None,
                "started_at": None,
                "pid": None,
            })
            _bump_version(data)
            return data

        try:
            _write_approved(_add)
        except FileExistsError:
            self.send_json({"error": "duplicate_slug", "slug": slug}, 409)
            return
        except Exception as exc:
            log.exception("propose failed")
            self.send_json({"error": str(exc)}, 500)
            return
        self.send_json({"slug": slug, "status": "pending"}, 201)

    # ── helpers for approve/unapprove/cancel ──────────────────────
    def _read_if_match(self) -> int | None:
        raw = self.headers.get("If-Match", "") or self.headers.get("if-match", "")
        if not raw:
            return None
        raw = raw.strip().strip('"')
        try:
            return int(raw)
        except (TypeError, ValueError):
            return None

    def _set_status_locked(self, slug: str, target_status: str, **extra) -> tuple[bool, dict]:
        """Mutate approved-tasks: set status + extra fields. Bumps version.

        Returns (ok, project_entry_or_error_dict).
        """
        client_ver = self._read_if_match()

        captured: dict = {}

        def _mut(data: dict) -> dict:
            current_ver = _get_version_from(data)
            if client_ver is not None and current_ver != client_ver:
                captured["error"] = "stale"
                captured["current_version"] = current_ver
                raise _StaleVersion()
            proj = _find_project(data, slug)
            if proj is None:
                captured["error"] = "not_found"
                raise KeyError(slug)
            proj["status"] = target_status
            for k, v in extra.items():
                if v is None and k in proj:
                    proj[k] = None
                else:
                    proj[k] = v
            captured["project"] = proj
            _bump_version(data)
            return data

        try:
            _write_approved(_mut)
        except _StaleVersion:
            return False, {
                "error": "stale",
                "current_version": captured.get("current_version", 0),
            }
        except KeyError:
            return False, {"error": "not_found", "slug": slug}
        except Exception as exc:
            log.exception("status mutate failed")
            return False, {"error": str(exc)}
        return True, captured.get("project", {})

    # ── POST /api/projects/approve ─────────────────────────────────
    def handle_approve(self):
        body = parse_json_body(self)
        if body is None:
            return
        slug = (body.get("slug") or "").strip()
        if validate_slug(slug):
            self.send_json({"error": "invalid_slug"}, 400)
            return
        ok, payload = self._set_status_locked(slug, "approved", approved_at=_now_iso())
        if not ok:
            code = 409 if payload.get("error") == "stale" else 404 if payload.get("error") == "not_found" else 500
            self.send_json(payload, code)
            return
        self.send_json({"ok": True, "slug": slug, "status": "approved"})

    # ── POST /api/projects/unapprove ──────────────────────────────
    def handle_unapprove(self):
        body = parse_json_body(self)
        if body is None:
            return
        slug = (body.get("slug") or "").strip()
        if validate_slug(slug):
            self.send_json({"error": "invalid_slug"}, 400)
            return
        ok, payload = self._set_status_locked(slug, "pending", approved_at=None)
        if not ok:
            code = 409 if payload.get("error") == "stale" else 404 if payload.get("error") == "not_found" else 500
            self.send_json(payload, code)
            return
        self.send_json({"ok": True, "slug": slug, "status": "pending"})

    # ── POST /api/projects/cancel ─────────────────────────────────
    def handle_cancel(self):
        """Cancel a project. Sets status=cancelled (matches router behaviour)."""
        body = parse_json_body(self)
        if body is None:
            return
        slug = (body.get("slug") or "").strip()
        if validate_slug(slug):
            self.send_json({"error": "invalid_slug"}, 400)
            return
        ok, payload = self._set_status_locked(slug, "cancelled")
        if not ok:
            code = 409 if payload.get("error") == "stale" else 404 if payload.get("error") == "not_found" else 500
            self.send_json(payload, code)
            return
        self.send_json({"ok": True, "slug": slug, "status": "cancelled"})

    # ── planning state helpers ────────────────────────────────────
    @staticmethod
    def _planning_key(slug: str) -> tuple[str, str]:
        """Dashboard planning sessions live in adapter='dashboard', channel=slug."""
        return ("dashboard", slug)

    # ── POST /api/projects/<slug>/plan/start ──────────────────────
    def handle_plan_start(self, slug: str):
        if validate_slug(slug):
            self.send_json({"error": "invalid_slug"}, 400)
            return
        body = parse_json_body(self)
        if body is None:
            return
        description = (body.get("description") or "").strip()

        # Description fallback: use the existing approved-tasks description so
        # users can re-open planning on a project they already proposed.
        if not description:
            existing = _find_project(_read_approved(), slug)
            if existing:
                description = (existing.get("description") or "").strip()
        desc_err = validate_description(description) if description else "description required"
        if desc_err:
            self.send_json({"error": "invalid_description", "message": desc_err}, 400)
            return

        # Set status=planning + ensure entry exists.
        def _mut(data: dict) -> dict:
            proj = _find_project(data, slug)
            if proj is None:
                proj = {
                    "name": slug,
                    "description": description,
                    "status": "planning",
                    "planning_session_id": None,
                    "final_plan_path": None,
                    "proposed_at": _now_iso(),
                    "approved_at": None,
                    "started_at": None,
                    "pid": None,
                }
                data["projects"].append(proj)
            else:
                proj["status"] = "planning"
                if not proj.get("description"):
                    proj["description"] = description
            _bump_version(data)
            return data

        try:
            _write_approved(_mut)
        except Exception as exc:
            log.exception("plan/start mutate failed")
            self.send_json({"error": str(exc)}, 500)
            return

        adapter, channel = self._planning_key(slug)
        try:
            from src.planning_orchestrator import PlanningOrchestrator  # type: ignore
            session, first_text = PlanningOrchestrator.start(
                slug=slug,
                description=description,
                channel_id=channel,
                adapter=adapter,
            )
        except Exception as exc:
            log.exception("PlanningOrchestrator.start failed for %s", slug)
            # Roll status back so the dashboard reflects reality.
            try:
                self._set_status_locked(slug, "pending")
            except Exception:
                pass
            self.send_json({"error": "planning_start_failed", "message": str(exc)}, 500)
            return

        # Stash planning_session_id on the entry.
        def _stash(data: dict) -> dict:
            proj = _find_project(data, slug)
            if proj is not None:
                proj["planning_session_id"] = session.planning_session_id
            return data

        try:
            _write_approved(_stash)
        except Exception:
            pass

        self.send_json({
            "ok": True,
            "slug": slug,
            "session_id": session.planning_session_id,
            "phase": session.phase,
            "message": first_text,
        })

    # ── POST /api/projects/<slug>/plan/respond ────────────────────
    def handle_plan_respond(self, slug: str):
        if validate_slug(slug):
            self.send_json({"error": "invalid_slug"}, 400)
            return
        body = parse_json_body(self)
        if body is None:
            return
        message = (body.get("message") or "").strip()
        if not message:
            self.send_json({"error": "message required"}, 400)
            return

        adapter, channel = self._planning_key(slug)
        try:
            from src.planning_orchestrator import PlanningOrchestrator  # type: ignore
            session, text, phase_ready = PlanningOrchestrator.respond(
                adapter=adapter, channel_id=channel, message=message,
            )
        except Exception as exc:
            log.exception("plan/respond failed for %s", slug)
            self.send_json({"error": str(exc)}, 500)
            return

        if session is None:
            self.send_json(
                {"error": "no_active_session", "message": "Nu există o sesiune activă pentru acest slug."},
                404,
            )
            return
        self.send_json({
            "ok": True,
            "slug": slug,
            "phase": session.phase,
            "phase_ready": phase_ready,
            "message": text,
        })

    # ── GET /api/projects/<slug>/plan/state ───────────────────────
    def handle_plan_state(self, slug: str):
        if validate_slug(slug):
            self.send_json({"error": "invalid_slug"}, 400)
            return
        adapter, channel = self._planning_key(slug)
        try:
            from src.planning_session import get_planning_state  # type: ignore
        except Exception as exc:
            self.send_json({"error": str(exc)}, 500)
            return
        state = get_planning_state(adapter, channel)
        # Also try cross-adapter fallback so the dashboard surfaces sessions
        # started via discord/telegram.
        if state is None:
            try:
                from src.planning_session import _load_planning_state  # type: ignore
                all_state = _load_planning_state()
                for _k, entry in all_state.items():
                    if (entry.get("slug") or "").lower() == slug.lower():
                        state = entry
                        break
            except Exception:
                pass
        if state is None:
            self.send_json({"slug": slug, "status": "expired", "phase": None, "pending_response": False})
            return
        # Heuristic: phase=='__complete__' means the pipeline finished.
        phase = state.get("phase")
        completed = phase == "__complete__"
        self.send_json({
            "slug": slug,
            "status": "complete" if completed else "active",
            "phase": phase,
            "phases_completed": state.get("phases_completed") or [],
            "phases_planned": state.get("phases_planned") or [],
            "pending_response": False,
            "since": state.get("started_at"),
            "updated_at": state.get("updated_at"),
            "session_id": state.get("session_id"),
            "planning_session_id": state.get("planning_session_id"),
            "last_text_excerpt": state.get("last_text_excerpt") or "",
            "final_plan_path": state.get("final_plan_path"),
        })

    # ── GET /api/projects/<slug>/plan/transcript ──────────────────
    def handle_plan_transcript(self, slug: str):
        """Return planning transcript.

        The planning subprocess persists only the latest excerpt + metadata
        in `sessions/planning.json` (full transcripts live inside Claude CLI
        session state). We return what's available, plus the final-plan
        markdown if it has been written.
        """
        if validate_slug(slug):
            self.send_json({"error": "invalid_slug"}, 400)
            return
        adapter, channel = self._planning_key(slug)
        try:
            from src.planning_session import get_planning_state, _load_planning_state  # type: ignore
        except Exception as exc:
            self.send_json({"error": str(exc)}, 500)
            return
        state = get_planning_state(adapter, channel)
        if state is None:
            try:
                all_state = _load_planning_state()
                for _k, entry in all_state.items():
                    if (entry.get("slug") or "").lower() == slug.lower():
                        state = entry
                        break
            except Exception:
                pass
        final_plan_text = ""
        final_plan_path = None
        try:
            fp = constants.WORKSPACE_DIR / slug / "scripts" / "ralph" / "final-plan.md"
            if fp.exists():
                final_plan_path = str(fp)
                final_plan_text = fp.read_text(encoding="utf-8", errors="replace")
        except OSError:
            pass
        self.send_json({
            "slug": slug,
            "phase": (state or {}).get("phase"),
            "phases_completed": (state or {}).get("phases_completed") or [],
            "last_text_excerpt": (state or {}).get("last_text_excerpt") or "",
            "final_plan_path": final_plan_path,
            "final_plan": final_plan_text,
            "history": [],  # reserved for future per-turn JSONL sidecar
        })

    # ── POST /api/projects/<slug>/plan/finalize ───────────────────
    def handle_plan_finalize(self, slug: str):
        if validate_slug(slug):
            self.send_json({"error": "invalid_slug"}, 400)
            return
        adapter, channel = self._planning_key(slug)
        try:
            from src.planning_session import get_planning_state, clear_planning_state  # type: ignore
            from src.planning_orchestrator import PlanningOrchestrator  # type: ignore
        except Exception as exc:
            self.send_json({"error": str(exc)}, 500)
            return

        state = get_planning_state(adapter, channel)
        final_plan = None
        if state and state.get("final_plan_path"):
            final_plan = state["final_plan_path"]
        else:
            final_plan = str(PlanningOrchestrator.final_plan_path(slug))

        def _mut(data: dict) -> dict:
            proj = _find_project(data, slug)
            if proj is None:
                raise KeyError(slug)
            proj["status"] = "approved"
            proj["approved_at"] = _now_iso()
            proj["planning_session_id"] = None
            proj["final_plan_path"] = final_plan
            _bump_version(data)
            return data

        try:
            _write_approved(_mut)
        except KeyError:
            self.send_json({"error": "not_found", "slug": slug}, 404)
            return
        except Exception as exc:
            log.exception("plan/finalize mutate failed")
            self.send_json({"error": str(exc)}, 500)
            return

        clear_planning_state(adapter, channel)
        self.send_json({
            "ok": True,
            "slug": slug,
            "status": "approved",
            "final_plan_path": final_plan,
        })

    # ── POST /api/projects/<slug>/plan/cancel ─────────────────────
    def handle_plan_cancel_planning(self, slug: str):
        if validate_slug(slug):
            self.send_json({"error": "invalid_slug"}, 400)
            return
        adapter, channel = self._planning_key(slug)
        try:
            from src.planning_orchestrator import PlanningOrchestrator  # type: ignore
        except Exception as exc:
            self.send_json({"error": str(exc)}, 500)
            return

        cleared = PlanningOrchestrator.cancel(adapter, channel)
        # Revert status to pending if currently planning.
        def _mut(data: dict) -> dict:
            proj = _find_project(data, slug)
            if proj is not None and (proj.get("status") or "").lower() == "planning":
                proj["status"] = "pending"
                proj["planning_session_id"] = None
                _bump_version(data)
            return data

        try:
            _write_approved(_mut)
        except Exception:
            pass
        self.send_json({"ok": True, "slug": slug, "cleared": cleared, "status": "pending"})

    # ── POST /api/projects/<slug>/plan/advance ────────────────────
    def handle_plan_advance(self, slug: str):
        if validate_slug(slug):
            self.send_json({"error": "invalid_slug"}, 400)
            return
        adapter, channel = self._planning_key(slug)
        try:
            from src.planning_orchestrator import PlanningOrchestrator  # type: ignore
            session, text, completed = PlanningOrchestrator.advance(adapter, channel)
        except Exception as exc:
            log.exception("plan/advance failed for %s", slug)
            self.send_json({"error": str(exc)}, 500)
            return
        if session is None:
            self.send_json({"error": "no_active_session", "message": text}, 404)
            return
        self.send_json({
            "ok": True,
            "slug": slug,
            "phase": session.phase,
            "completed": completed,
            "message": text,
        })