# Load project config (projects/<id>/conf.json) for tickets spooler and authorized_emails.
# Requires PROJECT_ROOT (repo root with ai_project_id) and GITEA_ISSUES_DIR (ia_dev/gitea-issues).

from __future__ import annotations

import json
import os
from pathlib import Path


def project_root() -> Path:
    """Project repo root (parent of ia_dev). Where data/issues/ and ai_project_id live."""
    env_root = os.environ.get("PROJECT_ROOT")
    if env_root:
        return Path(env_root).resolve()
    env_repo = os.environ.get("REPO_ROOT")
    if env_repo:
        root = Path(env_repo).resolve()
        # If REPO_ROOT is ia_dev, project root is parent
        if (root / "gitea-issues").is_dir():
            return root.parent
        return root
    issues_dir = os.environ.get("GITEA_ISSUES_DIR")
    if issues_dir:
        return Path(issues_dir).resolve().parent.parent
    return Path(__file__).resolve().parent.parent.parent


def ia_dev_root() -> Path:
    """Directory containing gitea-issues (ia_dev)."""
    issues_dir = os.environ.get("GITEA_ISSUES_DIR")
    if issues_dir:
        return Path(issues_dir).resolve().parent
    return Path(__file__).resolve().parent.parent


def load_project_config() -> dict | None:
    """Load projects/<slug>/conf.json. Returns None if not found or slug missing."""
    root = project_root()
    ia_dev = ia_dev_root()
    slug_path = root / "ai_project_id"
    if not slug_path.is_file():
        slug_path = root / ".ia_project"
    slug = os.environ.get("IA_PROJECT", "").strip() if os.environ.get("IA_PROJECT") else None
    if not slug and slug_path.is_file():
        slug = slug_path.read_text(encoding="utf-8").strip()
    if not slug:
        return None
    conf_path = ia_dev / "projects" / slug / "conf.json"
    if not conf_path.is_file():
        return None
    with open(conf_path, encoding="utf-8") as f:
        return json.load(f)


def project_dir() -> Path | None:
    """Path to projects/<id>/ (under ia_dev). None if project config not found."""
    root = project_root()
    ia_dev = ia_dev_root()
    slug = os.environ.get("IA_PROJECT", "").strip()
    if not slug and (root / "ai_project_id").is_file():
        slug = (root / "ai_project_id").read_text(encoding="utf-8").strip()
    if not slug and (root / ".ia_project").is_file():
        slug = (root / ".ia_project").read_text(encoding="utf-8").strip()
    if not slug:
        return None
    return ia_dev / "projects" / slug


def data_issues_dir() -> Path:
    """Path to data/issues/ spooler under projects/<id>/ (ia_dev/projects/<id>/data/issues)."""
    pd = project_dir()
    if pd is not None:
        return pd / "data" / "issues"
    return project_root() / "data" / "issues"


def project_logs_dir() -> Path:
    """Path to logs/ under projects/<id>/ (ia_dev/projects/<id>/logs)."""
    pd = project_dir()
    if pd is not None:
        return pd / "logs"
    return project_root() / "logs"


def authorized_emails() -> dict[str, str | list[str]]:
    """Return tickets.authorized_emails (to, from list). Empty dict if missing."""
    conf = load_project_config()
    if not conf:
        return {}
    tickets = conf.get("tickets") or {}
    return tickets.get("authorized_emails") or {}