"""Runtime configuration from environment and arguments."""

import os
import re

from tai_pkg.consts import Consts

__all__ = ["Config"]


class Config:
    def __init__(self, args):
        self.home = os.environ.get("TAI_HOME") or os.path.join(os.path.expanduser("~"), ".tai")
        self.profiles_dir = os.path.join(self.home, "profiles")
        self.audio_dir = os.path.join(self.home, "audio")
        self.db_path = os.path.join(self.home, "memory.db")
        self.history_path = os.path.join(self.home, "history")
        self.model = os.environ.get("TAI_MODEL") or Consts.DEFAULT_MODEL
        self.explicit_model = os.environ.get("TAI_MODEL") or ""
        self.backends = Config.parse_backends(os.environ.get("TAI_BACKENDS"))
        self.openrouter_key = os.environ.get("OPENROUTER_API_KEY") or ""
        self.openrouter_models = Config.split_models(os.environ.get("TAI_OPENROUTER_MODELS"))
        self.retry_seconds = float(os.environ.get("TAI_RETRY_SECONDS") or 0) if re.match(r"^\d+(\.\d+)?$", (os.environ.get("TAI_RETRY_SECONDS") or "0").strip()) else 0.0
        self.opencode_enabled = (os.environ.get("TAI_OPENCODE") or "1").strip().lower() not in ("0", "false", "no", "off")
        self.opencode_models = Config.split_models(os.environ.get("TAI_OPENCODE_MODELS"))
        self.devplace_key = os.environ.get("DEVPLACE_API_KEY") or ""
        self.devplace_base = (os.environ.get("TAI_DEVPLACE_BASE") or Consts.DEVPLACE_BASE).rstrip("/")
        self.devplace_models = Config.split_models(os.environ.get("TAI_DEVPLACE_MODELS"))
        self.openrouter_enabled = (os.environ.get("TAI_OPENROUTER") or "1").strip().lower() not in ("0", "false", "no", "off")
        self.pollinations_enabled = (os.environ.get("TAI_POLLINATIONS") or "1").strip().lower() not in ("0", "false", "no", "off")
        self.pollinations_models = Config.split_models(os.environ.get("TAI_POLLINATIONS_MODELS")) or list(Consts.POLLINATIONS_MODELS)
        self.zen_enabled = (os.environ.get("TAI_ZEN") or "").strip().lower() in ("1", "true", "yes", "on")
        self.zen_models = Config.split_models(os.environ.get("TAI_ZEN_MODELS")) or list(Consts.ZEN_FREE_MODELS)
        self.voice = os.environ.get("TAI_VOICE") or Consts.DEFAULT_VOICE
        self.auto_approve = bool(args.yes)
        self.profile = args.profile or "default"
        os.makedirs(self.profiles_dir, exist_ok=True)
        os.makedirs(self.audio_dir, exist_ok=True)

    @staticmethod
    def split_models(spec):
        return [item.strip() for item in (spec or "").replace("\n", ",").split(",") if item.strip()]

    @staticmethod
    def parse_backends(spec):
        found = []
        for entry in (spec or "").replace("\n", ";").split(";"):
            fields = [field.strip() for field in entry.split("|")]
            if len(fields) < 3:
                continue
            label, base, key = fields[0], fields[1].rstrip("/"), fields[2]
            if key.startswith("$"):
                key = os.environ.get(key[1:], "")
            model = fields[3].strip() if len(fields) > 3 else ""
            profile = fields[4].strip().lower() if len(fields) > 4 else ""
            if profile not in ("", "opencode"):
                profile = ""
            if not label or not base:
                continue
            found.append({"label": label, "base": base, "key": key, "model": model or "", "profile": profile})
        return found