from __future__ import annotations

import os
from dataclasses import dataclass


@dataclass
class SlackCredentials:
    account_id: str = "default"
    bot_token: str = ""
    app_token: str = ""
    user_token: str = ""
    signing_secret: str = ""
    bot_token_source: str = "none"
    app_token_source: str = "none"
    user_token_source: str = "none"
    signing_secret_source: str = "none"

    @classmethod
    def from_config(cls, account_id: str, config: dict[str, str]) -> SlackCredentials:
        creds = cls(account_id=account_id)

        creds.bot_token = config.get("bot_token", "")
        creds.app_token = config.get("app_token", "")
        creds.user_token = config.get("user_token", "")
        creds.signing_secret = config.get("signing_secret", "")

        if creds.bot_token:
            creds.bot_token_source = "config"
        else:
            creds.bot_token = os.getenv("SLACK_BOT_TOKEN", "")
            creds.bot_token_source = "env" if creds.bot_token else "none"

        if creds.app_token:
            creds.app_token_source = "config"
        else:
            creds.app_token = os.getenv("SLACK_APP_TOKEN", "")
            creds.app_token_source = "env" if creds.app_token else "none"

        if creds.user_token:
            creds.user_token_source = "config"
        else:
            creds.user_token = os.getenv("SLACK_USER_TOKEN", "")
            creds.user_token_source = "env" if creds.user_token else "none"

        if creds.signing_secret:
            creds.signing_secret_source = "config"
        else:
            creds.signing_secret = os.getenv("SLACK_SIGNING_SECRET", "")
            creds.signing_secret_source = "env" if creds.signing_secret else "none"

        return creds

    @classmethod
    def from_env(cls, account_id: str = "default") -> SlackCredentials:
        creds = cls(account_id=account_id)
        creds.bot_token = os.getenv("SLACK_BOT_TOKEN", "")
        creds.app_token = os.getenv("SLACK_APP_TOKEN", "")
        creds.user_token = os.getenv("SLACK_USER_TOKEN", "")
        creds.signing_secret = os.getenv("SLACK_SIGNING_SECRET", "")

        creds.bot_token_source = "env" if creds.bot_token else "none"
        creds.app_token_source = "env" if creds.app_token else "none"
        creds.user_token_source = "env" if creds.user_token else "none"
        creds.signing_secret_source = "env" if creds.signing_secret else "none"

        return creds

    def validate(self) -> list[str]:
        errors: list[str] = []
        if self.bot_token and not self.bot_token.startswith("xoxb-"):
            errors.append(f"bot_token must start with 'xoxb-', got: {self.bot_token[:5]}...")
        if self.app_token and not self.app_token.startswith("xapp-"):
            errors.append(f"app_token must start with 'xapp-', got: {self.app_token[:5]}...")
        if self.user_token and not self.user_token.startswith("xoxp-"):
            errors.append(f"user_token must start with 'xoxp-', got: {self.user_token[:5]}...")
        return errors

    def to_dict(self) -> dict[str, str]:
        return {
            "account_id": self.account_id,
            "bot_token_source": self.bot_token_source,
            "app_token_source": self.app_token_source,
            "user_token_source": self.user_token_source,
            "signing_secret_source": self.signing_secret_source,
        }