import os
from dataclasses import dataclass, field
from pathlib import Path

from dotenv import load_dotenv

load_dotenv()


TRUE_VALUES = {"1", "true", "yes", "on"}


#  Хелперы для чтения env-переменных с приведением типов 

def _env_str(name: str, default: str) -> str:
    value = os.getenv(name)
    return value if value is not None else default


def _env_optional_str(name: str) -> str | None:
    value = os.getenv(name)
    if value is None:
        return None
    value = value.strip()
    return value or None


def _env_path_str(name: str) -> str | None:
    value = _env_optional_str(name)
    if value is None:
        return None
    return str(Path(value).expanduser())


def _env_bool(name: str, default: bool) -> bool:
    fallback = "true" if default else "false"
    return _env_str(name, fallback).strip().lower() in TRUE_VALUES


def _env_int(name: str, default: int) -> int:
    return int(_env_str(name, str(default)).strip())


def _env_float(name: str, default: float) -> float:
    return float(_env_str(name, str(default)).strip())


#  Конфиг браузерного отпечатка (User-Agent, viewport, timezone) 

@dataclass(slots=True)
class FingerprintConfig:
    user_agent: str = (
        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
        "AppleWebKit/537.36 (KHTML, like Gecko) "
        "Chrome/135.0.0.0 Safari/537.36"
    )
    viewport_presets: tuple[dict[str, int], ...] = (
        {"width": 1920, "height": 1080},
        {"width": 1600, "height": 900},
        {"width": 1536, "height": 864},
        {"width": 1440, "height": 900},
        {"width": 1366, "height": 768},
    )
    timezone_candidates: tuple[str, ...] = (
        "America/New_York",
        "America/Chicago",
        "America/Los_Angeles",
    )
    locale: str = "en-US"
    sec_ch_ua: str = '"Google Chrome";v="135", "Chromium";v="135", "Not.A/Brand";v="24"'


# --- Конфиг OpenLane (auth, paging, throttle, retry, checkpoint/output) ---

@dataclass(slots=True)
class OpenLaneConfig:
    sign_in_url: str = _env_str("OPENLANE_SIGN_IN_URL", "https://app.openlane.com/sign_in")
    search_url: str = _env_str("OPENLANE_SEARCH_URL", "https://app.openlane.com/search?tab=marketplace")
    api_search_url: str = _env_str("OPENLANE_API_SEARCH_URL", "https://app.openlane.com/api/v4/search")
    username: str = _env_str("OPENLANE_USERNAME", "")
    password: str = _env_str("OPENLANE_PASSWORD", "")
    source_tab: str = _env_str("OPENLANE_SOURCE_TAB", "marketplace")
    sale_types: str = _env_str("OPENLANE_SALE_TYPES", "marketplace")
    page_size: int = _env_int("OPENLANE_PAGE_SIZE", 30)
    max_pages: int = _env_int("OPENLANE_MAX_PAGES", 512)
    concurrency: int = _env_int("OPENLANE_CONCURRENCY", 4)
    throttle_min_seconds: float = _env_float("OPENLANE_THROTTLE_MIN_SECONDS", 0.3)
    throttle_max_seconds: float = _env_float("OPENLANE_THROTTLE_MAX_SECONDS", 0.8)
    retry_schedule_seconds: tuple[float, ...] = tuple(
        float(part.strip())
        for part in _env_str("OPENLANE_RETRY_SCHEDULE_SECONDS", "2,5,10").split(",")
        if part.strip()
    ) or (2.0, 5.0, 10.0)
    checkpoint_every_pages: int = _env_int("OPENLANE_CHECKPOINT_EVERY_PAGES", 10)
    output_dir: str = _env_str("OPENLANE_OUTPUT_DIR", "artifacts/openlane")
    jsonl_output: str = _env_str("OPENLANE_JSONL_OUTPUT", "artifacts/openlane/openlane_search.jsonl")
    aggregated_output: str = _env_str("OPENLANE_AGGREGATED_OUTPUT", "artifacts/openlane/openlane_search_aggregated.json")
    checkpoint_file: str = _env_str("OPENLANE_CHECKPOINT_FILE", "artifacts/openlane/openlane_checkpoint.json")
    storage_state_file: str = _env_str("OPENLANE_STORAGE_STATE_FILE", "artifacts/openlane/openlane_storage_state.json")
    persist_storage_state: bool = _env_bool("OPENLANE_PERSIST_STORAGE_STATE", True)
    progress_log_every_pages: int = _env_int("OPENLANE_PROGRESS_LOG_EVERY_PAGES", 10)
    request_timeout_ms: int = _env_int("OPENLANE_REQUEST_TIMEOUT_MS", 45000)
    max_cars_limit: int = _env_int("OPENLANE_MAX_CARS_LIMIT", 20)
    refresh_token: str = _env_str("OPENLANE_REFRESH_TOKEN", "")
    okta_client_id: str = _env_str("OPENLANE_OKTA_CLIENT_ID", "")
    okta_token_endpoint: str = _env_str(
        "OPENLANE_OKTA_TOKEN_ENDPOINT",
        "https://okta.iam.karglobal.com/oauth2/default/v1/token",
    )
    okta_redirect_uri: str = _env_str("OPENLANE_OKTA_REDIRECT_URI", "https://app.openlane.com/sign_in")
    okta_timeout_seconds: int = _env_int("OPENLANE_OKTA_TIMEOUT_SECONDS", 15)


# --- Конфиг PostgreSQL (URL, пул соединений, pool_recycle) ---

@dataclass(slots=True)
class DatabaseConfig:
    url: str = _env_str("OPENLANE_DATABASE_URL", "postgresql+psycopg2://openlane:openlane@localhost:5432/openlane_scraper")
    echo: bool = _env_bool("OPENLANE_DATABASE_ECHO", False)
    pool_size: int = _env_int("OPENLANE_DATABASE_POOL_SIZE", 5)
    max_overflow: int = _env_int("OPENLANE_DATABASE_MAX_OVERFLOW", 10)
    pool_recycle_seconds: int = _env_int("OPENLANE_DATABASE_POOL_RECYCLE_SECONDS", 1800)
    auto_create_tables: bool = _env_bool("OPENLANE_DATABASE_AUTO_CREATE_TABLES", False)


# --- Конфиг Redis (URL для Celery broker) ---

@dataclass(slots=True)
class RedisConfig:
    url: str = _env_str("OPENLANE_REDIS_URL", "redis://localhost:6379/0")
    socket_timeout_seconds: float = _env_float("OPENLANE_REDIS_SOCKET_TIMEOUT_SECONDS", 10.0)
    socket_connect_timeout_seconds: float = _env_float("OPENLANE_REDIS_SOCKET_CONNECT_TIMEOUT_SECONDS", 5.0)
    health_check_interval_seconds: int = _env_int("OPENLANE_REDIS_HEALTH_CHECK_INTERVAL_SECONDS", 30)


# --- Конфиг Celery (лимиты задач, concurrency, beat-расписание) ---

@dataclass(slots=True)
class CeleryConfig:
    broker_url: str = _env_str("CELERY_BROKER_URL", "")
    result_backend: str = _env_str("CELERY_RESULT_BACKEND", "")
    task_soft_time_limit: int = _env_int("CELERY_TASK_SOFT_TIME_LIMIT", 3300)
    task_time_limit: int = _env_int("CELERY_TASK_TIME_LIMIT", 3600)
    worker_concurrency: int = _env_int("CELERY_WORKER_CONCURRENCY", 4)
    worker_max_tasks_per_child: int = _env_int("CELERY_WORKER_MAX_TASKS_PER_CHILD", 5)
    broker_visibility_timeout: int = _env_int("CELERY_BROKER_VISIBILITY_TIMEOUT", 7200)
    beat_sync_interval_minutes: int = _env_int("CELERY_BEAT_SYNC_INTERVAL_MINUTES", 60)
    beat_sync_limit: int | None = _env_int("CELERY_BEAT_SYNC_LIMIT", 0) or None


# --- Конфиг прокси (server, username, password) ---

@dataclass(slots=True)
class ProxyConfig:
    server: str | None = _env_optional_str("OPENLANE_PROXY_SERVER")
    username: str | None = _env_optional_str("OPENLANE_PROXY_USERNAME")
    password: str | None = _env_optional_str("OPENLANE_PROXY_PASSWORD")

    @property
    def enabled(self) -> bool:
        return bool(self.server)

    def to_playwright_dict(self) -> dict[str, str] | None:
        if not self.server:
            return None
        result: dict[str, str] = {"server": self.server}
        if self.username:
            result["username"] = self.username
        if self.password:
            result["password"] = self.password
        return result


#  Главный объект настроек: собирает все блоки конфигурации 

@dataclass(slots=True)
class Settings:
    default_timeout_ms: int = _env_int("OPENLANE_TIMEOUT_MS", 45000)
    headless: bool = _env_bool("OPENLANE_HEADLESS", True)
    browser_engine: str = _env_str("OPENLANE_BROWSER_ENGINE", "auto")
    log_level: str = _env_str("OPENLANE_LOG_LEVEL", "INFO")
    log_file: str | None = _env_optional_str("OPENLANE_LOG_FILE")
    enable_trace_id_logs: bool = _env_bool("OPENLANE_ENABLE_TRACE_ID_LOGS", True)
    runtime_config_file: str | None = _env_path_str("OPENLANE_RUNTIME_CONFIG_FILE") or "runtime_config.json"
    fingerprint: FingerprintConfig = field(default_factory=FingerprintConfig)
    openlane: OpenLaneConfig = field(default_factory=OpenLaneConfig)
    database: DatabaseConfig = field(default_factory=DatabaseConfig)
    redis: RedisConfig = field(default_factory=RedisConfig)
    celery: CeleryConfig = field(default_factory=CeleryConfig)
    proxy: ProxyConfig = field(default_factory=ProxyConfig)


# Глобальный синглтон — используется по умолчанию во всех модулях.
settings = Settings()