external_demand/app/hot_content/config.py

"""热点内容流程配置加载。"""

from __future__ import annotations

import json
import os
from pathlib import Path
from typing import Any

from app.core.config import PROJECT_ROOT, settings
from app.hot_content.category_filter import DEFAULT_ELDERLY_CATEGORY_LIST
from app.hot_content.exceptions import HotContentFlowError
from app.hot_content.types import FlowConfig, HotSourceConfig, MysqlConfig


def _get_env(name: str, default: str = "") -> str:
    value = os.getenv(name)
    if value is None or value == "":
        return default
    return value


def _get_env_int(name: str, default: int) -> int:
    raw = os.getenv(name)
    if raw is None or raw == "":
        return default
    try:
        return int(raw)
    except ValueError as exc:
        raise HotContentFlowError(f"invalid integer env {name}={raw!r}") from exc


def _get_env_float(name: str, default: float) -> float:
    raw = os.getenv(name)
    if raw is None or raw == "":
        return default
    try:
        return float(raw)
    except ValueError as exc:
        raise HotContentFlowError(f"invalid float env {name}={raw!r}") from exc


def _get_env_bool(name: str, default: bool) -> bool:
    raw = os.getenv(name)
    if raw is None or raw == "":
        return default
    return raw.strip().lower() in {"1", "true", "yes", "y", "on"}


def _load_json_from_env_or_file(env_name: str, file_env_name: str) -> Any | None:
    file_path = os.getenv(file_env_name)
    if file_path:
        path = Path(file_path).expanduser()
        if not path.is_absolute():
            path = PROJECT_ROOT / path
        try:
            return json.loads(path.read_text(encoding="utf-8"))
        except json.JSONDecodeError as exc:
            raise HotContentFlowError(f"invalid json file {path}") from exc

    raw = os.getenv(env_name)
    if not raw:
        return None
    try:
        return json.loads(raw)
    except json.JSONDecodeError as exc:
        raise HotContentFlowError(f"invalid json env {env_name}") from exc


def _normalize_source_config(item: Any) -> HotSourceConfig:
    if isinstance(item, str):
        source = item.strip()
        if not source:
            raise HotContentFlowError("hot source cannot be empty")
        return HotSourceConfig(source=source)
    if not isinstance(item, dict):
        raise HotContentFlowError(f"invalid hot source config: {item!r}")

    source = str(item.get("source") or item.get("source_name") or "").strip()
    if not source:
        raise HotContentFlowError(f"hot source missing source: {item!r}")

    hot_rank_base_url = str(item.get("hot_rank_base_url") or "").strip().rstrip("/") or None
    hot_rank_path = str(item.get("hot_rank_path") or "").strip() or None
    hot_rank_payload = item.get("hot_rank_payload")
    if hot_rank_payload is not None and not isinstance(hot_rank_payload, dict):
        raise HotContentFlowError(
            f"hot source hot_rank_payload must be a dict: {item!r}"
        )

    return HotSourceConfig(
        source=source,
        hot_rank_base_url=hot_rank_base_url,
        hot_rank_path=hot_rank_path,
        hot_rank_payload=hot_rank_payload,
    )


def _load_sources() -> list[HotSourceConfig]:
    raw_sources = _load_json_from_env_or_file("HOT_FLOW_SOURCES_JSON", "HOT_FLOW_SOURCES_FILE")
    if raw_sources is None:
        raw_sources = settings.hot_flow_sources
    if not isinstance(raw_sources, list):
        raise HotContentFlowError("HOT_FLOW_SOURCES_JSON/HOT_FLOW_SOURCES_FILE must be a list")

    sources = [_normalize_source_config(item) for item in raw_sources]
    if not sources:
        raise HotContentFlowError("hot sources cannot be empty")
    return sources


def _parse_cron_hours(value: str) -> str:
    hours = [item.strip() for item in value.split(",") if item.strip()]
    if not hours:
        raise HotContentFlowError("hot flow cron hours cannot be empty")
    normalized: list[str] = []
    for hour in hours:
        try:
            hour_num = int(hour)
        except ValueError as exc:
            raise HotContentFlowError(f"invalid hot flow cron hour: {hour!r}") from exc
        if not 0 <= hour_num <= 23:
            raise HotContentFlowError(f"hot flow cron hour out of range: {hour_num}")
        normalized.append(str(hour_num))
    return ",".join(normalized)


def _load_category_filter_categories() -> list[str]:
    raw = _load_json_from_env_or_file(
        "CATEGORY_FILTER_CATEGORIES_JSON",
        "CATEGORY_FILTER_CATEGORIES_FILE",
    )
    if raw is None:
        return list(DEFAULT_ELDERLY_CATEGORY_LIST)
    if not isinstance(raw, list):
        raise HotContentFlowError(
            "CATEGORY_FILTER_CATEGORIES_JSON/CATEGORY_FILTER_CATEGORIES_FILE must be a list"
        )
    categories = [str(item).strip() for item in raw if str(item).strip()]
    if not categories:
        raise HotContentFlowError("category filter categories cannot be empty")
    return categories


def load_flow_config(interval_override: int | None = None) -> FlowConfig:
    crawapi_base_url = _get_env("CRAWAPI_BASE_URL", settings.crawapi_base_url).rstrip("/")
    hot_rank_path = _get_env(
        "CRAWAPI_HOT_CONTENT_RANK_PATH",
        settings.crawapi_hot_content_rank_path,
    )
    if not crawapi_base_url:
        raise HotContentFlowError("missing CRAWAPI_BASE_URL or settings.crawapi_base_url")
    if not hot_rank_path:
        raise HotContentFlowError(
            "missing CRAWAPI_HOT_CONTENT_RANK_PATH or settings.crawapi_hot_content_rank_path"
        )

    interval_seconds = (
        interval_override
        if interval_override is not None
        else _get_env_int("HOT_FLOW_INTERVAL_SECONDS", settings.hot_flow_interval_seconds)
    )
    return FlowConfig(
        crawapi_base_url=crawapi_base_url,
        hot_rank_path=hot_rank_path,
        keyword_search_path=_get_env(
            "CRAWAPI_KEYWORD_SEARCH_PATH",
            settings.crawapi_keyword_search_path,
        ),
        decode_api_url=_get_env("DECODE_API_URL", settings.decode_api_url),
        decode_result_api_url=_get_env(
            "DECODE_RESULT_API_URL",
            settings.decode_result_api_url,
        ),
        decode_config_id=_get_env_int("DECODE_CONFIG_ID", settings.decode_config_id),
        request_timeout_seconds=_get_env_int(
            "REQUEST_TIMEOUT_SECONDS",
            settings.request_timeout_seconds,
        ),
        https_verify_ssl=_get_env_bool("HTTPS_VERIFY_SSL", settings.https_verify_ssl),
        hot_flow_cron_hours=_parse_cron_hours(
            _get_env("HOT_FLOW_CRON_HOURS", settings.hot_flow_cron_hours)
        ),
        hot_flow_cron_minute=_get_env_int(
            "HOT_FLOW_CRON_MINUTE",
            settings.hot_flow_cron_minute,
        ),
        schedule_interval_seconds=interval_seconds,
        decode_result_interval_seconds=_get_env_int(
            "DECODE_RESULT_FLOW_INTERVAL_SECONDS",
            settings.decode_result_flow_interval_seconds,
        ),
        decode_result_batch_size=_get_env_int(
            "DECODE_RESULT_BATCH_SIZE",
            settings.decode_result_batch_size,
        ),
        contribution_score_threshold=float(
            _get_env(
                "CONTRIBUTION_SCORE_THRESHOLD",
                str(settings.contribution_score_threshold),
            )
        ),
        demand_pool_source_table=_get_env(
            "DEMAND_POOL_SOURCE_TABLE",
            settings.demand_pool_source_table,
        ),
        demand_pool_excluded_strategy=_get_env(
            "DEMAND_POOL_EXCLUDED_STRATEGY",
            settings.demand_pool_excluded_strategy,
        ),
        demand_pool_top_n=_get_env_int(
            "DEMAND_POOL_TOP_N",
            settings.demand_pool_top_n,
        ),
        hot_demand_pool_strategy=_get_env(
            "HOT_DEMAND_POOL_STRATEGY",
            settings.hot_demand_pool_strategy,
        ),
        wxindex_score_threshold=_get_env_float(
            "WXINDEX_SCORE_THRESHOLD",
            _get_env_float(
                "HOT_DEMAND_POOL_WXINDEX_THRESHOLD",
                _get_env_float(
                    "WXINDEX_LATEST_SCORE_THRESHOLD",
                    settings.wxindex_score_threshold,
                ),
            ),
        ),
        odps_daily_write_limit=_get_env_int(
            "ODPS_DAILY_WRITE_LIMIT",
            settings.odps_daily_write_limit,
        ),
        postprocess_batch_size=_get_env_int(
            "POSTPROCESS_BATCH_SIZE",
            settings.postprocess_batch_size,
        ),
        contribution_match_llm_model=_get_env(
            "CONTRIBUTION_MATCH_LLM_MODEL",
            settings.contribution_match_llm_model,
        ),
        contribution_match_llm_max_attempts=_get_env_int(
            "CONTRIBUTION_MATCH_LLM_MAX_ATTEMPTS",
            settings.contribution_match_llm_max_attempts,
        ),
        contribution_match_llm_retry_sleep_seconds=_get_env_float(
            "CONTRIBUTION_MATCH_LLM_RETRY_SLEEP_SECONDS",
            settings.contribution_match_llm_retry_sleep_seconds,
        ),
        contribution_match_llm_max_tokens=_get_env_int(
            "CONTRIBUTION_MATCH_LLM_MAX_TOKENS",
            settings.contribution_match_llm_max_tokens,
        ),
        wxindex_llm_model=_get_env("WXINDEX_LLM_MODEL", settings.wxindex_llm_model),
        wxindex_llm_max_attempts=_get_env_int(
            "WXINDEX_LLM_MAX_ATTEMPTS",
            settings.wxindex_llm_max_attempts,
        ),
        wxindex_llm_max_tokens=_get_env_int(
            "WXINDEX_LLM_MAX_TOKENS",
            settings.wxindex_llm_max_tokens,
        ),
        wxindex_api_url=_get_env("WXINDEX_API_URL", settings.wxindex_api_url),
        wxindex_lookback_days=_get_env_int(
            "WXINDEX_LOOKBACK_DAYS",
            settings.wxindex_lookback_days,
        ),
        wxindex_words_cron_hour=_get_env_int(
            "WXINDEX_WORDS_CRON_HOUR",
            settings.wxindex_words_cron_hour,
        ),
        wxindex_words_cron_minute=_get_env_int(
            "WXINDEX_WORDS_CRON_MINUTE",
            settings.wxindex_words_cron_minute,
        ),
        demand_event_sense_threshold=_get_env_float(
            "DEMAND_EVENT_SENSE_THRESHOLD",
            settings.demand_event_sense_threshold,
        ),
        demand_senior_fit_threshold=_get_env_float(
            "DEMAND_SENIOR_FIT_THRESHOLD",
            settings.demand_senior_fit_threshold,
        ),
        demand_quality_llm_model=_get_env(
            "DEMAND_QUALITY_LLM_MODEL",
            settings.demand_quality_llm_model,
        ),
        demand_quality_llm_max_attempts=_get_env_int(
            "DEMAND_QUALITY_LLM_MAX_ATTEMPTS",
            settings.demand_quality_llm_max_attempts,
        ),
        demand_quality_llm_retry_sleep_seconds=_get_env_float(
            "DEMAND_QUALITY_LLM_RETRY_SLEEP_SECONDS",
            settings.demand_quality_llm_retry_sleep_seconds,
        ),
        demand_quality_llm_max_tokens=_get_env_int(
            "DEMAND_QUALITY_LLM_MAX_TOKENS",
            settings.demand_quality_llm_max_tokens,
        ),
        category_filter_llm_model=_get_env(
            "CATEGORY_FILTER_LLM_MODEL",
            settings.category_filter_llm_model,
        ),
        category_filter_llm_max_attempts=_get_env_int(
            "CATEGORY_FILTER_LLM_MAX_ATTEMPTS",
            settings.category_filter_llm_max_attempts,
        ),
        category_filter_llm_retry_sleep_seconds=_get_env_float(
            "CATEGORY_FILTER_LLM_RETRY_SLEEP_SECONDS",
            settings.category_filter_llm_retry_sleep_seconds,
        ),
        category_filter_llm_max_tokens=_get_env_int(
            "CATEGORY_FILTER_LLM_MAX_TOKENS",
            settings.category_filter_llm_max_tokens,
        ),
        category_filter_body_max_chars=_get_env_int(
            "CATEGORY_FILTER_BODY_MAX_CHARS",
            settings.category_filter_body_max_chars,
        ),
        category_filter_item_sleep_seconds=_get_env_float(
            "CATEGORY_FILTER_ITEM_SLEEP_SECONDS",
            settings.category_filter_item_sleep_seconds,
        ),
        category_filter_categories=_load_category_filter_categories(),
        sources=_load_sources(),
        mysql=MysqlConfig(
            host=_get_env("MYSQL_HOST", settings.mysql_host),
            port=_get_env_int("MYSQL_PORT", settings.mysql_port),
            user=_get_env("MYSQL_USER", settings.mysql_user),
            password=_get_env("MYSQL_PASSWORD", settings.mysql_password),
            database=_get_env("MYSQL_DATABASE", settings.mysql_database),
            charset=_get_env("MYSQL_CHARSET", settings.mysql_charset),
        ),
    )