"""数据库连接配置 —— 所有存储引擎配置模型

每个具体配置类通过 env_prefix 从环境变量读取敏感信息。
默认值仅包含安全的占位值，生产凭证必须通过环境变量注入。
"""

from pydantic_settings import BaseSettings, SettingsConfigDict


class DatabaseConfig(BaseSettings):
    """数据库连接配置基类

    通过 backend 字段指定存储引擎类型：
      - "mysql" / ""  → MySQLBackend
      - "postgresql"  → PgBackend
      - "milvus"      → MilvusBackend
      - "redis"       → RedisBackend
    """

    host: str = "127.0.0.1"
    port: int = 3306
    user: str = "root"
    password: str = ""
    db: str = "test"
    charset: str = "utf8mb4"
    minsize: int = 5
    maxsize: int = 20
    backend: str = ""

    model_config = SettingsConfigDict(
        env_prefix="", case_sensitive=False, extra="ignore"
    )

    def to_dict(self) -> dict:
        return {
            "host": self.host,
            "port": self.port,
            "user": self.user,
            "password": self.password,
            "db": self.db,
            "charset": self.charset,
            "minsize": self.minsize,
            "maxsize": self.maxsize,
        }


# ============ 业务数据库配置 ============


class AigcDatabaseConfig(DatabaseConfig):
    host: str = "rm-t4na9qj85v7790tf84o.mysql.singapore.rds.aliyuncs.com"
    user: str = "crawler_admin"
    password: str = "cyber#crawler_2023"
    db: str = "aigc-admin-prod"

    model_config = SettingsConfigDict(
        env_prefix="AIGC_DB_", env_file=".env", case_sensitive=False, extra="ignore"
    )


class LongVideoDatabaseConfig(DatabaseConfig):
    host: str = "rr-bp1x9785e8h5452bi157.mysql.rds.aliyuncs.com"
    user: str = "wx2016_longvideo"
    password: str = "wx2016_longvideoP@assword1234"
    db: str = "longvideo"

    model_config = SettingsConfigDict(
        env_prefix="LONG_VIDEO_DB_", env_file=".env", case_sensitive=False, extra="ignore"
    )


class LongArticlesDatabaseConfig(DatabaseConfig):
    host: str = "rm-bp14529nwwcw75yr1ko.mysql.rds.aliyuncs.com"
    user: str = "changwen_admin"
    password: str = "changwen@123456"
    db: str = "long_articles"

    model_config = SettingsConfigDict(
        env_prefix="LONG_ARTICLES_DB_", env_file=".env", case_sensitive=False, extra="ignore"
    )


class PiaoquanCrawlerDatabaseConfig(DatabaseConfig):
    host: str = "rm-bp1159bu17li9hi94.mysql.rds.aliyuncs.com"
    user: str = "crawler"
    password: str = "crawler123456@"
    db: str = "piaoquan-crawler"

    model_config = SettingsConfigDict(
        env_prefix="PIAOQUAN_CRAWLER_DB_", env_file=".env", case_sensitive=False, extra="ignore"
    )


class GrowthDatabaseConfig(DatabaseConfig):
    host: str = "rm-bp17q95335a99272b.mysql.rds.aliyuncs.com"
    user: str = "crawler"
    password: str = "crawler123456@"
    db: str = "growth"

    model_config = SettingsConfigDict(
        env_prefix="GROWTH_DB_", env_file=".env", case_sensitive=False, extra="ignore"
    )


class ContentDeconstructionSupplyConfig(DatabaseConfig):
    host: str = "rm-t4nh1xx6o2a6vj8qu3o.mysql.singapore.rds.aliyuncs.com"
    user: str = "content_rw"
    password: str = "bC1aH4bA1lB0"
    db: str = "content-deconstruction-supply"

    model_config = SettingsConfigDict(
        env_prefix="CONTENT_DECONSREUCTION_DB_", env_file=".env", case_sensitive=False, extra="ignore"
    )


# ============ PostgreSQL / Milvus / Redis 配置 ============


class PgConfig(BaseSettings):
    """PostgreSQL 连接配置"""

    host: str = "127.0.0.1"
    port: int = 5432
    user: str = "postgres"
    password: str = ""
    db: str = "postgres"
    minsize: int = 5
    maxsize: int = 20
    backend: str = "postgresql"

    model_config = SettingsConfigDict(
        env_prefix="PG_", env_file=".env", case_sensitive=False, extra="ignore"
    )


class MilvusConfig(BaseSettings):
    """Milvus 向量数据库连接配置"""

    host: str = "127.0.0.1"
    port: int = 19530
    user: str = ""
    password: str = ""
    backend: str = "milvus"

    model_config = SettingsConfigDict(
        env_prefix="MILVUS_", env_file=".env", case_sensitive=False, extra="ignore"
    )


class RedisConfig(BaseSettings):
    """Redis 连接配置"""

    host: str = "127.0.0.1"
    port: int = 6379
    password: str = ""
    db: int = 0
    backend: str = "redis"

    model_config = SettingsConfigDict(
        env_prefix="REDIS_", env_file=".env", case_sensitive=False, extra="ignore"
    )