"""ORM ↔ dataclass 映射与加解密边界。

本模块是 ``adapters/persistence`` 层**唯一**调用 ``yuxi.utils.crypto`` 加解密函数的位置。
所有 ORM 实例 ↔ dataclass 转换在此完成，core 层不接触 ORM，dataclass 始终持有明文。

设计原则（见设计方案 §4）：

- **mapper 不调用 ORM 的 ``to_dict`` 方法**：直接读 ORM 字段构造 dataclass。
  原因：``ExternalSystemToken.to_dict`` / ``ExternalWebhookSubscription.to_dict``
  不返回敏感字段明文（仅返回 ``has_access_token`` / ``has_secret`` 布尔字段），
  且 ``to_dict`` 返回的 dict 结构与 dataclass 字段不完全一致。
- **5 个含敏感字段的 dataclass** 在读取时解密、写入前加密：
  - dict 型敏感字段（``auth_config`` / ``secret_refs`` / ``adapter_config``）使用
    ``encrypt_sensitive_fields`` / ``decrypt_sensitive_fields``；
  - 单值敏感字段（``access_token`` / ``refresh_token`` / ``secret``）使用
    ``encrypt`` / ``decrypt``。
- **13 个无敏感字段的 dataclass** 直接字段映射。
- **解密失败时向上抛 ``ValueError``**，不掩盖密钥变更问题。
- ``ExternalSystem.env_count`` 是 ORM ``column_property`` 动态计算字段，mapper
  读取时直接读 ``orm.env_count``，dataclass → ORM 转换时跳过该字段（不写入 DB）。
"""

from __future__ import annotations

from typing import Any

from yuxi.external_systems.core.models import (
    AdapterAsset,
    Alert,
    AuditLog,
    Environment,
    Execution,
    ExecutionTrace,
    ExternalSystem,
    ExternalTool,
    HealthCheck,
    Metric,
    NotificationChannel,
    QuotaUsage,
    SecretRotationPolicy,
    SystemToken,
    ToolAccessRule,
    ToolTestCase,
    ToolVersion,
    WebhookEvent,
    WebhookSubscription,
)
from yuxi.storage.postgres.models_external import (
    ExternalAdapterAsset,
    ExternalNotificationChannel,
    ExternalSecretRotationPolicy,
    ExternalSystem as ExternalSystemORM,
    ExternalSystemAlert,
    ExternalSystemAuditLog,
    ExternalSystemEnvironment,
    ExternalSystemHealthCheck,
    ExternalSystemMetric,
    ExternalSystemQuotaUsage,
    ExternalSystemToken,
    ExternalToolAccessRule,
    ExternalToolConfig,
    ExternalToolConfigVersion,
    ExternalToolExecution,
    ExternalToolExecutionTrace,
    ExternalToolTestCase,
    ExternalWebhookEvent,
    ExternalWebhookSubscription,
)
from yuxi.utils.crypto import (
    decrypt,
    decrypt_sensitive_fields,
    encrypt,
    encrypt_sensitive_fields,
)

# ═══════════════════════════════════════════════════════════════════════════
# 含敏感字段的 dataclass（读取时解密 / 写入前加密）
# ═══════════════════════════════════════════════════════════════════════════


# ─── ExternalSystem（dict 型敏感字段：auth_config / secret_refs） ──────────


def orm_to_external_system(orm: ExternalSystemORM) -> ExternalSystem:
    """ORM → dataclass，解密 ``auth_config`` / ``secret_refs``。

    解密失败时抛 ``ValueError``（密钥变更场景），由调用方决定处理策略。
    ``env_count`` 为 ORM ``column_property`` 动态计算字段，直接读取。
    """
    return ExternalSystem(
        id=orm.id,
        slug=orm.slug,
        name=orm.name,
        description=orm.description,
        category=orm.category,
        adapter_type=orm.adapter_type,
        source_type=orm.source_type,
        enabled=orm.enabled,
        connection_config=orm.connection_config or {},
        auth_type=orm.auth_type,
        auth_config=decrypt_sensitive_fields(orm.auth_config) or {},
        secret_refs=decrypt_sensitive_fields(orm.secret_refs) or {},
        rate_limit=orm.rate_limit or {},
        circuit_breaker=orm.circuit_breaker or {},
        pool_config=orm.pool_config or {},
        observability=orm.observability or {},
        timeout=orm.timeout,
        retry_policy=orm.retry_policy or {},
        created_by=orm.created_by,
        updated_by=orm.updated_by,
        env_count=orm.env_count,
    )


def encrypt_system_for_write(data: dict[str, Any]) -> dict[str, Any]:
    """明文 dict → 密文 dict，加密 ``auth_config`` / ``secret_refs``。

    注意：``encrypt`` 不幂等，调用方必须保证传入的是明文（未被加密过）。
    """
    data = dict(data)
    if data.get("auth_config") is not None:
        data["auth_config"] = encrypt_sensitive_fields(data["auth_config"])
    if data.get("secret_refs") is not None:
        data["secret_refs"] = encrypt_sensitive_fields(data["secret_refs"])
    return data


# ─── Environment（dict 型敏感字段：auth_config） ──────────────────────────


def orm_to_environment(orm: ExternalSystemEnvironment) -> Environment:
    """ORM → dataclass，解密 ``auth_config``。"""
    return Environment(
        id=orm.id,
        system_id=orm.system_id,
        env_key=orm.env_key,
        name=orm.name,
        connection_config=orm.connection_config or {},
        auth_config=decrypt_sensitive_fields(orm.auth_config) or {},
        is_default=orm.is_default,
        enabled=orm.enabled,
    )


def encrypt_environment_for_write(data: dict[str, Any]) -> dict[str, Any]:
    """明文 dict → 密文 dict，加密 ``auth_config``。"""
    data = dict(data)
    if data.get("auth_config") is not None:
        data["auth_config"] = encrypt_sensitive_fields(data["auth_config"])
    return data


# ─── ExternalTool（dict 型敏感字段：auth_config / adapter_config） ──────────


def orm_to_external_tool(orm: ExternalToolConfig) -> ExternalTool:
    """ORM → dataclass，解密 ``auth_config`` / ``adapter_config``。

    注意：``adapter_config`` 在 ORM 中 ``nullable=False``，但可能包含敏感字段
    （如 mTLS 证书路径），统一走 ``decrypt_sensitive_fields``。
    """
    return ExternalTool(
        id=orm.id,
        slug=orm.slug,
        name=orm.name,
        description=orm.description,
        category=orm.category,
        adapter_type=orm.adapter_type,
        auth_type=orm.auth_type,
        adapter_config=decrypt_sensitive_fields(orm.adapter_config) or {},
        auth_config=decrypt_sensitive_fields(orm.auth_config) or {},
        timeout=orm.timeout,
        retry_policy=orm.retry_policy or {},
        enabled=orm.enabled,
        system_id=orm.system_id,
        created_by=orm.created_by,
        updated_by=orm.updated_by,
    )


def encrypt_tool_for_write(data: dict[str, Any]) -> dict[str, Any]:
    """明文 dict → 密文 dict，加密 ``auth_config`` / ``adapter_config``。"""
    data = dict(data)
    if data.get("auth_config") is not None:
        data["auth_config"] = encrypt_sensitive_fields(data["auth_config"])
    if data.get("adapter_config") is not None:
        data["adapter_config"] = encrypt_sensitive_fields(data["adapter_config"])
    return data


# ─── SystemToken（单值加密：access_token / refresh_token） ─────────────────


def orm_to_system_token(orm: ExternalSystemToken) -> SystemToken:
    """ORM → dataclass，单值解密 ``access_token`` / ``refresh_token``。

    注意：不调用 ``orm.to_dict()``（它只返回 ``has_access_token`` 布尔字段）。
    """
    return SystemToken(
        id=orm.id,
        system_id=orm.system_id,
        env_key=orm.env_key,
        token_type=orm.token_type,
        access_token=decrypt(orm.access_token) if orm.access_token else "",
        refresh_token=decrypt(orm.refresh_token) if orm.refresh_token else None,
        expires_at=orm.expires_at,
        extra=orm.extra or {},
        is_invalidated=orm.is_invalidated,
    )


def encrypt_token_for_write(data: dict[str, Any]) -> dict[str, Any]:
    """明文 dict → 密文 dict，单值加密 ``access_token`` / ``refresh_token``。"""
    data = dict(data)
    if data.get("access_token"):
        data["access_token"] = encrypt(data["access_token"])
    if data.get("refresh_token"):
        data["refresh_token"] = encrypt(data["refresh_token"])
    return data


# ─── WebhookSubscription（单值加密：secret） ──────────────────────────────


def orm_to_webhook_subscription(orm: ExternalWebhookSubscription) -> WebhookSubscription:
    """ORM → dataclass，单值解密 ``secret``。

    注意：不调用 ``orm.to_dict()``（它只返回 ``has_secret`` 布尔字段）。
    """
    return WebhookSubscription(
        id=orm.id,
        slug=orm.slug,
        name=orm.name,
        system_id=orm.system_id,
        source_event_type=orm.source_event_type,
        target_handler_type=orm.target_handler_type,
        callback_path=orm.callback_path,
        description=orm.description or "",
        env_key=orm.env_key,
        subscription_id=orm.subscription_id,
        target_handler_id=orm.target_handler_id,
        secret=decrypt(orm.secret) if orm.secret else None,
        secret_algorithm=orm.secret_algorithm,
        filter_rules=orm.filter_rules or {},
        transform_rules=orm.transform_rules or {},
        status=orm.status,
        enabled=orm.enabled,
        expires_at=orm.expires_at,
        auto_renew=orm.auto_renew,
        last_renewed_at=orm.last_renewed_at,
        last_renew_error=orm.last_renew_error,
        renewal_attempts=orm.renewal_attempts,
        last_received_at=orm.last_received_at,
        received_count=orm.received_count,
        retention_days=orm.retention_days,
        created_by=orm.created_by,
        updated_by=orm.updated_by,
    )


def encrypt_webhook_subscription_for_write(data: dict[str, Any]) -> dict[str, Any]:
    """明文 dict → 密文 dict，单值加密 ``secret``。"""
    data = dict(data)
    if data.get("secret"):
        data["secret"] = encrypt(data["secret"])
    return data


# ═══════════════════════════════════════════════════════════════════════════
# 无敏感字段的 dataclass（直接字段映射）
# ═══════════════════════════════════════════════════════════════════════════


def orm_to_tool_version(orm: ExternalToolConfigVersion) -> ToolVersion:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return ToolVersion(
        id=orm.id,
        tool_slug=orm.tool_slug,
        version_id=orm.version_id,
        snapshot=orm.snapshot or {},
        created_by=orm.created_by,
    )


def orm_to_adapter_asset(orm: ExternalAdapterAsset) -> AdapterAsset:
    """ORM → dataclass，无敏感字段，直接映射。``content`` 为二进制原值。"""
    return AdapterAsset(
        id=orm.id,
        adapter_type=orm.adapter_type,
        asset_type=orm.asset_type,
        name=orm.name,
        content=orm.content or b"",
        size=orm.size or 0,
        checksum=orm.checksum,
        status=orm.status,
        status_message=orm.status_message,
        created_by=orm.created_by,
        updated_by=orm.updated_by,
        created_at=orm.created_at,
        updated_at=orm.updated_at,
    )


def orm_to_execution(orm: ExternalToolExecution) -> Execution:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return Execution(
        id=orm.id,
        execution_id=orm.execution_id,
        trace_id=orm.trace_id,
        system_id=orm.system_id,
        env_key=orm.env_key,
        tool_slug=orm.tool_slug,
        caller=orm.caller,
        caller_id=orm.caller_id,
        status=orm.status,
        started_at=orm.started_at,
        operation=orm.operation,
        request_summary=orm.request_summary or {},
        response_summary=orm.response_summary,
        error=orm.error,
        ended_at=orm.ended_at,
        duration_ms=orm.duration_ms,
        correlation_id=orm.correlation_id,
        retry_of=orm.retry_of,
        retry_count=orm.retry_count,
        tags=orm.tags or {},
    )


def orm_to_execution_trace(orm: ExternalToolExecutionTrace) -> ExecutionTrace:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return ExecutionTrace(
        id=orm.id,
        execution_id=orm.execution_id,
        trace_id=orm.trace_id,
        spans=orm.spans or {},
        total_duration_ms=orm.total_duration_ms,
    )


def orm_to_audit_log(orm: ExternalSystemAuditLog) -> AuditLog:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return AuditLog(
        id=orm.id,
        system_id=orm.system_id,
        env_key=orm.env_key,
        event_type=orm.event_type,
        action_type=orm.action_type,
        resource=orm.resource,
        user=orm.user,
        detail=orm.detail or {},
        snapshot_before=orm.snapshot_before,
        snapshot_after=orm.snapshot_after,
        description=orm.description,
        created_at=orm.created_at,
    )


def orm_to_metric(orm: ExternalSystemMetric) -> Metric:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return Metric(
        id=orm.id,
        system_id=orm.system_id,
        env_key=orm.env_key,
        bucket_at=orm.bucket_at,
        total_calls=orm.total_calls,
        success_calls=orm.success_calls,
        failed_calls=orm.failed_calls,
        auth_failed_calls=orm.auth_failed_calls,
        ssrf_blocked_calls=orm.ssrf_blocked_calls,
        timeout_calls=orm.timeout_calls,
        latency_sum_ms=orm.latency_sum_ms,
        latency_count=orm.latency_count,
        p99_latency_ms=orm.p99_latency_ms,
        token_refresh_count=orm.token_refresh_count,
        token_refresh_failed=orm.token_refresh_failed,
        throttled_count=orm.throttled_count,
        circuit_open_count=orm.circuit_open_count,
    )


def orm_to_health_check(orm: ExternalSystemHealthCheck) -> HealthCheck:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return HealthCheck(
        id=orm.id,
        system_id=orm.system_id,
        env_key=orm.env_key,
        health_status=orm.health_status,
        duration_ms=orm.duration_ms,
        detail=orm.detail,
        error_code=orm.error_code,
        error_message=orm.error_message,
        checked_at=orm.checked_at,
    )


def orm_to_webhook_event(orm: ExternalWebhookEvent) -> WebhookEvent:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return WebhookEvent(
        id=orm.id,
        subscription_id=orm.subscription_id,
        subscription_slug=orm.subscription_slug,
        event_type=orm.event_type,
        payload=orm.payload or {},
        received_at=orm.received_at,
        external_event_id=orm.external_event_id,
        payload_hash=orm.payload_hash,
        headers=orm.headers or {},
        signature=orm.signature,
        signature_verified=orm.signature_verified,
        source_ip=orm.source_ip,
        processing_status=orm.processing_status,
        processing_attempts=orm.processing_attempts,
        last_processed_at=orm.last_processed_at,
        processing_error=orm.processing_error,
        correlation_id=orm.correlation_id,
        triggered_handler_type=orm.triggered_handler_type,
        triggered_handler_id=orm.triggered_handler_id,
        triggered_execution_id=orm.triggered_execution_id,
    )


def orm_to_quota_usage(orm: ExternalSystemQuotaUsage) -> QuotaUsage:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return QuotaUsage(
        id=orm.id,
        system_id=orm.system_id,
        quota_key=orm.quota_key,
        quota_name=orm.quota_name,
        quota_window=orm.quota_window,
        env_key=orm.env_key,
        window_start=orm.window_start,
        window_end=orm.window_end,
        limit_value=orm.limit_value,
        used_value=orm.used_value,
        unit=orm.unit,
        source=orm.source,
        source_header_name=orm.source_header_name,
        warning_threshold=orm.warning_threshold,
        critical_threshold=orm.critical_threshold,
        last_updated_at=orm.last_updated_at,
        last_response_at=orm.last_response_at,
    )


def orm_to_alert(orm: ExternalSystemAlert) -> Alert:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return Alert(
        id=orm.id,
        system_id=orm.system_id,
        alert_type=orm.alert_type,
        title=orm.title,
        triggered_at=orm.triggered_at,
        env_key=orm.env_key,
        severity=orm.severity,
        status=orm.status,
        description=orm.description,
        detail=orm.detail or {},
        resource_type=orm.resource_type,
        resource_id=orm.resource_id,
        related_execution_id=orm.related_execution_id,
        related_trace_id=orm.related_trace_id,
        metric_snapshot=orm.metric_snapshot,
        dedup_key=orm.dedup_key,
        resolved_at=orm.resolved_at,
        acknowledged_by=orm.acknowledged_by,
        acknowledged_at=orm.acknowledged_at,
        resolution_note=orm.resolution_note,
        notification_status=orm.notification_status,
        notification_sent_at=orm.notification_sent_at,
        notification_channels=orm.notification_channels or {},
    )


def orm_to_secret_rotation_policy(orm: ExternalSecretRotationPolicy) -> SecretRotationPolicy:
    """ORM → dataclass，无敏感字段，直接映射。

    注意：``secret_ref`` 仅是引用 key（指向 ``ExternalSystem.secret_refs`` 中的具名 secret），
    非敏感值本身，不加密。
    """
    return SecretRotationPolicy(
        id=orm.id,
        system_id=orm.system_id,
        secret_type=orm.secret_type,
        secret_name=orm.secret_name,
        secret_ref=orm.secret_ref,
        env_key=orm.env_key,
        rotation_mode=orm.rotation_mode,
        rotation_interval_days=orm.rotation_interval_days,
        notify_before_days=orm.notify_before_days,
        notify_channels=orm.notify_channels or {},
        last_rotated_at=orm.last_rotated_at,
        next_rotation_at=orm.next_rotation_at,
        last_rotation_at=orm.last_rotation_at,
        last_rotation_status=orm.last_rotation_status,
        last_rotation_error=orm.last_rotation_error,
        rotation_count=orm.rotation_count,
        max_rotation_retries=orm.max_rotation_retries,
        status=orm.status,
    )


def orm_to_tool_access_rule(orm: ExternalToolAccessRule) -> ToolAccessRule:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return ToolAccessRule(
        id=orm.id,
        principal_type=orm.principal_type,
        principal_id=orm.principal_id,
        created_by=orm.created_by,
        tool_slug=orm.tool_slug,
        system_id=orm.system_id,
        principal_name=orm.principal_name,
        env_key=orm.env_key,
        effect=orm.effect,
        priority=orm.priority,
        conditions=orm.conditions or {},
        expires_at=orm.expires_at,
        enabled=orm.enabled,
        description=orm.description,
        updated_by=orm.updated_by,
    )


def orm_to_tool_test_case(orm: ExternalToolTestCase) -> ToolTestCase:
    """ORM → dataclass，无敏感字段，直接映射。"""
    return ToolTestCase(
        id=orm.id,
        tool_slug=orm.tool_slug,
        name=orm.name,
        request_fixture=orm.request_fixture or {},
        created_by=orm.created_by,
        description=orm.description,
        env_key=orm.env_key,
        expected_status=orm.expected_status,
        assertions=orm.assertions or [],
        timeout=orm.timeout,
        enabled=orm.enabled,
        schedule_cron=orm.schedule_cron,
        alert_on_failure=orm.alert_on_failure,
        alert_threshold=orm.alert_threshold,
        last_run_at=orm.last_run_at,
        last_run_status=orm.last_run_status,
        last_run_duration_ms=orm.last_run_duration_ms,
        last_run_response=orm.last_run_response,
        last_run_error=orm.last_run_error,
        last_run_assertions_result=orm.last_run_assertions_result,
        consecutive_failures=orm.consecutive_failures,
        updated_by=orm.updated_by,
    )


# ─── NotificationChannel（dict 型敏感字段：config） ────────────────────────


def orm_to_notification_channel(orm: ExternalNotificationChannel) -> NotificationChannel:
    """ORM → dataclass，dict 型解密 ``config``。

    解密失败时抛 ``ValueError``（密钥变更场景），由调用方决定处理策略。
    注意：不调用 ``orm.to_dict()``（它只返回 ``has_config`` 布尔字段）。
    """
    return NotificationChannel(
        id=orm.id,
        channel_type=orm.channel_type,
        name=orm.name,
        config=decrypt_sensitive_fields(orm.config) or {},
        enabled=orm.enabled,
        description=orm.description,
        created_by=orm.created_by,
        updated_by=orm.updated_by,
        created_at=orm.created_at,
        updated_at=orm.updated_at,
    )


def encrypt_notification_channel_for_write(data: dict[str, Any]) -> dict[str, Any]:
    """明文 dict → 密文 dict，dict 型加密 ``config``。

    注意：``encrypt_sensitive_fields`` 不幂等，调用方必须保证传入的是明文（未被加密过）。
    """
    data = dict(data)
    if data.get("config") is not None:
        data["config"] = encrypt_sensitive_fields(data["config"])
    return data