"""同步管理只读查询；只公开受控元数据，不公开源数据和原异常。"""

from app.core.exceptions import NotFoundError
from app.core.response import PageResult
from app.core.tplus_db import resolve_tplus_settings
from app.repositories import tplus_repository as repository
from app.schemas.tplus import (
    TPlusBatchDetailOut,
    TPlusBatchOut,
    TPlusErrorOut,
    TPlusOverviewOut,
)
from app.services.tplus import progress, task_service
from app.services.tplus.automation import overview as automation_overview
from app.services.tplus.errors import MESSAGES
from app.services.tplus.mapping import DETAIL_MAPPINGS, TPLUS_MAPPINGS
from app.services.tplus.relationship_audit import public_report

ERROR_MESSAGES = {
    "READ_ERROR": "源数据读取失败，请检查只读连接和字段映射",
    "STAGE_ERROR": "原始数据保存失败，请核对字段类型后重试",
    "INTERRUPTED": "执行进程中断，可重新读取，已保存数据会自动去重",
    "EXECUTION_ERROR": "任务执行失败，请检查只读连接和字段映射",
    "TYPE_UNRESOLVED": "关联核验所需的单据类型缺失或不唯一",
}
_ENTITY_TYPES = {item.entity_type for item in (*TPLUS_MAPPINGS, *DETAIL_MAPPINGS)}
ERROR_MESSAGES.update(MESSAGES)


def batch_out(batch, active_parents: set[str], report=None) -> TPlusBatchOut:
    """只使用元数据字段组装输出，历史批次范围保持未知。"""
    entities = batch.entity_types_json
    scope_valid = (
        isinstance(entities, list)
        and bool(entities)
        and all(isinstance(item, str) and item in _ENTITY_TYPES for item in entities)
    )
    return TPlusBatchOut(
        batch_no=batch.batch_no,
        task_type="AUDIT" if batch.sync_mode == "AUDIT" else "READ",
        status=batch.status,
        entity_types=entities if scope_valid else None,
        source_record_count=batch.source_record_count,
        staged_record_count=batch.staged_record_count,
        skipped_record_count=batch.skipped_record_count,
        failed_record_count=batch.failed_record_count,
        parent_batch_no=batch.parent_batch_no,
        create_time=batch.create_time,
        started_at=batch.started_at,
        finished_at=batch.finished_at,
        can_retry=batch.status in ("FAILED", "PARTIAL")
        and (batch.sync_mode == "AUDIT" or (batch.sync_mode == "FULL" and scope_valid))
        and batch.batch_no not in active_parents,
        error_summary="任务有异常，请查看异常明细"
        if batch.status in ("FAILED", "PARTIAL")
        else None,
        trigger_type=getattr(batch, "trigger_type", "MANUAL") or "MANUAL",
        automatic_attempt=getattr(batch, "automatic_attempt", 0) or 0,
        progress=progress.public(batch, report),
    )


def get_batch(session, number: str) -> TPlusBatchDetailOut:
    """按需加载报告，未找到时统一返回 404。"""
    batch = repository.get_batch(session, number, with_result=True)
    if batch is None:
        raise NotFoundError("同步批次不存在")
    out = batch_out(batch, repository.active_retry_parents(session, [number]))
    return TPlusBatchDetailOut(
        **out.model_dump(), audit_result=public_report(batch.audit_result_json)
        if batch.sync_mode == "AUDIT" else None
    )


def list_batches(session, query):
    """分页批次并批量查询重试状态。"""
    rows, total = repository.list_batches(session, query)
    active = repository.active_retry_parents(session, [row.batch_no for row in rows])
    reports = repository.progress_reports(session, [row.batch_no for row in rows])
    return PageResult[TPlusBatchOut](
        records=[batch_out(row, active, reports.get(row.batch_no)) for row in rows],
        total=total,
        page_num=query.page_num,
        page_size=query.page_size,
    )


def _safe_id(value) -> str | None:
    if isinstance(value, str) and value.isascii() and value.isdigit() and len(value) <= 10:
        return value if int(value) <= 2147483647 else None
    return None


def list_errors(session, number, query):
    """错误按编码生成固定说明，避免驱动异常泄漏连接参数。"""
    if repository.get_batch(session, number) is None:
        raise NotFoundError("同步批次不存在")
    rows, total = repository.list_errors(session, number, query)
    records = [
        TPlusErrorOut(
            id=row.id,
            entity_type=row.entity_type if row.entity_type in _ENTITY_TYPES else "system",
            source_id=_safe_id(row.source_id),
            error_code=row.error_code if row.error_code in ERROR_MESSAGES else "UNKNOWN",
            error_message=ERROR_MESSAGES.get(row.error_code, "任务未完成，请核对配置后重试"),
            retry_count=row.retry_count,
            create_time=row.create_time,
        )
        for row in rows
    ]
    return PageResult[TPlusErrorOut](
        records=records, total=total, page_num=query.page_num, page_size=query.page_size
    )


def overview(session) -> TPlusOverviewOut:
    """只校验配置，不在页面查询期间建立 T+ 连接。"""
    settings = task_service.get_settings()
    try:
        resolve_tplus_settings(settings)
        configured, message = True, "只读配置已就绪，实际连接结果以任务执行为准"
    except RuntimeError:
        configured = False
        message = (
            "源读取未开启，仍可查看已有采集记录和资料"
            if not settings.t_plus_enabled
            else "T+ 只读配置未就绪，请联系管理员配置"
        )
    latest = repository.latest_audit(session)
    current = repository.current_batch(session)
    return TPlusOverviewOut(
        is_configured=configured,
        configuration_message=message,
        status_counts=repository.status_counts(session),
        total_staged_records=repository.total_staged_records(session),
        current_batch=batch_out(current, set()) if current else None,
        latest_audit=public_report(latest.audit_result_json) if latest else None,
        automation=automation_overview(session, settings=task_service.get_settings()),
    )