from __future__ import annotations

from sqlalchemy.orm import Session

from app.db.repositories import diagnosis as diagnosis_repo
from app.db.repositories import evaluation as evaluation_repo
from app.db.repositories import monitoring as monitoring_repo
from app.db.repositories import work_order as work_order_repo
from app.schemas.dashboard import DashboardOverview, KpiCard
from app.services.mine_service import resolve_mine


def get_dashboard_overview(
    db: Session,
    mine_id: str | None = None,
) -> DashboardOverview:
    mine = resolve_mine(db, mine_id)
    monitoring = monitoring_repo.monitoring_overview(db, mine.id)
    defects = diagnosis_repo.result_summary(db, mine.id)
    work_orders = work_order_repo.status_summary(db, mine.id)
    runs = evaluation_repo.list_runs(db, mine.id, limit=1)
    latest_run = runs[0] if runs else None

    kpis = [
        KpiCard(
            key="sensors",
            label="传感器总数",
            value=monitoring["sensor_count"],
            unit="台",
            status="normal",
        ),
        KpiCard(
            key="online_rate",
            label="设备在线率",
            value=round(
                monitoring["online_sensor_count"] / max(monitoring["sensor_count"], 1) * 100,
                1,
            ),
            unit="%",
            status="normal"
            if monitoring["online_sensor_count"] >= monitoring["sensor_count"] * 0.95
            else "warning",
        ),
        KpiCard(
            key="alarms",
            label="未闭环告警",
            value=monitoring["open_alarm_count"],
            unit="条",
            status="danger" if monitoring["high_alarm_count"] else "warning",
        ),
        KpiCard(
            key="high_defects",
            label="高风险缺陷",
            value=defects.get("high", 0),
            unit="项",
            status="danger" if defects.get("high", 0) else "normal",
        ),
        KpiCard(
            key="score",
            label="综合评价得分",
            value=latest_run.total_score if latest_run and latest_run.total_score else "--",
            unit="分",
            status="normal",
        ),
    ]
    return DashboardOverview(
        mine_id=mine.id,
        mine_name=mine.name,
        kpis=kpis,
        data_source_status=[
            {
                "count": monitoring["data_source_count"],
                "online": monitoring["online_source_count"],
                "status": "online"
                if monitoring["online_source_count"] == monitoring["data_source_count"]
                else "partial",
            }
        ],
        diagnosis_summary=defects,
        evaluation_summary={
            "score": latest_run.total_score if latest_run else None,
            "grade": latest_run.grade if latest_run else "",
            "run_no": latest_run.run_no if latest_run else "",
        },
        open_work_order_count=sum(
            work_orders.get(status, 0)
            for status in ("pending", "processing", "review")
        ),
    )