import { Download, Square } from 'lucide-react';
import { Badge, Button, ProgressBar, PropertyRow } from '../components/ui';
import type { MobileDeployment } from '../mobile/training';
import { PretrainedIdentity } from './PretrainedSourceSelect';
import { TrainingMetricsPanel } from './TrainingMetricsPanel';
import { trainingLosses } from './trainingLosses';
import { ACTIVE_STATES, stateLabel } from './trainingPresentation';
import type { TrainingJob } from './types';

export function TrainingJobSection({
  job,
  mobileDeployment,
  busy,
  onContinue,
  onCancel,
  onImport,
  onNew,
}: {
  job: TrainingJob;
  mobileDeployment?: MobileDeployment;
  busy: boolean;
  onContinue(): void;
  onCancel(): void | Promise<void>;
  onImport(): void | Promise<void>;
  onNew(): void;
}) {
  const active = ACTIVE_STATES.has(job.state);
  return (
    <div className="mt-3 border-t border-border pt-3">
      <div className="mb-2 flex items-center justify-between gap-2">
        <span className="truncate text-xs font-medium text-text-primary" title={job.id}>
          {job.taskId}
        </span>
        <Badge
          tone={
            job.state === 'succeeded'
              ? 'success'
              : job.state === 'failed' || job.state === 'cancelled'
                ? 'warning'
                : 'accent'
          }
        >
          {stateLabel(job.state)}
        </Badge>
      </div>
      <PretrainedIdentity source={job.pretrained} />
      {mobileDeployment?.evaluation && (
        <div className="mt-2 text-xs">
          <PropertyRow label="阶段" value={mobileDeployment.trainingStage} />
          <PropertyRow
            label="独立评估成功率"
            value={`${(mobileDeployment.evaluation.successRate * 100).toFixed(1)}% / ${mobileDeployment.evaluation.episodes} 回合`}
          />
          <PropertyRow
            label="实测关节峰值"
            value={`${mobileDeployment.evaluation.maxJointVelocity.toFixed(3)} rad/s`}
          />
          <PropertyRow label="安全终止次数" value={mobileDeployment.evaluation.safetyStops} />
          <p className="text-warning">
            导出成功不代表策略达标；未达标策略导入仅用于调试，请先同阶段续训。
          </p>
        </div>
      )}
      {job.taskId === 'Unitree-Go2-Rough' && (
        <div>
          <p className="text-xs text-warning">仅后端评测：234 维 Rough 策略无法在浏览器加载。</p>
        </div>
      )}
      {job.deployment?.terrain && (
        <div>
          <p className="text-xs text-warning">
            导入会替换当前物理地图并启动配套策略，请先保存场景。
          </p>
          <Badge tone="warning">
            {job.deployment.terrain.approximation ? '近似碰撞布局' : '配套碰撞布局'}
          </Badge>
        </div>
      )}
      <ProgressBar value={job.progress} label="训练进度" />
      <div className="mt-2">
        <PropertyRow label="迭代" value={`${job.iteration} / ${job.maxIterations}`} />
        <p role="status" className="break-words text-xs text-text-secondary">
          {job.message}
        </p>
        {trainingLosses(job.logs).map(({ label, value }) => (
          <PropertyRow key={label} label={label} value={value} />
        ))}
      </div>
      <TrainingMetricsPanel key={job.id} jobId={job.id} logs={job.logs} />
      {job.logs.length > 0 && (
        <details className="mt-2">
          <summary className="cursor-pointer text-xs text-text-secondary">最近日志</summary>
          <pre className="mt-1 max-h-36 overflow-auto whitespace-pre-wrap break-all rounded bg-app p-2 text-xs leading-4 text-text-tertiary">
            {job.logs.slice(-40).join('\n')}
          </pre>
        </details>
      )}
      {mobileDeployment && job.state === 'succeeded' && (
        <Button disabled={busy} onClick={onContinue}>
          接续此作业（保留权重）
        </Button>
      )}
      <div className="mt-3 grid grid-cols-2 gap-2">
        {active ? (
          <Button
            variant="danger"
            className="col-span-2"
            icon={<Square className="h-3.5 w-3.5" />}
            disabled={busy}
            onClick={() => void onCancel()}
          >
            停止训练
          </Button>
        ) : (
          <>
            <Button
              disabled={
                busy ||
                !job.artifactReady ||
                job.taskId === 'Unitree-Go2-Rough' ||
                (job.deployment && !job.deployment.browserCompatible)
              }
              icon={<Download className="h-3.5 w-3.5" />}
              onClick={() => void onImport()}
            >
              导入策略
            </Button>
            <Button disabled={busy} onClick={onNew}>
              新建任务
            </Button>
          </>
        )}
      </div>
    </div>
  );
}