import { createUserDataSpaceService } from './user-data-space-service.mjs';
import { ensureHealthPageDataForUser } from './health-page-data-bootstrap.mjs';
import { HEALTH_BASELINES_DATASET } from './health-page-data-schema.mjs';
import {
  baselineRowKey,
  mapBaselineToPgPayload,
  mapPgBaselineRow,
  serializeBaselineRow,
} from './health-baseline-serialize.mjs';

const DATASET_NAME = HEALTH_BASELINES_DATASET.name;

export function createPageDataHealthBaselineStore({
  resolveWorkspaceRoot,
  logger = console,
} = {}) {
  if (typeof resolveWorkspaceRoot !== 'function') {
    throw new Error('createPageDataHealthBaselineStore requires resolveWorkspaceRoot');
  }

  async function getUserDataSpace(userId) {
    const workspaceRoot = await resolveWorkspaceRoot(userId);
    if (!workspaceRoot) return null;
    const service = createUserDataSpaceService({ workspaceRoot, userId: String(userId) });
    await ensureHealthPageDataForUser(service, userId);
    return service;
  }

  async function list(userId) {
    const service = await getUserDataSpace(userId);
    if (!service) return [];
    try {
      const result = await service.readDatasetRows(DATASET_NAME, {
        limit: 200,
        orderBy: 'computed_at',
        orderDir: 'desc',
      });
      return (result.rows ?? []).map((row) => mapPgBaselineRow(row, userId));
    } catch (error) {
      if (error?.code === 'dataset_not_found') return [];
      throw error;
    }
  }

  return {
    backend: 'page_data',
    list,
    async upsertMany(userId, baselines = [], { computedAt = Date.now() } = {}) {
      const service = await getUserDataSpace(userId);
      if (!service) {
        const error = Object.assign(new Error('用户健康基线空间不可用'), { code: 'health_storage_unavailable' });
        throw error;
      }
      const existing = await list(userId);
      const index = new Map(existing.map((row) => [baselineRowKey(row), row]));
      const merged = [];
      for (const base of baselines) {
        const serialized = serializeBaselineRow(base, computedAt);
        const rowKey = baselineRowKey(serialized);
        const prior = index.get(rowKey);
        const payload = mapBaselineToPgPayload(serialized);
        try {
          if (prior?.id) {
            const { row } = await service.updateDatasetRow(DATASET_NAME, prior.id, payload);
            merged.push(mapPgBaselineRow(row, userId));
          } else {
            const { row } = await service.insertDatasetRow(DATASET_NAME, payload);
            merged.push(mapPgBaselineRow(row, userId));
          }
        } catch (error) {
          logger.warn?.('Page Data health baseline upsert failed:', error);
          throw error;
        }
      }
      return merged;
    },
  };
}