#!/usr/bin/env node

import { readFile } from 'node:fs/promises';
import path from 'node:path';
import {
  assertReadableFile,
  callSpacetimeProcedure,
  callSpacetimeProcedureViaCli,
  createSpacetimeWebIdentity,
  ensureProcedureOk,
  parseArgs,
} from './spacetime-migration-common.mjs';

try {
  const options = parseArgs(process.argv.slice(2));
  if (!options.in) {
    throw new Error('必须传入 --in。');
  }
  if (options.incremental === true && options.replaceExisting === true) {
    throw new Error('--incremental 不能和 --replace-existing 同时使用。');
  }

  const inPath = path.resolve(options.in);
  await assertReadableFile(inPath);
  const migrationJson = await readFile(inPath, 'utf8');
  if (!migrationJson.trim()) {
    throw new Error(`迁移文件为空: ${inPath}`);
  }

  const webOptions = await prepareWebImportOptions(options);
  let result;
  try {
    result = await importMigrationJsonDirect(webOptions, migrationJson);
  } finally {
    await revokeTemporaryWebIdentity(webOptions);
  }
  ensureProcedureOk(result);

  console.log(
    `[spacetime:migration:import] ${options.dryRun ? 'dry-run 完成' : '导入完成'}: ${inPath}`,
  );
  printTableStats(result.table_stats);
  printMigrationWarnings(result.warnings);
} catch (error) {
  console.error(
    `[spacetime:migration:import] ${error instanceof Error ? error.message : String(error)}`,
  );
  process.exit(1);
}

async function prepareWebImportOptions(options) {
  if (options.token) {
    return { ...options, useHttp: true };
  }

  const identity = await createSpacetimeWebIdentity(options);
  console.log(
    `[spacetime:migration:import] 已通过 Web API 创建临时 identity: ${identity.identity}`,
  );

  const authorizeResult = await callSpacetimeProcedureViaCli(
    options,
    'authorize_database_migration_operator',
    {
      bootstrap_secret: options.bootstrapSecret || '',
      operator_identity_hex: identity.identity,
      note: options.note || 'temporary web api migration import',
    },
  );
  ensureProcedureOk(authorizeResult);
  console.log(`[spacetime:migration:import] 已授权临时 Web API identity`);

  return {
    ...options,
    token: identity.token,
    temporaryWebIdentity: identity.identity,
    useHttp: true,
  };
}

async function importMigrationJsonDirect(options, migrationJson) {
  const includeTables = resolveImportIncludeTables(options, migrationJson);
  const procedureName =
    options.incremental === true
      ? 'import_database_migration_incremental_from_file'
      : 'import_database_migration_from_file';
  const input = {
    migration_json: migrationJson,
    include_tables: includeTables,
    replace_existing: options.replaceExisting === true,
    dry_run: options.dryRun === true,
  };
  if (options.replaceExisting === true) {
    console.log(
      `[spacetime:migration:import] replace-existing 仅覆盖本次文件内的表: ${includeTables.join(', ') || '无'}`,
    );
  } else if (options.incremental === true) {
    console.log(`[spacetime:migration:import] 使用增量模式，已存在或冲突的行会跳过`);
  }
  return callSpacetimeProcedure(options, procedureName, input);
}

function resolveImportIncludeTables(options, migrationJson) {
  if (options.replaceExisting !== true) {
    return options.includeTables;
  }

  const migrationTables = readMigrationTableNames(migrationJson);
  if (options.includeTables.length === 0) {
    return migrationTables;
  }

  const requestedTables = new Set(options.includeTables);
  return migrationTables.filter((tableName) => requestedTables.has(tableName));
}

function readMigrationTableNames(migrationJson) {
  let payload;
  try {
    payload = JSON.parse(migrationJson);
  } catch (error) {
    throw new Error(
      `迁移文件 JSON 解析失败: ${error instanceof Error ? error.message : String(error)}`,
    );
  }

  if (!payload || !Array.isArray(payload.tables)) {
    throw new Error('迁移文件缺少 tables 数组。');
  }

  const tableNames = [];
  const seen = new Set();
  for (const table of payload.tables) {
    if (!table || typeof table.name !== 'string' || !table.name.trim()) {
      throw new Error('迁移文件 tables 内存在缺少 name 的表项。');
    }
    const tableName = table.name.trim();
    if (!seen.has(tableName)) {
      tableNames.push(tableName);
      seen.add(tableName);
    }
  }

  return tableNames;
}

async function revokeTemporaryWebIdentity(options) {
  if (!options.temporaryWebIdentity) {
    return;
  }

  try {
    const revokeResult = await callSpacetimeProcedure(
      options,
      'revoke_database_migration_operator',
      { operator_identity_hex: options.temporaryWebIdentity },
    );
    ensureProcedureOk(revokeResult);
    console.log(`[spacetime:migration:import] 已撤销临时 Web API identity`);
  } catch (error) {
    console.warn(
      `[spacetime:migration:import] 撤销临时 Web API identity 失败: ${
        error instanceof Error ? error.message : String(error)
      }`,
    );
  }
}

function printTableStats(tableStats) {
  if (!Array.isArray(tableStats) || tableStats.length === 0) {
    return;
  }

  const rows = tableStats.map((stat) => ({
    table: stat.table_name,
    imported: stat.imported_row_count,
    skipped: stat.skipped_row_count,
  }));
  console.table(rows);
}

function printMigrationWarnings(warnings) {
  if (!Array.isArray(warnings) || warnings.length === 0) {
    return;
  }

  console.warn('[spacetime:migration:import] 迁移告警汇总:');
  console.table(
    warnings.map((warning) => ({
      table: warning.table_name,
      kind: warning.warning_kind,
      message: warning.message,
    })),
  );
}