/**
 * 上游报表库探查 · 花名册与组织架构相关表
 *
 * 纯只读：只查 INFORMATION_SCHEMA 与少量样本行，不写入、不建表、不改结构。
 *
 * 凭据一律从环境变量读取，脚本内不含任何账号密码。
 *
 * 用法（凭据在命令行传入，不落盘）：
 *   REPORT_DB_SERVER=... REPORT_DB_DATABASE=... REPORT_DB_USER=... REPORT_DB_PASSWORD=... \
 *     npx tsx scripts/probe-report-db.ts
 */

import mssql from 'mssql'

const required = ['REPORT_DB_SERVER', 'REPORT_DB_DATABASE', 'REPORT_DB_USER', 'REPORT_DB_PASSWORD']
const missing = required.filter((k) => !process.env[k])
if (missing.length > 0) {
  console.error('缺少环境变量：' + missing.join(', '))
  process.exit(1)
}

const config: mssql.config = {
  server: process.env.REPORT_DB_SERVER as string,
  database: process.env.REPORT_DB_DATABASE as string,
  user: process.env.REPORT_DB_USER as string,
  password: process.env.REPORT_DB_PASSWORD as string,
  port: Number(process.env.REPORT_DB_PORT || 1433),
  options: {
    encrypt: process.env.REPORT_DB_ENCRYPT === 'true',
    trustServerCertificate: process.env.REPORT_DB_TRUST_SERVER_CERTIFICATE !== 'false',
  },
  connectionTimeout: 20000,
  requestTimeout: 60000,
  pool: { max: 2, min: 0, idleTimeoutMillis: 10000 },
}

async function main() {
  const pool = await mssql.connect(config)
  try {
    console.log('已连接：' + config.server + ' / ' + config.database)

    // 一、rpt schema 下与人事、组织相关的表
    const tables = await pool.request().query(`
      SELECT TABLE_SCHEMA, TABLE_NAME
      FROM INFORMATION_SCHEMA.TABLES
      WHERE TABLE_SCHEMA = 'rpt'
        AND (
          TABLE_NAME LIKE '%hr[_]%' OR TABLE_NAME LIKE '%employee%' OR
          TABLE_NAME LIKE '%flower%' OR TABLE_NAME LIKE '%group%'  OR
          TABLE_NAME LIKE '%dept%'  OR TABLE_NAME LIKE '%staff%'   OR
          TABLE_NAME LIKE '%org%'   OR TABLE_NAME LIKE '%user%'
        )
      ORDER BY TABLE_NAME
    `)
    console.log('\n===== 一、人事/组织相关表（rpt schema）=====')
    tables.recordset.forEach((r: any) => console.log('  ' + r.TABLE_SCHEMA + '.' + r.TABLE_NAME))
    console.log('  共 ' + tables.recordset.length + ' 张')

    // 二、rpt schema 表总数，用于判断整体规模
    const total = await pool.request().query(`
      SELECT COUNT(*) AS c FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'rpt'
    `)
    console.log('\n  （rpt schema 共有 ' + total.recordset[0].c + ' 张表）')

    // 三、重点表的列结构
    const focus = [
      'hr_groups',
      'hr_employee_dimission',
      'hr_flowerName_book',
      'op_OperationGroup_Reflect',
    ]
    for (const t of focus) {
      const cols = await pool.request().input('t', t).query(`
        SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH AS LEN, IS_NULLABLE
        FROM INFORMATION_SCHEMA.COLUMNS
        WHERE TABLE_SCHEMA = 'rpt' AND TABLE_NAME = @t
        ORDER BY ORDINAL_POSITION
      `)
      console.log('\n===== rpt.' + t + ' =====')
      if (cols.recordset.length === 0) {
        console.log('  ⚠️ 表不存在')
        continue
      }
      const cnt = await pool.request().query('SELECT COUNT(*) AS c FROM rpt.' + t)
      console.log('  行数：' + cnt.recordset[0].c)
      cols.recordset.forEach((c: any) => {
        const len = c.LEN ? '(' + (c.LEN === -1 ? 'max' : c.LEN) + ')' : ''
        console.log('    ' + String(c.COLUMN_NAME).padEnd(28) + (c.DATA_TYPE + len).padEnd(18) + (c.IS_NULLABLE === 'YES' ? 'NULL' : 'NOT NULL'))
      })
    }

    // 四、组织树的根节点与层级结构
    console.log('\n===== 组织树结构分析（hr_groups）=====')
    const rootStats = await pool.request().query(`
      SELECT
        SUM(CASE WHEN parent_id IS NULL THEN 1 ELSE 0 END) AS null_parent,
        SUM(CASE WHEN parent_id = 0 THEN 1 ELSE 0 END)     AS zero_parent,
        SUM(CASE WHEN parent_id = Id THEN 1 ELSE 0 END)    AS self_parent,
        COUNT(*) AS total
      FROM rpt.hr_groups
    `)
    const rs = rootStats.recordset[0]
    console.log('  部门总数           ' + rs.total)
    console.log('  parent_id 为 NULL  ' + rs.null_parent)
    console.log('  parent_id 为 0     ' + rs.zero_parent)
    console.log('  parent_id 指向自己  ' + rs.self_parent)

    const roots = await pool.request().query(`
      SELECT TOP 10 Id, name, parent_id FROM rpt.hr_groups
      WHERE parent_id IS NULL OR parent_id = 0 OR parent_id = Id
      ORDER BY Id
    `)
    console.log('\n  根节点样本：')
    roots.recordset.forEach((r: any) =>
      console.log('    Id=' + String(r.Id).padEnd(12) + 'parent=' + String(r.parent_id ?? 'NULL').padEnd(10) + r.name)
    )

    // 孤儿节点：父部门在表中不存在
    const orphans = await pool.request().query(`
      SELECT COUNT(*) AS c FROM rpt.hr_groups g
      WHERE g.parent_id IS NOT NULL AND g.parent_id <> 0 AND g.parent_id <> g.Id
        AND NOT EXISTS (SELECT 1 FROM rpt.hr_groups p WHERE p.Id = g.parent_id)
    `)
    console.log('\n  孤儿节点（父部门不存在）  ' + orphans.recordset[0].c)

    // 五、在职状态口径
    console.log('\n===== 在职状态口径 =====')
    const active = await pool.request().query(`
      SELECT active, COUNT(*) AS c FROM rpt.hr_employee GROUP BY active
    `)
    active.recordset.forEach((r: any) =>
      console.log('  hr_employee.active = ' + String(r.active) + '  →  ' + r.c + ' 人')
    )
    const status = await pool.request().query(`
      SELECT [sys01-employeeStatus] AS s, COUNT(*) AS c
      FROM rpt.hr_employee_register GROUP BY [sys01-employeeStatus] ORDER BY c DESC
    `)
    console.log('')
    status.recordset.forEach((r: any) =>
      console.log('  employeeStatus = ' + String(r.s ?? '(空)').padEnd(12) + '→  ' + r.c + ' 人')
    )
  } finally {
    await pool.close()
  }
}

main().catch((e) => {
  console.error('探查失败：', e instanceof Error ? e.message : e)
  process.exitCode = 1
})