import { createHandler } from './_shared/middleware'
import { update as adminUpdate, list as adminList } from './admin-data'

function adminDataList(ctx: any, entity: string, filters: Record<string, any>) {
  return adminList({ ...ctx, query: { ...(ctx.query || {}), entity, ...filters } } as any, {})
}

function adminDataUpdate(ctx: any, entity: string, id: string, fields: Record<string, any>) {
  return adminUpdate({ ...ctx, query: { ...(ctx.query || {}), entity, id } } as any, fields)
}

export const handler = createHandler(async (ctx, body) => {
  const { item_id, action } = (body || {}) as { item_id?: string; action?: 'request' | 'approve' | 'reject' }
  if (!item_id) {
    const e: any = new Error('item_id is required')
    e.statusCode = 400
    throw e
  }
  if (!action || !['request', 'approve', 'reject'].includes(action)) {
    const e: any = new Error("action must be 'request', 'approve', or 'reject'")
    e.statusCode = 400
    throw e
  }

  const itemResult = await adminDataList(ctx, 'items', { id: item_id, limit: '1' })
  const item = Array.isArray(itemResult) ? itemResult[0] : (itemResult as any)?.data?.[0]
  if (!item) {
    const e: any = new Error('Work item not found')
    e.statusCode = 404
    throw e
  }

  const principalId = ctx.principal?.id
  const currentData = item.data || {}
  const now = new Date().toISOString()

  let approvalStatus = currentData.production_approval_status || 'pending'
  let approverId = currentData.approver_id || null
  let approvedAt = currentData.approved_at || null

  if (action === 'request') {
    approvalStatus = 'requested'
  } else if (action === 'approve') {
    approvalStatus = 'approved'
    approverId = principalId
    approvedAt = now
  } else if (action === 'reject') {
    approvalStatus = 'rejected'
    approverId = principalId
    approvedAt = now
  }

  const updated = await adminDataUpdate(ctx, 'items', item_id, {
    data: {
      ...currentData,
      production_approval_status: approvalStatus,
      approver_id: approverId,
      approved_at: approvedAt,
    },
  })

  return { ok: true, action, approval_status: approvalStatus, item: updated }
})