import { apiRequest } from '../lib/api'
import { getActiveBusinessId } from '../lib/businessContext'
import type {
  CreateInvoiceItemTemplatePayload,
  CreateInvoicePayload,
  CreateInvoiceTemplatePayload,
  Invoice,
  InvoiceItemTemplate,
  InvoiceItemTemplatesResponse,
  InvoiceStatus,
  InvoiceTemplate,
  InvoiceTemplatesListResponse,
  InvoicesListResponse,
  UpdateInvoiceItemTemplatePayload,
  UpdateInvoicePayload,
  UpdateInvoiceTemplatePayload,
} from '../types/invoice'

function businessPath(suffix = '') {
  const businessId = getActiveBusinessId()
  if (!businessId) {
    throw new Error('No active business selected. Please sign in again.')
  }
  return `/businesses/${businessId}${suffix}`
}

export function listInvoiceItemTemplates(signal?: AbortSignal) {
  return apiRequest<InvoiceItemTemplatesResponse>(businessPath('/invoice-item-templates'), {
    auth: true,
    signal,
  })
}

export function createInvoiceItemTemplate(payload: CreateInvoiceItemTemplatePayload) {
  return apiRequest<InvoiceItemTemplate>(businessPath('/invoice-item-templates'), {
    method: 'POST',
    auth: true,
    body: payload,
  })
}

export function updateInvoiceItemTemplate(
  templateId: string,
  payload: UpdateInvoiceItemTemplatePayload,
) {
  return apiRequest<InvoiceItemTemplate>(
    businessPath(`/invoice-item-templates/${templateId}`),
    {
      method: 'PATCH',
      auth: true,
      body: payload,
    },
  )
}

export function deleteInvoiceItemTemplate(templateId: string) {
  return apiRequest<{ ok: boolean }>(businessPath(`/invoice-item-templates/${templateId}`), {
    method: 'DELETE',
    auth: true,
  })
}

export function listInvoiceTemplates(signal?: AbortSignal) {
  return apiRequest<InvoiceTemplatesListResponse>(businessPath('/invoice-templates'), {
    auth: true,
    signal,
  })
}

export function getInvoiceTemplate(templateId: string, signal?: AbortSignal) {
  return apiRequest<InvoiceTemplate>(businessPath(`/invoice-templates/${templateId}`), {
    auth: true,
    signal,
  })
}

export function createInvoiceTemplate(payload: CreateInvoiceTemplatePayload) {
  return apiRequest<InvoiceTemplate>(businessPath('/invoice-templates'), {
    method: 'POST',
    auth: true,
    body: payload,
  })
}

export function updateInvoiceTemplate(templateId: string, payload: UpdateInvoiceTemplatePayload) {
  return apiRequest<InvoiceTemplate>(businessPath(`/invoice-templates/${templateId}`), {
    method: 'PATCH',
    auth: true,
    body: payload,
  })
}

export function deleteInvoiceTemplate(templateId: string) {
  return apiRequest<{ ok: boolean }>(businessPath(`/invoice-templates/${templateId}`), {
    method: 'DELETE',
    auth: true,
  })
}

export interface ListInvoicesParams {
  page?: number
  pageSize?: number
  status?: InvoiceStatus
  userId?: string
}

export function listInvoices(params: ListInvoicesParams = {}, signal?: AbortSignal) {
  const search = new URLSearchParams()
  if (params.page) search.set('page', String(params.page))
  if (params.pageSize) search.set('pageSize', String(params.pageSize))
  if (params.status) search.set('status', params.status)
  if (params.userId) search.set('userId', params.userId)
  const qs = search.toString()
  return apiRequest<InvoicesListResponse>(businessPath(`/invoices${qs ? `?${qs}` : ''}`), {
    auth: true,
    signal,
  })
}

export function getInvoice(invoiceId: string, signal?: AbortSignal) {
  return apiRequest<Invoice>(businessPath(`/invoices/${invoiceId}`), {
    auth: true,
    signal,
  })
}

export function createInvoice(payload: CreateInvoicePayload) {
  return apiRequest<Invoice>(businessPath('/invoices'), {
    method: 'POST',
    auth: true,
    body: payload,
  })
}

export function updateInvoice(invoiceId: string, payload: UpdateInvoicePayload) {
  return apiRequest<Invoice>(businessPath(`/invoices/${invoiceId}`), {
    method: 'PUT',
    auth: true,
    body: payload,
  })
}

export function updateInvoiceStatus(
  invoiceId: string,
  payload: { status: InvoiceStatus; notes?: string },
) {
  return apiRequest<Invoice>(businessPath(`/invoices/${invoiceId}`), {
    method: 'PATCH',
    auth: true,
    body: payload,
  })
}

export function deleteInvoice(invoiceId: string) {
  return apiRequest<{ ok: boolean }>(businessPath(`/invoices/${invoiceId}`), {
    method: 'DELETE',
    auth: true,
  })
}