import { generateTemplates } from '../../shared/templates'
import { closeModal, openModal, rerenderModal } from '../components/modal'
import { apps, setSelectedApp } from '../state'
import { Button, Form, FormActions, FormError, FormField, FormInput, FormLabel } from '../styles'

let newAppError = ''
let newAppCreating = false

async function createNewApp(input: HTMLInputElement) {
  const name = input.value.trim().toLowerCase().replace(/\s+/g, '-')

  if (!name) {
    newAppError = 'App name is required'
    rerenderModal()
    return
  }

  if (!/^[a-z][a-z0-9-]*$/.test(name)) {
    newAppError = 'Name must start with a letter and contain only lowercase letters, numbers, and hyphens'
    rerenderModal()
    return
  }

  if (apps.some(a => a.name === name)) {
    newAppError = 'An app with this name already exists'
    rerenderModal()
    return
  }

  newAppCreating = true
  newAppError = ''
  rerenderModal()

  try {
    const templates = generateTemplates(name)

    for (const [filename, content] of Object.entries(templates)) {
      const res = await fetch(`/api/sync/apps/${name}/files/${filename}`, {
        method: 'PUT',
        body: content,
      })
      if (!res.ok) {
        throw new Error(`Failed to create ${filename}`)
      }
    }

    // Success - close modal and select the new app
    setSelectedApp(name)
    closeModal()
  } catch (err) {
    newAppError = err instanceof Error ? err.message : 'Failed to create app'
    newAppCreating = false
    rerenderModal()
  }
}

export function openNewAppModal() {
  newAppError = ''
  newAppCreating = false

  openModal('New App', () => (
    <Form onSubmit={(e: Event) => {
      e.preventDefault()
      const input = (e.target as HTMLFormElement).querySelector('input') as HTMLInputElement
      createNewApp(input)
    }}>
      <FormField>
        <FormLabel for="app-name">App Name</FormLabel>
        <FormInput
          id="app-name"
          type="text"
          placeholder="my-app"
          autofocus
        />
        {newAppError && <FormError>{newAppError}</FormError>}
      </FormField>
      <FormActions>
        <Button type="button" onClick={closeModal} disabled={newAppCreating}>
          Cancel
        </Button>
        <Button type="submit" variant="primary" disabled={newAppCreating}>
          {newAppCreating ? 'Creating...' : 'Create App'}
        </Button>
      </FormActions>
    </Form>
  ))
}