import type { HttpContext } from '@adonisjs/core/http'
import { existsSync, rmSync } from 'node:fs'
import Computer from '#models/computer'
import ComputerState from '#models/computer_state'
import Component from '#models/component'
import { storeComputerValidator } from '#validators/Computers/store'
import { handleComponents } from '#services/component_service'
import { handlePictures } from '#services/picture_service'
import type { Image } from '#types/UItypes'
import { updateComputerValidator } from '#validators/Computers/update'

/**
 * Lucid's `serialize()` returns a loosely typed `ModelObject`
 * (`{ [key: string]: any }`). It is not structurally assignable to the
 * concrete prop shapes declared by the Vue pages (see
 * `inertia/pages/types/UITypes.ts`), which live in a separate TypeScript
 * project (the `inertia/**` tree is excluded from the backend tsconfig).
 * Since the controller fully controls which columns/relations are
 * preloaded and serialized, this cast documents that the runtime shape
 * matches what the page expects at this boundary.
 */
function asPageProp<T>(value: unknown): T {
  return value as T
}

export default class ComputersController {
  async index({ auth, inertia }: HttpContext) {
    const user = await auth.authenticate()
    const computers = await Computer.query()
      .where('user_id', user.id)
      .preload('state')
      .preload('components')
      .preload('pictures', (picturesQuery) => {
        picturesQuery.where('order', 1)
      })

    return inertia.render('computers/index', {
      computers: asPageProp(computers.map((c) => c.serialize())),
    })
  }

  async create({ auth, inertia }: HttpContext) {
    const user = await auth.authenticate()
    const states = await ComputerState.all()
    const components = await Component.query()
      .where('userId', user.id)
      .whereNull('computerId')
      .preload('type')
    return inertia.render('computers/create', {
      components: asPageProp(components.map((c) => c.serialize())),
      states: asPageProp(states.map((s) => s.serialize())),
    })
  }

  async store({ auth, request, response }: HttpContext) {
    const user = await auth.authenticate()
    const { pictures, componentsId, ...computerData } =
      await request.validateUsing(storeComputerValidator)
    await ComputerState.findOrFail(computerData.stateId)
    const computer = await Computer.create({
      ...computerData,
      userId: user.id,
    })
    await handleComponents(componentsId as number[], computer, user.id)
    await handlePictures(pictures as Image[], request, computer)
    return response.redirect('/computers')
  }

  async show({ auth, inertia, params }: HttpContext) {
    const user = await auth.authenticate()
    const computerId = params.id
    const computer = await Computer.query()
      .preload('state')
      .preload('components', (componentsQuery) => {
        componentsQuery.preload('type')
      })
      .preload('pictures', (picturesQuery) => {
        picturesQuery.orderBy('order')
      })
      .where('user_id', user.id)
      .andWhere('id', computerId)
      .firstOrFail()
    return inertia.render('computers/show', {
      computer: asPageProp({ ...computer.serialize(), shareToken: computer.shareToken }),
    })
  }

  async edit({ params, inertia, auth }: HttpContext) {
    const user = await auth.authenticate()
    const states = await ComputerState.all()
    const computerId = params.id

    const computer = await Computer.query()
      .preload('state')
      .preload('components', (componentsQuery) => {
        componentsQuery.preload('type')
      })
      .preload('pictures')
      .where('user_id', user.id)
      .andWhere('id', computerId)
      .firstOrFail()

    const availableComponents = await Component.query()
      .preload('type')
      .where('user_id', user.id)
      .whereNull('computer_id')
      .whereNotIn(
        'id',
        computer.components.map((c) => c.id)
      )
    return inertia.render('computers/edit', {
      computer: asPageProp(computer.serialize()),
      availableComponents: asPageProp(availableComponents.map((c) => c.serialize())),
      states: asPageProp(states.map((s) => s.serialize())),
    })
  }

  async update({ auth, params, request, response }: HttpContext) {
    const user = await auth.authenticate()
    const computerId = params.id
    const { pictures, componentsId, ...computerData } = await request.validateUsing(
      updateComputerValidator
    )
    const computer = await Computer.query()
      .where('user_id', user.id)
      .andWhere('id', computerId)
      .firstOrFail()
    computer.merge(computerData)
    await computer.save()
    await handleComponents(componentsId as number[], computer, user.id)
    await handlePictures(pictures as Image[], request, computer)
    return response.redirect(`/computers/${computer.id}`)
  }

  async destroy({ auth, params, response }: HttpContext) {
    const user = await auth.authenticate()
    const computerId = params.id
    const computer = await Computer.query()
      .where('user_id', user.id)
      .andWhere('id', computerId)
      .firstOrFail()

    const uploadsDir = `uploads/computer_${computer.id}`
    await computer.related('components').query().update({ computerId: null })
    if (existsSync(uploadsDir)) {
      rmSync(uploadsDir, { recursive: true, force: true })
    }
    await computer.delete()
    return response.redirect('/computers')
  }
}