import { getFrontendStore } from "./store/frontend"
import { getAutomationStore } from "./store/automation"
import { getThemeStore } from "./store/theme"
import { derived } from "svelte/store"
import { findComponent, findComponentPath } from "./componentUtils"
import { RoleUtils } from "@budibase/frontend-core"

export const store = getFrontendStore()
export const automationStore = getAutomationStore()
export const themeStore = getThemeStore()

export const selectedScreen = derived(store, $store => {
  return $store.screens.find(screen => screen._id === $store.selectedScreenId)
})

export const selectedLayout = derived(store, $store => {
  return $store.layouts?.find(layout => layout._id === $store.selectedLayoutId)
})

export const selectedComponent = derived(
  [store, selectedScreen],
  ([$store, $selectedScreen]) => {
    if (!$selectedScreen || !$store.selectedComponentId) {
      return null
    }
    return findComponent($selectedScreen?.props, $store.selectedComponentId)
  }
)

// For legacy compatibility only, but with the new design UI this is just
// the selected screen
export const currentAsset = selectedScreen

export const sortedScreens = derived(store, $store => {
  return $store.screens.slice().sort((a, b) => {
    // Sort by role first
    const roleA = RoleUtils.getRolePriority(a.routing.roleId)
    const roleB = RoleUtils.getRolePriority(b.routing.roleId)
    if (roleA !== roleB) {
      return roleA > roleB ? -1 : 1
    }
    // Then put home screens first
    const homeA = !!a.routing.homeScreen
    const homeB = !!b.routing.homeScreen
    if (homeA !== homeB) {
      return homeA ? -1 : 1
    }
    // Then sort alphabetically by each URL param
    const aParams = a.routing.route.split("/")
    const bParams = b.routing.route.split("/")
    let minParams = Math.min(aParams.length, bParams.length)
    for (let i = 0; i < minParams; i++) {
      if (aParams[i] === bParams[i]) {
        continue
      }
      return aParams[i] < bParams[i] ? -1 : 1
    }
    // Then sort by the fewest amount of URL params
    return aParams.length < bParams.length ? -1 : 1
  })
})

export const selectedComponentPath = derived(
  [store, selectedScreen],
  ([$store, $selectedScreen]) => {
    return findComponentPath(
      $selectedScreen?.props,
      $store.selectedComponentId
    ).map(component => component._id)
  }
)