"use client"

import * as React from "react"
import Link from "next/link"
import { useRouter } from "next/navigation"
import {
  IconBuilding,
  IconCheck,
  IconSelector,
  IconUser,
} from "@tabler/icons-react"

import {
  getUserOrganizations,
  switchOrganization,
} from "@/app/actions/organizations"
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"
import {
  SidebarMenu,
  SidebarMenuButton,
  SidebarMenuItem,
  useSidebar,
} from "@/components/ui/sidebar"
import { cn } from "@/lib/utils"

type OrgInfo = {
  readonly id: string
  readonly name: string
  readonly slug: string
  readonly type: string
  readonly role: string
}

export function OrgSwitcher({
  activeOrgId,
  activeOrgName,
}: {
  readonly activeOrgId: string | null
  readonly activeOrgName: string | null
}): React.ReactElement {
  const router = useRouter()
  const { isMobile } = useSidebar()
  const [orgs, setOrgs] = React.useState<readonly OrgInfo[]>([])
  const [isLoading, setIsLoading] = React.useState(false)

  React.useEffect(() => {
    async function loadOrgs(): Promise<void> {
      const result = await getUserOrganizations()
      setOrgs(result)
    }
    void loadOrgs()
  }, [])

  async function handleOrgSwitch(orgId: string): Promise<void> {
    if (orgId === activeOrgId) return

    setIsLoading(true)
    const result = await switchOrganization(orgId)

    if (result.success) {
      router.refresh()
    } else {
      console.error("Failed to switch organization:", result.error)
      setIsLoading(false)
    }
  }

  const displayName = activeOrgName ?? "Compass"
  const hasOrgs = orgs.length > 1

  return (
    <SidebarMenu>
      <SidebarMenuItem>
        <SidebarMenuButton
          size="lg"
          className="gap-0 px-0 hover:bg-transparent active:bg-transparent"
          asChild={false}
        >
          <Link
            href="/dashboard"
            className="flex shrink-0 items-center justify-center size-8 rounded-md hover:bg-sidebar-accent transition-colors"
            aria-label="Compass home"
          >
            <span
              className="!size-5 block bg-current"
              style={{
                maskImage: "url(/logo-black.png)",
                maskSize: "contain",
                maskRepeat: "no-repeat",
                WebkitMaskImage: "url(/logo-black.png)",
                WebkitMaskSize: "contain",
                WebkitMaskRepeat: "no-repeat",
              }}
            />
          </Link>
          <DropdownMenu>
            <DropdownMenuTrigger asChild disabled={!hasOrgs}>
              <button
                className={cn(
                  "flex min-w-0 flex-1 items-center gap-1 rounded-md px-2 py-1 text-left",
                  "hover:bg-sidebar-accent transition-colors",
                  "data-[state=open]:bg-sidebar-accent",
                  "data-[state=open]:text-sidebar-accent-foreground",
                  !hasOrgs && "cursor-default hover:bg-transparent",
                )}
              >
                <span className="truncate text-sm font-semibold">
                  {displayName}
                </span>
                {hasOrgs && (
                  <IconSelector
                    className="size-4 shrink-0 opacity-50"
                  />
                )}
              </button>
            </DropdownMenuTrigger>
            <DropdownMenuContent
              className="w-(--radix-dropdown-menu-trigger-width) min-w-56 rounded-lg"
              side={isMobile ? "bottom" : "right"}
              align="start"
              sideOffset={4}
            >
              {orgs.map((org, i) => {
                const isActive = org.id === activeOrgId
                const OrgIcon =
                  org.type === "personal" ? IconUser : IconBuilding

                return (
                  <React.Fragment key={org.id}>
                    {i > 0 && <DropdownMenuSeparator />}
                    <DropdownMenuItem
                      onClick={() => void handleOrgSwitch(org.id)}
                      disabled={isLoading}
                      className="gap-2 px-2 py-1.5"
                    >
                      <OrgIcon className="size-4 shrink-0 opacity-60" />
                      <span className="truncate font-medium">
                        {org.name}
                      </span>
                      {isActive && (
                        <IconCheck
                          className="ml-auto size-4 shrink-0 text-primary"
                        />
                      )}
                    </DropdownMenuItem>
                  </React.Fragment>
                )
              })}
            </DropdownMenuContent>
          </DropdownMenu>
        </SidebarMenuButton>
      </SidebarMenuItem>
    </SidebarMenu>
  )
}