"use client"

import type { AssetResponse } from "@/lib/types"
import {
  Collapsible,
  CollapsibleContent,
  CollapsibleTrigger,
} from "@/components/ui/collapsible"
import { Badge } from "@/components/ui/badge"
import { Separator } from "@/components/ui/separator"
import { ScrollArea } from "@/components/ui/scroll-area"
import { Button } from "@/components/ui/button"
import { ChevronDownIcon, XIcon } from "lucide-react"

interface MetadataSidebarProps {
  asset: AssetResponse
  onClose: () => void
}

const CAMERA_KEYS = [
  "Make",
  "Model",
  "FocalLength",
  "FocalLengthIn35mmFilm",
  "FNumber",
  "ExposureTime",
  "ISOSpeedRatings",
  "ExposureMode",
  "ExposureProgram",
  "MeteringMode",
  "Flash",
  "WhiteBalanceMode",
  "LightSource",
]

const GPS_KEYS = ["GPSInfo", "GPSLatitude", "GPSLongitude", "GPSAltitude"]

const HIDDEN_KEYS = [
  "file_size_bytes",
  "mime_type",
  "ExifImageWidth",
  "ExifImageHeight",
  ...CAMERA_KEYS,
  ...GPS_KEYS,
]

function formatBytes(bytes: number): string {
  if (bytes < 1024) return `${bytes} B`
  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`
  return `${(bytes / (1024 * 1024)).toFixed(1)} MB`
}

function formatExposure(val: string): string {
  const match = val.match(/^(\d+)\/(\d+)/)
  if (!match) return val
  const num = parseInt(match[1])
  const den = parseInt(match[2])
  if (den === 0) return val
  const result = num / den
  return result < 1 ? `1/${Math.round(1 / result)}s` : `${result}s`
}

function formatFocalLength(val: string): string {
  const match = val.match(/^(\d+)\/(\d+)/)
  if (!match) return val
  return `${Math.round(parseInt(match[1]) / parseInt(match[2]))}mm`
}

function formatFNumber(val: string): string {
  const match = val.match(/^(\d+)\/(\d+)/)
  if (!match) return val
  return `f/${(parseInt(match[1]) / parseInt(match[2])).toFixed(1)}`
}

function MetaRow({ label, value }: { label: string; value: string }) {
  return (
    <div className="flex justify-between gap-4 py-0.5 text-xs">
      <span className="shrink-0 text-zinc-400">{label}</span>
      <span className="truncate text-right text-zinc-200">{value}</span>
    </div>
  )
}

function Section({
  title,
  defaultOpen = true,
  children,
}: {
  title: string
  defaultOpen?: boolean
  children: React.ReactNode
}) {
  return (
    <Collapsible defaultOpen={defaultOpen}>
      <CollapsibleTrigger className="flex w-full items-center justify-between py-2 text-xs font-medium text-zinc-300 hover:text-white">
        {title}
        <ChevronDownIcon className="h-3.5 w-3.5 transition-transform [[data-state=closed]>&]:rotate-(-90)" />
      </CollapsibleTrigger>
      <CollapsibleContent>
        <div className="pb-3">{children}</div>
      </CollapsibleContent>
    </Collapsible>
  )
}

export function MetadataSidebar({ asset, onClose }: MetadataSidebarProps) {
  const meta = asset.metadata
  const width = meta.ExifImageWidth as string | undefined
  const height = meta.ExifImageHeight as string | undefined

  const cameraEntries = CAMERA_KEYS.filter((k) => meta[k] != null).map(
    (k) => {
      let val = String(meta[k])
      if (k === "ExposureTime") val = formatExposure(val)
      if (k === "FocalLength") val = formatFocalLength(val)
      if (k === "FNumber") val = formatFNumber(val)
      return [k, val] as const
    },
  )

  const gpsEntries = GPS_KEYS.filter((k) => meta[k] != null)

  const remainingEntries = Object.entries(meta).filter(
    ([k]) => !HIDDEN_KEYS.includes(k),
  )

  return (
    <div className="flex w-80 shrink-0 flex-col border-l border-zinc-800 bg-zinc-950/90 backdrop-blur">
      <div className="flex items-center justify-between px-4 py-3">
        <span className="text-sm font-medium text-zinc-200">Details</span>
        <Button
          variant="ghost"
          size="icon"
          className="h-7 w-7 text-zinc-400 hover:text-white hover:bg-white/10"
          onClick={onClose}
        >
          <XIcon className="h-4 w-4" />
        </Button>
      </div>

      <Separator className="bg-zinc-800" />

      <ScrollArea className="flex-1 px-4">
        {/* File Info */}
        <Section title="File Info">
          <div className="flex items-center gap-2 pb-1">
            <Badge variant="secondary" className="text-xs">
              {asset.asset_type}
            </Badge>
            <span className="text-xs text-zinc-400">{asset.mime_type}</span>
          </div>
          <MetaRow label="Size" value={formatBytes(asset.file_size)} />
          {width && height && (
            <MetaRow label="Dimensions" value={`${width} × ${height}`} />
          )}
          <MetaRow
            label="Created"
            value={new Date(asset.created_at).toLocaleString()}
          />
          <MetaRow
            label="Processed"
            value={asset.is_processed ? "Yes" : "No"}
          />
        </Section>

        {/* Camera */}
        {cameraEntries.length > 0 && (
          <>
            <Separator className="bg-zinc-800" />
            <Section title="Camera">
              {cameraEntries.map(([k, v]) => (
                <MetaRow key={k} label={k} value={v} />
              ))}
            </Section>
          </>
        )}

        {/* Location */}
        {gpsEntries.length > 0 && (
          <>
            <Separator className="bg-zinc-800" />
            <Section title="Location">
              {gpsEntries.map((k) => (
                <MetaRow key={k} label={k} value={String(meta[k])} />
              ))}
            </Section>
          </>
        )}

        {/* All Metadata */}
        {remainingEntries.length > 0 && (
          <>
            <Separator className="bg-zinc-800" />
            <Section title="All Metadata" defaultOpen={false}>
              {remainingEntries.map(([k, v]) => (
                <MetaRow key={k} label={k} value={String(v)} />
              ))}
            </Section>
          </>
        )}
      </ScrollArea>
    </div>
  )
}