'use client'

import { useEffect, useMemo, useState } from 'react'
import Link from 'next/link'
import { Card } from '@/libs/frontend-ui-primitives'
import { configApi, type TokenListResponse } from '@/services/api/config'
import {
  aggregateLiquidityPools,
  getRouteBackedPoolAddresses,
  selectFeaturedLiquidityTokens,
} from '@/services/api/liquidity'
import { routesApi, type MissionControlLiquidityPool, type RouteMatrixResponse } from '@/services/api/routes'
import { formatCurrency, formatNumber, truncateMiddle } from './OperationsPageShell'

interface TokenPoolRecord {
  symbol: string
  pools: MissionControlLiquidityPool[]
}

export default function PoolsOperationsPage() {
  const [tokenList, setTokenList] = useState<TokenListResponse | null>(null)
  const [routeMatrix, setRouteMatrix] = useState<RouteMatrixResponse | null>(null)
  const [tokenPoolRecords, setTokenPoolRecords] = useState<TokenPoolRecord[]>([])
  const [loadingError, setLoadingError] = useState<string | null>(null)

  useEffect(() => {
    let cancelled = false

    const load = async () => {
      const [tokenListResult, routeMatrixResult] = await Promise.allSettled([
        configApi.getTokenList(),
        routesApi.getRouteMatrix(),
      ])

      if (cancelled) return

      if (tokenListResult.status === 'fulfilled') setTokenList(tokenListResult.value)
      if (routeMatrixResult.status === 'fulfilled') setRouteMatrix(routeMatrixResult.value)

      if (tokenListResult.status === 'fulfilled') {
        const featuredTokens = selectFeaturedLiquidityTokens(tokenListResult.value.tokens || [])
        const poolResults = await Promise.allSettled(
          featuredTokens.map(async (token) => ({
            symbol: token.symbol,
            pools: (await routesApi.getTokenPools(token.address)).pools || [],
          }))
        )

        if (!cancelled) {
          setTokenPoolRecords(
            poolResults
              .filter((result): result is PromiseFulfilledResult<TokenPoolRecord> => result.status === 'fulfilled')
              .map((result) => result.value)
          )
        }
      }

      if (tokenListResult.status === 'rejected' && routeMatrixResult.status === 'rejected') {
        setLoadingError('Live pool inventory is temporarily unavailable from the public explorer APIs.')
      }
    }

    load().catch((error) => {
      if (!cancelled) {
        setLoadingError(
          error instanceof Error ? error.message : 'Live pool inventory is temporarily unavailable from the public explorer APIs.'
        )
      }
    })

    return () => {
      cancelled = true
    }
  }, [])

  const featuredTokens = useMemo(
    () => selectFeaturedLiquidityTokens(tokenList?.tokens || []),
    [tokenList?.tokens]
  )
  const aggregatedPools = useMemo(
    () => aggregateLiquidityPools(tokenPoolRecords),
    [tokenPoolRecords]
  )
  const routeBackedPoolAddresses = useMemo(
    () => getRouteBackedPoolAddresses(routeMatrix),
    [routeMatrix]
  )
  const topPools = aggregatedPools.slice(0, 9)

  return (
    <div className="container mx-auto px-4 py-6 sm:py-8">
      <div className="mb-6 max-w-4xl sm:mb-8">
        <div className="mb-3 inline-flex rounded-full border border-primary-200 bg-primary-50 px-3 py-1 text-xs font-semibold uppercase tracking-[0.2em] text-primary-700">
          Live Pool Inventory
        </div>
        <h1 className="mb-3 text-3xl font-bold text-gray-900 dark:text-white sm:text-4xl">
          Pools
        </h1>
        <p className="text-base leading-7 text-gray-600 dark:text-gray-400 sm:text-lg sm:leading-8">
          This page now summarizes the live pool inventory discovered through mission-control token
          pool endpoints and cross-checks it against the current route matrix.
        </p>
      </div>

      {loadingError ? (
        <Card className="mb-6 border border-red-200 bg-red-50/70 dark:border-red-900/50 dark:bg-red-950/20">
          <p className="text-sm leading-6 text-red-900 dark:text-red-100">{loadingError}</p>
        </Card>
      ) : null}

      <div className="mb-8 grid gap-4 md:grid-cols-3">
        <Card className="border border-emerald-200 bg-emerald-50/70 dark:border-emerald-900/50 dark:bg-emerald-950/20">
          <div className="text-sm font-semibold uppercase tracking-wide text-emerald-800 dark:text-emerald-100">
            Unique pools
          </div>
          <div className="mt-2 text-3xl font-bold text-gray-900 dark:text-white">
            {formatNumber(aggregatedPools.length)}
          </div>
          <div className="mt-2 text-sm text-gray-700 dark:text-gray-300">
            Discovered across {formatNumber(featuredTokens.length)} featured Chain 138 tokens.
          </div>
        </Card>
        <Card className="border border-sky-200 bg-sky-50/70 dark:border-sky-900/50 dark:bg-sky-950/20">
          <div className="text-sm font-semibold uppercase tracking-wide text-sky-800 dark:text-sky-100">
            Route-backed pools
          </div>
          <div className="mt-2 text-3xl font-bold text-gray-900 dark:text-white">
            {formatNumber(routeBackedPoolAddresses.length)}
          </div>
          <div className="mt-2 text-sm text-gray-700 dark:text-gray-300">
            Unique pool addresses referenced by the live route matrix.
          </div>
        </Card>
        <Card>
          <div className="text-sm text-gray-500 dark:text-gray-400">Featured coverage</div>
          <div className="mt-2 text-3xl font-bold text-gray-900 dark:text-white">
            {formatNumber(tokenPoolRecords.filter((record) => record.pools.length > 0).length)}
          </div>
          <div className="mt-2 text-sm text-gray-600 dark:text-gray-400">
            Featured tokens currently returning at least one live pool.
          </div>
        </Card>
      </div>

      <div className="mb-8">
        <Card title="Live Pool Cards">
          <div className="grid gap-4 lg:grid-cols-3">
            {topPools.map((pool) => (
              <div
                key={pool.address}
                className="rounded-2xl border border-gray-200 bg-gray-50 p-4 dark:border-gray-700 dark:bg-gray-900/40"
              >
                <div className="text-base font-semibold text-gray-900 dark:text-white">
                  {(pool.token0?.symbol || '?') + ' / ' + (pool.token1?.symbol || '?')}
                </div>
                <div className="mt-1 text-sm text-gray-600 dark:text-gray-400">
                  {pool.dex || 'Unknown DEX'} · TVL {formatCurrency(pool.tvl)}
                </div>
                <div className="mt-1 text-xs text-gray-500 dark:text-gray-400">
                  {truncateMiddle(pool.address, 10, 8)}
                </div>
                <div className="mt-2 text-sm text-gray-600 dark:text-gray-400">
                  Seen from {pool.sourceSymbols.join(', ')}
                </div>
              </div>
            ))}
            {topPools.length === 0 ? (
              <p className="text-sm text-gray-600 dark:text-gray-400">No live pools available right now.</p>
            ) : null}
          </div>
        </Card>
      </div>

      <div className="mb-8 grid gap-6 lg:grid-cols-[1fr_1fr]">
        <Card title="Featured Token Pool Counts">
          <div className="space-y-4">
            {featuredTokens.map((token) => {
              const record = tokenPoolRecords.find((entry) => entry.symbol === token.symbol)
              return (
                <div
                  key={token.address}
                  className="rounded-2xl border border-gray-200 bg-gray-50 p-4 dark:border-gray-700 dark:bg-gray-900/40"
                >
                  <div className="flex items-center justify-between gap-3">
                    <div>
                      <div className="text-base font-semibold text-gray-900 dark:text-white">
                        {token.symbol}
                      </div>
                      <div className="mt-1 text-sm text-gray-600 dark:text-gray-400">
                        {token.name || 'Unnamed token'}
                      </div>
                    </div>
                    <div className="text-sm font-semibold text-gray-900 dark:text-white">
                      {formatNumber(record?.pools.length || 0)} pools
                    </div>
                  </div>
                </div>
              )
            })}
          </div>
        </Card>

        <Card title="Liquidity Shortcuts">
          <div className="space-y-4 text-sm leading-6 text-gray-600 dark:text-gray-400">
            <p>
              The broader liquidity page now shows live route, planner, and pool access together.
            </p>
            <p>
              The current route matrix publishes {formatNumber(routeMatrix?.counts?.liveSwapRoutes)} live
              swap routes and {formatNumber(routeMatrix?.counts?.liveBridgeRoutes)} bridge routes.
            </p>
            <div className="flex flex-wrap gap-3">
              <Link
                href="/liquidity"
                className="rounded-full bg-primary-600 px-4 py-2 text-sm font-medium text-white transition hover:bg-primary-700"
              >
                Open liquidity access
              </Link>
              <Link
                href="/routes"
                className="rounded-full border border-gray-300 px-4 py-2 text-sm font-medium text-gray-700 transition hover:border-primary-400 hover:text-primary-700 dark:border-gray-600 dark:text-gray-300 dark:hover:text-primary-300"
              >
                Open routes page
              </Link>
              <Link
                href="/wallet"
                className="rounded-full border border-gray-300 px-4 py-2 text-sm font-medium text-gray-700 transition hover:border-primary-400 hover:text-primary-700 dark:border-gray-600 dark:text-gray-300 dark:hover:text-primary-300"
              >
                Open wallet tools
              </Link>
            </div>
          </div>
        </Card>
      </div>
    </div>
  )
}