<?php

namespace App\Http\Controllers\Admin;

use App\Services\WorldCup\WorldCupBetService;
use App\Services\WorldCup\WorldCupOddsService;
use App\Services\WorldCup\WorldCupScheduleUpdateService;
use App\Services\WorldCup\WorldCupSettlementService;
use Illuminate\Http\Request;

class WorldCupMarketController extends BaseController
{
    private $oddsService;

    private $betService;

    private $scheduleService;

    private $settlementService;

    public function __construct(
        WorldCupOddsService $oddsService,
        WorldCupBetService $betService,
        WorldCupScheduleUpdateService $scheduleService,
        WorldCupSettlementService $settlementService
    ) {
        $this->oddsService = $oddsService;
        $this->betService = $betService;
        $this->scheduleService = $scheduleService;
        $this->settlementService = $settlementService;
    }

    public function odds(Request $request)
    {
        $filters = [
            'market' => (string)$request->input('market', ''),
            'match_id' => (string)$request->input('match_id', ''),
            'limit' => (int)$request->input('limit', 300),
        ];

        if ($this->wantsJson($request)) {
            return $this->json(200, 'success', [
                'list' => $this->oddsService->listOdds($filters),
            ]);
        }

        return view('admin.world_cup.odds', [
            'filters' => $filters,
            'odds' => $this->oddsService->listOdds($filters),
            'matches' => $this->scheduleService->allMatches(),
            'result' => $request->session()->get('world_cup_odds_result'),
        ]);
    }

    public function saveOdds(Request $request)
    {
        $result = $this->oddsService->saveOdds([
            'market' => (string)$request->input('market', ''),
            'match_id' => $request->input('match_id') === '' ? null : $request->input('match_id'),
            'selection' => (string)$request->input('selection', ''),
            'decimal_odds' => (float)$request->input('decimal_odds', 0),
            'is_active' => (int)$request->input('is_active', 0),
            'locked_weight' => (int)$request->input('locked_weight', 0),
        ]);

        return $this->respond($request, $result, '/admin/world-cup/odds', 'world_cup_odds_result');
    }

    public function importOdds(Request $request)
    {
        $rows = $this->parseCsvRows($request);
        $result = $rows === null
            ? [
                'success' => false,
                'message' => 'Invalid CSV file',
                'data' => [
                    'updated' => 0,
                    'skipped' => 0,
                    'errors' => [],
                ],
            ]
            : $this->oddsService->importOddsRows(
                (string)$request->input('market', ''),
                $rows
            );

        return $this->respond($request, $result, '/admin/world-cup/odds', 'world_cup_odds_result');
    }

    public function bets(Request $request)
    {
        $result = $this->betService->adminBetLogs([
            'game_id' => $request->input('game_id', ''),
            'user_id' => $request->input('user_id', ''),
            'status' => $request->input('status', ''),
            'market' => $request->input('market', ''),
            'limit' => (int)$request->input('limit', 100),
        ]);

        if ($this->wantsJson($request)) {
            return $this->json(200, 'success', [
                'list' => $result['list'],
            ]);
        }

        return view('admin.world_cup.bets', [
            'filters' => $result['filters'],
            'list' => $result['list'],
        ]);
    }

    public function settlement(Request $request)
    {
        if ($this->wantsJson($request)) {
            return $this->json(200, 'success', [
                'matches' => $this->scheduleService->allMatches(),
            ]);
        }

        return view('admin.world_cup.settlement', [
            'matches' => $this->scheduleService->allMatches(),
            'result' => $request->session()->get('world_cup_settlement_result'),
        ]);
    }

    public function settleMatch(Request $request)
    {
        $result = $this->settlementService->settleMatch(
            (int)$request->input('match_id', 0),
            (string)$request->input('result', ''),
            $this->actor($request)
        );

        return $this->respond($request, $result, '/admin/world-cup/settlement', 'world_cup_settlement_result');
    }

    public function settleWinner(Request $request)
    {
        $result = $this->settlementService->settleWinner(
            (string)$request->input('selection', ''),
            $this->actor($request)
        );

        return $this->respond($request, $result, '/admin/world-cup/settlement', 'world_cup_settlement_result');
    }

    private function respond(Request $request, array $result, string $url, string $sessionKey)
    {
        if ($this->wantsJson($request)) {
            return $this->json($result['success'] ? 200 : 400, $result['message'] ?: 'success', $result['data']);
        }

        return redirect($url)->with($sessionKey, $result);
    }

    private function actor(Request $request): string
    {
        return (string)($request->session()->get('admin.username') ?: 'admin');
    }

    private function wantsJson(Request $request): bool
    {
        return $request->ajax()
            || $request->expectsJson()
            || $request->input('format') === 'json';
    }

    private function parseCsvRows(Request $request): ?array
    {
        if (!$request->hasFile('csv_file') || !$request->file('csv_file')->isValid()) {
            return null;
        }

        $handle = fopen($request->file('csv_file')->getRealPath(), 'r');
        if ($handle === false) {
            return null;
        }

        $headers = null;
        $rows = [];

        while (($data = fgetcsv($handle)) !== false) {
            if ($headers === null) {
                $headers = $this->normalizeCsvHeaders($data);
                continue;
            }

            if ($this->isEmptyCsvRow($data)) {
                continue;
            }

            $values = array_slice(array_pad($data, count($headers), ''), 0, count($headers));
            $rows[] = array_combine($headers, $values);
        }

        fclose($handle);

        return $headers === null ? null : $rows;
    }

    private function normalizeCsvHeaders(array $headers): array
    {
        return array_map(function ($header) {
            return trim(str_replace("\xEF\xBB\xBF", '', (string)$header));
        }, $headers);
    }

    private function isEmptyCsvRow(array $row): bool
    {
        foreach ($row as $value) {
            if (trim((string)$value) !== '') {
                return false;
            }
        }

        return true;
    }
}