<?php

namespace App\Module\Mex\Metrics;

use App\Module\Fund\Enums\FUND_CURRENCY_TYPE;
use App\Module\Mex\Models\MexDailyPriceTrend;
use Dcat\Admin\Widgets\Metrics\Line;
use Illuminate\Http\Request;

/**
 * 农贸市场价格趋势图表 - 多线图（最低，最高，均价）
 */
class PriceTrendChart extends Line
{
    /**
     * 商品ID
     */
    protected $itemId;

    /**
     * 商品名称
     */
    protected $itemName;

    /**
     * 构造函数
     */
    public function __construct($itemId = null, $itemName = null)
    {
        $this->itemId = $itemId;
        $this->itemName = $itemName;
        parent::__construct();
    }

    /**
     * 初始化卡片内容
     *
     * @return void
     */
    protected function init()
    {
        parent::init();

        $title = $this->itemName ? "{$this->itemName} - 价格趋势" : '价格趋势';
        $this->title($title);
        $this->height(400);
        $this->chartHeight(300);

        // 设置下拉选项
        $this->dropdown([
            '7' => '最近 7 天',
            '14' => '最近 14 天',
            '30' => '最近 30 天',
            '90' => '最近 90 天',
        ]);
    }

    /**
     * 处理请求
     *
     * @param Request $request
     * @return mixed|void
     */
    public function handle(Request $request)
    {
        $days = (int) $request->get('option', 7);
        $itemId = $this->itemId ?? $request->get('item_id');
        $currencyType = $request->get('currency_type', FUND_CURRENCY_TYPE::ZUANSHI->value);

        $data = $this->getMultiLinePriceTrendData($days, $itemId, $currencyType);

        // 卡片内容 - 显示最新收盘价
        $latestPrice = $data['latest_close_price'] ?? 0;
        $priceChange = $data['price_change'] ?? 0;
        $changePercent = $data['change_percent'] ?? 0;

        $changeText = $priceChange >= 0 ? "+{$changePercent}%" : "{$changePercent}%";
        $this->withContent(number_format($latestPrice, 5), $changeText);

        // 添加详细信息
        $dataCount = count($data['dates']);
        $this->subTitle("数据点: {$dataCount} | 时间范围: {$days}天");

        // 图表数据 - 多线图
        $this->withMultiLineChart($data);
    }

    /**
     * 获取多线价格趋势数据
     *
     * @param int $days
     * @param int|null $itemId
     * @param int $currencyType
     * @return array
     */
    protected function getMultiLinePriceTrendData(int $days, ?int $itemId = null, int $currencyType = 2): array
    {
        $startDate = now()->subDays($days - 1)->toDateString();
        $endDate = now()->toDateString();

        if ($itemId) {
            // 如果指定了商品ID，显示该商品的价格趋势
            $trends = MexDailyPriceTrend::whereBetween('trade_date', [$startDate, $endDate])
                ->where('currency_type', $currencyType)
                ->where('item_id', $itemId)
                ->orderBy('trade_date')
                ->get();
        } else {
            // 如果没有指定商品ID，显示所有商品的平均价格趋势
            $trends = MexDailyPriceTrend::selectRaw('
                    trade_date,
                    AVG(open_price) as avg_open_price,
                    AVG(close_price) as avg_close_price,
                    AVG(high_price) as avg_high_price,
                    AVG(low_price) as avg_low_price
                ')
                ->whereBetween('trade_date', [$startDate, $endDate])
                ->where('currency_type', $currencyType)
                ->groupBy('trade_date')
                ->orderBy('trade_date')
                ->get();
        }

        $dates = [];
        $openPrices = [];
        $closePrices = [];
        $highPrices = [];
        $lowPrices = [];
        $latestClosePrice = 0;
        $firstClosePrice = 0;

        foreach ($trends as $trend) {
            // 确保 trade_date 被正确解析为 Carbon 对象
            $tradeDate = $trend->trade_date instanceof \Carbon\Carbon
                ? $trend->trade_date
                : \Carbon\Carbon::parse($trend->trade_date);
            $dates[] = $tradeDate->format('m-d');

            if ($itemId) {
                // 单个商品的数据
                $openPrices[] = (float) $trend->open_price;
                $closePrices[] = (float) $trend->close_price;
                $highPrices[] = (float) $trend->high_price;
                $lowPrices[] = (float) $trend->low_price;

                if (!$firstClosePrice) {
                    $firstClosePrice = (float) $trend->close_price;
                }
                $latestClosePrice = (float) $trend->close_price;
            } else {
                // 平均价格数据
                $openPrices[] = (float) $trend->avg_open_price;
                $closePrices[] = (float) $trend->avg_close_price;
                $highPrices[] = (float) $trend->avg_high_price;
                $lowPrices[] = (float) $trend->avg_low_price;

                if (!$firstClosePrice) {
                    $firstClosePrice = (float) $trend->avg_close_price;
                }
                $latestClosePrice = (float) $trend->avg_close_price;
            }
        }

        // 计算价格变化
        $priceChange = $latestClosePrice - $firstClosePrice;
        $changePercent = $firstClosePrice > 0 ? round(($priceChange / $firstClosePrice) * 100, 2) : 0;

        return [
            'dates' => $dates,
            'open_prices' => $openPrices,
            'close_prices' => $closePrices,
            'high_prices' => $highPrices,
            'low_prices' => $lowPrices,
            'latest_close_price' => $latestClosePrice,
            'price_change' => $priceChange,
            'change_percent' => $changePercent,
        ];
    }

    /**
     * 设置多线图表数据
     *
     * @param array $data
     * @return $this
     */
    public function withMultiLineChart(array $data)
    {
        $series = [
            [
                'name' => '最低价',
                'data' => $data['low_prices'],
            ],
            [
                'name' => '最高价',
                'data' => $data['high_prices'],
            ],
            [
                'name' => '收盘价',
                'data' => $data['close_prices'],
            ],
        ];

        // 定义不同线条的颜色
        $colors = [
            '#52c41a', // 绿色 - 最低价
            '#f5222d', // 红色 - 最高价
            '#1890ff', // 蓝色 - 收盘价
        ];

        return $this->chart([
            'series' => $series,
            'colors' => $colors,
            'xaxis' => [
                'categories' => $data['dates'],
                'labels' => [
                    'show' => true,
                ],
            ],
            'legend' => [
                'show' => true,
                'position' => 'bottom',
                'horizontalAlign' => 'center'
            ],
            'tooltip' => [
                'shared' => true,
                'intersect' => false,
            ],
        ]);
    }

    /**
     * 设置图表数据（兼容旧方法）
     *
     * @param array $data
     * @param array $categories
     * @return $this
     */
    public function withChart(array $data, array $categories)
    {
        return $this->chart([
            'series' => [
                [
                    'name' => '平均价格',
                    'data' => $data,
                ],
            ],
            'xaxis' => [
                'categories' => $categories,
            ],
        ]);
    }
}