<?php

namespace App\Livewire;

use App\Services\LearningAnalyticsService;
use Livewire\Component;

class MasteryHeatmap extends Component
{
    public string $studentId = '';
    public array $heatmapData = [];
    public bool $isLoading = false;
    public string $errorMessage = '';

    // 热力图配置
    public array $config = [
        'cellSize' => 60,
        'itemWidth' => 100,
        'itemHeight' => 80,
        'colorStops' => [
            ['offset' => 0, 'color' => '#ef4444', 'name' => '薄弱'],
            ['offset' => 0.5, 'color' => '#f59e0b', 'name' => '一般'],
            ['offset' => 0.7, 'color' => '#10b981', 'name' => '良好'],
            ['offset' => 1, 'color' => '#3b82f6', 'name' => '掌握'],
        ]
    ];

    public function mount(string $studentId): void
    {
        $this->studentId = $studentId;
        $this->loadHeatmapData();
    }

    public function loadHeatmapData(): void
    {
        $this->isLoading = true;
        $this->errorMessage = '';

        try {
            $service = new LearningAnalyticsService();
            $masteryList = $service->getStudentMasteryList($this->studentId);

            if ($masteryList && isset($masteryList['data'])) {
                $this->heatmapData = $this->processHeatmapData($masteryList['data']);
            } else {
                $this->heatmapData = [];
            }
        } catch (\Exception $e) {
            $this->errorMessage = '加载热力图数据失败：' . $e->getMessage();
            $this->heatmapData = [];
        } finally {
            $this->isLoading = false;
        }
    }

    /**
     * 处理热力图数据
     */
    private function processHeatmapData(array $masteryList): array
    {
        $processedData = [];
        $categories = []; // 知识分类

        foreach ($masteryList as $mastery) {
            $kpCode = $mastery['kp_code'];
            $masteryLevel = $mastery['mastery_level'];
            $trend = $mastery['mastery_trend'];

            // 根据知识点编码提取分类
            $category = $this->extractCategory($kpCode);
            if (!in_array($category, $categories)) {
                $categories[] = $category;
            }

            // 确定颜色
            $color = $this->getMasteryColor($masteryLevel);
            $borderColor = $this->getTrendColor($trend);

            $processedData[] = [
                'kp_code' => $kpCode,
                'category' => $category,
                'mastery_level' => $masteryLevel,
                'accuracy_rate' => $mastery['accuracy_rate'],
                'total_attempts' => $mastery['total_attempts'],
                'trend' => $trend,
                'color' => $color,
                'border_color' => $borderColor,
                'text_color' => $masteryLevel > 0.5 ? '#ffffff' : '#000000',
            ];
        }

        // 按分类排序
        usort($categories, fn($a, $b) => $a <=> $b);

        return [
            'data' => $processedData,
            'categories' => $categories,
        ];
    }

    /**
     * 根据知识点编码提取分类
     */
    private function extractCategory(string $kpCode): string
    {
        // 简单的分类逻辑，实际应根据知识点体系进行分类
        if (strpos($kpCode, 'KP') === 0) {
            $number = (int) substr($kpCode, 2);
            if ($number >= 100 && $number < 200) {
                return '基础概念';
            } elseif ($number >= 200 && $number < 300) {
                return '基础技能';
            } elseif ($number >= 300 && $number < 400) {
                return '综合应用';
            } elseif ($number >= 400 && $number < 500) {
                return '高级技巧';
            } else {
                return '其他';
            }
        }

        return '未分类';
    }

    /**
     * 根据掌握度获取颜色
     */
    private function getMasteryColor(float $masteryLevel): string
    {
        if ($masteryLevel < 0.3) {
            return '#ef4444'; // 红色 - 薄弱
        } elseif ($masteryLevel < 0.5) {
            return '#f97316'; // 橙色 - 需要改进
        } elseif ($masteryLevel < 0.7) {
            return '#eab308'; // 黄色 - 一般
        } elseif ($masteryLevel < 0.85) {
            return '#22c55e'; // 绿色 - 良好
        } else {
            return '#3b82f6'; // 蓝色 - 掌握
        }
    }

    /**
     * 根据趋势获取边框颜色
     */
    private function getTrendColor(string $trend): string
    {
        return match ($trend) {
            'improving' => '#10b981', // 绿色上升箭头
            'stable' => '#6b7280',    // 灰色横线
            'declining' => '#ef4444', // 红色下降箭头
            'insufficient' => '#d1d5db', // 灰色虚线
            default => '#9ca3af',
        };
    }

    /**
     * 获取掌握度等级名称
     */
    public function getMasteryLevelName(float $masteryLevel): string
    {
        if ($masteryLevel < 0.3) {
            return '薄弱';
        } elseif ($masteryLevel < 0.5) {
            return '入门';
        } elseif ($masteryLevel < 0.7) {
            return '进阶';
        } elseif ($masteryLevel < 0.85) {
            return '熟练';
        } else {
            return '精通';
        }
    }

    /**
     * 获取趋势图标
     */
    public function getTrendIcon(string $trend): string
    {
        return match ($trend) {
            'improving' => '↗',
            'stable' => '→',
            'declining' => '↘',
            'insufficient' => '⋯',
            default => '?',
        };
    }

    public function render()
    {
        return view('livewire.mastery-heatmap');
    }
}