<?php

namespace App\Helpers;

class FinancePageChartHelper
{
    /**
     * Extracts labels and values for the "Évolution du chiffre d’affaires" line chart.
     *
     * @param array $item Raw data for the chart.
     * @return array{labels: array, values: array} Normalized chart data.
     */
    public static function getAffairEvolution(array $item): array
    {
        $list = $item['list_affair_values'] ?? [];

        return [
            'labels' => array_column($list, 'string_label'),
            'values' => array_map('floatval', array_column($list, 'string_value')),
        ];
    }

    /**
     * Extracts labels and values for the "Répartition du chiffre d’affaires" pie chart.
     *
     * @param array $item Raw data for the chart.
     * @return array{labels: array, values: array} Normalized chart data.
     */
    public static function getRepartitionAffair(array $item): array
    {
        $list = $item['list_last_repartition_affair_values'] ?? [];

        return [
            'labels' => array_column($list, 'string_label'),
            'values' => array_map('floatval', array_column($list, 'string_value')),
        ];
    }

    /**
     * Extracts active and passive values for the stacked bar chart (Bilan Simplifié).
     *
     * @param array $item Raw data for the chart.
     * @return array{labels: array, datasets: array} Normalized stacked datasets.
     */
    public static function getBilanSimplify(array $item): array
    {
        $active  = $item['list_bilan_simplify_active_values'] ?? [];
        $passive = $item['list_bilan_simplify_passive_values'] ?? [];

        $datasets = [];

        foreach ($active as $a) {
            $datasets[] = [
                'label' => $a['string_label_active_simplify'],
                'data' => [floatval($a['string_value_active_simplify'])],
                'stack' => 'Actif'
            ];
        }

        foreach ($passive as $p) {
            $datasets[] = [
                'label' => $p['string_label_passive_simplify'],
                'data' => [floatval($p['string_value_passive_simplify'])],
                'stack' => 'Passif'
            ];
        }

        return [
            'labels' => [$item['string_label']],
            'datasets' => $datasets
        ];
    }

    /**
     * Extracts labels and values for the autofinancing mixed chart.
     *
     * @param array $item Raw data for the chart.
     * @return array{labels: array, cpt: array, ivt: array} CAF and investment values.
     */
    public static function getAutofinancement(array $item): array
    {
        $labels    = [];
        $valuesCPT = [];
        $valuesIVT = [];

        foreach ($item['list_autofinancement_values'] as $row) {
            $labels[] = $row['string_autofinancement_label'];

            $inner = $row['list_autofinancement_values'][0];

            $valuesCPT[] = floatval($inner['string_autofinancement_capabilities']);
            $valuesIVT[] = floatval($inner['string_industrial_investissment']);
        }

        return [
            'labels' => $labels,
            'cpt'    => $valuesCPT,
            'ivt'    => $valuesIVT,
        ];
    }

    /**
     * Routes chart building based on chart type.
     *
     * @param string $type Chart identifier.
     * @param array  $data Raw chart data.
     * @return array Chart.js-compatible configuration.
     */
    public static function buildChart(string $type, array $data): array
    {
        switch ($type) {
            case 'list_affair':
                return self::buildAffairEvolution($data);

            case 'list_last_repartition_affair':
                return self::buildRepartitionAffair($data);

            case 'list_bilan_simplify':
                return self::buildBilanSimplify($data);

            case 'capacite_dautofinancement':
                return self::buildAutofinancement($data);

            default:
                return [];
        }
    }

    /**
     * Builds a line chart configuration for the revenue evolution.
     *
     * @param array $item Parsed chart data.
     * @return array Chart.js configuration.
     */
    private static function buildAffairEvolution(array $item): array
    {
        $data = self::getAffairEvolution($item);

        return [
            'type' => 'line',
            'data' => [
                'labels' => $data['labels'],
                'datasets' => [[
                    'label' => $item['string_label'],
                    'data' => $data['values'],
                    'borderColor' => 'rgba(54, 162, 235, 0.2)',
                    'backgroundColor' => 'rgba(54, 162, 235, 1)',
                    'borderWidth' => 1,
                ]]
            ],
            'options' => [
                'responsive' => true,
                'elements' => [
                    'point' => [
                        'radius' => 12,
                        'hitRadius' => 14,
                        'hoverRadius' => 14,
                        'pointStyle' => 'rect'
                    ],
                    'line' => [
                        'borderWidth' => 0,
                        'fill' => 'rect'
                    ]
                ],
                'legend' => ['display' => false]
            ]
        ];
    }

    /**
     * Builds a pie chart configuration for CA repartition.
     *
     * @param array $item Parsed chart data.
     * @return array Chart.js configuration.
     */
    private static function buildRepartitionAffair(array $item): array
    {
        $data = self::getRepartitionAffair($item);

        return [
            'type' => 'pie',
            'data' => [
                'labels' => $data['labels'],
                'datasets' => [[
                    'label' => $item['string_label'],
                    'data' => $data['values'],
                    'backgroundColor' => [
                        'rgba(85, 154, 213, 1)',
                        'rgba(64, 114, 203, 1)',
                        'rgba(242, 125, 32, 1)',
                        'rgba(165, 165, 165, 1)',
                        'rgba(255, 192, 0, 1)',
                        'rgba(75, 192, 192, 1)',
                    ],
                    'borderColor' => [
                        'rgba(85, 154, 213, 0.2)',
                        'rgba(64, 114, 203, 0.2)',
                        'rgba(242, 125, 32, 0.2)',
                        'rgba(165, 165, 165, 0.2)',
                        'rgba(255, 192, 0, 0.2)',
                        'rgba(75, 192, 192, 0.2)',
                    ],
                    'borderWidth' => 1
                ]]
            ],
            'options' => [
                'scales' => [
                    'y' => ['beginAtZero' => true]
                ],
                'tooltips' => [
                    'callbacks' => [
                        'label' => 'function() { return null; }'
                    ]
                ]
            ]
        ];
    }

    /**
     * Builds a stacked bar chart for the simplified balance sheet (Actif vs Passif).
     *
     * @param array $item Parsed chart data.
     * @return array Chart.js configuration.
     */
    private static function buildBilanSimplify(array $item): array
    {
        $colors = [
            'rgb(90, 155, 211)',
            'rgb(255, 170, 0)',
            'rgb(165, 165, 165)',
            'rgb(238, 126, 52)',
            'rgb(69, 116, 198)',
            'rgb(113, 174, 71)',
            'rgb(93, 169, 156)',
            'rgb(253, 199, 0)',
            'rgb(165, 165, 165)',
            'rgb(238, 166, 52)',
            'rgb(69, 80, 178)',
        ];

        $i = 0;

        $datasetActif = array_map(function ($a) use ($colors, &$i) {
            return [
                'label' => $a['string_label_active_simplify'],
                'data' => [floatval($a['string_value_active_simplify'])],
                'stack' => 'Actif',
                'backgroundColor' => $colors[$i++ % count($colors)]
            ];
        }, $item['list_bilan_simplify_active_values'] ?? []);

        $datasetPassif = array_map(function ($a) use ($colors, &$i) {
            return [
                'label' => $a['string_label_passive_simplify'],
                'data' => [floatval($a['string_value_passive_simplify'])],
                'stack' => 'Passif',
                'backgroundColor' => $colors[$i++ % count($colors)]
            ];
        }, $item['list_bilan_simplify_passive_values'] ?? []);

        $labels = ['Actif           Passif'];

        return [
            'type' => 'bar',
            'data' => [
                'labels' => $labels,
                'datasets' => array_merge($datasetActif, $datasetPassif)
            ],
            'options' => [
                'responsive' => true,
                'scales' => [
                    'x' => ['stacked' => true],
                    'y' => ['stacked' => true]
                ],
                'plugins' => [
                    'legend' => ['position' => 'bottom']
                ],
                'interaction' => [
                    'mode' => 'index',
                    'intersect' => false
                ],
                'tooltips' => [
                    'callbacks' => [
                        'title' => 'function() { return null; }'
                    ]
                ]
            ]
        ];
    }

    /**
     * Builds a mixed chart combining bars (CAF) and line (Investissements).
     *
     * @param array $item Parsed chart data.
     * @return array Chart.js configuration.
     */
    private static function buildAutofinancement(array $item): array
    {
        $data = self::getAutofinancement($item);

        return [
            'type' => 'bar',
            'data' => [
                'labels' => $data['labels'],
                'datasets' => [
                    [
                        'type' => 'line',
                        'label' => "Investissements industriels",
                        'data' => $data['ivt'],
                        'borderColor' => 'rgba(231, 122, 37, 1)',
                        'borderWidth' => 2,
                        'tension' => 0.3,
                        'order' => 1
                    ],
                    [
                        'type' => 'bar',
                        'label' => "Capacité d'autofinancement",
                        'data' => $data['cpt'],
                        'backgroundColor' => 'rgba(64, 114, 203, 1)',
                        'borderColor' => 'rgba(64, 114, 203, 0.2)',
                        'borderWidth' => 1,
                        'order' => 0
                    ]
                ]
            ],
            'options' => [
                'responsive' => true,
                'point' => [
                    'radius' => 6,
                    'hitRadius' => 8,
                    'hoverRadius' => 8,
                ],
                'legend' => [
                    'position' => 'bottom'
                ],
            ]
        ];
    }
}