<?php

namespace App\Models\Business;

use App\Abstracts\Model;

class FundForecast extends Model
{
    protected $table = 'business_fund_forecast';

    public const BALANCE_FIELDS = [
        'balance_bank', 'balance_jd', 'balance_douyin', 'balance_dewu',
        'balance_taobao_alipay', 'balance_wechat',
    ];

    public const INCOME_FIELDS = [
        'income_jd', 'income_douyin', 'income_dewu', 'income_taobao_alipay',
        'income_goods_payment', 'income_other',
    ];

    public const EXPENSE_FIELDS = [
        'expense_supplier_goods', 'expense_courier', 'expense_paper_lamination',
        'expense_edge_band', 'expense_daily_reimbursement', 'expense_taobao_red_packet',
        'expense_board', 'expense_store_top_up', 'expense_planting', 'expense_salary',
        'expense_tax', 'expense_store_spend',
    ];

    public const SUMMARY_FIELDS = [
        'previous_month_balance', 'forecast_month_income', 'forecast_month_expense',
        'gap_surplus', 'has_gap',
    ];

    public const PAGE_FIELDS = [
        'budget_month', 'company_name', 'region', 'report_status',
        ...self::BALANCE_FIELDS,
        ...self::INCOME_FIELDS,
        ...self::EXPENSE_FIELDS,
        ...self::SUMMARY_FIELDS,
    ];

    protected $fillable = [
        'company_id',
        ...self::PAGE_FIELDS,
        // Legacy fields remain fillable so old records and rollback exports stay compatible.
        'actual_month', 'store_balance_budget', 'store_balance_actual', 'bank_balance_budget',
        'bank_balance_actual', 'other_balance_budget', 'other_balance_actual',
        'expected_monthly_return_budget', 'expected_monthly_return_actual',
        'income_total_budget', 'income_total_actual', 'prior_unpaid_budget',
        'prior_unpaid_actual', 'advance_budget', 'advance_actual', 'supplier_budget',
        'supplier_actual', 'spot_settlement_budget', 'spot_settlement_actual',
        'courier_budget', 'courier_actual', 'paper_factory_budget', 'paper_factory_actual',
        'edge_band_budget', 'edge_band_actual', 'board_budget', 'board_actual',
        'salary_budget', 'salary_actual', 'daily_expense_budget', 'daily_expense_actual',
        'planting_budget', 'planting_actual', 'red_packet_budget', 'red_packet_actual',
        'corporate_deduction_budget', 'corporate_deduction_actual',
        'expense_total_budget', 'expense_total_actual', 'bank_reservation',
        'net_balance_budget', 'net_balance_actual',
    ];

    protected $attributes = [
        'report_status' => '待填报',
    ];

    protected $casts = [
        'company_id' => 'integer',
        'has_gap' => 'boolean',
        'balance_bank' => 'decimal:2',
        'balance_jd' => 'decimal:2',
        'balance_douyin' => 'decimal:2',
        'balance_dewu' => 'decimal:2',
        'balance_taobao_alipay' => 'decimal:2',
        'balance_wechat' => 'decimal:2',
        'income_jd' => 'decimal:2',
        'income_douyin' => 'decimal:2',
        'income_dewu' => 'decimal:2',
        'income_taobao_alipay' => 'decimal:2',
        'income_goods_payment' => 'decimal:2',
        'income_other' => 'decimal:2',
        'expense_supplier_goods' => 'decimal:2',
        'expense_courier' => 'decimal:2',
        'expense_paper_lamination' => 'decimal:2',
        'expense_edge_band' => 'decimal:2',
        'expense_daily_reimbursement' => 'decimal:2',
        'expense_taobao_red_packet' => 'decimal:2',
        'expense_board' => 'decimal:2',
        'expense_store_top_up' => 'decimal:2',
        'expense_planting' => 'decimal:2',
        'expense_salary' => 'decimal:2',
        'expense_tax' => 'decimal:2',
        'expense_store_spend' => 'decimal:2',
        'previous_month_balance' => 'decimal:2',
        'forecast_month_income' => 'decimal:2',
        'forecast_month_expense' => 'decimal:2',
        'gap_surplus' => 'decimal:2',
    ];

    protected static function booted(): void
    {
        static::creating(function (self $forecast): void {
            if (empty($forecast->company_id)) {
                $forecast->company_id = company_id() ?: 1;
            }
        });

        static::saving(function (self $forecast): void {
            $balance = self::sumFields($forecast, self::BALANCE_FIELDS);
            $income = self::sumFields($forecast, self::INCOME_FIELDS);
            $expense = self::sumFields($forecast, self::EXPENSE_FIELDS);
            $gap = round($balance + $income - $expense, 2);

            $forecast->previous_month_balance = $balance;
            $forecast->forecast_month_income = $income;
            $forecast->forecast_month_expense = $expense;
            $forecast->gap_surplus = $gap;
            $forecast->has_gap = $gap < 0;
        });
    }

    private static function sumFields(self $forecast, array $fields): float
    {
        return array_reduce(
            $fields,
            fn (float $sum, string $field): float => round($sum + round((float) ($forecast->{$field} ?? 0), 2), 2),
            0.0,
        );
    }

    public static function columnLabels(): array
    {
        return [
            'company_name' => '公司名称',
            'region' => '所属区域',
            'report_status' => '填报状态',
            'budget_month' => '预算月份',
            'actual_month' => '实际月份',
            'store_balance_budget' => '店铺余额（预算）',
            'store_balance_actual' => '店铺余额（实际）',
            'bank_balance_budget' => '银行余额（预算）',
            'bank_balance_actual' => '银行余额（实际）',
            'other_balance_budget' => '其他余额（预算）',
            'other_balance_actual' => '其他余额（实际）',
            'expected_monthly_return_budget' => '预计回款（预算）',
            'expected_monthly_return_actual' => '预计回款（实际）',
            'income_total_budget' => '收入合计（预算）',
            'income_total_actual' => '收入合计（实际）',
            'prior_unpaid_budget' => '往期未付（预算）',
            'prior_unpaid_actual' => '往期未付（实际）',
            'advance_budget' => '借支（预算）',
            'advance_actual' => '借支（实际）',
            'supplier_budget' => '供应商（预算）',
            'supplier_actual' => '供应商（实际）',
            'spot_settlement_budget' => '现结（预算）',
            'spot_settlement_actual' => '现结（实际）',
            'courier_budget' => '快递（预算）',
            'courier_actual' => '快递（实际）',
            'paper_factory_budget' => '纸厂压贴（预算）',
            'paper_factory_actual' => '纸厂压贴（实际）',
            'edge_band_budget' => '封边条（预算）',
            'edge_band_actual' => '封边条（实际）',
            'board_budget' => '板材（预算）',
            'board_actual' => '板材（实际）',
            'salary_budget' => '工资（预算）',
            'salary_actual' => '工资（实际）',
            'daily_expense_budget' => '日常费用（预算）',
            'daily_expense_actual' => '日常费用（实际）',
            'planting_budget' => '种菜（预算）',
            'planting_actual' => '种菜（实际）',
            'red_packet_budget' => '红包（预算）',
            'red_packet_actual' => '红包（实际）',
            'corporate_deduction_budget' => '对公扣款（预算）',
            'corporate_deduction_actual' => '对公扣款（实际）',
            'expense_total_budget' => '支出合计（预算）',
            'expense_total_actual' => '支出合计（实际）',
            'bank_reservation' => '银行预留',
            'net_balance_budget' => '净结余（预算）',
            'net_balance_actual' => '净结余（实际）',
            'balance_bank' => '银行',
            'balance_jd' => '京东',
            'balance_douyin' => '抖音',
            'balance_dewu' => '得物',
            'balance_taobao_alipay' => '淘系支付宝',
            'balance_wechat' => '微信',
            'income_jd' => '京东',
            'income_douyin' => '抖音',
            'income_dewu' => '得物',
            'income_taobao_alipay' => '淘系支付宝',
            'income_goods_payment' => '货款',
            'income_other' => '其他收入',
            'expense_supplier_goods' => '供应商货款',
            'expense_courier' => '快递款',
            'expense_paper_lamination' => '纸厂压贴',
            'expense_edge_band' => '封边条',
            'expense_daily_reimbursement' => '日常报销',
            'expense_taobao_red_packet' => '淘宝红包',
            'expense_board' => '板材',
            'expense_store_top_up' => '店铺充值',
            'expense_planting' => '种菜',
            'expense_salary' => '工资',
            'expense_tax' => '税金',
            'expense_store_spend' => '店铺花费（暂估10%）',
            'previous_month_balance' => '上月末总余额',
            'forecast_month_income' => '预测本月收入',
            'forecast_month_expense' => '预测本月支付',
            'gap_surplus' => '缺口/盈余',
            'has_gap' => '是否有缺口',
        ];
    }

    public static function fieldTypes(): array
    {
        return array_replace(
            array_fill_keys([
                ...self::BALANCE_FIELDS,
                ...self::INCOME_FIELDS,
                ...self::EXPENSE_FIELDS,
                'previous_month_balance', 'forecast_month_income',
                'forecast_month_expense', 'gap_surplus',
            ], 'currency'),
            [
                'report_status' => 'select',
                'has_gap' => 'boolean',
            ],
        );
    }
}