package payment

import (
	"context"
	"log"

	"gorm.io/gorm"
	"hfb_sys/backend/internal/model"
	"hfb_sys/backend/internal/modules/order"
	"hfb_sys/backend/internal/modules/paymentconfig"
)

type Repository struct {
	db         *gorm.DB
	configRepo *paymentconfig.Repository
	orderRepo  *order.Repository
}

type runtimePaymentConfig struct {
	ID         uint64
	Provider   string
	MerchantID string
	PayWay     string
	JSPayFlag  string
	NotifyURL  string
	JumpURL    string
	Channel    channelClient
}

const (
	channelSourceCreate = "create"
	channelSourceQuery  = "query"
	channelSourceNotify = "notify"
	channelSourceMock   = "mock"
)

var refundBizTypes = []string{
	"cancel_refund",
	"admin_close_refund",
	"admin_refund",
	"checkout_refund",
	"deposit_refund",
	"rent_refund",
	"arbitration_refund",
}

func RefundBizTypes() []string {
	out := make([]string, len(refundBizTypes))
	copy(out, refundBizTypes)
	return out
}

// NewRepository 创建支付仓库，注入支付配置仓库和订单仓库。
func NewRepository(db *gorm.DB, configRepo *paymentconfig.Repository, orderRepo *order.Repository) *Repository {
	return &Repository{
		db:         db,
		configRepo: configRepo,
		orderRepo:  orderRepo,
	}
}

// isMockMode 判断当前运行时配置是否为模拟支付。
func (c runtimePaymentConfig) isMockMode() bool {
	return c.Provider == "mock"
}

// defaultRuntimeConfig 按支付方式获取默认启用配置，用于新支付单创建。
func (r *Repository) defaultRuntimeConfig(ctx context.Context, payWay string) (*runtimePaymentConfig, error) {
	if r.configRepo == nil {
		return nil, ErrPaymentUnavailable
	}
	dto, err := r.configRepo.FindDefaultByPayWay(ctx, payWay, true)
	if err != nil {
		return nil, err
	}
	return runtimeConfigFromDTO(dto), nil
}

// runtimeConfigForPayment 回溯支付单当时命中的配置，优先使用 payment_config_id。
func (r *Repository) runtimeConfigForPayment(ctx context.Context, payment *model.PaymentOrder) (*runtimePaymentConfig, error) {
	provider := firstNonEmpty(payment.Provider, "mock")
	merchantID := payment.MerchantID
	payWay := normalizePayWay(payment.PayWay)
	if r.configRepo != nil && payment.PaymentConfigID > 0 {
		dto, err := r.configRepo.FindRuntimeByID(ctx, payment.PaymentConfigID, true)
		if err == nil {
			return runtimeConfigFromDTO(dto), nil
		}
		if err != paymentconfig.ErrConfigNotFound {
			return nil, err
		}
	}
	if r.configRepo != nil && merchantID != "" {
		dto, err := r.configRepo.FindByProviderMerchantPayWay(ctx, provider, merchantID, payWay, true)
		if err == nil {
			return runtimeConfigFromDTO(dto), nil
		}
		if err != paymentconfig.ErrConfigNotFound {
			return nil, err
		}
		dto, err = r.configRepo.FindByProviderMerchant(ctx, provider, merchantID, true)
		if err == nil {
			return runtimeConfigFromDTO(dto), nil
		}
		if err != paymentconfig.ErrConfigNotFound {
			return nil, err
		}
	}
	if provider != "leshua" {
		if provider == "lakala" && r.configRepo != nil {
			dto, err := r.configRepo.FindDefaultByProviderPayWay(ctx, provider, payWay, true)
			if err != nil {
				return nil, err
			}
			return runtimeConfigFromDTO(dto), nil
		}
		return &runtimePaymentConfig{
			Provider:   provider,
			MerchantID: merchantID,
		}, nil
	}
	if r.configRepo == nil {
		return nil, ErrPaymentUnavailable
	}
	dto, err := r.configRepo.FindDefaultByProviderPayWay(ctx, provider, payWay, true)
	if err != nil {
		return nil, err
	}
	return runtimeConfigFromDTO(dto), nil
}

// runtimeConfigFromDTO 将后台支付配置 DTO 转为支付运行时配置。
func runtimeConfigFromDTO(dto *paymentconfig.ConfigDTO) *runtimePaymentConfig {
	provider := firstNonEmpty(dto.Provider, "mock")
	payWay := normalizePayWay(dto.PayWay)
	jsPayFlag := firstNonEmpty(dto.JSPayFlag, "2")
	client, err := buildChannelClient(dto)
	if err != nil {
		client = nil
	}
	return &runtimePaymentConfig{
		ID:         dto.ID,
		Provider:   provider,
		MerchantID: dto.MerchantID,
		PayWay:     payWay,
		JSPayFlag:  jsPayFlag,
		NotifyURL:  dto.NotifyURL,
		JumpURL:    dto.JumpURL,
		Channel:    client,
	}
}

// recordConfigUsage 记录成功支付使用的配置，失败只写日志不影响主流程。
func (r *Repository) recordConfigUsage(ctx context.Context, runtimeConfig *runtimePaymentConfig, payment *model.PaymentOrder) {
	if r.configRepo == nil || runtimeConfig == nil || payment == nil || runtimeConfig.ID == 0 {
		return
	}
	if payment.BizType != "order_pay" || payment.Status != "paid" {
		return
	}
	if err := r.configRepo.RecordUsage(ctx, runtimeConfig.ID, payment.ID, runtimeConfig.Provider, runtimeConfig.MerchantID, payment.AmountCent, payment.BizType); err != nil {
		log.Printf("[payment] record config usage failed config_id=%d payment_id=%d err=%v", runtimeConfig.ID, payment.ID, err)
	}
}