// Package providerbuild is the *only* place that imports every concrete
// provider adapter package alongside internal/provider — it exists precisely
// so gateway/provider's core stays adapter-neutral (see internal/provider's
// package doc). Only main calls into this package.
//
// It cannot live inside internal/provider itself: each adapter package
// (alipay/crypto/stripe) imports internal/provider for the shared
// CreateRequest/Session/Capabilities types, so internal/provider importing
// them back would be a Go import cycle. This package sits one level up the
// dependency graph instead: providerbuild -> {provider, alipay, crypto, stripe},
// nothing imports providerbuild back.
package providerbuild

import (
	"log"
	"strings"

	sw "github.com/smartwalle/alipay/v3"
	stripeclient "github.com/stripe/stripe-go/v79/client"

	"github.com/wangjia/pay/config"
	"github.com/wangjia/pay/internal/accounts"
	"github.com/wangjia/pay/internal/provider"
	"github.com/wangjia/pay/internal/provider/alipay"
	"github.com/wangjia/pay/internal/provider/crypto"
	"github.com/wangjia/pay/internal/provider/fake"
	"github.com/wangjia/pay/internal/provider/nezha"
	"github.com/wangjia/pay/internal/provider/stripe"
)

// BuildRegistry 据 enabled 账户装配注册表:有 enabled 账户且凭证齐备的渠道才 Register。
// 缺凭证只跳过该渠道(log,不 fatal)——允许只上线部分渠道;fake adapter 只在
// config.C.MockChannelEnabled=true(env MOCK_CHANNEL_ENABLED)时注册,生产默认 false 不受影响。
func BuildRegistry(accts *accounts.Registry) *provider.Registry {
	reg := provider.NewRegistry()

	// fake:dev-only 本地联调渠道(见顶部包注释)。SettleCurrencies 覆盖成
	// ["CNY","USDT"]——CNY 排首位对齐 pangolin 下单实际结算币种(pangolin CreateOrder
	// 不传 currency,由渠道 Capabilities().SettleCurrencies[0] 驱动定价,见
	// server/internal/pay/client.go::createOrderReq),USDT 兜底覆盖其它业务方。
	if config.C.MockChannelEnabled {
		fp := fake.New()
		fp.SetSettleCurrencies([]string{"CNY", "USDT"})
		reg.Register(fp)
		log.Println("[providers] fake 已注册(MOCK_CHANNEL_ENABLED=true,dev-only)")
	}

	// crypto:整渠道一个 adapter,多地址=多账户(P5 地址池路由前取首个 enabled)。
	if len(accts.EnabledFor("crypto", "")) > 0 {
		reg.Register(crypto.New(accts))
		log.Println("[providers] crypto 已注册")
	}

	// alipay:首个 enabled 账户的 env 凭证 → *alipay.Client。
	if as := accts.EnabledFor("alipay", ""); len(as) > 0 {
		a := as[0]
		appID := accts.Credential(a.AccountID, "APP_ID")
		appPriv := accts.Credential(a.AccountID, "APP_PRIVATE_KEY")
		aliPub := accts.Credential(a.AccountID, "ALIPAY_PUBLIC_KEY")
		prod := accts.Credential(a.AccountID, "PRODUCTION") == "1"
		if appID == "" || appPriv == "" || aliPub == "" {
			log.Printf("[providers] alipay 账户 %s 凭证不全,跳过", a.AccountID)
		} else if c, err := sw.New(appID, appPriv, prod); err != nil {
			log.Printf("[providers] alipay client 构建失败: %v", err)
		} else if err := c.LoadAliPayPublicKey(aliPub); err != nil {
			log.Printf("[providers] alipay 加载公钥失败: %v", err)
		} else {
			reg.Register(alipay.New(c))
			log.Println("[providers] alipay 已注册")
		}
	}

	// nezha:RSA 聚合支付,首个 enabled 账户的 env 凭证 → *nezha.Provider。notify_url
	// 与 alipay 不同——alipay notify_url 走支付宝开放平台应用级配置(per-request 可省略),
	// 哪吒协议要求每次下单显式携带,这里据 config.C.Server.BaseURL 拼好传入。
	if ns := accts.EnabledFor("nezha", ""); len(ns) > 0 {
		n := ns[0]
		pid := accts.Credential(n.AccountID, "PID")
		priv := accts.Credential(n.AccountID, "PRIVATE_KEY")
		pub := accts.Credential(n.AccountID, "PLATFORM_PUBLIC_KEY")
		if pid == "" || priv == "" || pub == "" {
			log.Printf("[providers] nezha 账户 %s 凭证不全,跳过", n.AccountID)
		} else {
			notifyURL := strings.TrimRight(config.C.Server.BaseURL, "/") + "/api/v2/callback/nezha"
			if np, err := nezha.New(pid, priv, pub, notifyURL); err != nil {
				log.Printf("[providers] nezha client 构建失败: %v", err)
			} else {
				reg.Register(np)
				log.Println("[providers] nezha 已注册")
			}
		}
	}

	// stripe:首个 enabled 账户的 env 凭证 → *client.API。
	if ss := accts.EnabledFor("stripe", ""); len(ss) > 0 {
		s := ss[0]
		key := accts.Credential(s.AccountID, "SECRET_KEY")
		wh := accts.Credential(s.AccountID, "WEBHOOK_SECRET")
		if key == "" || wh == "" {
			log.Printf("[providers] stripe 账户 %s 凭证不全,跳过", s.AccountID)
		} else {
			sc := stripeclient.New(key, nil)
			reg.Register(stripe.New(sc, wh))
			log.Println("[providers] stripe 已注册")
		}
	}

	return reg
}