// Package httpapi 路由装配。各业务模块在各自包内实现 handler，这里只负责挂载，
// 并按配置在真实外部依赖（微信/支付/OSS/ASR）与 mock 之间切换。
package httpapi

import (
	"context"
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/redis/go-redis/v9"
	"gorm.io/gorm"

	"dudu/server/internal/asr"
	"dudu/server/internal/auth"
	"dudu/server/internal/billing"
	"dudu/server/internal/config"
	"dudu/server/internal/feedback"
	"dudu/server/internal/gateway"
	"dudu/server/internal/quota"
	"dudu/server/internal/telemetry"
	"dudu/server/internal/user"
)

type Deps struct {
	Cfg   config.Config
	DB    *gorm.DB
	RDB   *redis.Client
	JWT   *auth.JWT
	Quota *quota.Manager
}

// pickProvider 按配置选择 ASR Provider（gummy 在 6B 实现 + DASHSCOPE_API_KEY 就绪后接入）。
func pickProvider(cfg config.Config) asr.Provider {
	switch cfg.ASRProvider {
	default:
		return asr.NewMock()
	}
}

// pickWechat 微信凭证未配置（#2A 申请中）时使用 mock。
func pickWechat(cfg config.Config) auth.WechatClient {
	if cfg.WechatWebAppID == "" {
		return auth.MockWechat{}
	}
	return auth.MockWechat{} // TODO(5C-真实): 开放平台实现，凭证就绪后替换
}

// pickPay 商户号未配置（#2B 申请中）时使用 mock。
func pickPay(cfg config.Config) billing.PayClient {
	if cfg.WxPayMchID == "" {
		return billing.MockPay{}
	}
	return billing.MockPay{} // TODO(7D-真实): wechatpay-go 实现，商户号就绪后替换
}

// pickStorage OSS 未配置时图片落本地盘。
func pickStorage(cfg config.Config) feedback.Storage {
	if cfg.OSSBucket == "" {
		return feedback.LocalStorage{Dir: "var/uploads"}
	}
	return feedback.LocalStorage{Dir: "var/uploads"} // TODO(8C-真实): OSS 实现
}

func Register(r *gin.Engine, d *Deps) {
	r.GET("/healthz", func(c *gin.Context) { c.JSON(http.StatusOK, gin.H{"ok": true}) })

	authH := &auth.Handlers{DB: d.DB, RDB: d.RDB, JWT: d.JWT, Wechat: pickWechat(d.Cfg)}
	billH := &billing.Handlers{DB: d.DB, Pay: pickPay(d.Cfg), Quota: d.Quota}
	userH := &user.Handlers{DB: d.DB, Quota: d.Quota}
	fbH := &feedback.Handlers{DB: d.DB, RDB: d.RDB, Storage: pickStorage(d.Cfg)}
	telH := telemetry.New(d.DB, d.RDB)
	gwH := &gateway.Handler{Provider: pickProvider(d.Cfg), Quota: d.Quota, RDB: d.RDB}

	// 后台任务
	bg := context.Background()
	billH.StartWatchdog(bg)
	d.Quota.StartDailyReconcile(bg)
	telH.StartDailyAggregate(bg)

	v1 := r.Group("/v1")

	// 🔓 无需登录
	v1.POST("/auth/qr", authH.CreateQr)
	v1.GET("/auth/qr/:state", authH.PollQr)
	v1.GET("/auth/wechat/callback", authH.QrCallback)
	v1.POST("/auth/wechat", authH.MobileLogin)
	v1.GET("/packs", billH.Packs)
	v1.POST("/pay/notify", billH.Notify)
	v1.POST("/metrics/batch", telH.Batch)
	v1.GET("/app/latest", userH.AppLatest)

	// 需登录
	authed := v1.Group("", d.JWT.Middleware())
	authed.POST("/auth/logout", authH.Logout)
	authed.GET("/me", userH.Me)
	authed.POST("/orders", billH.CreateOrder)
	authed.GET("/orders/:id", billH.OrderStatus)
	authed.POST("/feedback", fbH.Submit)
	authed.GET("/asr/stream", gwH.HandleWS)
}