package main

import (
	"errors"
	"log"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/glebarez/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"

	"github.com/wangjia/pay/config"
	"github.com/wangjia/pay/internal/channel"
	"github.com/wangjia/pay/internal/model"
	"github.com/wangjia/pay/internal/router"
)

func main() {
	config.Load()

	db := initDB()
	autoMigrate(db)
	seed(db)

	reg := channel.NewRegistry(db)

	gin.SetMode(config.C.Server.Mode)
	r := gin.New()
	r.Use(gin.Logger(), gin.Recovery())

	orderSvc := router.Setup(r, db, reg)

	if config.C.QuerySync.Enabled {
		orderSvc.StartQuerySync(
			time.Duration(config.C.QuerySync.IntervalSec)*time.Second,
			time.Duration(config.C.QuerySync.MaxAgeMin)*time.Minute,
		)
		log.Printf("查单兜底已启动：每 %ds 一次", config.C.QuerySync.IntervalSec)
	}

	addr := ":" + config.C.Server.Port
	log.Printf("支付服务启动 %s (mode=%s, base_url=%s)", addr, config.C.Server.Mode, config.C.Server.BaseURL)
	if err := r.Run(addr); err != nil {
		log.Fatalf("启动失败: %v", err)
	}
}

func initDB() *gorm.DB {
	logLevel := logger.Silent
	if config.C.Server.Mode == "debug" {
		logLevel = logger.Info
	}
	gormCfg := &gorm.Config{Logger: logger.Default.LogMode(logLevel), TranslateError: true}

	switch config.C.Database.Driver {
	case "sqlite", "":
		db, err := gorm.Open(sqlite.Open(config.C.Database.DSN), gormCfg)
		if err != nil {
			log.Fatalf("连接 sqlite 失败: %v", err)
		}
		return db
	case "mysql":
		log.Fatal("mysql 驱动尚未启用：go get gorm.io/driver/mysql 后在 initDB 接入")
		return nil
	default:
		log.Fatalf("未知 database.driver: %s", config.C.Database.Driver)
		return nil
	}
}

func autoMigrate(db *gorm.DB) {
	if err := db.AutoMigrate(
		&model.Merchant{},
		&model.Product{},
		&model.Order{},
		&model.NotifyLog{},
	); err != nil {
		log.Fatalf("自动迁移失败: %v", err)
	}
	log.Println("AutoMigrate 完成")
}

// seed 据 config 的 alipay_sandbox upsert 一个支付宝商户，并为其补两个测试套餐。
func seed(db *gorm.DB) {
	sb := config.C.AlipaySandbox
	if !sb.Enabled {
		log.Println("[seed] alipay_sandbox.enabled=false，跳过沙箱商户初始化")
		return
	}
	var m model.Merchant
	err := db.Where("code = ?", sb.MerchantCode).First(&m).Error
	if errors.Is(err, gorm.ErrRecordNotFound) {
		m = model.Merchant{
			Code:    sb.MerchantCode,
			Name:    sb.MerchantName,
			Channel: "alipay",
		}
	} else if err != nil {
		log.Fatalf("[seed] 查询商户失败: %v", err)
	}
	m.Production = sb.Production
	m.Enabled = true
	m.AppID = sb.AppID
	m.AppPrivateKey = sb.AppPrivateKey
	m.AlipayPublicKey = sb.AlipayPublicKey
	if err := db.Save(&m).Error; err != nil {
		log.Fatalf("[seed] 保存商户失败: %v", err)
	}
	log.Printf("[seed] 支付宝沙箱商户就绪: code=%s app_id=%s", m.Code, m.AppID)

	var cnt int64
	db.Model(&model.Product{}).Where("merchant_id = ?", m.ID).Count(&cnt)
	if cnt == 0 {
		samples := []model.Product{
			{MerchantID: m.ID, Name: "测试套餐 A", Description: "沙箱联调用", Price: "0.01", Active: true, Sort: 1},
			{MerchantID: m.ID, Name: "测试套餐 B", Description: "沙箱联调用", Price: "0.02", Active: true, Sort: 2},
		}
		if err := db.Create(&samples).Error; err != nil {
			log.Fatalf("[seed] 创建测试套餐失败: %v", err)
		}
		log.Printf("[seed] 已为商户 %s 创建 %d 个测试套餐", m.Code, len(samples))
	}
}