package service

import (
	"context"
	"os"
	"testing"

	"stock-analysis/internal/model"
	"stock-analysis/internal/storage/sqlite"
)

type testMailer struct {
	lastEmail string
	lastCode  string
}

func (m *testMailer) SendCode(email, code string) error {
	m.lastEmail = email
	m.lastCode = code
	return nil
}

func TestAuthService(t *testing.T) {
	ctx := context.Background()
	dbPath := "test_auth.db"
	_ = os.Remove(dbPath)
	defer os.Remove(dbPath)

	store, err := sqlite.Open(dbPath)
	if err != nil {
		t.Fatalf("open sqlite: %v", err)
	}
	defer store.Close()

	svc := NewAuthService(store)
	mailer := &testMailer{}
	svc.SetMailer(mailer)

	email := "Test@Example.COM "
	normalized := "test@example.com"
	username := "testuser"

	// 1. 发送注册验证码
	if err := svc.SendVerifyCode(ctx, email, "register"); err != nil {
		t.Fatalf("send register code: %v", err)
	}
	if mailer.lastEmail != normalized {
		t.Fatalf("email not normalized: got %s want %s", mailer.lastEmail, normalized)
	}
	if len(mailer.lastCode) != 6 {
		t.Fatalf("code length invalid: %s", mailer.lastCode)
	}

	// 2. 验证码注册（含用户名）
	u, err := svc.Register(ctx, username, email, mailer.lastCode, "123456")
	if err != nil {
		t.Fatalf("register: %v", err)
	}
	if u.Email != normalized {
		t.Fatalf("registered email: got %s want %s", u.Email, normalized)
	}
	if u.Username != username {
		t.Fatalf("registered username: got %s want %s", u.Username, username)
	}

	// 3. 重复注册应失败
	if _, err := svc.Register(ctx, username, email, mailer.lastCode, "123456"); err == nil {
		t.Fatal("duplicate register should fail")
	}

	// 4. 发送登录验证码
	if err := svc.SendVerifyCode(ctx, email, "login"); err != nil {
		t.Fatalf("send login code: %v", err)
	}

	// 5. 验证码登录
	logged, token, err := svc.Login(ctx, email, mailer.lastCode)
	if err != nil {
		t.Fatalf("login: %v", err)
	}
	if logged.ID != u.ID {
		t.Fatal("login user id mismatch")
	}
	if token == "" {
		t.Fatal("login token empty")
	}

	// 6. 用户名+密码登录
	logged2, token2, err := svc.LoginByUsername(ctx, username, "123456")
	if err != nil {
		t.Fatalf("login by username: %v", err)
	}
	if logged2.ID != u.ID {
		t.Fatal("username login user id mismatch")
	}
	if token2 == "" {
		t.Fatal("username login token empty")
	}

	// 7. token 校验
	validated, err := svc.ValidateToken(ctx, token2)
	if err != nil {
		t.Fatalf("validate token: %v", err)
	}
	if validated.ID != u.ID {
		t.Fatal("validated user id mismatch")
	}

	// 8. 退出后 token 失效
	svc.Logout(token2)
	if _, err := svc.ValidateToken(ctx, token2); err == nil {
		t.Fatal("token should be invalid after logout")
	}

	// 9. 密码错误
	if _, _, err := svc.LoginByUsername(ctx, username, "wrong"); err == nil {
		t.Fatal("wrong password should fail")
	}

	// 10. 验证码过期/错误
	if _, _, err := svc.Login(ctx, email, "000000"); err == nil {
		t.Fatal("used/wrong code should fail")
	}

	// 11. 不存在用户
	if _, _, err := svc.Login(ctx, "notfound@example.com", "123456"); err == nil {
		t.Fatal("nonexistent user should fail")
	}

	// 12. EnsureAdmin 创建 admin
	if err := svc.EnsureAdmin(ctx); err != nil {
		t.Fatalf("ensure admin: %v", err)
	}
	// 第二次调用应不报错（幂等）
	if err := svc.EnsureAdmin(ctx); err != nil {
		t.Fatalf("ensure admin idempotent: %v", err)
	}
	// admin 可以登录
	admin, adminToken, err := svc.LoginByUsername(ctx, "admin", "123456")
	if err != nil {
		t.Fatalf("admin login: %v", err)
	}
	if admin.Username != "admin" {
		t.Fatal("admin username mismatch")
	}
	if adminToken == "" {
		t.Fatal("admin token empty")
	}

	// 验证 model 类型
	_ = model.User{}
	_ = model.VerifyCode{}
}