package service

import (
	"context"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/topfans/backend/pkg/models"
)

// fakeRepo 是 appDownloadRepo 的 in-memory fake 实现
type fakeRepo struct {
	configs []models.AppDownloadConfig
}

func (f *fakeRepo) FindByType(ctx context.Context, pkgType string) ([]models.AppDownloadConfig, error) {
	var result []models.AppDownloadConfig
	for _, c := range f.configs {
		if c.Type == pkgType {
			result = append(result, c)
		}
	}
	return result, nil
}

func (f *fakeRepo) UpsertAll(ctx context.Context, configs []models.AppDownloadConfig) error {
	for _, incoming := range configs {
		found := false
		for i, existing := range f.configs {
			if existing.Platform == incoming.Platform && existing.Type == incoming.Type {
				f.configs[i].DownloadURL = incoming.DownloadURL
				f.configs[i].Version = incoming.Version
				f.configs[i].UpdatedAt = incoming.UpdatedAt
				found = true
				break
			}
		}
		if !found {
			f.configs = append(f.configs, incoming)
		}
	}
	return nil
}

func TestGetAllNativeApp_FiltersWgt(t *testing.T) {
	svc := &AppDownloadService{
		repo: &fakeRepo{configs: []models.AppDownloadConfig{
			{Platform: "android", Type: "native_app", DownloadURL: "https://app.apk"},
			{Platform: "android", Type: "wgt", DownloadURL: "https://wgt.wgt"},
		}},
	}

	configs, err := svc.GetAllNativeApp(context.Background())
	assert.NoError(t, err)
	assert.Len(t, configs, 1)
	assert.Equal(t, "native_app", configs[0].Type)
}

func TestGetAllNativeApp_Empty(t *testing.T) {
	svc := &AppDownloadService{
		repo: &fakeRepo{},
	}

	configs, err := svc.GetAllNativeApp(context.Background())
	assert.NoError(t, err)
	assert.Len(t, configs, 0)
}

func TestSyncVersion_BothPlatforms(t *testing.T) {
	fake := &fakeRepo{}
	svc := &AppDownloadService{repo: fake}

	err := svc.SyncVersion(context.Background(), &SyncVersionRequest{
		Android: &PlatformVersionInfo{URL: "https://a.apk", Version: "1.0.5", Type: "native_app"},
		IOS:     &PlatformVersionInfo{URL: "https://apps.apple.com/...", Version: "1.0.5", Type: "native_app"},
	})
	assert.NoError(t, err)
	assert.Len(t, fake.configs, 2)
}

func TestSyncVersion_PartialUpdate(t *testing.T) {
	fake := &fakeRepo{
		configs: []models.AppDownloadConfig{
			{Platform: "android", Type: "native_app", DownloadURL: "https://old.apk", Version: "1.0.0"},
		},
	}
	svc := &AppDownloadService{repo: fake}

	// 只更新 android，不传 ios
	err := svc.SyncVersion(context.Background(), &SyncVersionRequest{
		Android: &PlatformVersionInfo{URL: "https://new.apk", Version: "2.0.0", Type: "native_app"},
	})
	assert.NoError(t, err)
	assert.Len(t, fake.configs, 1) // 仍然是 1 条
	assert.Equal(t, "https://new.apk", fake.configs[0].DownloadURL)
	assert.Equal(t, "2.0.0", fake.configs[0].Version)
}

func TestSyncVersion_NilPlatform(t *testing.T) {
	fake := &fakeRepo{}
	svc := &AppDownloadService{repo: fake}

	// 只传 iOS，android 为 nil
	err := svc.SyncVersion(context.Background(), &SyncVersionRequest{
		IOS: &PlatformVersionInfo{URL: "https://apps.apple.com/...", Version: "1.0.5", Type: "native_app"},
	})
	assert.NoError(t, err)
	assert.Len(t, fake.configs, 1)
	assert.Equal(t, "ios", fake.configs[0].Platform)
}