package services

import (
	"encoding/json"
	"os"
	"strings"
	"testing"

	"fwh-toolbox-server/domain"
)

const deviceInfoHar = "../../docs/fault-record/设备信息.test.franklinwh.com.har"

// 从 HAR 中取出指定接口的 result
func harResult[T any](t *testing.T, api string) *T {
	t.Helper()
	b, err := os.ReadFile(deviceInfoHar)
	if err != nil {
		t.Skipf("har not found: %v", err)
	}
	var har struct {
		Log struct {
			Entries []struct {
				Request  struct{ URL string } `json:"request"`
				Response struct {
					Content struct{ Text string } `json:"content"`
				} `json:"response"`
			} `json:"entries"`
		} `json:"log"`
	}
	if err := json.Unmarshal(b, &har); err != nil {
		t.Fatal(err)
	}
	for _, e := range har.Log.Entries {
		if strings.Contains(e.Request.URL, "/manage/"+api) {
			var res domain.FwhResponse[T]
			if err := json.Unmarshal([]byte(e.Response.Content.Text), &res); err != nil {
				t.Fatal(err)
			}
			return res.Result
		}
	}
	t.Fatalf("%s not in har", api)
	return nil
}

func TestBuildFaultRecordDevicesFromHar(t *testing.T) {
	devInfo := harResult[domain.FwhDeviceInfo](t, "getDeviceInfo")
	power := harResult[domain.FwhGatewayPower](t, "selectGatewayPower")

	got := BuildFaultRecordDevices("10070052S00X25150083", devInfo, power)
	var lines []string
	for _, d := range got {
		ver := -1
		if d.HwVer != nil {
			ver = *d.HwVer
		}
		lines = append(lines, d.Kind+"|"+d.Sn+"|"+d.Model+"|"+map[bool]string{true: "ok", false: "pending"}[d.Supported]+"|"+string(rune('0'+ver%10)))
		t.Logf("%-10s %-22s %-9s type=%-5q supported=%v hwVer=%d", d.Kind, d.Sn, d.Model, d.Type, d.Supported, ver)
	}
	want := []string{
		"aGate|10070052S00X25150083||ok",
		"aPowerPE|10050015S00W24240002|aPower 2|ok",
		"aPowerPE|10050019S01X25350643|aPower S|ok",
		"aPowerMPPT|10050019S01X25350643|aPower S|ok", // 版本 21 支持 MPPT
		"aHub|10070053S00X25270092||ok",
	}
	if len(got) != len(want) {
		t.Fatalf("devices = %d, want %d", len(got), len(want))
	}
	for i, w := range want {
		if !strings.HasPrefix(lines[i], w) {
			t.Errorf("device %d = %s, want prefix %s", i, lines[i], w)
		}
	}
}

func TestBuildFaultRecordDevicesFallback(t *testing.T) {
	// getDeviceInfo 失败时退回站点信息的 fhpSn：没有硬件版本，不生成 aPower-MPPT
	got := BuildFaultRecordDevices("GW", &domain.FwhDeviceInfo{FhpSn: "A1, A2"}, nil)
	if len(got) != 3 || got[1].Sn != "A1" || got[2].Sn != "A2" || got[2].HwVer != nil {
		t.Fatalf("devices = %+v", got)
	}
}