package testenv

import (
	"encoding/json"
	"io"
	"net/http"
	"testing"
	"time"

	"gcy_hpc_server/internal/model"
	"gcy_hpc_server/internal/storage"
)

func TestNewTestEnv(t *testing.T) {
	env := NewTestEnv(t)
	defer func() {
		env.taskSvc.StopProcessor()
		env.poller.Stop()
		env.srv.Close()
	}()

	if env.DB == nil {
		t.Fatal("DB is nil")
	}
	if env.MockSlurm == nil {
		t.Fatal("MockSlurm is nil")
	}
	if env.MockMinIO == nil {
		t.Fatal("MockMinIO is nil")
	}
	if env.srv == nil {
		t.Fatal("srv is nil")
	}

	resp, err := http.Get(env.srv.URL + "/api/v1/applications")
	if err != nil {
		t.Fatalf("GET /api/v1/applications: %v", err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("expected 200, got %d", resp.StatusCode)
	}
}

func TestAllRoutesRegistered(t *testing.T) {
	env := NewTestEnv(t)

	routes := []struct {
		method string
		path   string
	}{
		{"POST", "/api/v1/jobs/submit"},
		{"GET", "/api/v1/jobs"},
		{"GET", "/api/v1/jobs/history"},
		{"GET", "/api/v1/jobs/1"},
		{"DELETE", "/api/v1/jobs/1"},
		{"GET", "/api/v1/nodes"},
		{"GET", "/api/v1/nodes/node01"},
		{"GET", "/api/v1/partitions"},
		{"GET", "/api/v1/partitions/normal"},
		{"GET", "/api/v1/diag"},
		{"GET", "/api/v1/applications"},
		{"POST", "/api/v1/applications"},
		{"GET", "/api/v1/applications/1"},
		{"PUT", "/api/v1/applications/1"},
		{"DELETE", "/api/v1/applications/1"},
		// {"POST", "/api/v1/applications/1/submit"}, // [已禁用] 已被 POST /tasks 取代
		{"POST", "/api/v1/files/uploads"},
		{"GET", "/api/v1/files/uploads/1"},
		{"PUT", "/api/v1/files/uploads/1/chunks/0"},
		{"POST", "/api/v1/files/uploads/1/complete"},
		{"DELETE", "/api/v1/files/uploads/1"},
		{"GET", "/api/v1/files"},
		{"GET", "/api/v1/files/1"},
		{"GET", "/api/v1/files/1/download"},
		{"DELETE", "/api/v1/files/1"},
		{"POST", "/api/v1/files/folders"},
		{"GET", "/api/v1/files/folders"},
		{"GET", "/api/v1/files/folders/1"},
		{"DELETE", "/api/v1/files/folders/1"},
		{"POST", "/api/v1/tasks"},
		{"GET", "/api/v1/tasks"},
	}

	if len(routes) != 30 {
		t.Fatalf("expected 31 routes, got %d", len(routes))
	}

	for _, r := range routes {
		req, err := http.NewRequest(r.method, env.srv.URL+r.path, nil)
		if err != nil {
			t.Fatalf("%s %s: create request: %v", r.method, r.path, err)
		}
		resp, err := http.DefaultClient.Do(req)
		if err != nil {
			t.Fatalf("%s %s: %v", r.method, r.path, err)
		}
		body, _ := io.ReadAll(resp.Body)
		resp.Body.Close()

		// Gin returns 404 for unregistered routes WITHOUT a JSON body.
		// Handler-level 404s return JSON with {"success":false,...}.
		// So a 404 that decodes as valid JSON means the route IS registered.
		if resp.StatusCode == http.StatusNotFound {
			var apiResp struct {
				Success bool `json:"success"`
			}
			if json.Unmarshal(body, &apiResp) != nil {
				t.Errorf("%s %s: got router-level 404 (route not registered)", r.method, r.path)
			}
		}
	}
}

func TestMakeTaskStale(t *testing.T) {
	env := NewTestEnv(t)

	ctx := t.Context()
	task := &model.Task{
		TaskName: "stale-test",
		AppID:    1,
		AppName:  "test-app",
		Status:   model.TaskStatusSubmitted,
	}
	taskID, err := env.taskStore.Create(ctx, task)
	if err != nil {
		t.Fatalf("create task: %v", err)
	}

	before := time.Now()
	if err := env.MakeTaskStale(taskID); err != nil {
		t.Fatalf("MakeTaskStale: %v", err)
	}

	updated, err := env.taskStore.GetByID(ctx, taskID)
	if err != nil {
		t.Fatalf("get task: %v", err)
	}
	if !updated.UpdatedAt.Before(before.Add(-25 * time.Second)) {
		t.Errorf("expected updated_at to be >25s in the past, got %v (before=%v)", updated.UpdatedAt, before)
	}
}

func TestUploadTestData(t *testing.T) {
	env := NewTestEnv(t)

	content := []byte("hello testenv")
	fileID, blobID := env.UploadTestData("test.txt", content)

	if fileID == 0 {
		t.Fatal("fileID is 0")
	}
	if blobID == 0 {
		t.Fatal("blobID is 0")
	}

	ctx := t.Context()
	file, err := env.fileStore.GetByID(ctx, fileID)
	if err != nil {
		t.Fatalf("get file: %v", err)
	}
	if file == nil {
		t.Fatal("file not found")
	}
	if file.Name != "test.txt" {
		t.Errorf("expected name 'test.txt', got %q", file.Name)
	}

	blob, err := env.blobStore.GetBySHA256(ctx, file.BlobSHA256)
	if err != nil {
		t.Fatalf("get blob: %v", err)
	}
	if blob == nil {
		t.Fatal("blob not found")
	}
	if blob.FileSize != int64(len(content)) {
		t.Errorf("expected size %d, got %d", len(content), blob.FileSize)
	}

	obj, info, err := env.MockMinIO.GetObject(ctx, "files", blob.MinioKey, storage.GetOptions{})
	if err != nil {
		t.Fatalf("get object: %v", err)
	}
	defer obj.Close()
	got, _ := io.ReadAll(obj)
	if string(got) != string(content) {
		t.Errorf("expected content %q, got %q", content, got)
	}
	if info.Size != int64(len(content)) {
		t.Errorf("expected object size %d, got %d", len(content), info.Size)
	}
}

func TestCreateApp(t *testing.T) {
	env := NewTestEnv(t)

	params := json.RawMessage(`[{"name":"cores","type":"integer","required":true}]`)
	appID, err := env.CreateApp("test-app", "#!/bin/bash\necho hello", params)
	if err != nil {
		t.Fatalf("CreateApp: %v", err)
	}
	if appID == 0 {
		t.Fatal("appID is 0")
	}

	ctx := t.Context()
	app, err := env.appStore.GetByID(ctx, appID)
	if err != nil {
		t.Fatalf("get app: %v", err)
	}
	if app == nil {
		t.Fatal("app not found")
	}
	if app.Name != "test-app" {
		t.Errorf("expected name 'test-app', got %q", app.Name)
	}
}

func TestDoRequest_SetsJSONContentType(t *testing.T) {
	env := NewTestEnv(t)

	resp := env.DoRequest("POST", "/api/v1/applications", nil)
	defer resp.Body.Close()
	if resp.StatusCode == 0 {
		t.Fatal("no status code")
	}
}

func TestDecodeResponse(t *testing.T) {
	env := NewTestEnv(t)

	resp := env.DoRequest("GET", "/api/v1/applications", nil)
	defer resp.Body.Close()

	success, data, err := env.DecodeResponse(resp)
	if err != nil {
		t.Fatalf("DecodeResponse: %v", err)
	}
	if !success {
		t.Error("expected success=true for list applications")
	}
	if data == nil {
		t.Error("expected non-nil data")
	}
}