package batch

import (
	"context"
	"encoding/json"
	"testing"

	"sub2api-cn-relay-manager/internal/probe"
	"sub2api-cn-relay-manager/internal/store/sqlite"
)

func TestBatchImport_StartRun(t *testing.T) {
	t.Parallel()

	t.Run("creates run items and backfills legacy linkage after provision", func(t *testing.T) {
		t.Parallel()

		runStore := &fakeRunStore{}
		itemStore := &fakeItemStore{}
		provisioner := &fakeProvisioner{
			provisionResult: ProvisionResult{
				LegacyBatchID:    int64Ptr(81),
				LegacyProviderID: "legacy-provider",
			},
		}

		service := BatchImportService{
			RunStore:  runStore,
			ItemStore: itemStore,
			ProbeModels: func(context.Context, string, string) (*probe.ModelsResult, error) {
				return &probe.ModelsResult{RawModels: []string{"deepseek-ai/DeepSeek-V4-Pro"}}, nil
			},
			ProbeCapabilities: func(context.Context, string, string, []string) (*probe.CapabilityProfile, error) {
				return &probe.CapabilityProfile{
					TransportProfile: probe.TransportProfile{SupportsOpenAIChatCompletions: true},
					ModelProfiles: []probe.ModelCapabilityProfile{
						{RawModelID: "deepseek-ai/DeepSeek-V4-Pro", CanonicalModelFamily: "deepseek-v4-pro", SmokeChatOK: true},
					},
				}, nil
			},
			InspectReuse: func(context.Context, ReuseLookupInput) (ReuseLookupResult, error) {
				return ReuseLookupResult{}, nil
			},
			Provisioner: provisioner,
		}

		result, err := service.StartRun(context.Background(), BatchImportRunRequest{
			RunID:       "run-1",
			Mode:        "strict",
			AccessMode:  "subscription",
			HostID:      "host-1",
			HostBaseURL: "https://relay.example.com",
			Entries: []BatchImportEntry{
				{BaseURL: "https://api.deepseek.com/v1", APIKey: "sk-live", RequestedModels: []string{"DeepSeek V4 Pro"}},
			},
		})
		if err != nil {
			t.Fatalf("StartRun() error = %v", err)
		}
		if result.RunID != "run-1" {
			t.Fatalf("RunID = %q, want run-1", result.RunID)
		}
		if len(runStore.created) != 1 || runStore.created[0].RunID != "run-1" {
			t.Fatalf("created runs = %#v, want run-1 persisted", runStore.created)
		}
		if provisioner.provisionCalls != 1 {
			t.Fatalf("provision calls = %d, want 1", provisioner.provisionCalls)
		}
		if len(itemStore.upserts) != 2 {
			t.Fatalf("item upserts = %d, want initial + final", len(itemStore.upserts))
		}

		finalItem := itemStore.upserts[len(itemStore.upserts)-1]
		if finalItem.LegacyBatchID == nil || *finalItem.LegacyBatchID != 81 {
			t.Fatalf("LegacyBatchID = %#v, want 81", finalItem.LegacyBatchID)
		}
		if finalItem.LegacyProviderID != "legacy-provider" {
			t.Fatalf("LegacyProviderID = %q, want legacy-provider", finalItem.LegacyProviderID)
		}
		if finalItem.CurrentStage != string(ItemStageConfirm) {
			t.Fatalf("CurrentStage = %q, want confirm", finalItem.CurrentStage)
		}
	})

	t.Run("active duplicate account is reused without provision", func(t *testing.T) {
		t.Parallel()

		providerID := NormalizeProviderID("https://api.kimi.com/v1")
		itemStore := &fakeItemStore{}
		provisioner := &fakeProvisioner{}
		service := BatchImportService{
			RunStore:    &fakeRunStore{},
			ItemStore:   itemStore,
			Provisioner: provisioner,
			ProbeModels: func(context.Context, string, string) (*probe.ModelsResult, error) {
				return &probe.ModelsResult{RawModels: []string{"kimi-k2.6"}}, nil
			},
			ProbeCapabilities: func(context.Context, string, string, []string) (*probe.CapabilityProfile, error) {
				return &probe.CapabilityProfile{
					ModelProfiles: []probe.ModelCapabilityProfile{{RawModelID: "kimi-k2.6", CanonicalModelFamily: "kimi-2.6", SmokeChatOK: true}},
				}, nil
			},
			InspectReuse: func(context.Context, ReuseLookupInput) (ReuseLookupResult, error) {
				return ReuseLookupResult{
					ExistingProviderID:       providerID,
					ExistingAccessStatus:     AccessStatusActive,
					ExistingCanonicalFamilys: []string{"kimi 2.6"},
					MatchedAccountID:         201,
					MatchedAccountState:      MatchedAccountStateActive,
				}, nil
			},
		}

		_, err := service.StartRun(context.Background(), BatchImportRunRequest{
			RunID:      "run-2",
			Mode:       "strict",
			AccessMode: "subscription",
			HostID:     "host-1",
			Entries: []BatchImportEntry{
				{BaseURL: "https://api.kimi.com/v1", APIKey: "sk-live", RequestedModels: []string{"kimi 2.6"}},
			},
		})
		if err != nil {
			t.Fatalf("StartRun() error = %v", err)
		}
		if provisioner.provisionCalls != 0 {
			t.Fatalf("provision calls = %d, want 0", provisioner.provisionCalls)
		}

		finalItem := itemStore.upserts[len(itemStore.upserts)-1]
		if !finalItem.ProvisionReused {
			t.Fatal("ProvisionReused = false, want true")
		}
		if finalItem.MatchedAccountState != string(MatchedAccountStateActive) {
			t.Fatalf("MatchedAccountState = %q, want active", finalItem.MatchedAccountState)
		}
		if finalItem.AccountResolution != string(AccountResolutionReused) {
			t.Fatalf("AccountResolution = %q, want reused", finalItem.AccountResolution)
		}
	})

	t.Run("deprecated duplicate account becomes reactivated", func(t *testing.T) {
		t.Parallel()

		providerID := NormalizeProviderID("https://api.kimi.com/v1")
		itemStore := &fakeItemStore{}
		service := BatchImportService{
			RunStore:    &fakeRunStore{},
			ItemStore:   itemStore,
			Provisioner: &fakeProvisioner{},
			ProbeModels: func(context.Context, string, string) (*probe.ModelsResult, error) {
				return &probe.ModelsResult{RawModels: []string{"kimi-k2.6"}}, nil
			},
			ProbeCapabilities: func(context.Context, string, string, []string) (*probe.CapabilityProfile, error) {
				return &probe.CapabilityProfile{
					ModelProfiles: []probe.ModelCapabilityProfile{{RawModelID: "kimi-k2.6", CanonicalModelFamily: "kimi-2.6", SmokeChatOK: true}},
				}, nil
			},
			InspectReuse: func(context.Context, ReuseLookupInput) (ReuseLookupResult, error) {
				return ReuseLookupResult{
					ExistingProviderID:       providerID,
					ExistingAccessStatus:     AccessStatusActive,
					ExistingCanonicalFamilys: []string{"kimi-2.6"},
					MatchedAccountID:         301,
					MatchedAccountState:      MatchedAccountStateDeprecated,
				}, nil
			},
		}

		_, err := service.StartRun(context.Background(), BatchImportRunRequest{
			RunID:      "run-3",
			Mode:       "strict",
			AccessMode: "subscription",
			HostID:     "host-1",
			Entries: []BatchImportEntry{
				{BaseURL: "https://api.kimi.com/v1", APIKey: "sk-live", RequestedModels: []string{"kimi 2.6"}},
			},
		})
		if err != nil {
			t.Fatalf("StartRun() error = %v", err)
		}

		finalItem := itemStore.upserts[len(itemStore.upserts)-1]
		if finalItem.AccountResolution != string(AccountResolutionReactivated) {
			t.Fatalf("AccountResolution = %q, want reactivated", finalItem.AccountResolution)
		}
		if !finalItem.ProvisionReused {
			t.Fatal("ProvisionReused = false, want true")
		}
	})

	t.Run("same family new alias only patches mapping", func(t *testing.T) {
		t.Parallel()

		providerID := NormalizeProviderID("https://api.kimi.com/v1")
		itemStore := &fakeItemStore{}
		provisioner := &fakeProvisioner{}
		service := BatchImportService{
			RunStore:    &fakeRunStore{},
			ItemStore:   itemStore,
			Provisioner: provisioner,
			ProbeModels: func(context.Context, string, string) (*probe.ModelsResult, error) {
				return &probe.ModelsResult{RawModels: []string{"Kimi-K2.6"}}, nil
			},
			ProbeCapabilities: func(context.Context, string, string, []string) (*probe.CapabilityProfile, error) {
				return &probe.CapabilityProfile{
					ModelProfiles: []probe.ModelCapabilityProfile{{RawModelID: "Kimi-K2.6", CanonicalModelFamily: "kimi-2.6", SmokeChatOK: true}},
				}, nil
			},
			InspectReuse: func(context.Context, ReuseLookupInput) (ReuseLookupResult, error) {
				return ReuseLookupResult{
					ExistingProviderID:       providerID,
					ExistingAccessStatus:     AccessStatusActive,
					ExistingCanonicalFamilys: []string{"kimi 2.6"},
					MatchedAccountID:         401,
					MatchedAccountState:      MatchedAccountStateActive,
					ExistingModelMapping:     map[string]string{"kimi-k2.6": "kimi-2.6"},
				}, nil
			},
		}

		_, err := service.StartRun(context.Background(), BatchImportRunRequest{
			RunID:      "run-4",
			Mode:       "strict",
			AccessMode: "subscription",
			HostID:     "host-1",
			Entries: []BatchImportEntry{
				{BaseURL: "https://api.kimi.com/v1", APIKey: "sk-live", RequestedModels: []string{"kimi 2.6"}},
			},
		})
		if err != nil {
			t.Fatalf("StartRun() error = %v", err)
		}
		if provisioner.provisionCalls != 0 {
			t.Fatalf("provision calls = %d, want 0", provisioner.provisionCalls)
		}
		if provisioner.patchCalls != 1 {
			t.Fatalf("patch calls = %d, want 1", provisioner.patchCalls)
		}
		if provisioner.lastPatch.Contract.ModelMapping["Kimi-K2.6"] != "kimi-2.6" {
			t.Fatalf("patch mapping = %#v, want raw alias mapped to canonical family", provisioner.lastPatch.Contract.ModelMapping)
		}

		finalItem := itemStore.upserts[len(itemStore.upserts)-1]
		if !finalItem.ProvisionReused {
			t.Fatal("ProvisionReused = false, want true for patch-only flow")
		}
	})

	t.Run("probe failure marks run failed instead of leaving running half state", func(t *testing.T) {
		t.Parallel()

		runStore := &fakeRunStore{}
		itemStore := &fakeItemStore{}
		service := BatchImportService{
			RunStore:  runStore,
			ItemStore: itemStore,
			ProbeModels: func(context.Context, string, string) (*probe.ModelsResult, error) {
				return nil, context.DeadlineExceeded
			},
			ProbeCapabilities: func(context.Context, string, string, []string) (*probe.CapabilityProfile, error) {
				t.Fatal("ProbeCapabilities should not be called after probe failure")
				return nil, nil
			},
		}

		result, err := service.StartRun(context.Background(), BatchImportRunRequest{
			RunID:      "run-probe-fail",
			Mode:       "strict",
			AccessMode: "self_service",
			HostID:     "host-1",
			Entries: []BatchImportEntry{
				{BaseURL: "https://api.deepseek.com/v1", APIKey: "sk-live", RequestedModels: []string{"DeepSeek V4 Pro"}},
			},
		})
		if err != nil {
			t.Fatalf("StartRun() error = %v, want persisted failed run without transport error", err)
		}
		if result.RunID != "run-probe-fail" {
			t.Fatalf("result.RunID = %q, want run-probe-fail", result.RunID)
		}
		if len(runStore.updated) == 0 {
			t.Fatal("run store was not updated to failed state")
		}
		gotRun := runStore.updated[len(runStore.updated)-1]
		if gotRun.State != string(RunStateFailed) {
			t.Fatalf("run.State = %q, want failed", gotRun.State)
		}
		if gotRun.CompletedItems != 1 || gotRun.BrokenItems != 1 {
			t.Fatalf("run counters = %+v, want completed_items=1 broken_items=1", gotRun)
		}
		if len(itemStore.upserts) < 2 {
			t.Fatalf("item upserts = %d, want initial + failed terminal state", len(itemStore.upserts))
		}
		gotItem := itemStore.upserts[len(itemStore.upserts)-1]
		if gotItem.CurrentStage != string(ItemStageDone) {
			t.Fatalf("item.CurrentStage = %q, want done", gotItem.CurrentStage)
		}
		if gotItem.ConfirmationStatus != string(ConfirmationFailed) {
			t.Fatalf("item.ConfirmationStatus = %q, want failed", gotItem.ConfirmationStatus)
		}
		if gotItem.AccessStatus != string(AccessStatusBroken) {
			t.Fatalf("item.AccessStatus = %q, want broken", gotItem.AccessStatus)
		}
		if gotItem.LastErrorStage != string(ItemStageProbe) {
			t.Fatalf("item.LastErrorStage = %q, want probe", gotItem.LastErrorStage)
		}
	})
}

type fakeRunStore struct {
	created []sqlite.ImportRun
	updated []sqlite.ImportRun
}

func (f *fakeRunStore) Create(ctx context.Context, run sqlite.ImportRun) error {
	f.created = append(f.created, run)
	return nil
}

func (f *fakeRunStore) Update(ctx context.Context, run sqlite.ImportRun) error {
	f.updated = append(f.updated, run)
	return nil
}

type fakeItemStore struct {
	upserts []sqlite.ImportRunItem
}

func (f *fakeItemStore) Upsert(ctx context.Context, item sqlite.ImportRunItem) error {
	f.upserts = append(f.upserts, item)
	return nil
}

type fakeProvisioner struct {
	provisionCalls  int
	patchCalls      int
	provisionResult ProvisionResult
	lastPatch       PatchProvisionRequest
}

func (f *fakeProvisioner) Provision(ctx context.Context, req ProvisionRequest) (ProvisionResult, error) {
	f.provisionCalls++
	return f.provisionResult, nil
}

func (f *fakeProvisioner) Patch(ctx context.Context, req PatchProvisionRequest) error {
	f.patchCalls++
	f.lastPatch = req
	return nil
}

func int64Ptr(value int64) *int64 {
	return &value
}

func mustJSON(t *testing.T, value any) string {
	t.Helper()

	payload, err := json.Marshal(value)
	if err != nil {
		t.Fatalf("json.Marshal() error = %v", err)
	}
	return string(payload)
}