package ckprompt

import (
	"context"
	"errors"
	"io"
	"reflect"
	"testing"

	"go.maximumdirect.net/ckconfig"
	commandkit "go.maximumdirect.net/commandkit"
	promptkit "go.maximumdirect.net/promptkit"
)

func TestNamespaceSelectionAndApplicability(t *testing.T) {
	var got *promptkit.Namespaces
	var id string
	suite := Suite[struct{}, struct{}]{
		InspectPrompt: func(_ context.Context, req PromptRequest, _, _ struct{}) (commandkit.Acquired[*promptkit.PromptInspection], error) {
			got, id = req.Namespaces, req.ID
			return commandkit.Acquired[*promptkit.PromptInspection]{Value: &promptkit.PromptInspection{}}, nil
		},
		InspectProfile: func(_ context.Context, req ProfileRequest, _, _ struct{}) (commandkit.Acquired[*promptkit.ProfileInspection], error) {
			got, id = req.Namespaces, req.ID
			return commandkit.Acquired[*promptkit.ProfileInspection]{Value: &promptkit.ProfileInspection{}}, nil
		},
		InspectBackend: func(_ context.Context, req BackendRequest, _, _ struct{}) (commandkit.Acquired[*promptkit.BackendInspection], error) {
			got, id = req.Namespaces, req.ID
			return commandkit.Acquired[*promptkit.BackendInspection]{Value: &promptkit.BackendInspection{}}, nil
		},
		InspectRequirements: func(_ context.Context, req RequirementsRequest, _, _ struct{}) (commandkit.Acquired[*promptkit.RequirementInspection], error) {
			got, id = req.Namespaces, req.Inspection.PromptID
			return commandkit.Acquired[*promptkit.RequirementInspection]{Value: &promptkit.RequirementInspection{}}, nil
		},
		ValidateRequest: func(_ context.Context, req ValidationRequest, _, _ struct{}) (commandkit.Acquired[struct{}], error) {
			got, id = req.Namespaces, req.Request.PromptID
			return commandkit.Acquired[struct{}]{}, nil
		},
		PrepareRequest: func(_ context.Context, req PreparationRequest, _, _ struct{}) (commandkit.Acquired[*promptkit.PreparedRun], error) {
			got, id = req.Namespaces, req.Request.PromptID
			return commandkit.Acquired[*promptkit.PreparedRun]{Value: &promptkit.PreparedRun{}}, nil
		},
		SmokeTest: func(_ context.Context, req SmokeRequest, _, _ struct{}) (commandkit.Acquired[*promptkit.SmokeTestReport], error) {
			got = req.Namespaces
			return commandkit.Acquired[*promptkit.SmokeTestReport]{Value: &promptkit.SmokeTestReport{}}, nil
		},
		ListPrompts: func(context.Context, CatalogRequest, struct{}, struct{}) (commandkit.Acquired[[]promptkit.PromptIdentity], error) {
			return commandkit.Acquired[[]promptkit.PromptIdentity]{}, nil
		},
	}
	defaults := promptkit.Namespaces{Prompt: "prompt-default", Profile: "profile-default", Backend: "backend-default"}
	app := newPromptTestApp(t, Command(WithNamespaces(suite, defaults)))
	tests := []struct {
		args               []string
		allowed, forbidden string
		expected           promptkit.Namespaces
	}{
		{[]string{"show", "prompt", "qualified/name"}, "--llm-prompt-namespace=", "--llm-profile-namespace=x", promptkit.Namespaces{Profile: defaults.Profile, Backend: defaults.Backend}},
		{[]string{"show", "profile", "qualified/name"}, "--llm-profile-namespace=other", "--llm-prompt-namespace=x", promptkit.Namespaces{Prompt: defaults.Prompt, Profile: "other", Backend: defaults.Backend}},
		{[]string{"show", "backend", "qualified/name"}, "--llm-backend-namespace=other", "--llm-profile-namespace=x", promptkit.Namespaces{Prompt: defaults.Prompt, Profile: defaults.Profile, Backend: "other"}},
		{[]string{"requirements", "show", "qualified/name"}, "--llm-profile-namespace=other", "--llm-backend-namespace=x", promptkit.Namespaces{Prompt: defaults.Prompt, Profile: "other", Backend: defaults.Backend}},
		{[]string{"requirements", "validate", "qualified/name"}, "--llm-backend-namespace=other", "--llm-prompt=invalid", promptkit.Namespaces{Prompt: defaults.Prompt, Profile: defaults.Profile, Backend: "other"}},
		{[]string{"show", "prepared", "qualified/name"}, "--llm-prompt-namespace=", "--llm-backend=invalid", promptkit.Namespaces{Profile: defaults.Profile, Backend: defaults.Backend}},
		{[]string{"test", "authentication"}, "--llm-backend-namespace=other", "--llm-session-id=invalid", promptkit.Namespaces{Prompt: defaults.Prompt, Profile: defaults.Profile, Backend: "other"}},
	}
	for _, test := range tests {
		got = nil
		id = ""
		args := append(append([]string{"promptkit"}, test.args...), test.allowed)
		result := app.Execute(context.Background(), args, commandkit.Streams{Out: io.Discard, Err: io.Discard})
		if result.Kind != commandkit.OutcomeSuccess || got == nil || *got != test.expected || (test.args[0] != "test" && id != "qualified/name") {
			t.Fatalf("%v: result=%#v got=%#v id=%q", args, result, got, id)
		}
		args = append(append([]string{"promptkit"}, test.args...), test.forbidden)
		if result := app.Execute(context.Background(), args, commandkit.Streams{Out: io.Discard, Err: io.Discard}); result.Kind != commandkit.OutcomeUsage {
			t.Fatalf("%v: %#v", args, result)
		}
	}
	unscoped := newPromptTestApp(t, Command(suite))
	result := unscoped.Execute(context.Background(), []string{"promptkit", "show", "prompt", "name"}, commandkit.Streams{Out: io.Discard, Err: io.Discard})
	if result.Kind != commandkit.OutcomeSuccess || got != nil {
		t.Fatalf("without option: %#v %#v", result, got)
	}
	result = unscoped.Execute(context.Background(), []string{"promptkit", "show", "prompt", "name", "--llm-prompt-namespace=x"}, commandkit.Streams{Out: io.Discard, Err: io.Discard})
	if result.Kind != commandkit.OutcomeUsage {
		t.Fatalf("unexpected flag without option: %#v", result)
	}
	result = app.Execute(context.Background(), []string{"promptkit", "list", "prompts", "--llm-prompt-namespace=x"}, commandkit.Streams{Out: io.Discard, Err: io.Discard})
	if result.Kind != commandkit.OutcomeUsage {
		t.Fatalf("namespace selection on catalog: %#v", result)
	}
}

func TestNativeNamespaceViewAndErrorForwarding(t *testing.T) {
	engine := adapterEngine(t)
	load := func(context.Context, ckconfig.Selection, struct{}, struct{}) (*promptkit.Engine, error) {
		return engine, nil
	}
	namespaces := promptkit.Namespaces{Prompt: "team"}
	view, err := engine.WithNamespaces(namespaces)
	if err != nil {
		t.Fatal(err)
	}
	want, err := view.InspectProfile(context.Background(), "default")
	if err != nil {
		t.Fatal(err)
	}
	suite := FromEngine(load)
	got, err := suite.InspectProfile(context.Background(), ProfileRequest{ID: "default", Namespaces: &namespaces}, struct{}{}, struct{}{})
	if err != nil || !reflect.DeepEqual(got.Value, want) {
		t.Fatalf("native view: %#v %v", got, err)
	}
	invalid := promptkit.Namespaces{Prompt: "invalid/name"}
	_, nativeErr := engine.WithNamespaces(invalid)
	_, err = suite.InspectProfile(context.Background(), ProfileRequest{ID: "default", Namespaces: &invalid}, struct{}{}, struct{}{})
	if nativeErr == nil || !errors.Is(err, promptkit.ErrInvalidConfig) {
		t.Fatalf("namespace error: native=%v forwarded=%v", nativeErr, err)
	}
	validation := WithRequestValidation(Suite[struct{}, struct{}]{}, load, nil)
	_, err = validation.ValidateRequest(context.Background(), ValidationRequest{Namespaces: &invalid}, struct{}{}, struct{}{})
	if !errors.Is(err, promptkit.ErrInvalidConfig) {
		t.Fatalf("validation namespace error: %v", err)
	}
	preparation := WithRequestPreparation(Suite[struct{}, struct{}]{}, load, nil)
	_, err = preparation.PrepareRequest(context.Background(), PreparationRequest{Namespaces: &invalid}, struct{}{}, struct{}{})
	if !errors.Is(err, promptkit.ErrInvalidConfig) {
		t.Fatalf("preparation namespace error: %v", err)
	}
	smoke := WithSmokeTesting(Suite[struct{}, struct{}]{}, load, nil)
	_, err = smoke.SmokeTest(context.Background(), SmokeRequest{Namespaces: &invalid}, struct{}{}, struct{}{})
	if !errors.Is(err, promptkit.ErrInvalidConfig) {
		t.Fatalf("smoke namespace error: %v", err)
	}
	preexisting, err := engine.WithNamespaces(promptkit.Namespaces{Profile: "other"})
	if err != nil {
		t.Fatal(err)
	}
	_, nativeErr = preexisting.InspectProfile(context.Background(), "default")
	custom := FromEngine(func(context.Context, ckconfig.Selection, struct{}, struct{}) (*promptkit.Engine, error) {
		return preexisting, nil
	})
	_, err = custom.InspectProfile(context.Background(), ProfileRequest{ID: "default"}, struct{}{}, struct{}{})
	if !errors.Is(nativeErr, promptkit.ErrProfileNotFound) || !errors.Is(err, promptkit.ErrProfileNotFound) {
		t.Fatalf("loader view: native=%v forwarded=%v", nativeErr, err)
	}
}