package configuration

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

	"gitea.maximumdirect.net/eric/ConfigKit"
	"gitea.maximumdirect.net/eric/promptkit/internal/domain"
)

func TestLoadedListsSortedEffectiveIdentities(t *testing.T) {
	state, err := Load(mapping("identities", map[string]any{
		"backends": map[string]any{
			"local": map[string]any{"endpoint": "http://localhost:8080/v1"},
		},
		"collections": map[string]any{
			"z":       map[string]any{"profiles": map[string]any{"profile": map[string]any{"backend": "local", "model": "z-model"}}, "prompts": map[string]any{"prompt": listingPromptDefinition()}},
			"partial": map[string]any{"profiles": map[string]any{"profile": map[string]any{"backend": "local"}}},
			"a":       map[string]any{"profiles": map[string]any{"profile": map[string]any{"backend": "local", "model": "a-model"}}, "prompts": map[string]any{"prompt": listingPromptDefinition()}},
			" z":      map[string]any{"profiles": map[string]any{"profile ": map[string]any{"backend": "local", "model": "spaced-model"}}, "prompts": map[string]any{"prompt ": listingPromptDefinition()}},
		},
	}), nil)
	if err != nil {
		t.Fatal(err)
	}
	backends, err := state.ListBackends(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	wantBackends := []string{"local"}
	if !reflect.DeepEqual(backends, wantBackends) {
		t.Fatalf("backend IDs = %#v, want %#v", backends, wantBackends)
	}

	profiles, err := state.ListProfiles(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	wantProfiles := []string{" z/profile ", "a/profile", "partial/profile", "z/profile"}
	if !reflect.DeepEqual(profiles, wantProfiles) {
		t.Fatalf("profile IDs = %#v, want %#v", profiles, wantProfiles)
	}

	prompts, err := state.ListPrompts(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	wantPrompts := []domain.PromptIdentity{
		{ID: " z/prompt ", Version: stringPointer("v1")},
		{ID: "a/prompt", Version: stringPointer("v1")},
		{ID: "z/prompt", Version: stringPointer("v1")},
	}
	if !reflect.DeepEqual(prompts, wantPrompts) {
		t.Fatalf("prompt identities = %#v, want %#v", prompts, wantPrompts)
	}
}

func TestLoadedListsAreIndependent(t *testing.T) {
	state, err := Load(mapping("identities", map[string]any{
		"backends": map[string]any{"backend": map[string]any{"endpoint": "https://example.test/v1"}},
		"profiles": map[string]any{"profile": map[string]any{}},
		"prompts":  map[string]any{"example": listingPromptDefinition()},
	}), nil)
	if err != nil {
		t.Fatal(err)
	}

	profiles, err := state.ListProfiles(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	profiles = append(profiles, "caller profile")
	profiles[0] = "changed profile"
	backends, err := state.ListBackends(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	backends[0] = "changed backend"

	prompts, err := state.ListPrompts(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	prompts[0].ID = "changed prompt"
	*prompts[0].Version = "changed version"

	profiles, err = state.ListProfiles(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	if !reflect.DeepEqual(profiles, []string{"profile"}) {
		t.Fatalf("caller mutation changed profile inventory: %#v", profiles)
	}
	backends, err = state.ListBackends(context.Background())
	if err != nil || !reflect.DeepEqual(backends, []string{"backend"}) {
		t.Fatalf("caller mutation changed backend inventory: %#v, %v", backends, err)
	}
	prompts, err = state.ListPrompts(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	wantPrompts := []domain.PromptIdentity{{ID: "example", Version: stringPointer("v1")}}
	if !reflect.DeepEqual(prompts, wantPrompts) {
		t.Fatalf("caller mutation changed prompt inventory: %#v", prompts)
	}
}

func TestLoadedListsEmptyInventory(t *testing.T) {
	state, err := Load(configkit.Input{Source: configkit.NoSource()}, nil)
	if err != nil {
		t.Fatal(err)
	}
	profiles, err := state.ListProfiles(context.Background())
	if err != nil || len(profiles) != 0 {
		t.Fatalf("empty profile listing = %#v, %v", profiles, err)
	}
	backends, err := state.ListBackends(context.Background())
	if err != nil || len(backends) != 0 {
		t.Fatalf("empty backend listing = %#v, %v", backends, err)
	}
	prompts, err := state.ListPrompts(context.Background())
	if err != nil || len(prompts) != 0 {
		t.Fatalf("empty prompt listing = %#v, %v", prompts, err)
	}
}

func TestLoadedListsHonorCanceledContext(t *testing.T) {
	state, err := Load(mapping("identities", map[string]any{
		"profiles": map[string]any{"partial": map[string]any{}},
		"prompts":  map[string]any{"example": listingPromptDefinition()},
	}), nil)
	if err != nil {
		t.Fatal(err)
	}
	ctx, cancel := context.WithCancel(context.Background())
	cancel()

	profiles, err := state.ListProfiles(ctx)
	if !errors.Is(err, context.Canceled) || len(profiles) != 0 {
		t.Fatalf("canceled profile listing = %#v, %v", profiles, err)
	}
	backends, err := state.ListBackends(ctx)
	if !errors.Is(err, context.Canceled) || len(backends) != 0 {
		t.Fatalf("canceled backend listing = %#v, %v", backends, err)
	}
	prompts, err := state.ListPrompts(ctx)
	if !errors.Is(err, context.Canceled) || len(prompts) != 0 {
		t.Fatalf("canceled prompt listing = %#v, %v", prompts, err)
	}
}

func listingPromptDefinition() map[string]any {
	return map[string]any{
		"version":  "v1",
		"messages": []any{map[string]any{"role": "user", "content": "Hello."}},
		"output":   map[string]any{"format": "text", "validation_mode": "basic"},
	}
}