package configuration

import (
	"context"
	"strings"
	"testing"

	"go.maximumdirect.net/configkit"
)

func TestTargetResolutionNormalizesNestedValues(t *testing.T) {
	state, err := load(mapping("padded target", map[string]any{
		"backends": []any{map[string]any{
			"id": "local", "endpoint": " HTTPS://example.invalid/v1 ", "concurrency_limit": 1,
			"smoke_tests": map[string]any{
				"reachability":   map[string]any{"endpoint": " https://example.invalid/health "},
				"authentication": map[string]any{"kind": " NONE ", "endpoint": " https://example.invalid/key "},
			},
		}},
		"profiles": []any{map[string]any{"id": "partial", "backend": "local", "service_tier": " standard ", "api_key_env": " TOKEN "}},
	}), nil)
	if err != nil {
		t.Fatal(err)
	}
	backend, err := state.GetBackend("local")
	if err != nil || backend.Endpoint != "https://example.invalid/v1" || backend.QueueCapacity != 1024 ||
		backend.SmokeTests == nil || *backend.SmokeTests.Reachability.Endpoint != "https://example.invalid/health" ||
		*backend.SmokeTests.Authentication.Kind != "none" || *backend.SmokeTests.Authentication.Endpoint != "https://example.invalid/key" {
		t.Fatalf("interpreted backend = %+v, %v", backend, err)
	}
	profile, err := state.GetProfile(context.Background(), "partial")
	if err != nil || profile.ResolvedTarget.ServiceTier != "standard" || profile.ResolvedTarget.APIKeyEnv != "TOKEN" {
		t.Fatalf("interpreted profile = %+v, %v", profile, err)
	}
	composed := state.result.Config.Backends[0]
	if *composed.Endpoint != "https://example.invalid/v1" || composed.QueueCapacity == nil || *composed.QueueCapacity != 1024 ||
		*composed.SmokeTests.Reachability.Endpoint != "https://example.invalid/health" ||
		*composed.SmokeTests.Authentication.Kind != "none" || *composed.SmokeTests.Authentication.Endpoint != "https://example.invalid/key" ||
		*state.result.Config.Profiles[0].ServiceTier != "standard" || *state.result.Config.Profiles[0].APIKeyEnv != "TOKEN" {
		t.Fatalf("resolved values were not normalized: %+v", state.result.Config)
	}
	path := configkit.Keys("backends").Index(0).Key("smoke_tests").Key("authentication").Key("endpoint")
	field, found := state.result.Metadata().Lookup(path)
	if !found || field.Origin.Operation != configkit.ChangeNormalization {
		t.Fatalf("nested field origin changed: %+v", field)
	}
	for _, path := range []configkit.Path{
		configkit.Keys("backends").Index(0).Key("endpoint"),
		configkit.Keys("backends").Index(0).Key("smoke_tests").Key("reachability").Key("endpoint"),
		configkit.Keys("backends").Index(0).Key("smoke_tests").Key("authentication").Key("kind"),
		configkit.Keys("profiles").Index(0).Key("service_tier"),
		configkit.Keys("profiles").Index(0).Key("api_key_env"),
	} {
		field, found := state.result.Metadata().Lookup(path)
		if !found || field.Origin.Operation != configkit.ChangeNormalization {
			t.Errorf("normalization at %v: %+v", path, field)
		}
	}
}

func TestPromptResolutionNormalizesOutputAndRejectsDuplicateNames(t *testing.T) {
	definition := map[string]any{
		"id": "example", "inputs": []any{map[string]any{"name": " document "}},
		"messages": []any{map[string]any{"role": "user", "content": "hello"}},
		"output":   map[string]any{"format": "json", "validation_mode": "json_schema", "schema_path": " schema.json "},
	}
	state, err := load(mapping("prompt metadata", map[string]any{"prompts": []any{definition}}), nil)
	if err != nil {
		t.Fatal(err)
	}
	selected, inspection, err := state.prompt("example")
	if err != nil || selected.Validation.SchemaPath != "schema.json" || inspection.OutputContract.SchemaPath != "schema.json" || selected.Inputs[0].Name != "document" {
		t.Fatalf("interpreted prompt = %+v, %+v, %v", selected, inspection, err)
	}
	composed := state.result.Config.Prompts[0]
	if *composed.Output.SchemaPath != "schema.json" || composed.Inputs[0].Name != "document" {
		t.Fatalf("prompt was not normalized: %+v", composed)
	}
	definition["inputs"] = []any{map[string]any{"name": " document "}, map[string]any{"name": "document"}}
	_, err = load(mapping("duplicate inputs", map[string]any{"prompts": []any{definition}}), nil)
	if err == nil || !strings.Contains(err.Error(), "/prompts/0/inputs/1") || !strings.Contains(err.Error(), "duplicated") {
		t.Fatalf("duplicate normalized names were not rejected: %v", err)
	}
}

func TestPromptResolutionRecordsMessageFields(t *testing.T) {
	loadPrompt := func(role, cacheType, ttl string) *loaded {
		t.Helper()
		state, err := load(mapping("prompt", map[string]any{"prompts": []any{map[string]any{
			"id": "example", "inputs": []any{map[string]any{"name": " input ", "content_type": nil, "description": " text "}},
			"messages": []any{map[string]any{"role": role, "content": "", "cache_control": map[string]any{"type": cacheType, "ttl": ttl}}},
			"output":   map[string]any{"format": "text", "validation_mode": "basic"},
		}}}), nil)
		if err != nil {
			t.Fatal(err)
		}
		return state
	}
	padded := loadPrompt(" USER ", " ephemeral ", " 1h ")
	canonical := loadPrompt("user", "ephemeral", "1h")
	definition, inspection, err := padded.prompt("example")
	if err != nil {
		t.Fatal(err)
	}
	other, otherInspection, err := canonical.prompt("example")
	if err != nil || inspection.PromptHash != otherInspection.PromptHash || definition.Templates[0].Role != other.Templates[0].Role || definition.Templates[0].Content != "" {
		t.Fatalf("equivalent prompt mismatch: %+v %+v %v", definition, other, err)
	}
	base := configkit.Keys("prompts").Index(0)
	for _, path := range []configkit.Path{base.Key("inputs").Index(0).Key("name"), base.Key("inputs").Index(0).Key("description"), base.Key("messages").Index(0).Key("role"), base.Key("messages").Index(0).Key("cache_control").Key("type"), base.Key("messages").Index(0).Key("cache_control").Key("ttl")} {
		field, found := padded.result.Metadata().Lookup(path)
		if !found || field.Origin.Operation != configkit.ChangeNormalization {
			t.Errorf("normalization at %v: %+v", path, field)
		}
	}
	if padded.promptMetadata["example"][0].contentType != fieldNull {
		t.Fatal("null input metadata was not retained")
	}
}

func TestResolutionRecordsTargetDependencies(t *testing.T) {
	backend := func(id string) map[string]any {
		return map[string]any{"id": id, "endpoint": " HTTPS://example.invalid/v1 ", "concurrency_limit": 2, "queue_capacity": nil}
	}
	state, err := load(mapping("targets", map[string]any{
		"backends":    []any{backend("root")},
		"collections": map[string]any{"scoped": map[string]any{"backends": []any{backend("local")}}},
	}), nil)
	if err != nil {
		t.Fatal(err)
	}
	for _, base := range []configkit.Path{configkit.Keys("backends").Index(0), configkit.Keys("collections", "scoped", "backends").Index(0)} {
		endpoint, ok := state.result.Explain(base.Key("endpoint"))
		if !ok || !strings.Contains(endpoint.Effective.YAML, "https://example.invalid/v1") {
			t.Fatalf("endpoint explanation: %+v", endpoint)
		}
		history := state.result.Metadata().History(base.Key("queue_capacity"))
		found := false
		for _, change := range history {
			if change.Origin.Operation == configkit.ChangeDerivedDefault {
				for _, dependency := range change.Dependencies {
					if dependency.String() == base.Key("concurrency_limit").String() {
						found = true
					}
				}
			}
		}
		if !found {
			t.Fatalf("missing queue dependency: %+v", history)
		}
	}
}