package main

import (
	"context"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"git.cin.su/m/Assistant/adapters/models"
	"git.cin.su/m/Assistant/contracts/capability"
	"git.cin.su/m/Assistant/contracts/cognitive"
)

type qualificationProvider struct{}

func (qualificationProvider) Probe(context.Context) models.ProviderProbe {
	return models.ProviderProbe{Health: capability.HealthAvailable}
}
func (qualificationProvider) Discover(context.Context) ([]models.DiscoveredModel, models.ProviderProbe) {
	return []models.DiscoveredModel{{ProviderModelID: "model-a"}, {ProviderModelID: "model-b"}}, models.ProviderProbe{Health: capability.HealthAvailable}
}
func (qualificationProvider) Advise(_ context.Context, request cognitive.AdvisoryRequest) (cognitive.AdvisoryResponse, error) {
	if err := models.ValidateAdvisoryRequest(request); err != nil {
		return cognitive.AdvisoryResponse{}, err
	}
	return cognitive.AdvisoryResponse{Version: request.Version, RequestID: request.RequestID, AdvisoryText: "reachable", FinishReason: cognitive.FinishCompleted}, nil
}

func TestModelQualificationUsesDiscoveredModelsAndLeavesQualityUnrated(t *testing.T) {
	provider := qualificationProvider{}
	mux := http.NewServeMux()
	mux.Handle("POST /v1/provider-discovery/{provider}/qualify", modelQualificationHandler(map[string]providerRegistration{"gpu": {ProviderInstanceID: "gpu", Provider: provider, Discovery: provider}}, "owner"))
	server := httptest.NewServer(mux)
	defer server.Close()
	request := httptest.NewRequest(http.MethodPost, server.URL+"/v1/provider-discovery/gpu/qualify", strings.NewReader(`{"prompt":"ready","max_output_bytes":128}`))
	request.Header.Set("Content-Type", "application/json")
	response := httptest.NewRecorder()
	mux.ServeHTTP(response, request)
	if response.Code != http.StatusOK {
		t.Fatalf("qualification status=%d body=%s", response.Code, response.Body.String())
	}
	if !strings.Contains(response.Body.String(), `"status":"REACHABLE"`) || !strings.Contains(response.Body.String(), `"category":"UNRATED"`) || strings.Contains(response.Body.String(), `"quality_assessed":true`) {
		t.Fatalf("qualification overclaimed quality: %s", response.Body.String())
	}
}

func TestModelQualificationRejectsUnboundedOutput(t *testing.T) {
	provider := qualificationProvider{}
	mux := http.NewServeMux()
	mux.Handle("POST /v1/provider-discovery/{provider}/qualify", modelQualificationHandler(map[string]providerRegistration{"cpu": {ProviderInstanceID: "cpu", Provider: provider, Discovery: provider}}, "owner"))
	request := httptest.NewRequest(http.MethodPost, "/v1/provider-discovery/cpu/qualify", strings.NewReader(`{"prompt":"ready","max_output_bytes":8192}`))
	request.Header.Set("Content-Type", "application/json")
	response := httptest.NewRecorder()
	mux.ServeHTTP(response, request)
	if response.Code != http.StatusBadRequest {
		t.Fatalf("unbounded qualification status=%d", response.Code)
	}
}

type qualificationObserverStub struct {
	observations []capability.ModelQualificationObservation
}

func (s *qualificationObserverStub) ObserveQualification(_ context.Context, value capability.ModelQualificationObservation) error {
	s.observations = append(s.observations, value)
	return nil
}

func TestModelQualificationPersistsReachabilityWithoutQuality(t *testing.T) {
	provider := qualificationProvider{}
	observer := &qualificationObserverStub{}
	mux := http.NewServeMux()
	mux.Handle("POST /v1/provider-discovery/{provider}/qualify", modelQualificationHandler(map[string]providerRegistration{"cpu": {ProviderInstanceID: "cpu", Provider: provider, Discovery: provider}}, "owner", observer))
	request := httptest.NewRequest(http.MethodPost, "/v1/provider-discovery/cpu/qualify", strings.NewReader(`{"prompt":"ready","max_output_bytes":128,"model_ids":["model-a"]}`))
	request.Header.Set("Content-Type", "application/json")
	response := httptest.NewRecorder()
	mux.ServeHTTP(response, request)
	if response.Code != http.StatusOK || len(observer.observations) != 1 {
		t.Fatalf("qualification persistence status=%d observations=%d body=%s", response.Code, len(observer.observations), response.Body.String())
	}
	if err := observer.observations[0].Validate(); err != nil || observer.observations[0].Status != capability.ModelQualificationReachable {
		t.Fatalf("invalid qualification observation: %+v err=%v", observer.observations[0], err)
	}
}