package handlers_test

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

	"git.georgsen.dk/hwlab/internal/api/handlers"
	"git.georgsen.dk/hwlab/internal/netbox"
)

// mockNetBoxClient satisfies the SearchNetBoxClient interface.
type mockNetBoxClient struct {
	devices []netbox.Device
	err     error
}

func (m *mockNetBoxClient) ListDevices(_ context.Context, _ int) ([]netbox.Device, error) {
	return m.devices, m.err
}

// mockAIClient returns canned JSON for TextComplete.
type mockAIClient struct {
	response string
	err      error
}

func (m *mockAIClient) TextComplete(_ context.Context, _ string) (string, error) {
	return m.response, m.err
}

func testDevices() []netbox.Device {
	return []netbox.Device{
		{ID: 1, Name: "10GbE NIC Intel X550", CustomFields: netbox.CustomFields{CatalogStatus: "available", HWID: "HW-0001"}},
		{ID: 2, Name: "Raspberry Pi 4B", CustomFields: netbox.CustomFields{CatalogStatus: "draft", HWID: "HW-0002"}},
		{ID: 3, Name: "10GbE NIC Mellanox", CustomFields: netbox.CustomFields{CatalogStatus: "complete", HWID: "HW-0003"}},
		{ID: 4, Name: "USB-C Hub", CustomFields: netbox.CustomFields{CatalogStatus: "available", HWID: "HW-0004"}},
	}
}

// TestSearch_EmptyQ verifies that missing q parameter returns 400.
func TestSearch_EmptyQ(t *testing.T) {
	h := handlers.NewSearchHandler(&mockNetBoxClient{}, &mockAIClient{})
	req := httptest.NewRequest(http.MethodGet, "/api/search", nil)
	w := httptest.NewRecorder()
	h.SearchDevices(w, req)

	if w.Code != http.StatusBadRequest {
		t.Fatalf("expected 400, got %d", w.Code)
	}
	var body map[string]string
	if err := json.NewDecoder(w.Body).Decode(&body); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if !strings.Contains(body["error"], "q parameter") {
		t.Errorf("expected error about q parameter, got %q", body["error"])
	}
}

// TestSearch_LLMParseFallback verifies that when LLM returns unparseable JSON,
// the handler falls back to name substring match against the raw query.
func TestSearch_LLMParseFallback(t *testing.T) {
	nb := &mockNetBoxClient{devices: testDevices()}
	ai := &mockAIClient{response: "not valid json {{ broken"}
	h := handlers.NewSearchHandler(nb, ai)

	req := httptest.NewRequest(http.MethodGet, "/api/search?q=NIC", nil)
	w := httptest.NewRecorder()
	h.SearchDevices(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d (body: %s)", w.Code, w.Body.String())
	}
	var items []map[string]interface{}
	if err := json.NewDecoder(w.Body).Decode(&items); err != nil {
		t.Fatalf("decode: %v", err)
	}
	// "NIC" substring matches devices 1 and 3 (both contain "NIC")
	if len(items) != 2 {
		t.Errorf("expected 2 NIC results, got %d: %v", len(items), items)
	}
}

// TestSearch_CatalogStatusFilter verifies that LLM-extracted catalog_status filters results.
func TestSearch_CatalogStatusFilter(t *testing.T) {
	nb := &mockNetBoxClient{devices: testDevices()}
	aiResp := `{"catalog_status": "available", "name_contains": "", "tag": ""}`
	ai := &mockAIClient{response: aiResp}
	h := handlers.NewSearchHandler(nb, ai)

	req := httptest.NewRequest(http.MethodGet, "/api/search?q=show+me+available+items", nil)
	w := httptest.NewRecorder()
	h.SearchDevices(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d (body: %s)", w.Code, w.Body.String())
	}
	var items []map[string]interface{}
	if err := json.NewDecoder(w.Body).Decode(&items); err != nil {
		t.Fatalf("decode: %v", err)
	}
	// Devices 1 and 4 have catalog_status "available"
	if len(items) != 2 {
		t.Errorf("expected 2 available items, got %d", len(items))
	}
	for _, item := range items {
		if item["catalog_status"] != "available" {
			t.Errorf("unexpected catalog_status: %v", item["catalog_status"])
		}
	}
}

// TestSearch_NameContainsAndStatus verifies combined filtering works.
func TestSearch_NameContainsAndStatus(t *testing.T) {
	nb := &mockNetBoxClient{devices: testDevices()}
	aiResp := `{"catalog_status": "available", "name_contains": "NIC", "tag": ""}`
	ai := &mockAIClient{response: aiResp}
	h := handlers.NewSearchHandler(nb, ai)

	req := httptest.NewRequest(http.MethodGet, "/api/search?q=available+NICs", nil)
	w := httptest.NewRecorder()
	h.SearchDevices(w, req)

	if w.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d", w.Code)
	}
	var items []map[string]interface{}
	if err := json.NewDecoder(w.Body).Decode(&items); err != nil {
		t.Fatalf("decode: %v", err)
	}
	// Only device 1: NIC + available (device 3 is "complete")
	if len(items) != 1 {
		t.Errorf("expected 1 result, got %d", len(items))
	}
}