package sdkserver

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestInventoryMaterialsUpdateIsCatalogBoundAndPreservesSave(t *testing.T) {
	root := t.TempDir()
	t.Chdir(root)
	if err := os.Mkdir("resources", 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join("resources", "InventoryItemConfig.json"), []byte(`{"item_ids":[101,102,301]}`), 0o644); err != nil {
		t.Fatal(err)
	}
	eidolonConfig := `{"avatars":{"1001":{"ranks":[{"cost":[{"ItemID":11001,"ItemNum":1}]}]}},"ex_materials":{}}`
	if err := os.WriteFile(filepath.Join("resources", "EidolonConfig.json"), []byte(eidolonConfig), 0o644); err != nil {
		t.Fatal(err)
	}
	original := `{"avatars":{"1001":{"level":80}},"battle_config":{},"materials":{"101":4}}`
	if err := os.WriteFile("freesr-data.json", []byte(original), 0o644); err != nil {
		t.Fatal(err)
	}

	request := httptest.NewRequest(http.MethodPost, "/api/inventory/materials", strings.NewReader(`{"updates":[{"item_id":101,"count":0},{"item_id":301,"count":9}]}`))
	response := httptest.NewRecorder()
	apiInventoryMaterials(response, request)
	if response.Code != http.StatusOK {
		t.Fatalf("POST status = %d, body=%s", response.Code, response.Body.String())
	}
	var saved map[string]json.RawMessage
	raw, err := os.ReadFile("freesr-data.json")
	if err != nil {
		t.Fatal(err)
	}
	if err := json.Unmarshal(raw, &saved); err != nil {
		t.Fatal(err)
	}
	var avatars map[string]any
	if err := json.Unmarshal(saved["avatars"], &avatars); err != nil || avatars["1001"] == nil {
		t.Fatalf("existing avatar data was not preserved: %s", saved["avatars"])
	}
	var materials map[string]uint32
	if err := json.Unmarshal(saved["materials"], &materials); err != nil {
		t.Fatal(err)
	}
	if materials["101"] != 0 || materials["301"] != 9 {
		t.Fatalf("saved materials = %#v", materials)
	}

	reset := httptest.NewRequest(http.MethodPost, "/api/inventory/materials", strings.NewReader(`{"updates":[{"item_id":101,"reset":true}]}`))
	resetResponse := httptest.NewRecorder()
	apiInventoryMaterials(resetResponse, reset)
	if resetResponse.Code != http.StatusOK {
		t.Fatalf("reset status = %d, body=%s", resetResponse.Code, resetResponse.Body.String())
	}
	raw, err = os.ReadFile("freesr-data.json")
	if err != nil {
		t.Fatal(err)
	}
	if err := json.Unmarshal(raw, &saved); err != nil {
		t.Fatal(err)
	}
	materials = nil
	if err := json.Unmarshal(saved["materials"], &materials); err != nil {
		t.Fatal(err)
	}
	if _, exists := materials["101"]; exists || materials["301"] != 9 {
		t.Fatalf("reset did not restore default while preserving other edits: %#v", materials)
	}

	before := string(raw)
	bad := httptest.NewRequest(http.MethodPost, "/api/inventory/materials", strings.NewReader(`{"updates":[{"item_id":999,"count":1}]}`))
	badResponse := httptest.NewRecorder()
	apiInventoryMaterials(badResponse, bad)
	if badResponse.Code != http.StatusBadRequest {
		t.Fatalf("uncatalogued item HTTP status = %d, body=%s", badResponse.Code, badResponse.Body.String())
	}
	var errResponse struct {
		Status int `json:"status"`
	}
	if err := json.Unmarshal(badResponse.Body.Bytes(), &errResponse); err != nil || errResponse.Status != http.StatusBadRequest {
		t.Fatalf("uncatalogued item response = %s", badResponse.Body.String())
	}
	after, err := os.ReadFile("freesr-data.json")
	if err != nil {
		t.Fatal(err)
	}
	if string(after) != before {
		t.Fatal("uncatalogued item update modified freesr-data.json")
	}
}