package api

import (
	"bytes"
	"encoding/json"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"bat-api/internal/backendrpc"
)

func readContractFixture(t *testing.T, name string) []byte {
	t.Helper()
	data, err := os.ReadFile(filepath.Join("testdata", "contract", name))
	if err != nil {
		t.Fatalf("read contract fixture %s: %v", name, err)
	}
	return data
}

func TestRustContractFixturesPreserveGoMirror(t *testing.T) {
	availableRaw := readContractFixture(t, "catalog-status.available.json")
	unavailableRaw := readContractFixture(t, "catalog-status.unavailable.json")
	manifestRaw := readContractFixture(t, "resource-manifest.page0.json")
	snapshotRaw := readContractFixture(t, "official-sync-snapshot.json")

	for name, raw := range map[string][]byte{
		"catalog available":   availableRaw,
		"catalog unavailable": unavailableRaw,
		"resource manifest":   manifestRaw,
		"snapshot":            snapshotRaw,
	} {
		if bytes.Contains(raw, []byte("/tmp/")) {
			t.Fatalf("%s contains an absolute temporary path", name)
		}
		if bytes.Contains(raw, []byte("r93_fixture")) {
			t.Fatalf("%s contains a concrete release token", name)
		}
	}

	summary, resourceRoot, available := parseCatalogStatus(availableRaw)
	if !available || summary == nil {
		t.Fatal("available catalog fixture was not accepted")
	}
	if summary.Status != "published" || summary.StatusCode != "official.published" {
		t.Fatalf("catalog status=%+v", summary)
	}
	if summary.DistributionStatusCode != "distribution.ready" {
		t.Fatalf("distribution status=%q", summary.DistributionStatusCode)
	}
	if resourceRoot != "${RESOURCE_ROOT}" || summary.VersionID != "${VERSION_ID}" {
		t.Fatalf("catalog root/version=%q/%q", resourceRoot, summary.VersionID)
	}
	if summary.LauncherMetadata == nil || summary.GameMainConfig == nil {
		t.Fatalf("catalog optional objects missing: %+v", summary)
	}
	if summary.LauncherMetadata.GameLowestVersion != "" {
		t.Fatalf("null optional field became non-empty: %q", summary.LauncherMetadata.GameLowestVersion)
	}
	if summary.GameMainConfig.DefaultConnectionGroup != "${CONNECTION_GROUP}" {
		t.Fatalf("game config=%+v", summary.GameMainConfig)
	}

	if got, _, ok := parseCatalogStatus(unavailableRaw); got != nil || ok {
		t.Fatalf("unavailable catalog parsed as available: got=%+v ok=%v", got, ok)
	}

	var manifest backendrpc.ResourceManifestPage
	if err := json.Unmarshal(manifestRaw, &manifest); err != nil {
		t.Fatalf("decode resource manifest: %v", err)
	}
	if !manifest.Available || manifest.ManifestVersion != 1 || manifest.TotalEntries != 2 {
		t.Fatalf("manifest header=%+v", manifest)
	}
	if len(manifest.Entries) != 2 {
		t.Fatalf("manifest entries=%d", len(manifest.Entries))
	}
	if manifest.Entries[0].Bytes == nil || *manifest.Entries[0].Bytes != 21 {
		t.Fatalf("manifest first bytes=%v", manifest.Entries[0].Bytes)
	}
	if manifest.Entries[0].BLAKE3 == "" || !strings.Contains(manifest.Entries[0].Destination, "{addressables-root}") {
		t.Fatalf("manifest first entry=%+v", manifest.Entries[0])
	}

	var snapshot struct {
		AppVersion              string                   `json:"app_version"`
		BundleVersion           string                   `json:"bundle_version"`
		GameMainConfigBootstrap *GameMainConfigSummary   `json:"game_main_config_bootstrap"`
		LauncherMetadata        *LauncherMetadataSummary `json:"launcher_metadata"`
		LegacyGameMainConfig    json.RawMessage          `json:"game_main_config"`
	}
	if err := json.Unmarshal(snapshotRaw, &snapshot); err != nil {
		t.Fatalf("decode snapshot: %v", err)
	}
	if snapshot.AppVersion != "${APP_VERSION}" || snapshot.BundleVersion != "${BUNDLE_VERSION}" {
		t.Fatalf("snapshot versions=%q/%q", snapshot.AppVersion, snapshot.BundleVersion)
	}
	if snapshot.GameMainConfigBootstrap == nil || snapshot.GameMainConfigBootstrap.ServerInfoDataURL == "" {
		t.Fatalf("snapshot game config=%+v", snapshot.GameMainConfigBootstrap)
	}
	if snapshot.GameMainConfigBootstrap.ServerInfoDataURL != "https://yostar-serverinfo.bluearchiveyostar.com/{server-info-path}" {
		t.Fatalf("snapshot server info=%q", snapshot.GameMainConfigBootstrap.ServerInfoDataURL)
	}
	if snapshot.LauncherMetadata == nil || snapshot.LauncherMetadata.ManifestSource == "" {
		t.Fatalf("snapshot launcher metadata=%+v", snapshot.LauncherMetadata)
	}
	if len(snapshot.LegacyGameMainConfig) != 0 {
		t.Fatalf("legacy game_main_config field unexpectedly present: %s", snapshot.LegacyGameMainConfig)
	}
}