package article

import (
	"path/filepath"
	"strings"
	"testing"
	"time"

	"git.mchus.pro/mchus/quoteforge/internal/localdb"
	"git.mchus.pro/mchus/quoteforge/internal/models"
)

func TestBuild_ParsesNetAndPSU(t *testing.T) {
	local, err := localdb.New(filepath.Join(t.TempDir(), "local.db"))
	if err != nil {
		t.Fatalf("init local db: %v", err)
	}
	t.Cleanup(func() { _ = local.Close() })

	if err := local.SaveLocalPricelist(&localdb.LocalPricelist{
		ServerID:  1,
		Source:    "estimate",
		Version:   "S-2026-02-11-001",
		Name:      "test",
		CreatedAt: time.Now(),
		SyncedAt:  time.Now(),
	}); err != nil {
		t.Fatalf("save local pricelist: %v", err)
	}
	localPL, err := local.GetLocalPricelistByServerID(1)
	if err != nil {
		t.Fatalf("get local pricelist: %v", err)
	}

	if err := local.SaveLocalPricelistItems([]localdb.LocalPricelistItem{
		{PricelistID: localPL.ID, LotName: "NIC_2p25G_MCX512A-AC", LotCategory: "NIC", Price: 1},
		{PricelistID: localPL.ID, LotName: "HBA_2pFC32_Gen6", LotCategory: "HBA", Price: 1},
		{PricelistID: localPL.ID, LotName: "PS_1000W_Platinum", LotCategory: "PS", Price: 1},
	}); err != nil {
		t.Fatalf("save local items: %v", err)
	}

	items := models.ConfigItems{
		{LotName: "NIC_2p25G_MCX512A-AC", Quantity: 1},
		{LotName: "HBA_2pFC32_Gen6", Quantity: 1},
		{LotName: "PS_1000W_Platinum", Quantity: 2},
		{LotName: "SVC_1yW_x86", Quantity: 1},
	}
	result, err := Build(local, items, BuildOptions{
		ServerModel: "DL380GEN11",
	})
	if err != nil {
		t.Fatalf("build article: %v", err)
	}
	if result.Article == "" {
		t.Fatalf("expected article to be non-empty")
	}
	if contains(result.Article, "UNKNET") || contains(result.Article, "UNKPSU") {
		t.Fatalf("unexpected UNK in article: %s", result.Article)
	}
	if !contains(result.Article, "1yW") {
		t.Fatalf("expected support segment 1yW in article: %s", result.Article)
	}
}

// TestBuild_CompressArticle_NoGPU_PSUNotNIC reproduces the bug where 2 PSUs produced
// "2xNIC" in the article because compressArticle used hard-coded indices that assumed
// GPU was always present.
func TestBuild_CompressArticle_NoGPU_PSUNotNIC(t *testing.T) {
	local, err := localdb.New(filepath.Join(t.TempDir(), "local.db"))
	if err != nil {
		t.Fatalf("init local db: %v", err)
	}
	t.Cleanup(func() { _ = local.Close() })

	if err := local.SaveLocalPricelist(&localdb.LocalPricelist{
		ServerID:  2,
		Source:    "estimate",
		Version:   "S-2026-05-19-001",
		Name:      "test",
		CreatedAt: time.Now(),
		SyncedAt:  time.Now(),
	}); err != nil {
		t.Fatalf("save local pricelist: %v", err)
	}
	localPL, err := local.GetLocalPricelistByServerID(2)
	if err != nil {
		t.Fatalf("get local pricelist: %v", err)
	}

	if err := local.SaveLocalPricelistItems([]localdb.LocalPricelistItem{
		{PricelistID: localPL.ID, LotName: "CPU_INTEL_8358", LotCategory: "CPU", Price: 1},
		{PricelistID: localPL.ID, LotName: "MEM_DDR4_64G_3200", LotCategory: "MEM", Price: 1},
		{PricelistID: localPL.ID, LotName: "SSD_SATA_0.4T", LotCategory: "SSD", Price: 1},
		{PricelistID: localPL.ID, LotName: "SSD_SATA_0.9T", LotCategory: "SSD", Price: 1},
		{PricelistID: localPL.ID, LotName: "HDD_SATA_16T", LotCategory: "HDD", Price: 1},
		{PricelistID: localPL.ID, LotName: "NIC_2p25G_MCX512A", LotCategory: "NIC", Price: 1},
		{PricelistID: localPL.ID, LotName: "HBA_2pFC32_Gen6", LotCategory: "HBA", Price: 1},
		{PricelistID: localPL.ID, LotName: "NIC_4p1G_I350", LotCategory: "NIC", Price: 1},
		{PricelistID: localPL.ID, LotName: "PS_1500W_Platinum", LotCategory: "PS", Price: 1},
	}); err != nil {
		t.Fatalf("save local items: %v", err)
	}

	// PS_1500W → "2x1.5kW" (7 chars) brings uncompressed article to 81 chars, triggering
	// compressArticle. Before the fix, compressArticle used hard-coded index 5 for NET, but
	// without GPU the PSU sits at index 5, so compressNetSegment("2x1.5kW") returned "2xNIC".
	items := models.ConfigItems{
		{LotName: "CPU_INTEL_8358", Quantity: 2},
		{LotName: "MEM_DDR4_64G_3200", Quantity: 16}, // 1024 GiB = 1T
		{LotName: "SSD_SATA_0.4T", Quantity: 2},
		{LotName: "SSD_SATA_0.9T", Quantity: 4},
		{LotName: "HDD_SATA_16T", Quantity: 6},
		{LotName: "NIC_2p25G_MCX512A", Quantity: 1},
		{LotName: "HBA_2pFC32_Gen6", Quantity: 1},
		{LotName: "NIC_4p1G_I350", Quantity: 1},
		{LotName: "PS_1500W_Platinum", Quantity: 2},
	}
	result, err := Build(local, items, BuildOptions{
		ServerModel: "NF5280M6",
	})
	if err != nil {
		t.Fatalf("build article: %v", err)
	}
	if len([]rune(result.Article)) > 80 {
		t.Fatalf("article too long (%d): %s", len([]rune(result.Article)), result.Article)
	}
	// PSU segment must not be mis-labeled as NIC during compression
	// The correct behaviour: PSU is dropped, NET stays as-is or compressed to HBA/NIC labels
	// Before the fix: article ended with "-2xNIC" (PSU turned into NIC)
	// After the fix: article must not contain a standalone "NIC" that came from PSU wattage
	if strings.HasSuffix(result.Article, "-2xNIC") {
		t.Fatalf("PSU mis-labeled as NIC in article: %s", result.Article)
	}
	t.Logf("article: %s (warnings: %v)", result.Article, result.Warnings)
}

func contains(s, sub string) bool {
	return strings.Contains(s, sub)
}

func TestParseGPUModel_VendorLetterSuffix(t *testing.T) {
	cases := map[string]string{
		"GPU_NV_RTX_PRO_6000D_SERVER_84GB_PCIE": "RTX6000D_84GB",
		"GPU_NV_RTX_PRO_6000_SERVER_96GB_PCIE":  "RTX6000_96GB",
	}
	for in, want := range cases {
		got, ok := parseGPUModel(in)
		if !ok || got != want {
			t.Errorf("parseGPUModel(%q) = %q, %v, want %q, true", in, got, ok, want)
		}
	}
}

// TestBuild_UnparseableModel_CategoryPlaceholder: a GPU LOT whose name does not
// match the expected shape must not silently vanish or emit "UNK" — the article
// carries the category token and the segment is flagged not-recognized with a
// warning naming the lot.
func TestBuild_UnparseableModel_CategoryPlaceholder(t *testing.T) {
	local, err := localdb.New(filepath.Join(t.TempDir(), "local.db"))
	if err != nil {
		t.Fatalf("init local db: %v", err)
	}
	t.Cleanup(func() { _ = local.Close() })

	if err := local.SaveLocalPricelist(&localdb.LocalPricelist{
		ServerID: 9, Source: "estimate", Version: "v1", Name: "t",
		IsActive: true, CreatedAt: time.Now(), SyncedAt: time.Now(),
	}); err != nil {
		t.Fatalf("save pricelist: %v", err)
	}
	pl, err := local.GetLocalPricelistByServerID(9)
	if err != nil {
		t.Fatalf("get pricelist: %v", err)
	}
	if err := local.SaveLocalPricelistItems([]localdb.LocalPricelistItem{
		{PricelistID: pl.ID, LotName: "WEIRDGPUNAME", LotCategory: "GPU", Price: 1},
	}); err != nil {
		t.Fatalf("save items: %v", err)
	}

	result, err := Build(local, models.ConfigItems{
		{LotName: "WEIRDGPUNAME", Quantity: 4},
	}, BuildOptions{ServerModel: "X1"})
	if err != nil {
		t.Fatalf("build: %v", err)
	}
	if contains(result.Article, "UNK") {
		t.Fatalf("article must not contain UNK: %s", result.Article)
	}
	if !contains(result.Article, "4xGPU") {
		t.Fatalf("expected category placeholder 4xGPU in article: %s", result.Article)
	}
	var gpu *ResultSegment
	for i := range result.Segments {
		if result.Segments[i].Group == "GPU" {
			gpu = &result.Segments[i]
		}
	}
	if gpu == nil || gpu.Recognized {
		t.Fatalf("GPU segment must be present and not recognized: %+v", result.Segments)
	}
	if len(result.Warnings) == 0 || !contains(strings.Join(result.Warnings, "|"), "WEIRDGPUNAME") {
		t.Fatalf("expected a warning naming WEIRDGPUNAME, got %v", result.Warnings)
	}
}