package topdata

import (
	"bytes"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestRunConvertCommandInfersTemplateNamespaceAndOutput(t *testing.T) {
	root := testProjectRoot(t)
	writeFile(t, filepath.Join(root, "nwn-tool.json"), `{
  "module": {"name": "Test", "resref": "test"},
  "paths": {"source": "src", "assets": "assets", "build": "build"},
  "topdata": {"source": "topdata", "build": "build/topdata"}
}`+"\n")
	mkdirAll(t, filepath.Join(root, "topdata", "templates"))
	mkdirAll(t, filepath.Join(root, "topdata", "data", "appearance", "modules"))
	writeFile(t, filepath.Join(root, "topdata", "templates", "config.json"), `{
  "tables": {
    "template_appearance": {
      "namespace": "appearance",
      "key_fields": ["LABEL"]
    }
  }
}`+"\n")
	writeFile(t, filepath.Join(root, "topdata", "templates", "template_appearance.2da"), "2DA V2.0\n\nLABEL STRING_REF NAME\n960 \"Zombie, Ash, Hot\" **** Zombie_Ash_Hot\n961 \"Zombie, Ash, Done\" **** Zombie_Ash_Done\n")

	oldCwd, err := os.Getwd()
	if err != nil {
		t.Fatalf("getwd: %v", err)
	}
	t.Cleanup(func() {
		_ = os.Chdir(oldCwd)
	})
	if err := os.Chdir(root); err != nil {
		t.Fatalf("chdir: %v", err)
	}

	var stdout bytes.Buffer
	if err := RunConvertCommand([]string{
		"2da-to-module",
		"--name", "ashzombies",
		"topdata/templates/template_appearance.2da",
	}, &stdout); err != nil {
		t.Fatalf("RunConvertCommand failed: %v", err)
	}

	outputPath := filepath.Join(root, "topdata", "data", "appearance", "modules", "add_appearance_ashzombies.json")
	raw, err := os.ReadFile(outputPath)
	if err != nil {
		t.Fatalf("read output: %v", err)
	}
	text := string(raw)
	if !strings.Contains(text, `"appearance:zombie_ash_hot"`) || !strings.Contains(text, `"appearance:zombie_ash_done"`) {
		t.Fatalf("unexpected output:\n%s", text)
	}
	if !strings.Contains(stdout.String(), "converted entries: 2") {
		t.Fatalf("unexpected stdout: %s", stdout.String())
	}
}

func TestRunConvertCommandFailsOnUnkeyedRows(t *testing.T) {
	root := testProjectRoot(t)
	writeFile(t, filepath.Join(root, "nwn-tool.json"), `{
  "module": {"name": "Test", "resref": "test"},
  "paths": {"source": "src", "assets": "assets", "build": "build"},
  "topdata": {"source": "topdata", "build": "build/topdata"}
}`+"\n")
	mkdirAll(t, filepath.Join(root, "topdata", "templates"))
	writeFile(t, filepath.Join(root, "topdata", "templates", "config.json"), `{
  "tables": {
    "template_appearance": {
      "namespace": "appearance",
      "key_fields": ["STRING_REF"]
    }
  }
}`+"\n")
	writeFile(t, filepath.Join(root, "topdata", "templates", "template_appearance.2da"), "2DA V2.0\n\nLABEL STRING_REF NAME\n960 \"Zombie, Ash, Hot\" **** Zombie_Ash_Hot\n")

	oldCwd, err := os.Getwd()
	if err != nil {
		t.Fatalf("getwd: %v", err)
	}
	t.Cleanup(func() {
		_ = os.Chdir(oldCwd)
	})
	if err := os.Chdir(root); err != nil {
		t.Fatalf("chdir: %v", err)
	}

	err = RunConvertCommand([]string{
		"2da-to-module",
		"--name", "ashzombies",
		"topdata/templates/template_appearance.2da",
	}, &bytes.Buffer{})
	if err == nil || !strings.Contains(err.Error(), "unable to generate keys for row ids 960") {
		t.Fatalf("expected unkeyed row failure, got %v", err)
	}
}

func TestConvert2DAToModuleFailsOnDuplicateGeneratedKeysByDefault(t *testing.T) {
	_, err := convert2DAToModule(parsed2DA{
		Columns: []string{"LABEL"},
		Rows: []map[string]any{
			{"id": 1, "LABEL": "Zombie"},
			{"id": 2, "LABEL": "Zombie"},
		},
	}, "topdata/data/appearance/modules/add_appearance_ashzombies.json", convertOptions{
		Namespace:     "appearance",
		CollisionMode: "error",
	})
	if err == nil || !strings.Contains(err.Error(), `duplicate generated key "appearance:zombie"`) {
		t.Fatalf("expected duplicate generated key error, got %v", err)
	}
}

func TestParse2DAFileRejectsRowsWithTooManyFields(t *testing.T) {
	root := t.TempDir()
	inputPath := filepath.Join(root, "bad.2da")
	writeFile(t, inputPath, "2DA V2.0\n\nLABEL NAME\n0 one two three\n")

	_, err := parse2DAFile(inputPath)
	if err == nil || !strings.Contains(err.Error(), "has 3 values but only 2 columns are declared") {
		t.Fatalf("expected row width error, got %v", err)
	}
}