package config_test

import (
	"os"
	"path/filepath"
	"testing"

	"git.thokra.dev/thokra/stamp/internal/config"
)

const validTOML = `
[config]
base_branch = "main"

[[projects]]
name    = "my-app"
path    = "apps/my-app"
version = "1.2.3"

[[projects]]
name    = "my-lib"
path    = "libs/my-lib"
version = "0.1.0"
`

func writeConfig(t *testing.T, dir, content string) {
	t.Helper()
	stampDir := filepath.Join(dir, ".stamp")
	if err := os.MkdirAll(stampDir, 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(stampDir, "stamp.toml"), []byte(content), 0o644); err != nil {
		t.Fatal(err)
	}
}

func TestLoad_Valid(t *testing.T) {
	dir := t.TempDir()
	writeConfig(t, dir, validTOML)

	cfg, err := config.Load(dir)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	if len(cfg.Projects) != 2 {
		t.Fatalf("expected 2 projects, got %d", len(cfg.Projects))
	}
	if cfg.BaseBranch() != "main" {
		t.Errorf("expected base_branch=main, got %s", cfg.BaseBranch())
	}
	if cfg.ChangesetDir() != ".stamp" {
		t.Errorf("expected ChangesetDir=.stamp, got %s", cfg.ChangesetDir())
	}
}

func TestLoad_Defaults(t *testing.T) {
	dir := t.TempDir()
	minimal := "[[projects]]\nname = \"app\"\npath = \".\"\nversion = \"1.0.0\"\n"
	writeConfig(t, dir, minimal)

	cfg, err := config.Load(dir)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	if cfg.BaseBranch() != "main" {
		t.Errorf("default base_branch should be main, got %s", cfg.BaseBranch())
	}
	if cfg.ChangesetDir() != ".stamp" {
		t.Errorf("default changeset_dir should be .stamp, got %s", cfg.ChangesetDir())
	}
}

func TestLoad_MissingFile(t *testing.T) {
	_, err := config.Load(t.TempDir())
	if err == nil {
		t.Fatal("expected error for missing stamp.toml")
	}
}

func TestLoad_NoProjects(t *testing.T) {
	dir := t.TempDir()
	writeConfig(t, dir, "[config]\n")
	_, err := config.Load(dir)
	if err == nil {
		t.Fatal("expected error for config with no projects")
	}
}

func TestLoad_DuplicateProjectName(t *testing.T) {
	dir := t.TempDir()
	dup := `
[[projects]]
name = "app"
path = "."
version = "1.0.0"

[[projects]]
name = "app"
path = "other"
version = "2.0.0"
`
	writeConfig(t, dir, dup)
	_, err := config.Load(dir)
	if err == nil {
		t.Fatal("expected error for duplicate project name")
	}
}

func TestFindProject(t *testing.T) {
	dir := t.TempDir()
	writeConfig(t, dir, validTOML)
	cfg, _ := config.Load(dir)

	if p := cfg.FindProject("my-app"); p == nil {
		t.Error("expected to find my-app")
	}
	if p := cfg.FindProject("nonexistent"); p != nil {
		t.Error("expected nil for nonexistent project")
	}
}

func TestPublishDefaults(t *testing.T) {
	var pc config.PublishConfig
	if !pc.PublishTags() {
		t.Error("tags should default to true")
	}
	if !pc.PublishReleases() {
		t.Error("releases should default to true")
	}
}