package speaker

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

func TestSpeakerForSourceMatchesBasenameCaseInsensitive(t *testing.T) {
	dir := t.TempDir()
	path := writeSpeakerMap(t, dir, `match:
  - speaker: "Eric Rakestraw"
    match:
      - "eric_rakestraw"
`)

	speakers, err := LoadMap(path)
	if err != nil {
		t.Fatalf("load speaker map: %v", err)
	}

	got, err := speakers.SpeakerForSource(filepath.Join(dir, "2026-04-19-Eric_Rakestraw.json"))
	if err != nil {
		t.Fatalf("resolve speaker: %v", err)
	}
	if got != "Eric Rakestraw" {
		t.Fatalf("speaker = %q, want %q", got, "Eric Rakestraw")
	}
}

func TestSpeakerForSourceUsesBasenameOnly(t *testing.T) {
	dir := t.TempDir()
	path := writeSpeakerMap(t, dir, `match:
  - speaker: "Directory Match"
    match:
      - "speaker-dir"
`)

	speakers, err := LoadMap(path)
	if err != nil {
		t.Fatalf("load speaker map: %v", err)
	}

	_, err = speakers.SpeakerForSource(filepath.Join(dir, "speaker-dir", "input.json"))
	if err == nil {
		t.Fatal("expected no match")
	}
	if !strings.Contains(err.Error(), `input.json`) {
		t.Fatalf("expected basename in error, got %v", err)
	}
}

func TestSpeakerForSourceUsesFirstMatchingRule(t *testing.T) {
	dir := t.TempDir()
	path := writeSpeakerMap(t, dir, `match:
  - speaker: "First"
    match:
      - "adam"
  - speaker: "Second"
    match:
      - "adam_rakestraw"
`)

	speakers, err := LoadMap(path)
	if err != nil {
		t.Fatalf("load speaker map: %v", err)
	}

	got, err := speakers.SpeakerForSource("2026-04-19-Adam_Rakestraw.json")
	if err != nil {
		t.Fatalf("resolve speaker: %v", err)
	}
	if got != "First" {
		t.Fatalf("speaker = %q, want %q", got, "First")
	}
}

func TestLoadMapValidation(t *testing.T) {
	tests := []struct {
		name    string
		content string
		want    string
	}{
		{
			name:    "missing top-level match",
			content: `inputs: {}`,
			want:    "must contain at least one match rule",
		},
		{
			name:    "empty match list",
			content: `match: []`,
			want:    "must contain at least one match rule",
		},
		{
			name: "empty speaker",
			content: `match:
  - speaker: ""
    match: ["eric"]
`,
			want: "must include speaker",
		},
		{
			name: "empty rule match list",
			content: `match:
  - speaker: "Eric"
    match: []
`,
			want: "must include at least one match string",
		},
		{
			name: "empty match string",
			content: `match:
  - speaker: "Eric"
    match: [" "]
`,
			want: "contains empty match string",
		},
		{
			name: "duplicate speaker",
			content: `match:
  - speaker: "Eric"
    match: ["eric"]
  - speaker: "Eric"
    match: ["rakestraw"]
`,
			want: `duplicate speaker "Eric"`,
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			dir := t.TempDir()
			path := writeSpeakerMap(t, dir, test.content)

			_, err := LoadMap(path)
			if err == nil {
				t.Fatal("expected error")
			}
			if !strings.Contains(err.Error(), test.want) {
				t.Fatalf("expected error to contain %q, got %v", test.want, err)
			}
		})
	}
}

func writeSpeakerMap(t *testing.T, dir string, content string) string {
	t.Helper()

	path := filepath.Join(dir, "speakers.yml")
	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
		t.Fatalf("write speaker map: %v", err)
	}
	return path
}