package pages

import (
	"testing"
)

// ── matchSurface tests ──────────────────────────────────────

func TestMatchSurface_StaticRoot(t *testing.T) {
	surfaces := []any{
		map[string]any{"path": "/", "title": "Dashboard"},
		map[string]any{"path": "/submit", "title": "Submit"},
	}
	s, params := matchSurface(surfaces, "/")
	if s == nil {
		t.Fatal("expected match for /")
	}
	if s["title"] != "Dashboard" {
		t.Errorf("expected Dashboard, got %v", s["title"])
	}
	if len(params) != 0 {
		t.Errorf("expected no params, got %v", params)
	}
}

func TestMatchSurface_StaticPath(t *testing.T) {
	surfaces := []any{
		map[string]any{"path": "/", "title": "Dashboard"},
		map[string]any{"path": "/submit", "title": "Submit"},
		map[string]any{"path": "/monitor", "title": "Monitor"},
	}
	s, _ := matchSurface(surfaces, "/submit")
	if s == nil {
		t.Fatal("expected match for /submit")
	}
	if s["title"] != "Submit" {
		t.Errorf("expected Submit, got %v", s["title"])
	}
}

func TestMatchSurface_ParamPath(t *testing.T) {
	surfaces := []any{
		map[string]any{"path": "/", "title": "Dashboard"},
		map[string]any{"path": "/:id", "title": "Detail"},
	}
	s, params := matchSurface(surfaces, "/abc123")
	if s == nil {
		t.Fatal("expected match for /:id")
	}
	if s["title"] != "Detail" {
		t.Errorf("expected Detail, got %v", s["title"])
	}
	if params["id"] != "abc123" {
		t.Errorf("expected id=abc123, got %v", params["id"])
	}
}

func TestMatchSurface_MultiSegmentParam(t *testing.T) {
	surfaces := []any{
		map[string]any{"path": "/monitor", "title": "Monitor"},
		map[string]any{"path": "/monitor/:id", "title": "Instance Detail"},
	}
	s, params := matchSurface(surfaces, "/monitor/inst-42")
	if s == nil {
		t.Fatal("expected match for /monitor/:id")
	}
	if s["title"] != "Instance Detail" {
		t.Errorf("expected Instance Detail, got %v", s["title"])
	}
	if params["id"] != "inst-42" {
		t.Errorf("expected id=inst-42, got %v", params["id"])
	}
}

func TestMatchSurface_NoMatch(t *testing.T) {
	surfaces := []any{
		map[string]any{"path": "/", "title": "Dashboard"},
		map[string]any{"path": "/submit", "title": "Submit"},
	}
	s, _ := matchSurface(surfaces, "/nonexistent/deep")
	if s != nil {
		t.Errorf("expected no match, got %v", s)
	}
}

func TestMatchSurface_StaticPreferredOverParam(t *testing.T) {
	surfaces := []any{
		map[string]any{"path": "/:id", "title": "Detail"},
		map[string]any{"path": "/new", "title": "New"},
	}
	s, params := matchSurface(surfaces, "/new")
	if s == nil {
		t.Fatal("expected match for /new")
	}
	if s["title"] != "New" {
		t.Errorf("expected static match 'New', got %v", s["title"])
	}
	if len(params) != 0 {
		t.Errorf("expected no params for static match, got %v", params)
	}
}

func TestMatchSurface_EmptySurfaces(t *testing.T) {
	s, _ := matchSurface([]any{}, "/")
	if s != nil {
		t.Errorf("expected no match for empty surfaces, got %v", s)
	}
}

// ── splitPath tests ─────────────────────────────────────────

func TestSplitPath(t *testing.T) {
	tests := []struct {
		input string
		want  int
	}{
		{"/", 0},
		{"/submit", 1},
		{"/monitor/:id", 2},
		{"/:id/edit", 2},
	}
	for _, tt := range tests {
		parts := splitPath(tt.input)
		if len(parts) != tt.want {
			t.Errorf("splitPath(%q) = %d parts, want %d", tt.input, len(parts), tt.want)
		}
	}
}

// ── findNavSurface tests ────────────────────────────────────

func TestFindNavSurface_ExplicitNav(t *testing.T) {
	surfaces := []any{
		map[string]any{"path": "/", "title": "Dashboard"},
		map[string]any{"path": "/monitor", "title": "Monitor", "nav": true},
	}
	s := findNavSurface(surfaces)
	if s == nil {
		t.Fatal("expected nav surface")
	}
	if s["title"] != "Monitor" {
		t.Errorf("expected Monitor, got %v", s["title"])
	}
}

func TestFindNavSurface_FallbackRoot(t *testing.T) {
	surfaces := []any{
		map[string]any{"path": "/submit", "title": "Submit"},
		map[string]any{"path": "/", "title": "Dashboard"},
	}
	s := findNavSurface(surfaces)
	if s == nil {
		t.Fatal("expected nav surface")
	}
	if s["title"] != "Dashboard" {
		t.Errorf("expected Dashboard, got %v", s["title"])
	}
}

func TestFindNavSurface_NoMatch(t *testing.T) {
	surfaces := []any{
		map[string]any{"path": "/submit", "title": "Submit"},
		map[string]any{"path": "/admin", "title": "Admin"},
	}
	s := findNavSurface(surfaces)
	if s != nil {
		t.Errorf("expected nil, got %v", s)
	}
}

// ── evaluateAccess tests ────────────────────────────────────
// Note: evaluateAccess depends on gin.Context which is hard to unit test
// without a full Gin setup. These are covered via handler integration tests.
// The matchSurface + splitPath + findNavSurface functions above are the
// pure-logic components that benefit most from unit testing.