package theme

import (
	"fmt"
	"testing"
)

func TestLoadEmbeddedThemesJSON_LoadsExpectedThemes(t *testing.T) {
	themesJSON, err := LoadEmbeddedThemesJSON()
	if err != nil {
		t.Fatalf("LoadEmbeddedThemesJSON returned error: %v", err)
	}

	want := []string{"kanagawa", "kanagawa-dragon", "kanagawa-lotus"}
	for _, name := range want {
		th, ok := themesJSON[name]
		if !ok {
			t.Fatalf("expected embedded theme %q to be loaded", name)
		}
		if th.Name == "" {
			t.Fatalf("expected embedded theme %q to have a name", name)
		}
		if th.Line.BG == "" {
			t.Fatalf("expected embedded theme %q to include line background", name)
		}
	}
}

func TestMapEmbeddedThemeToEditorTheme_MapsStylesAndNormalizesSyntaxKeys(t *testing.T) {
	in := map[string]ThemeJSON{
		"custom": {
			Name:            "custom",
			Line:            ColorStyleJSON{FG: "#dddddd", BG: "#101010"},
			Background:      ColorStyleJSON{BG: "#101010"},
			VisualHighlight: ColorStyleJSON{BG: "#202020"},
			Cursors: CursorJSON{
				Normal:  ColorStyleJSON{FG: "#101010", BG: "#dddddd"},
				Insert:  ColorStyleJSON{FG: "#101010", BG: "#cccccc"},
				Command: ColorStyleJSON{FG: "#101010", BG: "#bbbbbb"},
				Replace: ColorStyleJSON{FG: "#101010", BG: "#aaaaaa"},
			},
			Gutter: GutterJSON{
				Default:     ColorStyleJSON{FG: "#666666", BG: "#0a0a0a"},
				CurrentLine: ColorStyleJSON{FG: "#eeeeee", BG: "#0a0a0a"},
			},
			StatusBar: StatusBarJSON{
				Default: ColorStyleJSON{FG: "#cccccc", BG: "#0a0a0a"},
			},
			CommandLine: CommandLineJSON{
				Error:           ColorStyleJSON{FG: "#ff0000", BG: "#101010"},
				OutputBorder:    ColorStyleJSON{FG: "#dddddd", BG: "#0a0a0a"},
				ContinueMessage: ColorStyleJSON{FG: "#00aaff", BG: "#101010"},
			},
			Syntax: SyntaxJSON{
				Group: map[string]string{
					"  String ": "#00ff00",
				},
				Exact: map[string]string{
					" @KEYWORD.Return ": "#ff00ff",
				},
			},
		},
	}

	out := MapEmbeddedThemeToEditorTheme(in)
	th, ok := out["custom"]
	if !ok {
		t.Fatalf("expected mapped theme with key %q", "custom")
	}

	if got := colorHex(th.Line.GetForeground()); got != "#dddddd" {
		t.Fatalf("line fg mismatch: got %q want %q", got, "#dddddd")
	}
	if got := colorHex(th.Line.GetBackground()); got != "#101010" {
		t.Fatalf("line bg mismatch: got %q want %q", got, "#101010")
	}

	if got := colorHex(th.Syntax.Exact["keyword.return"].GetForeground()); got != "#ff00ff" {
		t.Fatalf("exact capture fg mismatch: got %q want %q", got, "#ff00ff")
	}
	if got := colorHex(th.Syntax.Exact["keyword.return"].GetBackground()); got != "#101010" {
		t.Fatalf("exact capture bg mismatch: got %q want %q", got, "#101010")
	}
	if got := colorHex(th.Syntax.Group["string"].GetForeground()); got != "#00ff00" {
		t.Fatalf("group capture fg mismatch: got %q want %q", got, "#00ff00")
	}

	if got := colorHex(th.CommandLine.Error.GetForeground()); got != "#ff0000" {
		t.Fatalf("command error fg mismatch: got %q want %q", got, "#ff0000")
	}
}

func colorHex(c any) string {
	return fmt.Sprint(c)
}