package editor

import (
	"fmt"
	"log/slog"

	"code.chimeric.al/dwrz/wen/internal/editor/canvas"
	"code.chimeric.al/dwrz/wen/pkg/terminal/input"
)

func (e *Editor) bufferInput(in *input.Event) error {
	size, err := e.terminal.Size()
	if err != nil {
		return fmt.Errorf("failed to get terminal size: %w", err)
	}

	if in.Rune != input.Null {
		switch in.Rune {
		case input.Delete:
			e.active.Backspace()

		case 'q' & input.Control:
			e.prompt.Prompt("Quit? (y/n)", e.quit)

		case 's' & input.Control:
			if err := e.active.Save(); err != nil {
				e.prompt.SetText(fmt.Sprintf(
					"failed to save: %v", err,
				))
			} else {
				e.prompt.SetText("saved file")
			}

		case 'x' & input.Control:
			e.prompt.Prompt("Save as:", e.saveAs)

		default:
			e.active.Insert(in.Rune)
		}

		return nil
	}

	switch in.Key {
	case input.Down:
		e.active.CursorDown()

	case input.Left:
		e.active.CursorLeft()

	case input.Right:
		e.active.CursorRight()

	case input.Up:
		e.active.CursorUp()

	case input.End:
		e.active.CursorEnd()

	case input.Home:
		e.active.CursorHome()

	case input.PageDown:
		e.active.PageDown(int(size.Rows) - canvas.Bars)

	case input.PageUp:
		e.active.PageUp(int(size.Rows) - canvas.Bars)

	default:
		e.log.Debug("unrecognized input", slog.Any("input", in))
	}

	return nil
}

func (e *Editor) promptInput(event *input.Event) error {
	if event.Rune != input.Null {
		switch event.Rune {
		case input.Escape:
			e.prompt.Escape()

		case input.CarriageReturn:
			e.prompt.Complete()

		case input.Delete:
			e.prompt.Backspace()

		default:
			e.prompt.Insert(event.Rune)
		}

		return nil
	}

	switch event.Key {
	case input.Left:
		e.prompt.CursorLeft()

	case input.Right:
		e.prompt.CursorRight()

	case input.End:
		e.prompt.CursorEnd()

	case input.Home:
		e.prompt.CursorHome()

	default:
		e.log.Debug("unrecognized input", slog.Any("input", event))
	}

	return nil
}