package motion

import (
	"git.gophernest.net/azpect/TextEditor/internal/action"
	tea "github.com/charmbracelet/bubbletea"
)

// MoveToTop implements Motion (gg) - linewise
type MoveToTop struct{}

func (a MoveToTop) Execute(m action.Model) tea.Cmd {
	m.SetCursorY(0)
	m.ClampCursorX()
	return nil
}

func (a MoveToTop) Type() action.MotionType { return action.Linewise }

// MoveToBottom implements Motion (G) - linewise
type MoveToBottom struct{}

func (a MoveToBottom) Execute(m action.Model) tea.Cmd {
	m.SetCursorY(m.LineCount() - 1)
	m.ClampCursorX()
	return nil
}

func (a MoveToBottom) Type() action.MotionType { return action.Linewise }

// MoveToLineStart implements Motion (0) - charwise
type MoveToLineStart struct{}

func (a MoveToLineStart) Execute(m action.Model) tea.Cmd {
	m.SetCursorX(0)
	m.ClampCursorX()
	return nil
}

func (a MoveToLineStart) Type() action.MotionType { return action.Charwise }

// MoveToLineEnd implements Motion ($) - charwise
type MoveToLineEnd struct{}

func (a MoveToLineEnd) Execute(m action.Model) tea.Cmd {
	m.SetCursorX(len(m.Line(m.CursorY())))
	m.ClampCursorX()
	return nil
}

func (a MoveToLineEnd) Type() action.MotionType { return action.Charwise }

// MoveToLineContentStart implements Motion (_) - charwise
type MoveToLineContentStart struct{}

func (a MoveToLineContentStart) Execute(m action.Model) tea.Cmd {
	line := m.Line(m.CursorY())
	x := 0
	for x < len(line) {
		ch := line[x]
		if ch != ' ' && ch != '\t' {
			break
		}
		x++
	}

	// If we are on the last char, we overflew, back once
	if x == len(line) && x > 0 {
		x--
	}

	m.SetCursorX(x)
	return nil
}

func (a MoveToLineContentStart) Type() action.MotionType { return action.Charwise }