package action

import tea "github.com/charmbracelet/bubbletea"

// DeleteChar implements Action (x)
type DeleteChar struct {
	Count int
}

// DeleteChar.Execute: Deletes Count characters at the cursor position (x key).
func (a DeleteChar) Execute(m Model) tea.Cmd {
	win := m.ActiveWindow()
	buf := m.ActiveBuffer()

	pos := win.Cursor.Col
	line := buf.Lines[win.Cursor.Line]
	for i := 0; i < a.Count && pos < len(line); i++ {
		line = line[:pos] + line[pos+1:]
		buf.SetLine(win.Cursor.Line, line)
	}

	return nil
}

// DeleteChar.WithCount: Returns a new DeleteChar with the given count.
func (a DeleteChar) WithCount(n int) Action {
	return DeleteChar{Count: n}
}

// DeleteToEndOfLine implements Action (D) - deletes from cursor to end of line
// and optionally Count-1 additional lines below.
type DeleteToEndOfLine struct {
	Count int
}

// DeleteToEndOfLine.Execute: Deletes from cursor to end of line and Count-1 lines below (D key).
func (a DeleteToEndOfLine) Execute(m Model) tea.Cmd {
	win := m.ActiveWindow()
	buf := m.ActiveBuffer()

	// Delete to end of line
	pos := win.Cursor.Col
	line := buf.Lines[win.Cursor.Line]

	buf.SetLine(win.Cursor.Line, line[:pos])
	win.SetCursorCol(pos - 1)

	// If count is greater, than we will delete the next N - 1 lines below
	initY := win.Cursor.Line
	if a.Count > 1 {
		// Copied from `internal/operator/delete.go`
		opCount := min(a.Count-1, buf.LineCount()-win.Cursor.Line)

		// Down one
		win.SetCursorLine(initY + 1)

		for range opCount {
			y := win.Cursor.Line // Changed from the copied code

			// Stop if were on the starting line
			if y == initY {
				break
			}
			buf.DeleteLine(y)

			if buf.LineCount() == 0 {
				buf.InsertLine(0, "")
			}

			if y >= buf.LineCount() {
				y = buf.LineCount() - 1
			}

			win.SetCursorLine(y)
		}
	}

	win.SetCursorLine(initY)

	return nil
}

// DeleteToEndOfLine.WithCount: Returns a new DeleteToEndOfLine with the given count.
func (a DeleteToEndOfLine) WithCount(n int) Action {
	return DeleteToEndOfLine{Count: n}
}