import x.json2

pub struct PartialEmoji {
pub:
    id       ?int
    name     string
    animated bool
}

pub fn PartialEmoji.parse(j json2.Any) !PartialEmoji {
    match j {
        map[string]json2.Any {
            return PartialEmoji{
                id:       if s := j['id'] {
                    if s !is json2.Null {
                        ?int(s.int())
                    } else {
                        none
                    }
                } else {
                    none
                }
                name:     j['name']! as string
                animated: if b := j['animated'] {
                    b as bool
                } else {
                    false
                }
            }
        }
        else {
            return error('expected partial emoji to be object, got ${j.type_name()}')
        }
    }
}

pub enum ButtonStyle {
    primary = 1
    secondary
    success
    danger
    link
}

pub struct Button {
pub:
    style     ButtonStyle = .secondary
    label     ?string
    emoji     ?PartialEmoji
    custom_id ?string
    url       ?string
    disabled  ?bool
}

pub fn Button.parse(j json2.Any) !Button {
    match j {
        map[string]json2.Any {
            return Button{
                style:     unsafe { ButtonStyle(j['style']!.int()) }
                label:     if s := j['label'] {
                    ?string(s as string)
                } else {
                    none
                }
                emoji:     if o := j['emoji'] {
                    dump(PartialEmoji.parse(o)!)
                    ?PartialEmoji(PartialEmoji.parse(o)!)
                } else {
                    none
                }
                custom_id: if s := j['custom_id'] {
                    ?string(s as string)
                } else {
                    none
                }
                url:       if s := j['url'] {
                    ?string(s as string)
                } else {
                    none
                }
                disabled:  if b := j['disabled'] {
                    ?bool(b as bool)
                } else {
                    none
                }
            }
        }
        else {
            return error('expected button to be object, got ${j.type_name()}')
        }
    }
}

fn test_main() {
    assert Button.parse({
        'style': json2.Any(2)
    }) or { panic('That case should not return error: ${err}') } == Button{
        style: .secondary
    }
}