use nu_protocol::{Primitive, UntaggedValue, Value};
use nu_source::AnchorLocation;
use std::path::Path;

#[derive(Default)]
pub struct TextView;

impl TextView {
    pub fn new() -> TextView {
        TextView
    }
}

pub fn view_text_value(value: &Value) {
    let value_anchor = value.anchor();
    if let UntaggedValue::Primitive(Primitive::String(ref s)) = &value.value {
        if let Some(source) = value_anchor {
            let file_path: Option<String> = match source {
                AnchorLocation::File(file) => {
                    let path = Path::new(&file);
                    Some(path.to_string_lossy().to_string())
                }
                AnchorLocation::Url(url) => {
                    let url = url::Url::parse(&url);
                    if let Ok(url) = url {
                        if let Some(mut segments) = url.path_segments() {
                            if let Some(file) = segments.next_back() {
                                let path = Path::new(file);
                                Some(path.to_string_lossy().to_string())
                            } else {
                                None
                            }
                        } else {
                            None
                        }
                    } else {
                        None
                    }
                }
                //FIXME: this probably isn't correct
                AnchorLocation::Source(_source) => None,
            };

            match file_path {
                Some(file_path) => {
                    // Let bat do it's thing
                    bat::PrettyPrinter::new()
                        .input_from_bytes_with_name(s.as_bytes(), file_path)
                        .term_width(textwrap::termwidth())
                        .tab_width(Some(4))
                        .colored_output(true)
                        .true_color(true)
                        .header(true)
                        .line_numbers(true)
                        .grid(true)
                        .vcs_modification_markers(true)
                        .snip(true)
                        .wrapping_mode(bat::WrappingMode::NoWrapping)
                        .use_italics(true)
                        .paging_mode(bat::PagingMode::QuitIfOneScreen)
                        .pager("less")
                        .line_ranges(bat::line_range::LineRanges::all())
                        .highlight_range(0, 0)
                        .theme("OneHalfDark")
                        .print()
                        .expect("Error with bat PrettyPrint");
                }
                _ => {
                    bat::PrettyPrinter::new()
                        .input_from_bytes(s.as_bytes())
                        .term_width(textwrap::termwidth())
                        .tab_width(Some(4))
                        .colored_output(true)
                        .true_color(true)
                        .header(true)
                        .line_numbers(true)
                        .grid(true)
                        .vcs_modification_markers(true)
                        .snip(true)
                        .wrapping_mode(bat::WrappingMode::NoWrapping)
                        .use_italics(true)
                        .paging_mode(bat::PagingMode::QuitIfOneScreen)
                        .pager("less")
                        .line_ranges(bat::line_range::LineRanges::all())
                        .highlight_range(0, 0)
                        .theme("OneHalfDark")
                        .print()
                        .expect("Error with bat PrettyPrint");
                }
            }
        } else {
            bat::PrettyPrinter::new()
                .input_from_bytes(s.as_bytes())
                .term_width(textwrap::termwidth())
                .tab_width(Some(4))
                .colored_output(true)
                .true_color(true)
                .header(true)
                .line_numbers(true)
                .grid(true)
                .vcs_modification_markers(true)
                .snip(true)
                .wrapping_mode(bat::WrappingMode::NoWrapping)
                .use_italics(true)
                .paging_mode(bat::PagingMode::QuitIfOneScreen)
                .pager("less")
                .line_ranges(bat::line_range::LineRanges::all())
                .highlight_range(0, 0)
                .theme("OneHalfDark")
                .print()
                .expect("Error with bat PrettyPrint");
        }
    }
}