use ggemtext::line::{
    code::{Inline, Multiline},
    header::{Header, Level},
    link::Link,
    list::List,
    quote::Quote,
};

use glib::{TimeZone, Uri, UriFlags};
use std::fs;

#[test]
fn gemtext() {
    match fs::read_to_string("tests/integration.gmi") {
        Ok(gemtext) => {
            // Init tags collection
            let mut code_inline: Vec<Inline> = Vec::new();
            let mut code_multiline: Vec<Multiline> = Vec::new();
            let mut header: Vec<Header> = Vec::new();
            let mut link: Vec<Link> = Vec::new();
            let mut list: Vec<List> = Vec::new();
            let mut quote: Vec<Quote> = Vec::new();

            // Define preformatted buffer
            let mut code_multiline_buffer: Option<Multiline> = None;

            // Define base URI as integration.gmi contain one relative link
            let base = match Uri::parse("gemini://geminiprotocol.net", UriFlags::NONE) {
                Ok(uri) => Some(uri),
                Err(_) => None,
            };

            // Define timezone as integration.gmi contain one links with date
            let timezone = Some(TimeZone::local());

            // Parse document by line
            for line in gemtext.lines() {
                // Inline code
                if let Some(result) = Inline::from(line) {
                    code_inline.push(result);
                    continue;
                }

                // Multiline code
                match code_multiline_buffer {
                    None => {
                        if let Some(code) = Multiline::begin_from(line) {
                            code_multiline_buffer = Some(code);
                            continue;
                        }
                    }
                    Some(ref mut result) => {
                        assert!(Multiline::continue_from(result, line).is_ok());
                        if result.completed {
                            code_multiline.push(code_multiline_buffer.take().unwrap());
                            code_multiline_buffer = None;
                        }
                        continue;
                    }
                };

                // Header
                if let Some(result) = Header::from(line) {
                    header.push(result);
                    continue;
                }

                // Link
                if let Some(result) = Link::from(line, base.as_ref(), timezone.as_ref()) {
                    link.push(result);
                    continue;
                }

                // List
                if let Some(result) = List::from(line) {
                    list.push(result);
                    continue;
                }

                // Quote
                if let Some(result) = Quote::from(line) {
                    quote.push(result);
                    continue;
                }
            }

            // Validate inline code
            assert_eq!(code_inline.len(), 1);
            assert_eq!(code_inline.get(0).unwrap().value, "inline code");

            // Validate multiline code
            assert_eq!(code_multiline.len(), 2);

            {
                let item = code_multiline.get(0).unwrap();
                assert_eq!(item.alt.clone().unwrap(), "alt text");
                assert_eq!(item.value.lines().count(), 2);
                assert_eq!(item.value.lines().nth(0).unwrap(), "multi");
                assert_eq!(item.value.lines().nth(1).unwrap(), "    preformatted line");
            } // #1

            {
                let item = code_multiline.get(1).unwrap();
                assert_eq!(item.alt.clone(), None);
                assert_eq!(item.value.lines().count(), 2);
                assert_eq!(item.value.lines().nth(0).unwrap(), "alt-less");
                assert_eq!(item.value.lines().nth(1).unwrap(), "    preformatted line");
            } // #2

            // Validate headers
            assert_eq!(header.len(), 3);

            fn to_i8(level: &Level) -> i8 {
                match level {
                    Level::H1 => 1,
                    Level::H2 => 2,
                    Level::H3 => 3,
                }
            } // comparison helper

            {
                let item = header.get(0).unwrap();

                assert_eq!(to_i8(&item.level), to_i8(&Level::H1));
                assert_eq!(item.value, "H1");
            } // #1

            {
                let item = header.get(1).unwrap();

                assert_eq!(to_i8(&item.level), to_i8(&Level::H2));
                assert_eq!(item.value, "H2");
            } // #2

            {
                let item = header.get(2).unwrap();

                assert_eq!(to_i8(&item.level), to_i8(&Level::H3));
                assert_eq!(item.value, "H3");
            } // #3

            // Validate links
            assert_eq!(link.len(), 6);

            {
                let item = link.get(0).unwrap();

                assert_eq!(item.alt, None);
                assert_eq!(item.timestamp, None);
                assert_eq!(item.uri.to_str(), "gemini://geminiprotocol.net");
            } // #1

            {
                let item = link.get(1).unwrap();

                assert_eq!(item.alt, None);

                let timestamp = item.timestamp.clone().unwrap();
                assert_eq!(timestamp.year(), 1965);
                assert_eq!(timestamp.month(), 01);
                assert_eq!(timestamp.day_of_month(), 19);

                assert_eq!(item.uri.to_str(), "gemini://geminiprotocol.net");
            } // #2

            {
                let item = link.get(2).unwrap();

                assert_eq!(item.alt.clone().unwrap(), "Gemini");
                assert_eq!(item.timestamp, None);
                assert_eq!(item.uri.to_str(), "gemini://geminiprotocol.net");
            } // #3

            {
                let item = link.get(3).unwrap();

                assert_eq!(item.alt.clone().unwrap(), "Gemini");

                let timestamp = item.timestamp.clone().unwrap();
                assert_eq!(timestamp.year(), 1965);
                assert_eq!(timestamp.month(), 01);
                assert_eq!(timestamp.day_of_month(), 19);

                assert_eq!(item.uri.to_str(), "gemini://geminiprotocol.net");
            } // #4

            {
                let item = link.get(4).unwrap();

                assert_eq!(item.alt.clone().unwrap(), "Gemini");

                let timestamp = item.timestamp.clone().unwrap();
                assert_eq!(timestamp.year(), 1965);
                assert_eq!(timestamp.month(), 01);
                assert_eq!(timestamp.day_of_month(), 19);

                assert_eq!(
                    item.uri.to_str(),
                    "gemini://geminiprotocol.net/docs/gemtext.gmi"
                );
            } // #5

            {
                let item = link.get(5).unwrap();

                assert_eq!(item.alt, None);
                assert_eq!(item.timestamp, None);
                assert_eq!(item.uri.to_str(), "gemini://geminiprotocol.net");
            } // #6

            // Validate lists
            assert_eq!(list.len(), 2);
            assert_eq!(list.get(0).unwrap().value, "Listing item 1");
            assert_eq!(list.get(1).unwrap().value, "Listing item 2");

            // Validate quotes
            assert_eq!(quote.len(), 1);
            assert_eq!(quote.get(0).unwrap().value, "quoted string");
        }
        // Could not load gemtext file
        Err(_) => {
            assert!(false);
        }
    }
}