use super::markup::Alignment;
use crate::export::markup::MarkupExporter;

#[derive(Default)]
pub struct OrgmodeExporter {}

impl MarkupExporter for OrgmodeExporter {
    fn table_row(&self, cells: &[&str]) -> String {
        format!(
            "| {}  |  {} |\n",
            cells.first().unwrap(),
            &cells[1..].join(" |  ")
        )
    }

    fn table_divider(&self, cell_aligmnents: &[Alignment]) -> String {
        format!("|{}--|\n", "--+".repeat(cell_aligmnents.len() - 1))
    }

    fn command(&self, cmd: &str) -> String {
        format!("={}=", cmd)
    }
}

/// Check Emacs org-mode data row formatting
#[test]
fn test_orgmode_formatter_table_data() {
    let exporter = OrgmodeExporter::default();

    let actual = exporter.table_row(&["a", "b", "c"]);
    let expect = "| a  |  b |  c |\n";

    assert_eq!(expect, actual);
}

/// Check Emacs org-mode horizontal line formatting
#[test]
fn test_orgmode_formatter_table_line() {
    let exporter = OrgmodeExporter::default();

    let actual = exporter.table_divider(&[
        Alignment::Left,
        Alignment::Left,
        Alignment::Left,
        Alignment::Left,
        Alignment::Left,
    ]);
    let expect = "|--+--+--+--+--|\n";

    assert_eq!(expect, actual);
}

/// Test helper function to create unit-based header and horizontal line
/// independently from the markup functionality for Emacs org-mode.
#[cfg(test)]
fn cfg_test_table_header(unit_short_name: String) -> String {
    format!(
        "| Command  |  Mean [{unit}] |  Min [{unit}] |  Max [{unit}] |  Relative |\n|--+--+--+--+--|\n",
        unit = unit_short_name
    )
}

/// Ensure the Emacs org-mode output includes the table header and the multiple
/// benchmark results as a table. The list of actual times is not included
/// in the output.
///
/// This also demonstrates that the first entry's units (ms) are used to set
/// the units for all entries when the time unit is not given.
#[test]
fn test_orgmode_format_ms() {
    use super::Exporter;
    use crate::benchmark::benchmark_result::BenchmarkResult;
    use std::collections::BTreeMap;

    let exporter = OrgmodeExporter::default();

    let results = vec![
        BenchmarkResult {
            command: String::from("sleep 0.1"),
            command_with_unused_parameters: String::from("sleep 0.1"),
            mean: 0.1057,
            stddev: Some(0.0016),
            median: 0.1057,
            user: 0.0009,
            system: 0.0011,
            min: 0.1023,
            max: 0.1080,
            times: Some(vec![0.1, 0.1, 0.1]),
            exit_codes: vec![Some(0), Some(0), Some(0)],
            parameters: BTreeMap::new(),
        },
        BenchmarkResult {
            command: String::from("sleep 2"),
            command_with_unused_parameters: String::from("sleep 2"),
            mean: 2.0050,
            stddev: Some(0.0020),
            median: 2.0050,
            user: 0.0009,
            system: 0.0012,
            min: 2.0020,
            max: 2.0080,
            times: Some(vec![2.0, 2.0, 2.0]),
            exit_codes: vec![Some(0), Some(0), Some(0)],
            parameters: BTreeMap::new(),
        },
    ];

    let actual = String::from_utf8(exporter.serialize(&results, None).unwrap()).unwrap();
    let expect = format!(
        "{}\
| =sleep 0.1=  |  105.7 ± 1.6 |  102.3 |  108.0 |  1.00 |
| =sleep 2=  |  2005.0 ± 2.0 |  2002.0 |  2008.0 |  18.97 ± 0.29 |
",
        cfg_test_table_header("ms".to_string())
    );

    assert_eq!(expect, actual);
}

/// This test demonstrates that the given unit (s) is used to set
/// the units for all entries.
#[test]
fn test_orgmode_format_s() {
    use super::Exporter;
    use crate::benchmark::benchmark_result::BenchmarkResult;
    use crate::util::units::Unit;
    use std::collections::BTreeMap;

    let exporter = OrgmodeExporter::default();

    let results = vec![
        BenchmarkResult {
            command: String::from("sleep 2"),
            command_with_unused_parameters: String::from("sleep 2"),
            mean: 2.0050,
            stddev: Some(0.0020),
            median: 2.0050,
            user: 0.0009,
            system: 0.0012,
            min: 2.0020,
            max: 2.0080,
            times: Some(vec![2.0, 2.0, 2.0]),
            exit_codes: vec![Some(0), Some(0), Some(0)],
            parameters: BTreeMap::new(),
        },
        BenchmarkResult {
            command: String::from("sleep 0.1"),
            command_with_unused_parameters: String::from("sleep 0.1"),
            mean: 0.1057,
            stddev: Some(0.0016),
            median: 0.1057,
            user: 0.0009,
            system: 0.0011,
            min: 0.1023,
            max: 0.1080,
            times: Some(vec![0.1, 0.1, 0.1]),
            exit_codes: vec![Some(0), Some(0), Some(0)],
            parameters: BTreeMap::new(),
        },
    ];

    let actual =
        String::from_utf8(exporter.serialize(&results, Some(Unit::Second)).unwrap()).unwrap();
    let expect = format!(
        "{}\
| =sleep 2=  |  2.005 ± 0.002 |  2.002 |  2.008 |  18.97 ± 0.29 |
| =sleep 0.1=  |  0.106 ± 0.002 |  0.102 |  0.108 |  1.00 |
",
        cfg_test_table_header("s".to_string())
    );

    assert_eq!(expect, actual);
}