#![allow(
    clippy::decimal_literal_representation,
    clippy::derive_partial_eq_without_eq,
    clippy::unreadable_literal,
    clippy::shadow_unrelated
)]

use indoc::indoc;
use serde::ser::SerializeMap;
use serde_derive::{Deserialize, Serialize};
use serde_yml::{Mapping, Number, Value};
use std::collections::BTreeMap;
use std::fmt::Debug;
use std::iter;

fn test_serde<T>(thing: &T, yaml: &str)
where
    T: serde::Serialize
        + serde::de::DeserializeOwned
        + PartialEq
        + Debug,
{
    let serialized = serde_yml::to_string(&thing).unwrap();
    assert_eq!(yaml, serialized);

    let value = serde_yml::to_value(thing).unwrap();
    let serialized = serde_yml::to_string(&value).unwrap();
    assert_eq!(yaml, serialized);

    let deserialized: T = serde_yml::from_str(yaml).unwrap();
    assert_eq!(*thing, deserialized);

    let value: Value = serde_yml::from_str(yaml).unwrap();
    let deserialized = T::deserialize(&value).unwrap();
    assert_eq!(*thing, deserialized);

    let deserialized: T = serde_yml::from_value(value).unwrap();
    assert_eq!(*thing, deserialized);

    serde_yml::from_str::<serde::de::IgnoredAny>(yaml).unwrap();
}

#[test]
fn test_default() {
    assert_eq!(Value::default(), Value::Null);
}

#[test]
fn test_int() {
    let thing = 256;
    let yaml = indoc! {"
        256
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_int_max_u64() {
    let thing = u64::MAX;
    let yaml = indoc! {"
        18446744073709551615
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_int_min_i64() {
    let thing = i64::MIN;
    let yaml = indoc! {"
        -9223372036854775808
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_int_max_i64() {
    let thing = i64::MAX;
    let yaml = indoc! {"
        9223372036854775807
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_i128_small() {
    let thing: i128 = -256;
    let yaml = indoc! {"
        -256
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_u128_small() {
    let thing: u128 = 256;
    let yaml = indoc! {"
        256
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_float() {
    let thing = 25.6;
    let yaml = indoc! {"
        25.6
    "};
    test_serde(&thing, yaml);

    let thing = 25.;
    let yaml = indoc! {"
        25.0
    "};
    test_serde(&thing, yaml);

    let thing = f64::INFINITY;
    let yaml = indoc! {"
        .inf
    "};
    test_serde(&thing, yaml);

    let thing = f64::NEG_INFINITY;
    let yaml = indoc! {"
        -.inf
    "};
    test_serde(&thing, yaml);

    let float: f64 = serde_yml::from_str(indoc! {"
        .nan
    "})
    .unwrap();
    assert!(float.is_nan());
}

#[test]
fn test_float32() {
    let thing: f32 = 25.5;
    let yaml = indoc! {"
        25.5
    "};
    test_serde(&thing, yaml);

    let thing = f32::INFINITY;
    let yaml = indoc! {"
        .inf
    "};
    test_serde(&thing, yaml);

    let thing = f32::NEG_INFINITY;
    let yaml = indoc! {"
        -.inf
    "};
    test_serde(&thing, yaml);

    let single_float: f32 = serde_yml::from_str(indoc! {"
        .nan
    "})
    .unwrap();
    assert!(single_float.is_nan());
}

#[test]
fn test_char() {
    let ch = '.';
    let yaml = indoc! {"
        '.'
    "};
    assert_eq!(yaml, serde_yml::to_string(&ch).unwrap());

    let ch = '#';
    let yaml = indoc! {"
        '#'
    "};
    assert_eq!(yaml, serde_yml::to_string(&ch).unwrap());

    let ch = '-';
    let yaml = indoc! {"
        '-'
    "};
    assert_eq!(yaml, serde_yml::to_string(&ch).unwrap());
}

#[test]
fn test_vec() {
    let thing = vec![1, 2, 3];
    let yaml = indoc! {"
        - 1
        - 2
        - 3
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_map() {
    let mut thing = BTreeMap::new();
    thing.insert("x".to_owned(), 1);
    thing.insert("y".to_owned(), 2);
    let yaml = indoc! {"
        x: 1
        'y': 2
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_map_key_value() {
    struct Map;

    impl serde::Serialize for Map {
        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
        where
            S: serde::Serializer,
        {
            // Test maps which do not serialize using serialize_entry.
            let mut map = serializer.serialize_map(Some(1))?;
            map.serialize_key("k")?;
            map.serialize_value("v")?;
            map.end()
        }
    }

    let yaml = indoc! {"
        k: v
    "};
    assert_eq!(yaml, serde_yml::to_string(&Map).unwrap());
}

#[test]
fn test_basic_struct() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct Basic {
        x: isize,
        y: String,
        z: bool,
    }
    let thing = Basic {
        x: -4,
        y: "hi\tquoted".to_owned(),
        z: true,
    };
    let yaml = indoc! {r#"
        x: -4
        'y': "hi\tquoted"
        z: true
    "#};
    test_serde(&thing, yaml);
}

#[test]
fn test_string_escapes() {
    let yaml = indoc! {"
        ascii
    "};
    test_serde(&"ascii".to_owned(), yaml);

    let yaml = indoc! {r#"
        "\0\a\b\t\n\v\f\r\e\"\\\N\L\P"
    "#};
    test_serde(
        &"\0\u{7}\u{8}\t\n\u{b}\u{c}\r\u{1b}\"\\\u{85}\u{2028}\u{2029}"
            .to_owned(),
        yaml,
    );

    let yaml = indoc! {r#"
        "\x1F\uFEFF"
    "#};
    test_serde(&"\u{1f}\u{feff}".to_owned(), yaml);

    let yaml = indoc! {"
        🎉
    "};
    test_serde(&"\u{1f389}".to_owned(), yaml);
}

#[test]
fn test_boolish_serialization() {
    // See https://yaml.org/type/bool.html
    let thing = vec![
        Value::String("y".to_owned()),
        Value::String("Y".to_owned()),
        Value::String("yes".to_owned()),
        Value::String("Yes".to_owned()),
        Value::String("YES".to_owned()),
        Value::String("n".to_owned()),
        Value::String("N".to_owned()),
        Value::String("no".to_owned()),
        Value::String("No".to_owned()),
        Value::String("NO".to_owned()),
        Value::String("true".to_owned()),
        Value::String("True".to_owned()),
        Value::String("TRUE".to_owned()),
        Value::String("false".to_owned()),
        Value::String("False".to_owned()),
        Value::String("FALSE".to_owned()),
        Value::String("on".to_owned()),
        Value::String("On".to_owned()),
        Value::String("ON".to_owned()),
        Value::String("off".to_owned()),
        Value::String("Off".to_owned()),
        Value::String("OFF".to_owned()),
        Value::Bool(true),
        Value::Bool(false),
    ];

    let yaml = indoc! {"
        - 'y'
        - 'Y'
        - 'yes'
        - 'Yes'
        - 'YES'
        - 'n'
        - 'N'
        - 'no'
        - 'No'
        - 'NO'
        - 'true'
        - 'True'
        - 'TRUE'
        - 'false'
        - 'False'
        - 'FALSE'
        - 'on'
        - 'On'
        - 'ON'
        - 'off'
        - 'Off'
        - 'OFF'
        - true
        - false
    "};

    test_serde(&thing, yaml);
}

#[test]
fn test_multiline_string() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct Struct {
        trailing_newline: String,
        no_trailing_newline: String,
    }
    let thing = Struct {
        trailing_newline: "aaa\nbbb\n".to_owned(),
        no_trailing_newline: "aaa\nbbb".to_owned(),
    };
    let yaml = indoc! {"
        trailing_newline: |
          aaa
          bbb
        no_trailing_newline: |-
          aaa
          bbb
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_strings_needing_quote() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct Struct {
        boolean: String,
        integer: String,
        void: String,
        leading_zeros: String,
    }
    let thing = Struct {
        boolean: "true".to_owned(),
        integer: "1".to_owned(),
        void: "null".to_owned(),
        leading_zeros: "007".to_owned(),
    };
    let yaml = indoc! {"
        boolean: 'true'
        integer: '1'
        void: 'null'
        leading_zeros: '007'
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_moar_strings_needing_quote() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct Struct {
        s: String,
    }

    for s in &[
        // Short hex values.
        "0x0",
        "0x1",
        // Long hex values that don't fit in a u64 need to be quoted.
        "0xffaed20B7B67e498A3bEEf97386ec1849EFeE6Ac",
        // "empty" strings.
        "",
        " ",
        // The norway problem https://hitchdev.com/strictyaml/why/implicit-typing-removed/
        "NO",
        "no",
        "No",
        "Yes",
        "YES",
        "yes",
        "True",
        "TRUE",
        "true",
        "False",
        "FALSE",
        "false",
        "y",
        "Y",
        "n",
        "N",
        "on",
        "On",
        "ON",
        "off",
        "Off",
        "OFF",
        "0",
        "1",
        "null",
        "Null",
        "NULL",
        "nil",
        "Nil",
        "NIL",
        // https://hitchdev.com/strictyaml/why/implicit-typing-removed/#string-or-float
        "9.3",
        // https://github.com/dtolnay/serde_yml/pull/398#discussion_r1432944356
        "2E234567",
        // https://yaml.org/spec/1.2.2/#1022-tag-resolution
        "0o7",
        "0x3A",
        "+12.3",
        "0.",
        "-0.0",
        "12e3",
        "-2E+05",
        "0",
        "-0",
        "3",
        "-19",
    ] {
        let thing = Struct { s: s.to_string() };
        let yaml = format!("s: '{}'\n", s);
        test_serde(&thing, &yaml);
    }
}
#[test]
fn test_nested_vec() {
    let thing = vec![vec![1, 2, 3], vec![4, 5, 6]];
    let yaml = indoc! {"
        - - 1
          - 2
          - 3
        - - 4
          - 5
          - 6
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_nested_struct() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct Outer {
        inner: Inner,
    }
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct Inner {
        v: u16,
    }
    let thing = Outer {
        inner: Inner { v: 512 },
    };
    let yaml = indoc! {"
        inner:
          v: 512
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_nested_enum() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    enum Outer {
        Inner(Inner),
    }
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    enum Inner {
        Unit,
    }
    let thing = Outer::Inner(Inner::Unit);
    let yaml = indoc! {"
        !Inner Unit
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_option() {
    let thing = vec![Some(1), None, Some(3)];
    let yaml = indoc! {"
        - 1
        - null
        - 3
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_unit() {
    let thing = vec![(), ()];
    let yaml = indoc! {"
        - null
        - null
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_unit_struct() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct Foo;
    let thing = Foo;
    let yaml = indoc! {"
        null
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_unit_variant() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    enum Variant {
        First,
        Second,
    }
    let thing = Variant::First;
    let yaml = indoc! {"
        First
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_newtype_struct() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct OriginalType {
        v: u16,
    }
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct NewType(OriginalType);
    let thing = NewType(OriginalType { v: 1 });
    let yaml = indoc! {"
        v: 1
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_newtype_variant() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    enum Variant {
        Size(usize),
    }
    let thing = Variant::Size(127);
    let yaml = indoc! {"
        !Size 127
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_tuple_variant() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    enum Variant {
        Rgb(u8, u8, u8),
    }
    let thing = Variant::Rgb(32, 64, 96);
    let yaml = indoc! {"
        !Rgb
        - 32
        - 64
        - 96
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_struct_variant() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    enum Variant {
        Color { r: u8, g: u8, b: u8 },
    }
    let thing = Variant::Color {
        r: 32,
        g: 64,
        b: 96,
    };
    let yaml = indoc! {"
        !Color
        r: 32
        g: 64
        b: 96
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_tagged_map_value() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct Bindings {
        profile: Profile,
    }
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    enum Profile {
        ClassValidator { class_name: String },
    }
    let thing = Bindings {
        profile: Profile::ClassValidator {
            class_name: "ApplicationConfig".to_owned(),
        },
    };
    let yaml = indoc! {"
        profile: !ClassValidator
          class_name: ApplicationConfig
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_value() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    pub(crate) struct GenericInstructions {
        #[serde(rename = "type")]
        pub(crate) typ: String,
        pub(crate) config: Value,
    }
    let thing = GenericInstructions {
        typ: "primary".to_string(),
        config: Value::Sequence(vec![
            Value::Null,
            Value::Bool(true),
            Value::Number(Number::from(65535)),
            Value::Number(Number::from(0.54321)),
            Value::String("s".into()),
            Value::Mapping(Mapping::new()),
        ]),
    };
    let yaml = indoc! {"
        type: primary
        config:
        - null
        - true
        - 65535
        - 0.54321
        - s
        - {}
    "};
    test_serde(&thing, yaml);
}

#[test]
fn test_mapping() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct Data {
        pub(crate) substructure: Mapping,
    }

    let mut thing = Data {
        substructure: Mapping::new(),
    };
    thing.substructure.insert(
        Value::String("a".to_owned()),
        Value::String("foo".to_owned()),
    );
    thing.substructure.insert(
        Value::String("b".to_owned()),
        Value::String("bar".to_owned()),
    );

    let yaml = indoc! {"
        substructure:
          a: foo
          b: bar
    "};

    test_serde(&thing, yaml);
}

#[test]
fn test_long_string() {
    #[derive(Serialize, Deserialize, PartialEq, Debug)]
    struct Data {
        pub(crate) string: String,
    }

    let thing = Data {
        string: iter::repeat(["word", " "])
            .flatten()
            .take(69)
            .collect(),
    };

    let yaml = indoc! {"
        string: word word word word word word word word word word word word word word word word word word word word word word word word word word word word word word word word word word word
    "};

    test_serde(&thing, yaml);
}