use rome_formatter::{FormatContext, FormatResult, Formatted, IndentStyle, LineWidth, Printed};
use rome_formatter_test::TestFormatLanguage;
use rome_js_formatter::context::trailing_comma::TrailingComma;
use rome_js_formatter::context::{
    JsFormatContext, JsFormatOptions, QuoteProperties, QuoteStyle, Semicolons,
};
use rome_js_formatter::{format_node, format_range, JsFormatLanguage};
use rome_js_parser::parse;
use rome_js_syntax::{JsLanguage, SourceType};
use rome_parser::AnyParse;
use rome_rowan::SyntaxNode;
use rome_text_size::TextRange;
use serde::{Deserialize, Serialize};

pub struct JsTestFormatLanguage {
    source_type: SourceType,
}

impl JsTestFormatLanguage {
    pub fn new(source_type: SourceType) -> Self {
        JsTestFormatLanguage { source_type }
    }
}

impl TestFormatLanguage for JsTestFormatLanguage {
    type SyntaxLanguage = JsLanguage;
    type Options = JsFormatOptions;
    type Context = JsFormatContext;
    type FormatLanguage = JsFormatLanguage;

    fn parse(&self, text: &str) -> AnyParse {
        parse(text, self.source_type).into()
    }

    fn deserialize_format_options(
        &self,
        options: &str,
    ) -> Vec<<Self::Context as FormatContext>::Options> {
        let test_options: TestOptions = serde_json::from_str(options).unwrap();

        test_options
            .cases
            .into_iter()
            .map(|case| case.into_format_options(self.source_type))
            .collect()
    }

    fn format_node(
        &self,
        options: Self::Options,
        node: &SyntaxNode<Self::SyntaxLanguage>,
    ) -> FormatResult<Formatted<Self::Context>> {
        format_node(options, node)
    }

    fn format_range(
        &self,
        options: Self::Options,
        node: &SyntaxNode<Self::SyntaxLanguage>,
        range: TextRange,
    ) -> FormatResult<Printed> {
        format_range(options, node, range)
    }
}

#[derive(Debug, Eq, PartialEq, Clone, Copy, Deserialize, Serialize)]
pub enum JsSerializableIndentStyle {
    /// Tab
    Tab,
    /// Space, with its quantity
    Space(u8),
}

impl From<JsSerializableIndentStyle> for IndentStyle {
    fn from(test: JsSerializableIndentStyle) -> Self {
        match test {
            JsSerializableIndentStyle::Tab => IndentStyle::Tab,
            JsSerializableIndentStyle::Space(spaces) => IndentStyle::Space(spaces),
        }
    }
}

#[derive(Debug, Eq, PartialEq, Clone, Copy, Deserialize, Serialize)]
pub enum JsSerializableQuoteStyle {
    Double,
    Single,
}

impl From<JsSerializableQuoteStyle> for QuoteStyle {
    fn from(test: JsSerializableQuoteStyle) -> Self {
        match test {
            JsSerializableQuoteStyle::Double => QuoteStyle::Double,
            JsSerializableQuoteStyle::Single => QuoteStyle::Single,
        }
    }
}

#[derive(Debug, Eq, PartialEq, Clone, Copy, Deserialize, Serialize)]
pub enum JsSerializableQuoteProperties {
    AsNeeded,
    Preserve,
}

impl From<JsSerializableQuoteProperties> for QuoteProperties {
    fn from(test: JsSerializableQuoteProperties) -> Self {
        match test {
            JsSerializableQuoteProperties::AsNeeded => QuoteProperties::AsNeeded,
            JsSerializableQuoteProperties::Preserve => QuoteProperties::Preserve,
        }
    }
}

#[derive(Debug, Eq, PartialEq, Clone, Copy, Deserialize, Serialize)]
pub enum JsSerializableTrailingComma {
    All,
    ES5,
    None,
}

impl From<JsSerializableTrailingComma> for TrailingComma {
    fn from(test: JsSerializableTrailingComma) -> Self {
        match test {
            JsSerializableTrailingComma::All => TrailingComma::All,
            JsSerializableTrailingComma::ES5 => TrailingComma::ES5,
            JsSerializableTrailingComma::None => TrailingComma::None,
        }
    }
}

#[derive(Debug, Eq, PartialEq, Clone, Copy, Deserialize, Serialize)]
pub enum JsSerializableSemicolons {
    Always,
    AsNeeded,
}

impl From<JsSerializableSemicolons> for Semicolons {
    fn from(test: JsSerializableSemicolons) -> Self {
        match test {
            JsSerializableSemicolons::Always => Semicolons::Always,
            JsSerializableSemicolons::AsNeeded => Semicolons::AsNeeded,
        }
    }
}

#[derive(Debug, Deserialize, Serialize, Clone, Copy)]
pub struct JsSerializableFormatOptions {
    /// The indent style.
    pub indent_style: Option<JsSerializableIndentStyle>,

    /// What's the max width of a line. Defaults to 80.
    pub line_width: Option<u16>,

    /// The style for quotes. Defaults to double.
    pub quote_style: Option<JsSerializableQuoteStyle>,

    /// When properties in objects are quoted. Defaults to as-needed.
    pub quote_properties: Option<JsSerializableQuoteProperties>,

    /// Print trailing commas wherever possible in multi-line comma-separated syntactic structures. Defaults to "all".
    pub trailing_comma: Option<JsSerializableTrailingComma>,

    pub semicolons: Option<JsSerializableSemicolons>,
}

impl JsSerializableFormatOptions {
    fn into_format_options(self, source_type: SourceType) -> JsFormatOptions {
        JsFormatOptions::new(source_type)
            .with_indent_style(
                self.indent_style
                    .map_or_else(|| IndentStyle::Tab, |value| value.into()),
            )
            .with_line_width(
                self.line_width
                    .and_then(|width| LineWidth::try_from(width).ok())
                    .unwrap_or_default(),
            )
            .with_quote_style(
                self.quote_style
                    .map_or_else(|| QuoteStyle::Double, |value| value.into()),
            )
            .with_quote_properties(
                self.quote_properties
                    .map_or_else(|| QuoteProperties::AsNeeded, |value| value.into()),
            )
            .with_trailing_comma(
                self.trailing_comma
                    .map_or_else(|| TrailingComma::All, |value| value.into()),
            )
            .with_semicolons(
                self.semicolons
                    .map_or_else(|| Semicolons::Always, |value| value.into()),
            )
    }
}

#[derive(Debug, Deserialize, Serialize)]
struct TestOptions {
    cases: Vec<JsSerializableFormatOptions>,
}