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use crate::minecraft::logs::{LogFile, LogFileType};
use gio::subclass::prelude::*;
use glib::{ObjectExt, ParamFlags, ParamSpec, ParamSpecInt64, ParamSpecString, ToValue};
use once_cell::sync::Lazy;
use std::cell::{Cell, RefCell};
use std::path::PathBuf;
use time::OffsetDateTime;

pub const NAME: &str = "name";
pub const PATH: &str = "path";
pub const TYPE: &str = "type";
pub const MODIFIED: &str = "modified";

mod imp {
    use super::*;

    #[derive(Debug, Default)]
    pub struct GLogFile {
        pub name: RefCell<String>,
        pub path: RefCell<String>,
        pub _type: RefCell<String>,
        pub modified: Cell<i64>,
    }

    #[glib::object_subclass]
    impl ObjectSubclass for GLogFile {
        const NAME: &'static str = "GLogFile";
        type Type = super::GLogFile;
        type ParentType = glib::Object;
    }

    impl ObjectImpl for GLogFile {
        fn properties() -> &'static [glib::ParamSpec] {
            static PROPERTIES: Lazy<Vec<ParamSpec>> = Lazy::new(|| {
                vec![
                    ParamSpecString::new(NAME, "Name", "Name", None, ParamFlags::READWRITE),
                    ParamSpecString::new(PATH, "Path", "Path", None, ParamFlags::READWRITE),
                    ParamSpecString::new(TYPE, "Type", "Type", None, ParamFlags::READWRITE),
                    ParamSpecInt64::new(
                        MODIFIED,
                        "Modified",
                        "Modified",
                        -1,
                        i64::MAX,
                        -1,
                        ParamFlags::READWRITE,
                    ),
                ]
            });

            PROPERTIES.as_ref()
        }

        fn set_property(
            &self,
            _obj: &Self::Type,
            _id: usize,
            value: &glib::Value,
            pspec: &glib::ParamSpec,
        ) {
            match pspec.name() {
                NAME => *self.name.borrow_mut() = value.get().unwrap(),
                PATH => *self.path.borrow_mut() = value.get().unwrap(),
                TYPE => *self._type.borrow_mut() = value.get().unwrap(),
                MODIFIED => self.modified.set(value.get().unwrap()),
                prop => unimplemented!("Property {prop} not a member of GLogFile"),
            }
        }

        fn property(&self, _obj: &Self::Type, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
            match pspec.name() {
                NAME => self.name.borrow().to_value(),
                PATH => self.path.borrow().to_value(),
                TYPE => self._type.borrow().to_value(),
                MODIFIED => self.modified.get().to_value(),
                prop => unimplemented!("Property {prop} not a member of GLogFile"),
            }
        }
    }
}

glib::wrapper! {
    /// Glib object for [`LogFile`](crate::minecraft::logs::LogFile).
    pub struct GLogFile(ObjectSubclass<imp::GLogFile>);
}

impl GLogFile {
    /// Set 'name'.
    pub fn set_name(&self, value: String) {
        self.set_property(NAME, value);
    }

    /// Get 'name'.
    pub fn name(&self) -> String {
        self.property(NAME)
    }

    /// Set 'path'.
    pub fn set_path(&self, value: PathBuf) {
        self.set_property(PATH, value.to_string_lossy().to_string());
    }

    /// Get 'path'.
    pub fn path(&self) -> PathBuf {
        PathBuf::from(self.property::<String>(PATH))
    }

    /// Set 'type'.
    pub fn set_type(&self, value: LogFileType) {
        let value = match value {
            LogFileType::Plain => "plain",
            LogFileType::Compressed => "compressed",
        };
        self.set_property(PATH, value);
    }

    /// Get 'type'.
    pub fn _type(&self) -> LogFileType {
        let value = self.property::<String>(PATH);
        match value.as_str() {
            "plain" => LogFileType::Plain,
            "compressed" => LogFileType::Compressed,
            x => panic!("Unknown LogFileType '{x}'"),
        }
    }

    /// Set 'modified'.
    pub fn set_modified(&self, value: Option<OffsetDateTime>) {
        let value = value.map(|v| v.unix_timestamp()).unwrap_or(-1);
        self.set_property(MODIFIED, value);
    }

    /// Get 'modified'.
    /// Panics if an invalid timestamp was saved
    /// (Should not happen when converting from [LogFile](crate::minecraft::logs::LogFile), or using `set_modified()`).
    pub fn modified(&self) -> Option<OffsetDateTime> {
        let value = self.property::<i64>(MODIFIED);
        if value < 0 {
            None
        } else {
            Some(OffsetDateTime::from_unix_timestamp(value).unwrap())
        }
    }
}

impl From<LogFile> for GLogFile {
    fn from(log_file: LogFile) -> Self {
        let _type = match log_file._type {
            LogFileType::Plain => "plain",
            LogFileType::Compressed => "compressed",
        };

        glib::Object::new(&[
            (NAME, &log_file.name),
            (PATH, &log_file.path.to_string_lossy().to_string()),
            (TYPE, &_type),
        ])
        .unwrap()
    }
}

impl From<GLogFile> for LogFile {
    fn from(glog_file: GLogFile) -> Self {
        Self {
            name: glog_file.name(),
            path: glog_file.path(),
            _type: glog_file._type(),
            modified: None,
        }
    }
}