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use std::collections::HashMap;
use crate::formats::archive::BinArchive;
use crate::formats::archive::BinArchiveReader;
use anyhow::{anyhow, Result};

pub struct TextData {
    title: String,
    entries: HashMap<String, String>
}

impl TextData {
    pub fn new() -> Self {
        TextData {
            title: String::new(),
            entries: HashMap::new()
        }
    }

    pub fn read(archive: &BinArchive) -> Result<Self> {
        let mut reader = BinArchiveReader::new(archive, 0);
        let mut entries: HashMap<String, String> = HashMap::new();
        let title = reader.read_shift_jis_string()?;
        while reader.tell() < archive.size() {
            match reader.read_label(0)? {
                Some(label) => {
                    let value = reader.read_utf16_string()?;
                    entries.insert(label, value);
                }
                None => {
                    return Err(anyhow!("Malformed message archive {}", title));
                }
            }
        }
        Ok(TextData {
            title,
            entries
        })
    }

    pub fn get_title(&self) -> &str {
        &self.title
    }

    pub fn set_title(&mut self, new_title: String) {
        self.title = new_title;
    }

    pub fn insert_or_overwrite(&mut self, key: String, value: String) {
        self.entries.insert(key, value);
    }

    pub fn get_entry(&self, key: &String) -> Option<&String> {
        self.entries.get(key)
    }

    pub fn delete_entry(&mut self, key: &String) {
        self.entries.remove(key);
    }
}