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use json;
use serde_json;
use std::io::prelude::*;
use std::fs::File;
use std::path::PathBuf;
use actions::*;
use knowledge::*;
const STATE_FILE: &'static str = "state.json";
const COMMAND_FILE: &'static str = "command.txt";
const PLACE_FILE: &'static str = "place.txt";
const KNOWLEDGE_FILE: &'static str = "knowledge-state.json";
pub fn read_file(working_dir: &PathBuf) -> Result<json::JsonValue, String> {
let state_path = working_dir.join(STATE_FILE);
let mut file = File::open(state_path.as_path()).map_err(|e| e.to_string())?;
let mut content = String::new();
file.read_to_string(&mut content).map_err(|e| e.to_string())?;
json::parse(content.as_ref()).map_err(|e| e.to_string())
}
pub fn write_action(working_dir: &PathBuf, is_place_phase: bool, action: Action) -> Result<(), String> {
let filename = if is_place_phase {
PLACE_FILE
}
else {
COMMAND_FILE
};
let full_filename = working_dir.join(filename);
let mut file = File::create(full_filename.as_path()).map_err(|e| e.to_string())?;
write!(file, "{}", action).map_err(|e| e.to_string())?;
println!("Making move: {}", action);
Ok(())
}
pub fn read_knowledge() -> Result<Knowledge, String> {
let mut file = File::open(KNOWLEDGE_FILE).map_err(|e| e.to_string())?;
let mut content = String::new();
file.read_to_string(&mut content).map_err(|e| e.to_string())?;
serde_json::from_str(content.as_ref()).map_err(|e| e.to_string())
}
pub fn write_knowledge(knowledge: &Knowledge) -> Result<(), String> {
let json = serde_json::to_string(knowledge).map_err(|e| e.to_string())?;
let mut file = File::create(KNOWLEDGE_FILE).map_err(|e| e.to_string())?;
write!(file, "{}", json).map_err(|e| e.to_string())?;
Ok(())
}
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