use anyhow::{anyhow, Result};
use std::io::{Write};

use crate::common::is_binary::is_binary;
use crate::config;
use crate::core::item_service::ItemService;
use clap::Command;
use is_terminal::IsTerminal;
use std::path::PathBuf;

pub fn mode_get(
    cmd: &mut Command,
    settings: &config::Settings,
    ids: &mut Vec<i64>,
    tags: &mut Vec<String>,
    conn: &mut rusqlite::Connection,
    data_path: PathBuf,
) -> Result<()> {
    if !ids.is_empty() && !tags.is_empty() {
        cmd.error(clap::error::ErrorKind::InvalidValue, "Both ID and tags given, you must supply exactly one ID or at least one tag when using --get").exit();
    } else if ids.len() > 1 {
        cmd.error(clap::error::ErrorKind::InvalidValue, "More than one ID given, you must supply exactly one ID or at least one tag when using --get").exit();
    }

    let mut meta: std::collections::HashMap<String, String> = std::collections::HashMap::new();
    // Collect metadata from environment variables
    for (key, value) in std::env::vars() {
        if key.starts_with("KEEP_META_") && key != "KEEP_META_PLUGINS" {
            let meta_name = key.strip_prefix("KEEP_META_").unwrap();
            meta.insert(meta_name.to_string(), value);
        }
    }

    let item_service = ItemService::new(data_path);
    let item_with_content =
        item_service.find_item(conn, ids, tags, &meta)
        .and_then(|item_with_meta| {
            let item_id = item_with_meta.item.id.unwrap();
            item_service.get_item_content(conn, item_id)
        })
        .map_err(|e| anyhow!("Unable to find matching item in database: {}", e))?;

    let content = &item_with_content.content;

    // Determine if we should detect binary data
    let mut detect_binary = !settings.force && std::io::stdout().is_terminal();

    if detect_binary {
        let meta_map = item_with_content.item_with_meta.meta_as_map();
        if let Some(binary_val) = meta_map.get("binary") {
            if binary_val == "false" {
                detect_binary = false;
            } else if binary_val == "true" {
                return Err(anyhow!(
                    "Refusing to output binary data to TTY, use --force to override"
                ));
            }
        }
    }

    if detect_binary && is_binary(content) {
        return Err(anyhow!(
            "Refusing to output binary data to TTY, use --force to override"
        ));
    }

    std::io::stdout().write_all(content)?;
    Ok(())
}