use crate::Alignment;

use crate::db::{get_items, get_items_matching};
use crate::modes::common::ColumnType;
use crate::modes::common::{size_column, string_column};
use anyhow::anyhow;
use log::debug;
use prettytable::color;
use prettytable::row;
use prettytable::{Attr, Cell, Row, Table};

pub fn mode_list(
    cmd: &mut clap::Command,
    args: crate::Args,
    ids: &mut Vec<i64>,
    tags: &Vec<String>,
    conn: &mut rusqlite::Connection,
    data_path: std::path::PathBuf,
) -> anyhow::Result<()> {
    if !ids.is_empty() {
        cmd.error(
            clap::error::ErrorKind::InvalidValue,
            "ID given, you can only supply tags when using --list",
        )
        .exit();
    }

    let mut meta: std::collections::HashMap<String, String> = std::collections::HashMap::new();
    for item in args.item.meta.iter() {
        let item = item.clone();
        meta.insert(item.key, item.value);
    }

    let items = match tags.is_empty() && meta.is_empty() {
        true => get_items(conn)?,
        false => get_items_matching(conn, tags, &meta)?,
    };

    debug!("MAIN: Items: {:?}", items);

    let mut tags_by_item: std::collections::HashMap<i64, Vec<String>> =
        std::collections::HashMap::new();
    let mut meta_by_item: std::collections::HashMap<
        i64,
        std::collections::HashMap<String, String>,
    > = std::collections::HashMap::new();

    for item in items.iter() {
        let item_id = item.id.unwrap();

        let item_tags: Vec<String> = crate::db::get_item_tags(conn, item)?
            .into_iter()
            .map(|x| x.name)
            .collect();
        tags_by_item.insert(item_id, item_tags);

        let mut item_meta: std::collections::HashMap<String, String> =
            std::collections::HashMap::new();

        for meta in crate::db::get_item_meta(conn, item)? {
            item_meta.insert(meta.name.clone(), meta.value);
        }
        meta_by_item.insert(item_id, item_meta);
    }

    let mut table = Table::new();
    table.set_format(*prettytable::format::consts::FORMAT_CLEAN);

    let list_format = args.options.list_format.split(",");

    let mut title_row = row!();

    for column in list_format.clone() {
        let mut column_format = column.split(":");
        let column_name = column_format.next().expect("Unable to parse column name");
        let column_type = ColumnType::from_str(column_name)
            .map_err(|_| anyhow!("Unknown column {:?}", column_name))?;

        if column_type == ColumnType::Meta {
            let meta_name = column_format
                .next()
                .expect("Unable to parse metadata name for meta column");
            title_row.add_cell(Cell::new(meta_name).with_style(Attr::Bold));
        } else {
            title_row.add_cell(Cell::new(&column_type.to_string()).with_style(Attr::Bold));
        }
    }

    table.set_titles(title_row);

    for item in items {
        let item_id = item.id.unwrap();
        let tags = tags_by_item.get(&item_id).unwrap();
        let meta = meta_by_item.get(&item_id).unwrap();
        let mut item_path = data_path.clone();
        item_path.push(item.id.unwrap().to_string());

        let mut table_row = Row::new(vec![]);

        for column in list_format.clone() {
            let mut column_format = column.split(":");
            let column_name = column_format.next().expect("Unable to parse column name");
            let column_type = ColumnType::from_str(column_name)
                .unwrap_or_else(|_| panic!("Unknown column {:?}", column_name));
            let mut meta_name: Option<&str> = None;

            if column_type == ColumnType::Meta {
                meta_name = column_format.next();
            }

            let column_width: usize = match column_format.next() {
                Some(len) => len.parse().unwrap_or(0),
                None => 0,
            };

            let cell = match column_type {
                ColumnType::Id => Cell::new_align(
                    &string_column(item.id.unwrap_or(0).to_string(), column_width),
                    Alignment::RIGHT,
                ),
                ColumnType::Time => Cell::new(&string_column(
                    item.ts
                        .with_timezone(&chrono::Local)
                        .format("%F %T")
                        .to_string(),
                    column_width,
                )),
                ColumnType::Size => match item.size {
                    Some(size) => Cell::new_align(
                        &size_column(size as u64, args.options.human_readable, column_width),
                        Alignment::RIGHT,
                    ),
                    None => match item_path.metadata() {
                        Ok(_) => Cell::new_align("Unknown", Alignment::RIGHT)
                            .with_style(Attr::ForegroundColor(color::YELLOW))
                            .with_style(Attr::Bold),
                        Err(_) => Cell::new_align("Missing", Alignment::RIGHT)
                            .with_style(Attr::ForegroundColor(color::RED))
                            .with_style(Attr::Bold),
                    },
                },
                ColumnType::Compression => {
                    Cell::new(&string_column(item.compression.to_string(), column_width))
                },
                ColumnType::DigestType => {
                    Cell::new(&string_column(item.digest_type.to_string(), column_width))
                },
                ColumnType::DigestValue => {
                    match item.digest_value {
                        Some(ref value) => Cell::new(&string_column(value.to_string(), column_width)),
                        None => Cell::new("Missing")
                            .with_style(Attr::ForegroundColor(color::RED))
                            .with_style(Attr::Bold),
                    }
                },
                ColumnType::FileSize => match item_path.metadata() {
                    Ok(metadata) => Cell::new_align(
                        &size_column(
                            metadata.len(),
                            args.options.human_readable,
                            column_width,
                        ),
                        Alignment::RIGHT,
                    ),
                    Err(_) => Cell::new_align("Missing", Alignment::RIGHT)
                           .with_style(Attr::ForegroundColor(color::RED))
                           .with_style(Attr::Bold),
                },
                ColumnType::FilePath => Cell::new(&string_column(
                    item_path.clone().into_os_string().into_string().unwrap(),
                    column_width,
                )),
                ColumnType::Tags => Cell::new(&string_column(tags.join(" "), column_width)),
                ColumnType::Meta => match meta_name {
                    Some(meta_name) => match meta.get(meta_name) {
                        Some(meta_value) => {
                            Cell::new(&string_column(meta_value.to_string(), column_width))
                        }
                        None => Cell::new(""),
                    },
                    None => Cell::new(""),
                },
            };
            table_row.add_cell(cell);
        }
        table.add_row(table_row);
    }

    table.printstd();

    Ok(())
}

// These helper functions are needed for the mode_list function