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//! # list_steps
//!
//! Lists all known tasks in multiple formats.
//!

#[cfg(test)]
#[path = "list_steps_test.rs"]
mod list_steps_test;

use crate::execution_plan;
use crate::io;
use crate::types::{Config, DeprecationInfo};
use std::collections::BTreeMap;

pub(crate) fn run(config: &Config, output_format: &str, output_file: &Option<String>) -> u32 {
    let (output, count) = create_list(&config, output_format);

    match output_file {
        Some(file) => {
            io::write_text_file(&file, &output);
            ()
        }
        None => print!("{}", output),
    }

    count
}

pub(crate) fn create_list(config: &Config, output_format: &str) -> (String, u32) {
    let mut count = 0;
    let mut buffer = String::new();

    let single_page_markdown = output_format == "markdown-single-page";
    let markdown = single_page_markdown
        || output_format == "markdown"
        || output_format == "markdown-sub-section";

    let mut categories = BTreeMap::new();

    if single_page_markdown {
        buffer.push_str(&format!("# Task List\n\n"));
    }

    for key in config.tasks.keys() {
        let task = execution_plan::get_normalized_task(&config, &key, true);

        let is_private = match task.private {
            Some(private) => private,
            None => false,
        };

        if !is_private {
            count = count + 1;

            let category = match task.category {
                Some(value) => value,
                None => "No Category".to_string(),
            };

            let description = match task.description {
                Some(value) => value,
                None => "No Description.".to_string(),
            };

            let deprecated_message = match task.deprecated {
                Some(deprecated) => match deprecated {
                    DeprecationInfo::Boolean(value) => {
                        if value {
                            " (deprecated)".to_string()
                        } else {
                            "".to_string()
                        }
                    }
                    DeprecationInfo::Message(ref message) => {
                        let mut buffer = " (deprecated - ".to_string();
                        buffer.push_str(message);
                        buffer.push_str(")");

                        buffer
                    }
                },
                None => "".to_string(),
            };

            let mut text = String::from(description);
            text.push_str(&deprecated_message);

            let mut tasks_map = BTreeMap::new();
            match categories.get_mut(&category) {
                Some(value) => tasks_map.append(value),
                _ => (),
            };

            tasks_map.insert(key.clone(), text.clone());
            categories.insert(category, tasks_map);
        }
    }

    let post_key = if markdown { "**" } else { "" };
    for (category, tasks) in &categories {
        if single_page_markdown {
            buffer.push_str(&format!("## {}\n\n", category));
        } else if markdown {
            buffer.push_str(&format!("#### {}\n\n", category));
        } else {
            buffer.push_str(&format!("{}\n----------\n", category));
        }

        for (key, description) in tasks {
            if markdown {
                buffer.push_str(&format!("* **"));
            }
            buffer.push_str(&format!("{}{} - {}\n", &key, &post_key, &description));
        }
        buffer.push_str(&format!("\n"));
    }

    (buffer, count)
}