// status.rs

//

// Copyright 2020, Georges Racinet <georges.racinets@octobus.net>

//

// This software may be used and distributed according to the terms of the

// GNU General Public License version 2 or any later version.

use crate::error::CommandError;

use crate::ui::Ui;

use crate::utils::path_utils::RelativizePaths;

use clap::{Arg, SubCommand};

use format_bytes::format_bytes;

use hg;

use hg::config::Config;

use hg::dirstate::has_exec_bit;

use hg::dirstate::status::StatusPath;

use hg::dirstate::TruncatedTimestamp;

use hg::dirstate::RANGE_MASK_31BIT;

use hg::errors::{HgError, IoResultExt};

use hg::lock::LockError;

use hg::manifest::Manifest;

use hg::matchers::AlwaysMatcher;

use hg::repo::Repo;

use hg::utils::files::get_bytes_from_os_string;

use hg::utils::files::get_bytes_from_path;

use hg::utils::files::get_path_from_bytes;

use hg::utils::hg_path::{hg_path_to_path_buf, HgPath};

use hg::StatusOptions;

use log::info;

use std::io;

use std::path::PathBuf;

pub const HELP_TEXT: &str = "

Show changed files in the working directory

This is a pure Rust version of `hg status`.

Some options might be missing, check the list below.

";

pub fn args() -> clap::App<'static, 'static> {

    SubCommand::with_name("status")

        .alias("st")

        .about(HELP_TEXT)

        .arg(

            Arg::with_name("all")

                .help("show status of all files")

                .short("-A")

                .long("--all"),

        )

        .arg(

            Arg::with_name("modified")

                .help("show only modified files")

                .short("-m")

                .long("--modified"),

        )

        .arg(

            Arg::with_name("added")

                .help("show only added files")

                .short("-a")

                .long("--added"),

        )

        .arg(

            Arg::with_name("removed")

                .help("show only removed files")

                .short("-r")

                .long("--removed"),

        )

        .arg(

            Arg::with_name("clean")

                .help("show only clean files")

                .short("-c")

                .long("--clean"),

        )

        .arg(

            Arg::with_name("deleted")

                .help("show only deleted files")

                .short("-d")

                .long("--deleted"),

        )

        .arg(

            Arg::with_name("unknown")

                .help("show only unknown (not tracked) files")

                .short("-u")

                .long("--unknown"),

        )

        .arg(

            Arg::with_name("ignored")

                .help("show only ignored files")

                .short("-i")

                .long("--ignored"),

        )

        .arg(

            Arg::with_name("copies")

                .help("show source of copied files (DEFAULT: ui.statuscopies)")

                .short("-C")

                .long("--copies"),

        )

        .arg(

            Arg::with_name("no-status")

                .help("hide status prefix")

                .short("-n")

                .long("--no-status"),

        )

}

/// Pure data type allowing the caller to specify file states to display

#[derive(Copy, Clone, Debug)]

pub struct DisplayStates {

    pub modified: bool,

    pub added: bool,

    pub removed: bool,

    pub clean: bool,

    pub deleted: bool,

    pub unknown: bool,

    pub ignored: bool,

}

pub const DEFAULT_DISPLAY_STATES: DisplayStates = DisplayStates {

    modified: true,

    added: true,

    removed: true,

    clean: false,

    deleted: true,

    unknown: true,

    ignored: false,

};

pub const ALL_DISPLAY_STATES: DisplayStates = DisplayStates {

    modified: true,

    added: true,

    removed: true,

    clean: true,

    deleted: true,

    unknown: true,

    ignored: true,

};

impl DisplayStates {

    pub fn is_empty(&self) -> bool {

        !(self.modified

            || self.added

            || self.removed

            || self.clean

            || self.deleted

            || self.unknown

            || self.ignored)

    }

}

pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {

    // TODO: lift these limitations

    if invocation.config.get_bool(b"ui", b"tweakdefaults")? {

        return Err(CommandError::unsupported(

            "ui.tweakdefaults is not yet supported with rhg status",

        ));

    }

    if invocation.config.get_bool(b"ui", b"statuscopies")? {

        return Err(CommandError::unsupported(

            "ui.statuscopies is not yet supported with rhg status",

        ));

    }

    if invocation

        .config

        .get(b"commands", b"status.terse")

        .is_some()

    {

        return Err(CommandError::unsupported(

            "status.terse is not yet supported with rhg status",

        ));

    }

    let ui = invocation.ui;

    let config = invocation.config;

    let args = invocation.subcommand_args;

    let verbose = !ui.plain(None)

        && !args.is_present("print0")

        && (config.get_bool(b"ui", b"verbose")?

            || config.get_bool(b"commands", b"status.verbose")?);

    if verbose {

        return Err(CommandError::unsupported(

            "verbose status is not supported yet",

        ));

    }

    let all = args.is_present("all");

    let display_states = if all {

        // TODO when implementing `--quiet`: it excludes clean files

        // from `--all`

        ALL_DISPLAY_STATES

    } else {

        let requested = DisplayStates {

            modified: args.is_present("modified"),

            added: args.is_present("added"),

            removed: args.is_present("removed"),

            clean: args.is_present("clean"),

            deleted: args.is_present("deleted"),

            unknown: args.is_present("unknown"),

            ignored: args.is_present("ignored"),

        };

        if requested.is_empty() {

            DEFAULT_DISPLAY_STATES

        } else {

            requested

        }

    };

    let no_status = args.is_present("no-status");

    let list_copies = all

        || args.is_present("copies")

        || config.get_bool(b"ui", b"statuscopies")?;

    let repo = invocation.repo?;

    if repo.has_sparse() || repo.has_narrow() {

        return Err(CommandError::unsupported(

            "rhg status is not supported for sparse checkouts or narrow clones yet"

        ));

    }

    let mut dmap = repo.dirstate_map_mut()?;

    let options = StatusOptions {

        // we're currently supporting file systems with exec flags only

        // anyway

        check_exec: true,

        list_clean: display_states.clean,

        list_unknown: display_states.unknown,

        list_ignored: display_states.ignored,

        list_copies,

        collect_traversed_dirs: false,

    };

    let (mut ds_status, pattern_warnings) = dmap.status(

        &AlwaysMatcher,

        repo.working_directory_path().to_owned(),

        ignore_files(repo, config),

        options,

    )?;

    for warning in pattern_warnings {

        match warning {

            hg::PatternFileWarning::InvalidSyntax(path, syntax) => ui

                .write_stderr(&format_bytes!(

                    b"{}: ignoring invalid syntax '{}'\n",

                    get_bytes_from_path(path),

                    &*syntax

                ))?,

            hg::PatternFileWarning::NoSuchFile(path) => {

                let path = if let Ok(relative) =

                    path.strip_prefix(repo.working_directory_path())

                {

                    relative

                } else {

                    &*path

                };

                ui.write_stderr(&format_bytes!(

                    b"skipping unreadable pattern file '{}': \

                      No such file or directory\n",

                    get_bytes_from_path(path),

                ))?

            }

        }

    }

    for (path, error) in ds_status.bad {

        let error = match error {

            hg::BadMatch::OsError(code) => {

                std::io::Error::from_raw_os_error(code).to_string()

            }

            hg::BadMatch::BadType(ty) => {

                format!("unsupported file type (type is {})", ty)

            }

        };

        ui.write_stderr(&format_bytes!(

            b"{}: {}\n",

            path.as_bytes(),

            error.as_bytes()

        ))?

    }

    if !ds_status.unsure.is_empty() {

        info!(

            "Files to be rechecked by retrieval from filelog: {:?}",

            ds_status.unsure.iter().map(|s| &s.path).collect::<Vec<_>>()

        );

    }

    let mut fixup = Vec::new();

    if !ds_status.unsure.is_empty()

        && (display_states.modified || display_states.clean)

    {

        let p1 = repo.dirstate_parents()?.p1;

        let manifest = repo.manifest_for_node(p1).map_err(|e| {

            CommandError::from((e, &*format!("{:x}", p1.short())))

        })?;

        for to_check in ds_status.unsure {

            if unsure_is_modified(repo, &manifest, &to_check.path)? {

                if display_states.modified {

                    ds_status.modified.push(to_check);

                }

            } else {

                if display_states.clean {

                    ds_status.clean.push(to_check.clone());

                }

                fixup.push(to_check.path.into_owned())

            }

        }

    }

    let relative_paths = (!ui.plain(None))

        && config

            .get_option(b"commands", b"status.relative")?

            .unwrap_or(config.get_bool(b"ui", b"relative-paths")?);

    let output = DisplayStatusPaths {

        ui,

        no_status,

        relativize: if relative_paths {

            Some(RelativizePaths::new(repo)?)

        } else {

            None

        },

    };

    if display_states.modified {

        output.display(b"M ", "status.modified", ds_status.modified)?;

    }

    if display_states.added {

        output.display(b"A ", "status.added", ds_status.added)?;

    }

    if display_states.removed {

        output.display(b"R ", "status.removed", ds_status.removed)?;

    }

    if display_states.deleted {

        output.display(b"! ", "status.deleted", ds_status.deleted)?;

    }

    if display_states.unknown {

        output.display(b"? ", "status.unknown", ds_status.unknown)?;

    }

    if display_states.ignored {

        output.display(b"I ", "status.ignored", ds_status.ignored)?;

    }

    if display_states.clean {

        output.display(b"C ", "status.clean", ds_status.clean)?;

    }

    let mut dirstate_write_needed = ds_status.dirty;

    let filesystem_time_at_status_start =

        ds_status.filesystem_time_at_status_start;

    if (fixup.is_empty() || filesystem_time_at_status_start.is_none())

        && !dirstate_write_needed

    {

        // Nothing to update

        return Ok(());

    }

    // Update the dirstate on disk if we can