//! Tests ported from ../inshellah/test/test_inshellah.ml.
//!
//! Covers the help parser, manpage parser, groff stripping, and nushell
//! generation. The single .nu store parser test (`test_nu_file_parsing`) is
//! not included — it requires porting store.ml first.

use inshellah::parsers::help::help_parser;
use inshellah::parsers::manpage::{
    ManpageResult, OwnedParam, OwnedSwitch, extract_synopsis_command, parse_manpage_string,
    strip_groff_escapes,
};
use inshellah::parsers::nushell::{generate_extern, generate_module};
use inshellah::store::{json_of_result, parse_nu_completions, result_from_json};
use inshellah::types::{HelpResult, Param, Switch};

fn parse(txt: &str) -> HelpResult<'_> {
    match help_parser(txt) {
        Ok((_, r)) => r,
        Err(e) => panic!("parse_help failed: {e:?}"),
    }
}

// --- Help parser tests ---

#[test]
fn gnu_basic() {
    let r = parse("  -a, --all                  do not ignore entries starting with .\n");
    assert_eq!(r.entries.len(), 1);
    let e = &r.entries[0];
    assert!(matches!(&e.switch, Switch::Both('a', l) if *l == "all"));
    assert!(e.param.is_none());
    assert!(!e.desc.is_empty());
}

#[test]
fn gnu_eq_param() {
    let r = parse("      --block-size=SIZE      scale sizes by SIZE\n");
    assert_eq!(r.entries.len(), 1);
    let e = &r.entries[0];
    assert!(matches!(&e.switch, Switch::Long(l) if *l == "block-size"));
    assert!(matches!(&e.param, Some(Param::Mandatory(p)) if *p == "SIZE"));
}

#[test]
fn gnu_opt_param() {
    let r = parse("      --color[=WHEN]         color the output WHEN\n");
    assert_eq!(r.entries.len(), 1);
    let e = &r.entries[0];
    assert!(matches!(&e.switch, Switch::Long(l) if *l == "color"));
    assert!(matches!(&e.param, Some(Param::Optional(p)) if *p == "WHEN"));
}

#[test]
fn underscore_param() {
    let r = parse("      --time-style=TIME_STYLE  time/date format\n");
    assert_eq!(r.entries.len(), 1);
    let e = &r.entries[0];
    assert!(matches!(&e.param, Some(Param::Mandatory(p)) if *p == "TIME_STYLE"));
}

#[test]
fn short_only() {
    let r = parse("  -v                       verbose output\n");
    assert_eq!(r.entries.len(), 1);
    assert!(matches!(r.entries[0].switch, Switch::Short('v')));
}

#[test]
fn long_only() {
    let r = parse("      --help                 display help\n");
    assert_eq!(r.entries.len(), 1);
    assert!(matches!(&r.entries[0].switch, Switch::Long(l) if *l == "help"));
}

#[test]
fn multiline_desc() {
    let txt = "      --block-size=SIZE      with -l, scale sizes by SIZE when printing them;\n                               e.g., '--block-size=M'; see SIZE format below\n";
    let r = parse(txt);
    assert_eq!(r.entries.len(), 1);
    let combined: String = r.entries[0].desc.join(" ");
    assert!(combined.len() > 50, "desc was: {combined}");
}

#[test]
fn multiple_entries() {
    let txt = "  -a, --all                  do not ignore entries starting with .\n  -A, --almost-all           do not list implied . and ..\n      --author               with -l, print the author of each file\n";
    let r = parse(txt);
    assert_eq!(r.entries.len(), 3);
}

#[test]
fn clap_short_sections() {
    let txt = "INPUT OPTIONS:\n  -e, --regexp=PATTERN       A pattern to search for.\n  -f, --file=PATTERNFILE     Search for patterns from the given file.\nSEARCH OPTIONS:\n  -s, --case-sensitive       Search case sensitively.\n";
    let r = parse(txt);
    assert_eq!(r.entries.len(), 3);
    let e = &r.entries[0];
    assert!(matches!(&e.switch, Switch::Both('e', l) if *l == "regexp"));
    assert!(matches!(&e.param, Some(Param::Mandatory(p)) if *p == "PATTERN"));
}

#[test]
fn clap_long_style() {
    let txt = "  -H, --hidden\n          Include hidden directories and files.\n\n      --no-ignore\n          Do not respect ignore files.\n";
    let r = parse(txt);
    assert_eq!(r.entries.len(), 2);
    let e = &r.entries[0];
    assert!(matches!(&e.switch, Switch::Both('H', l) if *l == "hidden"));
    assert!(!e.desc.is_empty());
}

#[test]
fn clap_long_angle_param() {
    let txt = "      --nonprintable-notation <notation>\n          Set notation for non-printable characters.\n";
    let r = parse(txt);
    assert_eq!(r.entries.len(), 1);
    let e = &r.entries[0];
    assert!(matches!(&e.switch, Switch::Long(l) if *l == "nonprintable-notation"));
    assert!(matches!(&e.param, Some(Param::Mandatory(p)) if *p == "notation"));
}

#[test]
fn space_upper_param() {
    let r = parse("  -f, --foo FOO  foo help\n");
    assert_eq!(r.entries.len(), 1);
    let e = &r.entries[0];
    assert!(matches!(&e.switch, Switch::Both('f', l) if *l == "foo"));
    assert!(matches!(&e.param, Some(Param::Mandatory(p)) if *p == "FOO"));
}

#[test]
fn go_cobra_flags() {
    let txt = "Flags:\n  -D, --debug              Enable debug mode\n  -H, --host string        Daemon socket to connect to\n  -v, --version            Print version information\n";
    let r = parse(txt);
    assert_eq!(r.entries.len(), 3);
    let host = &r.entries[1];
    assert!(matches!(&host.switch, Switch::Both('H', l) if *l == "host"));
    assert!(matches!(&host.param, Some(Param::Mandatory(p)) if *p == "string"));
}

#[test]
fn go_cobra_subcommands() {
    let txt = "Common Commands:\n  run         Create and run a new container from an image\n  exec        Execute a command in a running container\n  build       Build an image from a Dockerfile\n";
    let r = parse(txt);
    assert!(
        !r.subcommands.is_empty(),
        "expected subcommands, got: {:?}",
        r.subcommands.len()
    );
}

#[test]
fn help_parser_ignores_value_enums_and_defaults() {
    let txt = r#"Usage: tar [OPTION...] [FILE]...

 Main operation mode:
  -c, --create               create a new archive

 Archive format selection:

  -H, --format=FORMAT        create archive of the given format

 FORMAT is one of the following:
    gnu                      GNU tar 1.13.x format
    oldgnu                   GNU format as per tar <= 1.12
    pax                      POSIX 1003.1-2001 (pax) format
    posix                    same as pax
    ustar                    POSIX 1003.1-1988 (ustar) format
    v7                       old V7 tar format

*This* tar defaults to:
--format=gnu -f- -b20 --quoting-style=escape
--rmt-command=/nix/store/example/libexec/rmt
"#;
    let r = parse(txt);
    assert!(
        r.subcommands.is_empty(),
        "enum values became subcommands: {:?}",
        r.subcommands.len()
    );
    assert!(
        !r.entries
            .iter()
            .any(|e| matches!(&e.switch, Switch::Long(l) if *l == "rmt-command")),
        "default lines should not become flags"
    );
    assert!(
        r.entries
            .iter()
            .any(|e| matches!(&e.switch, Switch::Both('H', l) if *l == "format")),
        "real option should still be parsed"
    );
}

#[test]
fn busybox_tab() {
    let r = parse("\t-1\tOne column output\n\t-a\tInclude names starting with .\n");
    assert_eq!(r.entries.len(), 2);
    assert!(matches!(r.entries[0].switch, Switch::Short('1')));
}

#[test]
fn no_debug_prints() {
    // the old ocaml parser had print_endline at module load time; this test
    // documents that no such side effects exist in the rust port.
    let _ = parse("  -v  verbose\n");
}

#[test]
fn slash_switch_separator() {
    let r = parse("  --verbose / -v             Increase verbosity\n");
    assert_eq!(r.entries.len(), 1);
    let e = &r.entries[0];
    assert!(matches!(&e.switch, Switch::Both('v', l) if *l == "verbose"));
    assert!(e.param.is_none());
    let combined: String = e.desc.join(" ");
    assert_eq!(combined.trim(), "Increase verbosity");
}

// --- Manpage parser tests ---

#[test]
fn manpage_tp_style() {
    let groff = r#".SH OPTIONS
.TP
\fB\-a\fR, \fB\-\-all\fR
do not ignore entries starting with .
.TP
\fB\-A\fR, \fB\-\-almost\-all\fR
do not list implied . and ..
.TP
\fB\-\-block\-size\fR=\fISIZE\fR
with \fB\-l\fR, scale sizes by SIZE
.SH AUTHOR
Written by someone.
"#;
    let r = parse_manpage_string(groff);
    assert_eq!(r.entries.len(), 3, "entries: {:?}", r.entries);
    assert!(matches!(&r.entries[0].switch, OwnedSwitch::Both('a', l) if l == "all"));
    assert!(!r.entries[0].desc.is_empty());
    assert!(matches!(&r.entries[2].switch, OwnedSwitch::Long(l) if l == "block-size"));
    assert!(matches!(&r.entries[2].param, Some(OwnedParam::Mandatory(p)) if p == "SIZE"));
}

#[test]
fn manpage_ip_style() {
    let groff = r#".SH OPTIONS
.IP "\fB\-k\fR, \fB\-\-insecure\fR"
Allow insecure connections.
.IP "\fB\-o\fR, \fB\-\-output\fR \fIfile\fR"
Write output to file.
.SH SEE ALSO
"#;
    let r = parse_manpage_string(groff);
    assert_eq!(r.entries.len(), 2, "entries: {:?}", r.entries);
    assert!(matches!(&r.entries[0].switch, OwnedSwitch::Both('k', l) if l == "insecure"));
}

#[test]
fn manpage_groff_stripping() {
    let s = strip_groff_escapes(r#"\fB\-\-color\fR[=\fIWHEN\fR]"#);
    // font escapes removed
    assert!(!(s.contains('f') && s.contains('B') && s.contains('\\')));
    // dashes converted
    assert!(s.contains('-'));
    let s2 = strip_groff_escapes(r#"\(aqhello\(aq"#);
    assert!(s2.contains('\''), "expected apostrophe in: {s2}");
}

#[test]
fn manpage_empty_options() {
    let groff = ".SH NAME\nfoo \\- does stuff\n.SH DESCRIPTION\nDoes stuff.\n";
    let r = parse_manpage_string(groff);
    assert_eq!(r.entries.len(), 0);
}

#[test]
fn manpage_nix3_style() {
    let groff = r#".SH Options
.SS Logging-related options
.IP "\(bu" 3
.UR #opt-verbose
\f(CR--verbose\fR
.UE
/ \f(CR-v\fR
.IP
Increase the logging verbosity level.
.IP "\(bu" 3
.UR #opt-quiet
\f(CR--quiet\fR
.UE
.IP
Decrease the logging verbosity level.
.SH SEE ALSO
"#;
    let r = parse_manpage_string(groff);
    assert_eq!(r.entries.len(), 2, "entries: {:?}", r.entries);
    assert!(matches!(&r.entries[0].switch, OwnedSwitch::Both('v', l) if l == "verbose"));
    assert!(!r.entries[0].desc.is_empty());
    assert!(matches!(&r.entries[1].switch, OwnedSwitch::Long(l) if l == "quiet"));
    assert!(!r.entries[1].desc.is_empty());
}

#[test]
fn manpage_nix3_with_params() {
    let groff = r#".SH Options
.IP "\(bu" 3
.UR #opt-arg
\f(CR--arg\fR
.UE
\fIname\fR \fIexpr\fR
.IP
Pass the value as the argument name to Nix functions.
.IP "\(bu" 3
.UR #opt-include
\f(CR--include\fR
.UE
/ \f(CR-I\fR \fIpath\fR
.IP
Add path to search path entries.
.IP
This option may be given multiple times.
.SH SEE ALSO
"#;
    let r = parse_manpage_string(groff);
    assert_eq!(r.entries.len(), 2, "entries: {:?}", r.entries);
    assert!(matches!(&r.entries[0].switch, OwnedSwitch::Long(l) if l == "arg"));
    assert!(r.entries[0].param.is_some());
    assert!(matches!(&r.entries[1].switch, OwnedSwitch::Both('I', l) if l == "include"));
    assert!(matches!(&r.entries[1].param, Some(OwnedParam::Mandatory(p)) if p == "path"));
}

#[test]
fn synopsis_subcommand() {
    let groff = r#".SH "SYNOPSIS"
.sp
.nf
\fBgit\fR \fBcommit\fR [\fB\-a\fR | \fB\-\-interactive\fR]
.fi
.SH "DESCRIPTION"
"#;
    let cmd = extract_synopsis_command(groff);
    assert_eq!(cmd.as_deref(), Some("git commit"));
}

#[test]
fn synopsis_standalone() {
    let groff = ".SH Synopsis\n.LP\n\\f(CRnix-build\\fR [\\fIpaths\\fR]\n.SH Description\n";
    let cmd = extract_synopsis_command(groff);
    assert_eq!(cmd.as_deref(), Some("nix-build"));
}

#[test]
fn synopsis_nix3() {
    let groff = ".SH Synopsis\n.LP\n\\f(CRnix run\\fR [\\fIoption\\fR] \\fIinstallable\\fR\n.SH Description\n";
    let cmd = extract_synopsis_command(groff);
    assert_eq!(cmd.as_deref(), Some("nix run"));
}

#[test]
fn italic_synopsis() {
    let groff = ".SH Synopsis\n.LP\n\\f(CRnix-env\\fR \\fIoperation\\fR [\\fIoptions\\fR] [\\fIarguments…\\fR]\n.SH Description\n";
    let cmd = extract_synopsis_command(groff);
    assert_eq!(cmd.as_deref(), Some("nix-env"));
}

#[test]
fn synopsis_italic_command_name() {
    // git-am.1 (and many other git manpages) put the entire command
    // invocation in italics: `\fIgit am\fR [...]`. should still resolve
    // to "git am" rather than treating it as a placeholder.
    let groff = ".SH \"SYNOPSIS\"\n.sp\n.nf\n\\fIgit am\\fR [\\-\\-signoff] [\\-\\-keep]\n.fi\n.SH \"DESCRIPTION\"\n";
    let cmd = extract_synopsis_command(groff);
    assert_eq!(cmd.as_deref(), Some("git am"));
}

// --- Font/dedup tests (only the font-spacing one is portable) ---

#[test]
fn font_boundary_spacing() {
    // \fB--max-results\fR\fIcount\fR should become "--max-results count"
    let s = strip_groff_escapes(r#"\fB\-\-max\-results\fR\fIcount\fR"#);
    assert!(s.contains("--max-results count"), "got: {s}");
    // \fB--color\fR[=\fIWHEN\fR] should NOT insert space before =
    let s2 = strip_groff_escapes(r#"\fB\-\-color\fR[=\fIWHEN\fR]"#);
    assert!(s2.contains("--color[=WHEN]"), "got: {s2}");
}

// --- COMMANDS section tests ---

#[test]
fn commands_section_subcommands() {
    let groff = r#".SH OPTIONS
.TP
\fB\-\-user\fR
Talk to the service manager of the calling user.
.TP
\fB\-\-system\fR
Talk to the service manager of the system.
.SH COMMANDS
.PP
\fBstart\fR \fIUNIT\fR\&...
.RS 4
Start (activate) one or more units.
.RE
.PP
\fBstop\fR \fIUNIT\fR\&...
.RS 4
Stop (deactivate) one or more units.
.RE
.PP
\fBreload\fR \fIUNIT\fR\&...
.RS 4
Asks all units to reload their configuration.
.RE
.SH SEE ALSO
"#;
    let r = parse_manpage_string(groff);
    assert_eq!(r.entries.len(), 2, "options entries: {:?}", r.entries);
    assert_eq!(r.subcommands.len(), 3, "subcommands: {:?}", r.subcommands);
    let names: Vec<&str> = r.subcommands.iter().map(|sc| sc.name.as_str()).collect();
    assert!(names.contains(&"start"));
    assert!(names.contains(&"stop"));
    assert!(names.contains(&"reload"));
    let start_sc = r.subcommands.iter().find(|sc| sc.name == "start").unwrap();
    assert!(!start_sc.desc.is_empty());
}

#[test]
fn commands_section_git_style_refs() {
    let groff = r#".SH OPTIONS
.TP
\fB\-\-version\fR
Show version.
.SH "GIT COMMANDS"
.SS "Main porcelain commands"
.PP
.BR git-add (1)
.RS 4
Add file contents to the index.
.RE
.PP
\fBgit-commit\fR(1)
.RS 4
Record changes to the repository.
.RE
"#;
    let r = parse_manpage_string(groff);
    let names: Vec<&str> = r.subcommands.iter().map(|sc| sc.name.as_str()).collect();
    assert!(
        names.contains(&"git-add"),
        "subcommands: {:?}",
        r.subcommands
    );
    assert!(
        names.contains(&"git-commit"),
        "subcommands: {:?}",
        r.subcommands
    );
    let add = r
        .subcommands
        .iter()
        .find(|sc| sc.name == "git-add")
        .unwrap();
    assert!(add.desc.contains("Add file contents"));
}

// --- Nushell generation tests ---

fn to_owned_result(r: &HelpResult<'_>) -> ManpageResult {
    r.into()
}

#[test]
fn nushell_basic() {
    let r = parse("  -a, --all                  do not ignore entries starting with .\n");
    let nu = generate_extern("ls", &to_owned_result(&r));
    assert!(nu.contains("export extern \"ls\""), "nu = {nu}");
    assert!(nu.contains("--all(-a)"), "nu = {nu}");
    assert!(nu.contains("# do not ignore"), "nu = {nu}");
}

#[test]
fn nushell_param_types() {
    let txt = "  -w, --width=COLS           set output width\n      --block-size=SIZE      scale sizes\n  -o, --output FILE          output file\n";
    let r = parse(txt);
    let nu = generate_extern("ls", &to_owned_result(&r));
    assert!(nu.contains("--width(-w): int"), "nu = {nu}");
    assert!(nu.contains("--block-size: string"), "nu = {nu}");
    assert!(nu.contains("--output(-o): path"), "nu = {nu}");
}

#[test]
fn nushell_subcommands() {
    let txt = "Common Commands:\n  run         Create and run a new container\n  exec        Execute a command\n\nFlags:\n  -D, --debug              Enable debug mode\n";
    let r = parse(txt);
    let nu = generate_extern("docker", &to_owned_result(&r));
    assert!(nu.contains("export extern \"docker\""), "nu = {nu}");
    assert!(nu.contains("--debug(-D)"), "nu = {nu}");
    assert!(nu.contains("export extern \"docker run\""), "nu = {nu}");
    assert!(nu.contains("export extern \"docker exec\""), "nu = {nu}");
}

#[test]
fn positional_order_survives_cache_and_generation() {
    let txt = "usage: git clone [<options>] [--] <repository> [directory]\n";
    let result = to_owned_result(&parse(txt));
    assert_eq!(
        result
            .positionals
            .iter()
            .map(|(name, _)| name.as_str())
            .collect::<Vec<_>>(),
        vec!["repository", "directory"]
    );

    let json = json_of_result("help", &result);
    let value = serde_json::from_str(&json).expect("cache json");
    let cached = result_from_json(&value);
    assert_eq!(
        cached
            .positionals
            .iter()
            .map(|(name, _)| name.as_str())
            .collect::<Vec<_>>(),
        vec!["repository", "directory"]
    );

    let nu = generate_extern("git clone", &cached);
    let repository = nu
        .find("repository: string")
        .expect("repository positional");
    let directory = nu.find("directory?: path").expect("directory positional");
    assert!(repository < directory, "nu = {nu}");
}

#[test]
fn nushell_from_manpage() {
    let groff = r#".SH OPTIONS
.TP
\fB\-a\fR, \fB\-\-all\fR
do not ignore entries starting with .
.TP
\fB\-\-block\-size\fR=\fISIZE\fR
scale sizes by SIZE
.SH AUTHOR
"#;
    let result = parse_manpage_string(groff);
    let nu = generate_extern("ls", &result);
    assert!(nu.contains("export extern \"ls\""), "nu = {nu}");
    assert!(nu.contains("--all(-a)"), "nu = {nu}");
    assert!(nu.contains("--block-size: string"), "nu = {nu}");
}

#[test]
fn nushell_module() {
    let r = parse("  -v, --verbose              verbose output\n");
    let nu = generate_module("myapp", &to_owned_result(&r));
    assert!(nu.contains("module myapp-completions"), "nu = {nu}");
    assert!(nu.contains("export extern \"myapp\""), "nu = {nu}");
    assert!(nu.contains("--verbose(-v)"), "nu = {nu}");
}

#[test]
fn dedup_entries_help() {
    let txt = "  -v, --verbose              verbose output\n  --verbose                  verbose mode\n  -v                         be verbose\n";
    let r = parse(txt);
    let nu = generate_extern("test", &to_owned_result(&r));
    let count = nu.matches("--verbose").count();
    assert_eq!(count, 1, "expected --verbose to appear once, nu = {nu}");
    assert!(nu.contains("--verbose(-v)"), "nu = {nu}");
}

#[test]
fn dedup_manpage_entries() {
    let groff = r#".SH OPTIONS
.TP
\fB\-v\fR, \fB\-\-verbose\fR
Be verbose.
.SH DESCRIPTION
Use \fB\-v\fR for verbose output.
Use \fB\-\-verbose\fR to see more.
"#;
    let result = parse_manpage_string(groff);
    let nu = generate_extern("test", &result);
    assert!(nu.contains("--verbose(-v)"), "nu = {nu}");
    let verbose_lines: Vec<&str> = nu.lines().filter(|l| l.contains("verbose")).collect();
    assert_eq!(
        verbose_lines.len(),
        1,
        "expected 1 verbose line, got: {verbose_lines:?}"
    );
}

#[test]
fn nu_file_parsing() {
    let nu_source = r#"module completions {

  # Unofficial CLI tool
  export extern mytool [
    --help(-h)                # Print help
    --version(-V)             # Print version
  ]

  # List all items
  export extern "mytool list" [
    --raw                     # Output as JSON
    --format(-f): string      # Output format
    --help(-h)                # Print help
    name?: string             # Filter by name
  ]

}

use completions *
"#;
    let r = parse_nu_completions("mytool", nu_source);
    assert_eq!(r.entries.len(), 2, "entries: {:?}", r.entries);
    assert!(
        !r.subcommands.is_empty(),
        "subcommands: {:?}",
        r.subcommands
    );
    assert!(r.subcommands.iter().any(|sc| sc.name == "list"));
    assert_eq!(r.description, "Unofficial CLI tool");

    let r2 = parse_nu_completions("mytool list", nu_source);
    assert_eq!(r2.entries.len(), 3, "list entries: {:?}", r2.entries);
    let has_format = r2
        .entries
        .iter()
        .any(|e| matches!(&e.switch, OwnedSwitch::Both('f', l) if l == "format"));
    assert!(
        has_format,
        "list should have --format(-f): {:?}",
        r2.entries
    );
    assert!(!r2.positionals.is_empty(), "list should have a positional");
}

#[test]
fn self_listing_detection() {
    let txt = r#"systemctl [OPTIONS...] COMMAND ...

Unit Commands:
  start UNIT...                       Start (activate) one or more units
  stop UNIT...                        Stop (deactivate) one or more units
  status [PATTERN...]                 Show runtime status

Options:
  --user                              Talk to the user service manager
  --system                            Talk to the system service manager
"#;
    let r = parse(txt);
    let has_start = r.subcommands.iter().any(|sc| sc.name == "start");
    assert!(
        has_start,
        "expected start in subcommands: {:?}",
        r.subcommands.iter().map(|sc| sc.name).collect::<Vec<_>>()
    );
    assert!(r.entries.len() >= 2);
}