use warp_completer::ParsedTokensSnapshot;
use warp_completer::util::parse_current_commands_and_tokens;

use super::*;
use crate::test_utils::CompletionContext;

async fn mock_parsed_input_token(buffer_text: String) -> ParsedTokensSnapshot {
    warp_features::mark_initialized();
    let completion_context = CompletionContext::new();
    parse_current_commands_and_tokens(buffer_text, &completion_context).await
}

fn clear_all_token_descriptions(snapshot: &mut ParsedTokensSnapshot) {
    for token in snapshot.parsed_tokens.iter_mut() {
        token.token_description = None;
    }
}

async fn one_off_keyword_short_circuits() {
    let mut token = mock_parsed_input_token("sudo apt update".to_string()).await;
    let word_tokens_count = token.parsed_tokens.len();
    clear_all_token_descriptions(&mut token);
    assert!(is_likely_shell_command(&token, word_tokens_count).await);

    let mut token = mock_parsed_input_token("echo hello world".to_string()).await;
    let word_tokens_count = token.parsed_tokens.len();
    clear_all_token_descriptions(&mut token);
    assert!(is_likely_shell_command(&token, word_tokens_count).await);

    let mut token = mock_parsed_input_token("agy doctor".to_string()).await;
    let word_tokens_count = token.parsed_tokens.len();
    clear_all_token_descriptions(&mut token);
    assert!(is_likely_shell_command(&token, word_tokens_count).await);
}

async fn first_token_with_description_short_input_is_shell() {
    let token = mock_parsed_input_token("cargo --version".to_string()).await;
    assert!(is_likely_shell_command(&token, 2).await);
}

async fn no_descriptions_returns_false() {
    let mut token = mock_parsed_input_token("install --foo=bar baz".to_string()).await;
    let word_tokens_count = token.parsed_tokens.len();
    clear_all_token_descriptions(&mut token);
    assert!(!is_likely_shell_command(&token, word_tokens_count).await);
}

async fn shell_syntax_tokens_with_only_first_token_description() -> bool {
    let mut token = mock_parsed_input_token("git --foo=bar /path/to/file --baz".to_string()).await;
    let word_tokens_count = token.parsed_tokens.len();

    for (idx, token) in token.parsed_tokens.iter_mut().enumerate() {
        if idx != 0 {
            token.token_description = None;
        }
    }

    assert!(word_tokens_count >= 3);
    is_likely_shell_command(&token, word_tokens_count).await
}

async fn described_token_majority_below_v2_threshold() -> bool {
    let mut token = mock_parsed_input_token("cargo build --release --workspace".to_string()).await;
    let word_tokens_count = token.parsed_tokens.len();
    assert!(word_tokens_count >= 3);

    let description = token
        .parsed_tokens
        .iter()
        .find_map(|token| token.token_description.clone())
        .expect("test input should include at least one described token");
    for token in token.parsed_tokens.iter_mut() {
        token.token_description = Some(description.clone());
    }
    token
        .parsed_tokens
        .last_mut()
        .expect("test input should include tokens")
        .token_description = None;

    is_likely_shell_command(&token, word_tokens_count).await
}

async fn downloads_log_path_in_nl_prompt_is_shell() -> bool {
    let command_token = mock_parsed_input_token("cargo --version".to_string()).await;
    let command_description = command_token
        .parsed_tokens
        .first()
        .and_then(|token| token.token_description.clone())
        .expect("test input should include a described command token");

    let mut token = mock_parsed_input_token(
        "look at this /users/ewanlockwood/downloads/logs_58498936986".to_string(),
    )
    .await;
    let word_tokens_count = token.parsed_tokens.len();
    clear_all_token_descriptions(&mut token);
    token
        .parsed_tokens
        .first_mut()
        .expect("test input should include tokens")
        .token_description = Some(command_description);
    is_likely_shell_command(&token, word_tokens_count).await
}

async fn file_path_in_nl_prompt_is_shell() -> bool {
    let mut token =
        mock_parsed_input_token("look at this /users/foo/bar.log file".to_string()).await;
    let word_tokens_count = token.parsed_tokens.len();
    clear_all_token_descriptions(&mut token);
    is_likely_shell_command(&token, word_tokens_count).await
}

async fn majority_described_tokens_returns_true() {
    let token =
        mock_parsed_input_token("cargo build --release --workspace --all-features".to_string())
            .await;
    let word_tokens_count = token.parsed_tokens.len();
    assert!(is_likely_shell_command(&token, word_tokens_count).await);
}

// Cases where nld_heuristic_v1 and nld_heuristic_v2 should both mark input as shell.
#[cfg(all(feature = "nld_heuristic_v1", not(feature = "nld_heuristic_v2")))]
#[test]
fn test_is_likely_shell_command_one_off_keyword_short_circuits_true_for_nld_heuristic_v1() {
    futures::executor::block_on(one_off_keyword_short_circuits());
}

#[cfg(feature = "nld_heuristic_v2")]
#[test]
fn test_is_likely_shell_command_one_off_keyword_short_circuits_true_for_nld_heuristic_v2() {
    futures::executor::block_on(one_off_keyword_short_circuits());
}

#[cfg(all(feature = "nld_heuristic_v1", not(feature = "nld_heuristic_v2")))]
#[test]
fn test_is_likely_shell_command_first_token_with_description_short_input_true_for_nld_heuristic_v1()
{
    futures::executor::block_on(first_token_with_description_short_input_is_shell());
}

#[cfg(feature = "nld_heuristic_v2")]
#[test]
fn test_is_likely_shell_command_first_token_with_description_short_input_true_for_nld_heuristic_v2()
{
    futures::executor::block_on(first_token_with_description_short_input_is_shell());
}

#[cfg(all(feature = "nld_heuristic_v1", not(feature = "nld_heuristic_v2")))]
#[test]
fn test_is_likely_shell_command_majority_described_tokens_true_for_nld_heuristic_v1() {
    futures::executor::block_on(majority_described_tokens_returns_true());
}

#[cfg(feature = "nld_heuristic_v2")]
#[test]
fn test_is_likely_shell_command_majority_described_tokens_true_for_nld_heuristic_v2() {
    futures::executor::block_on(majority_described_tokens_returns_true());
}

// Cases where nld_heuristic_v1 and nld_heuristic_v2 should both not mark input as shell.
#[cfg(all(feature = "nld_heuristic_v1", not(feature = "nld_heuristic_v2")))]
#[test]
fn test_is_likely_shell_command_no_descriptions_false_for_nld_heuristic_v1() {
    futures::executor::block_on(no_descriptions_returns_false());
}

#[cfg(feature = "nld_heuristic_v2")]
#[test]
fn test_is_likely_shell_command_no_descriptions_false_for_nld_heuristic_v2() {
    futures::executor::block_on(no_descriptions_returns_false());
}

#[cfg(all(feature = "nld_heuristic_v1", not(feature = "nld_heuristic_v2")))]
#[test]
fn test_is_likely_shell_command_file_path_in_nl_prompt_false_for_nld_heuristic_v1() {
    futures::executor::block_on(async move {
        assert!(!file_path_in_nl_prompt_is_shell().await);
    });
}

#[cfg(feature = "nld_heuristic_v2")]
#[test]
fn test_is_likely_shell_command_file_path_in_nl_prompt_false_for_nld_heuristic_v2() {
    futures::executor::block_on(async move {
        assert!(!file_path_in_nl_prompt_is_shell().await);
    });
}

// Cases where nld_heuristic_v1 should mark input as shell and stricter
// nld_heuristic_v2 should not mark input as shell.
#[cfg(all(feature = "nld_heuristic_v1", not(feature = "nld_heuristic_v2")))]
#[test]
fn test_is_likely_shell_command_shell_syntax_votes_true_for_nld_heuristic_v1() {
    futures::executor::block_on(async move {
        assert!(shell_syntax_tokens_with_only_first_token_description().await);
    });
}

#[cfg(feature = "nld_heuristic_v2")]
#[test]
fn test_is_likely_shell_command_shell_syntax_does_not_vote_false_for_nld_heuristic_v2() {
    futures::executor::block_on(async move {
        assert!(!shell_syntax_tokens_with_only_first_token_description().await);
    });
}

#[cfg(all(feature = "nld_heuristic_v1", not(feature = "nld_heuristic_v2")))]
#[test]
fn test_is_likely_shell_command_described_token_majority_true_for_nld_heuristic_v1() {
    futures::executor::block_on(async move {
        assert!(described_token_majority_below_v2_threshold().await);
    });
}

#[cfg(feature = "nld_heuristic_v2")]
#[test]
fn test_is_likely_shell_command_described_token_majority_false_for_nld_heuristic_v2() {
    futures::executor::block_on(async move {
        assert!(!described_token_majority_below_v2_threshold().await);
    });
}

#[cfg(all(feature = "nld_heuristic_v1", not(feature = "nld_heuristic_v2")))]
#[test]
fn test_is_likely_shell_command_downloads_log_path_true_for_nld_heuristic_v1() {
    futures::executor::block_on(async move {
        assert!(downloads_log_path_in_nl_prompt_is_shell().await);
    });
}

#[cfg(feature = "nld_heuristic_v2")]
#[test]
fn test_is_likely_shell_command_downloads_log_path_false_for_nld_heuristic_v2() {
    futures::executor::block_on(async move {
        assert!(!downloads_log_path_in_nl_prompt_is_shell().await);
    });
}

// No inverse section is expected: nld_heuristic_v2 only removes shell-syntax
// voting and raises the command threshold, so it should not mark an input as
// shell when nld_heuristic_v1 does not.