//! Integration tests for signal-gateway-code-tool.
//!
//! These tests exercise the GitHub tarball download and file browsing functionality
//! against a real public repository at a pinned commit.

use signal_gateway_code_tool::{CodeTool, CodeToolConfig, GitHubRepo, ShaCallback, Source};
use std::sync::Arc;

/// Test against cbeck88/ver-stub-rs at a known commit.
/// This is a public repo, so no token is needed.
const TEST_OWNER: &str = "cbeck88";
const TEST_REPO: &str = "ver-stub-rs";
const TEST_SHA: &str = "79b98e25f27ae4f5dd73a5a3d8f37dad655a57e8";

fn create_test_repo_code() -> CodeTool {
    create_test_repo_code_with_glob(vec![])
}

fn create_test_repo_code_with_glob(glob: Vec<String>) -> CodeTool {
    let config = CodeToolConfig {
        name: "test-app".to_string(),
        source: Source::GitHub {
            repo: GitHubRepo {
                owner: TEST_OWNER.to_string(),
                repo: TEST_REPO.to_string(),
            },
            token_file: None, // Public repo, no auth needed
        },
        glob,
        include_non_utf8: false,
        summary_file: None,
    };

    let sha = TEST_SHA.to_string();
    let sha_callback: ShaCallback = Arc::new(move || {
        let sha = sha.clone();
        Box::pin(async move { Ok(sha) })
    });

    CodeTool::new(config, sha_callback).expect("Failed to create CodeTool")
}

#[tokio::test]
async fn test_ls_root() {
    let app = create_test_repo_code();

    let result = app.ls(None).await.expect("ls failed");

    // Verify expected top-level entries exist
    assert!(result.contains("Cargo.toml"), "Should contain Cargo.toml");
    assert!(result.contains("README.md"), "Should contain README.md");
    assert!(
        result.contains("ver-stub/"),
        "Should contain ver-stub/ directory"
    );
    assert!(
        result.contains("ver-stub-build/"),
        "Should contain ver-stub-build/ directory"
    );
    assert!(result.contains("tests.sh"), "Should contain tests.sh");
}

#[tokio::test]
async fn test_ls_subdirectory() {
    let app = create_test_repo_code();

    let result = app.ls(Some("ver-stub")).await.expect("ls failed");

    // Should have src/ directory and Cargo.toml
    assert!(result.contains("src/"), "Should contain src/ directory");
    assert!(result.contains("Cargo.toml"), "Should contain Cargo.toml");
}

#[tokio::test]
async fn test_find_rust_files() {
    let app = create_test_repo_code();

    let result = app.find(Some("*.rs")).await.expect("find failed");

    // Should find Rust source files
    assert!(
        result.contains("ver-stub/src/lib.rs"),
        "Should find ver-stub/src/lib.rs"
    );
    assert!(
        result.contains("ver-stub-build/src/lib.rs"),
        "Should find ver-stub-build/src/lib.rs"
    );
}

#[tokio::test]
async fn test_find_with_path_pattern() {
    let app = create_test_repo_code();

    let result = app
        .find(Some("ver-stub-build/src/*.rs"))
        .await
        .expect("find failed");

    // Should find files in ver-stub-build/src/
    assert!(
        result.contains("ver-stub-build/src/lib.rs"),
        "Should find lib.rs"
    );
}

#[tokio::test]
async fn test_read_cargo_toml() {
    let app = create_test_repo_code();

    let result = app
        .read("Cargo.toml", None, None)
        .await
        .expect("read failed");

    // Verify content matches what we know is in the file
    assert!(result.contains("[workspace]"), "Should contain [workspace]");
    assert!(result.contains("ver-stub"), "Should contain ver-stub");
    assert!(
        result.contains("ver-stub-build"),
        "Should contain ver-stub-build"
    );
}

#[tokio::test]
async fn test_read_with_line_range() {
    let app = create_test_repo_code();

    // Read just the first 5 lines
    let result = app
        .read("Cargo.toml", Some(1), Some(5))
        .await
        .expect("read failed");

    // Should only have 5 lines
    let line_count = result.lines().count();
    assert_eq!(line_count, 5, "Should have exactly 5 lines");

    // First line should be [workspace]
    assert!(
        result.contains("[workspace]"),
        "First lines should contain [workspace]"
    );
}

#[tokio::test]
async fn test_read_nonexistent_file() {
    let app = create_test_repo_code();

    let result = app.read("nonexistent-file.txt", None, None).await;

    assert!(result.is_err(), "Should fail for nonexistent file");
    assert!(
        result.unwrap_err().contains("not found"),
        "Error should mention file not found"
    );
}

#[tokio::test]
async fn test_search_simple() {
    let app = create_test_repo_code();

    let result = app
        .search("workspace", 0, None)
        .await
        .expect("search failed");

    // Should find "workspace" in Cargo.toml
    assert!(
        result.contains("Cargo.toml"),
        "Should find match in Cargo.toml"
    );
}

#[tokio::test]
async fn test_search_with_context() {
    let app = create_test_repo_code();

    let result = app
        .search("resolver", 2, None)
        .await
        .expect("search failed");

    // Should have context lines around the match
    assert!(
        result.contains("Cargo.toml"),
        "Should find match in Cargo.toml"
    );
    // With context, should see surrounding lines
    assert!(
        result.contains("[workspace]"),
        "Should show context including [workspace]"
    );
}

#[tokio::test]
async fn test_search_with_path_prefix() {
    let app = create_test_repo_code();

    // Search only in ver-stub-build directory
    let result = app
        .search("pub", 0, Some("ver-stub-build/src"))
        .await
        .expect("search failed");

    // Should only find matches in ver-stub-build/src
    for line in result.lines() {
        if line.contains(":") && !line.starts_with('[') {
            // This is a match line (path:line: content)
            assert!(
                line.starts_with("ver-stub-build/src"),
                "All matches should be in ver-stub-build/src, got: {}",
                line
            );
        }
    }
}

#[tokio::test]
async fn test_search_no_matches() {
    let app = create_test_repo_code();

    let result = app
        .search("xyzzy_unlikely_string_12345", 0, None)
        .await
        .expect("search failed");

    assert!(result.contains("No matches"), "Should report no matches");
}

#[tokio::test]
async fn test_glob_filter_rust_files_only() {
    // Only include .rs files
    let app = create_test_repo_code_with_glob(vec!["**/*.rs".to_string()]);

    let result = app.find(Some("*")).await.expect("find failed");

    // Should find Rust files
    assert!(result.contains(".rs"), "Should contain .rs files");

    // Should NOT find non-Rust files
    assert!(
        !result.contains("Cargo.toml"),
        "Should not contain Cargo.toml"
    );
    assert!(
        !result.contains("README.md"),
        "Should not contain README.md"
    );
    assert!(!result.contains("tests.sh"), "Should not contain tests.sh");
}

#[tokio::test]
async fn test_glob_filter_specific_directory() {
    // Only include files in ver-stub/src
    let app = create_test_repo_code_with_glob(vec!["ver-stub/src/**".to_string()]);

    let result = app.find(Some("*")).await.expect("find failed");

    // Should find files in ver-stub/src
    assert!(
        result.contains("ver-stub/src/lib.rs"),
        "Should contain ver-stub/src/lib.rs"
    );

    // Should NOT find files outside ver-stub/src
    assert!(
        !result.contains("ver-stub-build/"),
        "Should not contain ver-stub-build files"
    );
    assert!(
        !result.contains("Cargo.toml"),
        "Should not contain root Cargo.toml"
    );
}

#[tokio::test]
async fn test_glob_filter_multiple_patterns() {
    // Include both Cargo.toml files and shell scripts
    let app =
        create_test_repo_code_with_glob(vec!["**/Cargo.toml".to_string(), "*.sh".to_string()]);

    let result = app.find(Some("*")).await.expect("find failed");

    // Should find Cargo.toml files
    assert!(result.contains("Cargo.toml"), "Should contain Cargo.toml");

    // Should find shell scripts
    assert!(result.contains("tests.sh"), "Should contain tests.sh");

    // Should NOT find other files
    assert!(
        !result.contains("README.md"),
        "Should not contain README.md"
    );
    assert!(!result.contains(".rs"), "Should not contain .rs files");
}

#[tokio::test]
async fn test_glob_filter_ls_shows_filtered_dirs() {
    // Only include files in ver-stub directory
    let app = create_test_repo_code_with_glob(vec!["ver-stub/**".to_string()]);

    let result = app.ls(None).await.expect("ls failed");

    // Root ls should only show ver-stub/ since other dirs are empty after filtering
    assert!(result.contains("ver-stub/"), "Should show ver-stub/");

    // Other directories should not appear (they have no matching files)
    assert!(
        !result.contains("ver-stub-build/"),
        "Should not show ver-stub-build/"
    );
}