#![cfg(not(target_os = "windows"))]
#![allow(clippy::unwrap_used, clippy::expect_used)]

use anyhow::Result;
use codex_core::model_family::find_family_for_model;
use codex_core::protocol::AskForApproval;
use codex_core::protocol::EventMsg;
use codex_core::protocol::InputItem;
use codex_core::protocol::Op;
use codex_core::protocol::SandboxPolicy;
use codex_protocol::config_types::ReasoningSummary;
use core_test_support::assert_regex_match;
use core_test_support::responses::ev_assistant_message;
use core_test_support::responses::ev_completed;
use core_test_support::responses::ev_custom_tool_call;
use core_test_support::responses::ev_function_call;
use core_test_support::responses::ev_response_created;
use core_test_support::responses::mount_sse_once;
use core_test_support::responses::mount_sse_sequence;
use core_test_support::responses::sse;
use core_test_support::responses::start_mock_server;
use core_test_support::skip_if_no_network;
use core_test_support::test_codex::TestCodex;
use core_test_support::test_codex::test_codex;
use core_test_support::wait_for_event;
use regex_lite::Regex;
use serde_json::Value;
use serde_json::json;

async fn submit_turn(
    test: &TestCodex,
    prompt: &str,
    approval_policy: AskForApproval,
    sandbox_policy: SandboxPolicy,
) -> Result<()> {
    let session_model = test.session_configured.model.clone();

    test.codex
        .submit(Op::UserTurn {
            items: vec![InputItem::Text {
                text: prompt.into(),
            }],
            final_output_json_schema: None,
            cwd: test.cwd.path().to_path_buf(),
            approval_policy,
            sandbox_policy,
            model: session_model,
            effort: None,
            summary: ReasoningSummary::Auto,
        })
        .await?;

    wait_for_event(&test.codex, |event| {
        matches!(event, EventMsg::TaskComplete(_))
    })
    .await;

    Ok(())
}

fn tool_names(body: &Value) -> Vec<String> {
    body.get("tools")
        .and_then(Value::as_array)
        .map(|tools| {
            tools
                .iter()
                .filter_map(|tool| {
                    tool.get("name")
                        .or_else(|| tool.get("type"))
                        .and_then(Value::as_str)
                        .map(str::to_string)
                })
                .collect()
        })
        .unwrap_or_default()
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn custom_tool_unknown_returns_custom_output_error() -> Result<()> {
    skip_if_no_network!(Ok(()));

    let server = start_mock_server().await;
    let mut builder = test_codex();
    let test = builder.build(&server).await?;

    let call_id = "custom-unsupported";
    let tool_name = "unsupported_tool";

    mount_sse_once(
        &server,
        sse(vec![
            ev_response_created("resp-1"),
            ev_custom_tool_call(call_id, tool_name, "\"payload\""),
            ev_completed("resp-1"),
        ]),
    )
    .await;
    let mock = mount_sse_once(
        &server,
        sse(vec![
            ev_assistant_message("msg-1", "done"),
            ev_completed("resp-2"),
        ]),
    )
    .await;

    submit_turn(
        &test,
        "invoke custom tool",
        AskForApproval::Never,
        SandboxPolicy::DangerFullAccess,
    )
    .await?;

    let item = mock.single_request().custom_tool_call_output(call_id);
    let output = item
        .get("output")
        .and_then(Value::as_str)
        .unwrap_or_default();
    let expected = format!("unsupported custom tool call: {tool_name}");
    assert_eq!(output, expected);

    Ok(())
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn shell_escalated_permissions_rejected_then_ok() -> Result<()> {
    skip_if_no_network!(Ok(()));

    let server = start_mock_server().await;
    let mut builder = test_codex().with_config(|config| {
        config.model = "gpt-5".to_string();
        config.model_family = find_family_for_model("gpt-5").expect("gpt-5 is a valid model");
    });
    let test = builder.build(&server).await?;

    let command = ["/bin/echo", "shell ok"];
    let call_id_blocked = "shell-blocked";
    let call_id_success = "shell-success";

    let first_args = json!({
        "command": command,
        "timeout_ms": 1_000,
        "with_escalated_permissions": true,
    });
    let second_args = json!({
        "command": command,
        "timeout_ms": 1_000,
    });

    mount_sse_once(
        &server,
        sse(vec![
            ev_response_created("resp-1"),
            ev_function_call(
                call_id_blocked,
                "shell",
                &serde_json::to_string(&first_args)?,
            ),
            ev_completed("resp-1"),
        ]),
    )
    .await;
    let second_mock = mount_sse_once(
        &server,
        sse(vec![
            ev_response_created("resp-2"),
            ev_function_call(
                call_id_success,
                "shell",
                &serde_json::to_string(&second_args)?,
            ),
            ev_completed("resp-2"),
        ]),
    )
    .await;
    let third_mock = mount_sse_once(
        &server,
        sse(vec![
            ev_assistant_message("msg-1", "done"),
            ev_completed("resp-3"),
        ]),
    )
    .await;

    submit_turn(
        &test,
        "run the shell command",
        AskForApproval::Never,
        SandboxPolicy::DangerFullAccess,
    )
    .await?;

    let policy = AskForApproval::Never;
    let expected_message = format!(
        "approval policy is {policy:?}; reject command — you should not ask for escalated permissions if the approval policy is {policy:?}"
    );

    let blocked_item = second_mock
        .single_request()
        .function_call_output(call_id_blocked);
    assert_eq!(
        blocked_item.get("output").and_then(Value::as_str),
        Some(expected_message.as_str()),
        "unexpected rejection message"
    );

    let success_item = third_mock
        .single_request()
        .function_call_output(call_id_success);
    let output_json: Value = serde_json::from_str(
        success_item
            .get("output")
            .and_then(Value::as_str)
            .expect("success output string"),
    )?;
    assert_eq!(
        output_json["metadata"]["exit_code"].as_i64(),
        Some(0),
        "expected exit code 0 after rerunning without escalation",
    );
    let stdout = output_json["output"].as_str().unwrap_or_default();
    let stdout_pattern = r"(?s)^shell ok\n?$";
    assert_regex_match(stdout_pattern, stdout);

    Ok(())
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn local_shell_missing_ids_maps_to_function_output_error() -> Result<()> {
    skip_if_no_network!(Ok(()));

    let server = start_mock_server().await;
    let mut builder = test_codex();
    let test = builder.build(&server).await?;

    let local_shell_event = json!({
        "type": "response.output_item.done",
        "item": {
            "type": "local_shell_call",
            "status": "completed",
            "action": {
                "type": "exec",
                "command": ["/bin/echo", "hi"],
            }
        }
    });

    mount_sse_once(
        &server,
        sse(vec![
            ev_response_created("resp-1"),
            local_shell_event,
            ev_completed("resp-1"),
        ]),
    )
    .await;
    let second_mock = mount_sse_once(
        &server,
        sse(vec![
            ev_assistant_message("msg-1", "done"),
            ev_completed("resp-2"),
        ]),
    )
    .await;

    submit_turn(
        &test,
        "check shell output",
        AskForApproval::Never,
        SandboxPolicy::DangerFullAccess,
    )
    .await?;

    let item = second_mock.single_request().function_call_output("");
    assert_eq!(item.get("call_id").and_then(Value::as_str), Some(""));
    assert_eq!(
        item.get("output").and_then(Value::as_str),
        Some("LocalShellCall without call_id or id"),
    );

    Ok(())
}

async fn collect_tools(use_unified_exec: bool) -> Result<Vec<String>> {
    let server = start_mock_server().await;

    let responses = vec![sse(vec![
        ev_response_created("resp-1"),
        ev_assistant_message("msg-1", "done"),
        ev_completed("resp-1"),
    ])];
    let mock = mount_sse_sequence(&server, responses).await;

    let mut builder = test_codex().with_config(move |config| {
        config.use_experimental_unified_exec_tool = use_unified_exec;
    });
    let test = builder.build(&server).await?;

    submit_turn(
        &test,
        "list tools",
        AskForApproval::Never,
        SandboxPolicy::DangerFullAccess,
    )
    .await?;

    let first_body = mock.single_request().body_json();
    Ok(tool_names(&first_body))
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn unified_exec_spec_toggle_end_to_end() -> Result<()> {
    skip_if_no_network!(Ok(()));

    let tools_disabled = collect_tools(false).await?;
    assert!(
        !tools_disabled.iter().any(|name| name == "unified_exec"),
        "tools list should not include unified_exec when disabled: {tools_disabled:?}"
    );

    let tools_enabled = collect_tools(true).await?;
    assert!(
        tools_enabled.iter().any(|name| name == "unified_exec"),
        "tools list should include unified_exec when enabled: {tools_enabled:?}"
    );

    Ok(())
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn shell_timeout_includes_timeout_prefix_and_metadata() -> Result<()> {
    skip_if_no_network!(Ok(()));

    let server = start_mock_server().await;
    let mut builder = test_codex().with_config(|config| {
        config.model = "gpt-5".to_string();
        config.model_family = find_family_for_model("gpt-5").expect("gpt-5 is a valid model");
    });
    let test = builder.build(&server).await?;

    let call_id = "shell-timeout";
    let timeout_ms = 50u64;
    let args = json!({
        "command": ["/bin/sh", "-c", "yes line | head -n 400; sleep 1"],
        "timeout_ms": timeout_ms,
    });

    mount_sse_once(
        &server,
        sse(vec![
            ev_response_created("resp-1"),
            ev_function_call(call_id, "shell", &serde_json::to_string(&args)?),
            ev_completed("resp-1"),
        ]),
    )
    .await;
    let second_mock = mount_sse_once(
        &server,
        sse(vec![
            ev_assistant_message("msg-1", "done"),
            ev_completed("resp-2"),
        ]),
    )
    .await;

    submit_turn(
        &test,
        "run a long command",
        AskForApproval::Never,
        SandboxPolicy::DangerFullAccess,
    )
    .await?;

    let timeout_item = second_mock.single_request().function_call_output(call_id);

    let output_str = timeout_item
        .get("output")
        .and_then(Value::as_str)
        .expect("timeout output string");

    // The exec path can report a timeout in two ways depending on timing:
    // 1) Structured JSON with exit_code 124 and a timeout prefix (preferred), or
    // 2) A plain error string if the child is observed as killed by a signal first.
    if let Ok(output_json) = serde_json::from_str::<Value>(output_str) {
        assert_eq!(
            output_json["metadata"]["exit_code"].as_i64(),
            Some(124),
            "expected timeout exit code 124",
        );

        let stdout = output_json["output"].as_str().unwrap_or_default();
        assert!(
            stdout.contains("command timed out"),
            "timeout output missing `command timed out`: {stdout}"
        );
    } else {
        // Fallback: accept the signal classification path to deflake the test.
        let signal_pattern = r"(?is)^execution error:.*signal.*$";
        assert_regex_match(signal_pattern, output_str);
    }

    Ok(())
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn shell_sandbox_denied_truncates_error_output() -> Result<()> {
    skip_if_no_network!(Ok(()));

    let server = start_mock_server().await;
    let mut builder = test_codex();
    let test = builder.build(&server).await?;

    let call_id = "shell-denied";
    let long_line = "this is a long stderr line that should trigger truncation 0123456789abcdefghijklmnopqrstuvwxyz";
    let script = format!(
        "for i in $(seq 1 500); do >&2 echo '{long_line}'; done; cat <<'EOF' > denied.txt\ncontent\nEOF",
    );
    let args = json!({
        "command": ["/bin/sh", "-c", script],
        "timeout_ms": 1_000,
    });

    mount_sse_once(
        &server,
        sse(vec![
            ev_response_created("resp-1"),
            ev_function_call(call_id, "shell", &serde_json::to_string(&args)?),
            ev_completed("resp-1"),
        ]),
    )
    .await;
    let second_mock = mount_sse_once(
        &server,
        sse(vec![
            ev_assistant_message("msg-1", "done"),
            ev_completed("resp-2"),
        ]),
    )
    .await;

    submit_turn(
        &test,
        "attempt to write in read-only sandbox",
        AskForApproval::Never,
        SandboxPolicy::ReadOnly,
    )
    .await?;

    let denied_item = second_mock.single_request().function_call_output(call_id);

    let output = denied_item
        .get("output")
        .and_then(Value::as_str)
        .expect("denied output string");

    let sandbox_pattern = r#"(?s)^Exit code: -?\d+
Wall time: [0-9]+(?:\.[0-9]+)? seconds
Total output lines: \d+
Output:

failed in sandbox: .*?(?:Operation not permitted|Permission denied|Read-only file system).*?
\[\.{3} omitted \d+ of \d+ lines \.{3}\]
.*this is a long stderr line that should trigger truncation 0123456789abcdefghijklmnopqrstuvwxyz.*
\n?$"#;
    let sandbox_regex = Regex::new(sandbox_pattern)?;
    if !sandbox_regex.is_match(output) {
        let fallback_pattern = r#"(?s)^Total output lines: \d+

failed in sandbox: this is a long stderr line that should trigger truncation 0123456789abcdefghijklmnopqrstuvwxyz
.*this is a long stderr line that should trigger truncation 0123456789abcdefghijklmnopqrstuvwxyz.*
.*(?:Operation not permitted|Permission denied|Read-only file system).*$"#;
        assert_regex_match(fallback_pattern, output);
    }

    Ok(())
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn shell_spawn_failure_truncates_exec_error() -> Result<()> {
    skip_if_no_network!(Ok(()));

    let server = start_mock_server().await;
    let mut builder = test_codex().with_config(|cfg| {
        cfg.sandbox_policy = SandboxPolicy::DangerFullAccess;
    });
    let test = builder.build(&server).await?;

    let call_id = "shell-spawn-failure";
    let bogus_component = "missing-bin-".repeat(700);
    let bogus_exe = test
        .cwd
        .path()
        .join(bogus_component)
        .to_string_lossy()
        .into_owned();

    let args = json!({
        "command": [bogus_exe],
        "timeout_ms": 1_000,
    });

    mount_sse_once(
        &server,
        sse(vec![
            ev_response_created("resp-1"),
            ev_function_call(call_id, "shell", &serde_json::to_string(&args)?),
            ev_completed("resp-1"),
        ]),
    )
    .await;
    let second_mock = mount_sse_once(
        &server,
        sse(vec![
            ev_assistant_message("msg-1", "done"),
            ev_completed("resp-2"),
        ]),
    )
    .await;

    submit_turn(
        &test,
        "spawn a missing binary",
        AskForApproval::Never,
        SandboxPolicy::DangerFullAccess,
    )
    .await?;

    let failure_item = second_mock.single_request().function_call_output(call_id);

    let output = failure_item
        .get("output")
        .and_then(Value::as_str)
        .expect("spawn failure output string");

    let spawn_error_pattern = r#"(?s)^Exit code: -?\d+
Wall time: [0-9]+(?:\.[0-9]+)? seconds
Output:
execution error: .*$"#;
    let spawn_truncated_pattern = r#"(?s)^Exit code: -?\d+
Wall time: [0-9]+(?:\.[0-9]+)? seconds
Total output lines: \d+
Output:

execution error: .*$"#;
    let spawn_error_regex = Regex::new(spawn_error_pattern)?;
    let spawn_truncated_regex = Regex::new(spawn_truncated_pattern)?;
    if !spawn_error_regex.is_match(output) && !spawn_truncated_regex.is_match(output) {
        let fallback_pattern = r"(?s)^execution error: .*$";
        assert_regex_match(fallback_pattern, output);
    }
    assert!(output.len() <= 10 * 1024);

    Ok(())
}