use std::collections::HashMap;
use std::path::Path;

use codex_core::protocol::AskForApproval;
use codex_protocol::config_types::ReasoningEffort;
use codex_protocol::config_types::ReasoningSummary;
use codex_protocol::config_types::SandboxMode;
use codex_protocol::config_types::Verbosity;
use codex_protocol::mcp_protocol::GetUserSavedConfigResponse;
use codex_protocol::mcp_protocol::Profile;
use codex_protocol::mcp_protocol::SandboxSettings;
use codex_protocol::mcp_protocol::Tools;
use codex_protocol::mcp_protocol::UserSavedConfig;
use mcp_test_support::McpProcess;
use mcp_test_support::to_response;
use mcp_types::JSONRPCResponse;
use mcp_types::RequestId;
use pretty_assertions::assert_eq;
use tempfile::TempDir;
use tokio::time::timeout;

const DEFAULT_READ_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(10);

fn create_config_toml(codex_home: &Path) -> std::io::Result<()> {
    let config_toml = codex_home.join("config.toml");
    std::fs::write(
        config_toml,
        r#"
model = "gpt-5"
approval_policy = "on-request"
sandbox_mode = "workspace-write"
model_reasoning_summary = "detailed"
model_reasoning_effort = "high"
model_verbosity = "medium"
profile = "test"

[sandbox_workspace_write]
writable_roots = ["/tmp"]
network_access = true
exclude_tmpdir_env_var = true
exclude_slash_tmp = true

[tools]
web_search = false
view_image = true

[profiles.test]
model = "gpt-4o"
approval_policy = "on-request"
model_reasoning_effort = "high"
model_reasoning_summary = "detailed"
model_verbosity = "medium"
model_provider = "openai"
chatgpt_base_url = "https://api.chatgpt.com"
"#,
    )
}

#[tokio::test(flavor = "multi_thread", worker_threads = 4)]
async fn get_config_toml_parses_all_fields() {
    let codex_home = TempDir::new().unwrap_or_else(|e| panic!("create tempdir: {e}"));
    create_config_toml(codex_home.path()).expect("write config.toml");

    let mut mcp = McpProcess::new(codex_home.path())
        .await
        .expect("spawn mcp process");
    timeout(DEFAULT_READ_TIMEOUT, mcp.initialize())
        .await
        .expect("init timeout")
        .expect("init failed");

    let request_id = mcp
        .send_get_user_saved_config_request()
        .await
        .expect("send getUserSavedConfig");
    let resp: JSONRPCResponse = timeout(
        DEFAULT_READ_TIMEOUT,
        mcp.read_stream_until_response_message(RequestId::Integer(request_id)),
    )
    .await
    .expect("getUserSavedConfig timeout")
    .expect("getUserSavedConfig response");

    let config: GetUserSavedConfigResponse = to_response(resp).expect("deserialize config");
    let expected = GetUserSavedConfigResponse {
        config: UserSavedConfig {
            approval_policy: Some(AskForApproval::OnRequest),
            sandbox_mode: Some(SandboxMode::WorkspaceWrite),
            sandbox_settings: Some(SandboxSettings {
                writable_roots: vec!["/tmp".into()],
                network_access: Some(true),
                exclude_tmpdir_env_var: Some(true),
                exclude_slash_tmp: Some(true),
            }),
            model: Some("gpt-5".into()),
            model_reasoning_effort: Some(ReasoningEffort::High),
            model_reasoning_summary: Some(ReasoningSummary::Detailed),
            model_verbosity: Some(Verbosity::Medium),
            tools: Some(Tools {
                web_search: Some(false),
                view_image: Some(true),
            }),
            profile: Some("test".to_string()),
            profiles: HashMap::from([(
                "test".into(),
                Profile {
                    model: Some("gpt-4o".into()),
                    approval_policy: Some(AskForApproval::OnRequest),
                    model_reasoning_effort: Some(ReasoningEffort::High),
                    model_reasoning_summary: Some(ReasoningSummary::Detailed),
                    model_verbosity: Some(Verbosity::Medium),
                    model_provider: Some("openai".into()),
                    chatgpt_base_url: Some("https://api.chatgpt.com".into()),
                },
            )]),
        },
    };

    assert_eq!(config, expected);
}

#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn get_config_toml_empty() {
    let codex_home = TempDir::new().unwrap_or_else(|e| panic!("create tempdir: {e}"));

    let mut mcp = McpProcess::new(codex_home.path())
        .await
        .expect("spawn mcp process");
    timeout(DEFAULT_READ_TIMEOUT, mcp.initialize())
        .await
        .expect("init timeout")
        .expect("init failed");

    let request_id = mcp
        .send_get_user_saved_config_request()
        .await
        .expect("send getUserSavedConfig");
    let resp: JSONRPCResponse = timeout(
        DEFAULT_READ_TIMEOUT,
        mcp.read_stream_until_response_message(RequestId::Integer(request_id)),
    )
    .await
    .expect("getUserSavedConfig timeout")
    .expect("getUserSavedConfig response");

    let config: GetUserSavedConfigResponse = to_response(resp).expect("deserialize config");
    let expected = GetUserSavedConfigResponse {
        config: UserSavedConfig {
            approval_policy: None,
            sandbox_mode: None,
            sandbox_settings: None,
            model: None,
            model_reasoning_effort: None,
            model_reasoning_summary: None,
            model_verbosity: None,
            tools: None,
            profile: None,
            profiles: HashMap::new(),
        },
    };

    assert_eq!(config, expected);
}