routa_server/api/

tasks_automation.rs

use chrono::Utc;
use reqwest::header::{HeaderName, HeaderValue, ACCEPT, CONTENT_TYPE};
use routa_core::events::{AgentEvent, AgentEventType};
use routa_core::models::kanban::{KanbanAutomationStep, KanbanBoard, KanbanTransport};
use serde_json::{json, Value};
use std::collections::HashMap;
use std::time::{Duration, Instant};

use crate::error::ServerError;
use crate::models::task::{Task, TaskLaneSession, TaskLaneSessionStatus};
use crate::state::AppState;
use routa_core::store::acp_session_store::CreateAcpSessionParams;

const A2A_POLL_INTERVAL: Duration = Duration::from_secs(1);
const A2A_MAX_WAIT: Duration = Duration::from_secs(300);
const A2A_AUTH_CONFIGS_ENV: &str = "ROUTA_A2A_AUTH_CONFIGS";

pub async fn resolve_codebase(
    state: &AppState,
    workspace_id: &str,
    repo_path: Option<&str>,
) -> Result<Option<crate::models::codebase::Codebase>, ServerError> {
    if let Some(path) = repo_path {
        state
            .codebase_store
            .find_by_repo_path(workspace_id, path)
            .await
    } else {
        state.codebase_store.get_default(workspace_id).await
    }
}

pub async fn auto_create_worktree(
    state: &AppState,
    task: &crate::models::task::Task,
    codebase: &crate::models::codebase::Codebase,
) -> Result<String, String> {
    let slugified = task
        .title
        .to_lowercase()
        .chars()
        .map(|c| if c.is_alphanumeric() { c } else { '-' })
        .collect::<String>()
        .split('-')
        .filter(|s| !s.is_empty())
        .collect::<Vec<_>>()
        .join("-");
    let short_id = &task.id[..task.id.len().min(8)];
    let slug = format!("{}-{}", short_id, &slugified[..slugified.len().min(40)]);
    let branch = format!("issue/{}", slug);

    let workspace = state
        .workspace_store
        .get(&task.workspace_id)
        .await
        .ok()
        .flatten();
    let worktree_root = workspace
        .as_ref()
        .and_then(|ws| ws.metadata.get("worktreeRoot"))
        .filter(|s| !s.trim().is_empty())
        .map(std::path::PathBuf::from)
        .unwrap_or_else(|| crate::git::get_default_workspace_worktree_root(&task.workspace_id));

    let codebase_label = codebase
        .label
        .as_ref()
        .map(|l| crate::git::branch_to_safe_dir_name(l))
        .unwrap_or_else(|| crate::git::branch_to_safe_dir_name(&codebase.id));

    let worktree_path = worktree_root
        .join(&codebase_label)
        .join(crate::git::branch_to_safe_dir_name(&slug));

    if let Some(parent) = worktree_path.parent() {
        std::fs::create_dir_all(parent)
            .map_err(|e| format!("Failed to create worktree parent dir: {}", e))?;
    }

    let worktree_path_str = worktree_path.to_string_lossy().to_string();
    let base_branch = codebase
        .branch
        .clone()
        .unwrap_or_else(|| "main".to_string());

    let worktree = crate::models::worktree::Worktree::new(
        uuid::Uuid::new_v4().to_string(),
        codebase.id.clone(),
        task.workspace_id.clone(),
        worktree_path_str.clone(),
        branch.clone(),
        base_branch.clone(),
        Some(slug),
    );
    state
        .worktree_store
        .save(&worktree)
        .await
        .map_err(|e| format!("Failed to save worktree: {}", e))?;

    let _ = crate::git::worktree_prune(&codebase.repo_path);
    crate::git::worktree_add(
        &codebase.repo_path,
        &worktree_path_str,
        &branch,
        &base_branch,
        false,
    )
    .map_err(|e| format!("git worktree add failed: {}", e))?;

    Ok(worktree.id)
}

pub async fn trigger_assigned_task_agent(
    state: &AppState,
    task: &mut Task,
    cwd: Option<&str>,
    branch: Option<&str>,
) -> Result<(), String> {
    let board = load_task_board(state, task).await?;
    let step = resolve_task_automation_step(board.as_ref(), task);
    if is_a2a_step(step.as_ref()) {
        return trigger_assigned_task_a2a_agent(state, task, board.as_ref(), step.as_ref()).await;
    }

    trigger_assigned_task_acp_agent(state, task, board.as_ref(), step.as_ref(), cwd, branch).await
}

fn build_task_prompt(
    task: &Task,
    board_id: Option<&str>,
    next_column_id: Option<&str>,
    available_columns: &str,
) -> String {
    let labels = if task.labels.is_empty() {
        "Labels: none".to_string()
    } else {
        format!("Labels: {}", task.labels.join(", "))
    };
    let lane_id = task.column_id.as_deref().unwrap_or("backlog");
    let lane_guidance = match lane_id {
        "dev" => vec![
            "You are in the `dev` lane. This lane may implement the requested change, but you must keep work scoped to the current card.".to_string(),
            "Use `routa-coordination_update_card` to record concrete progress on this card before or after meaningful implementation steps.".to_string(),
            "When implementation for this lane is complete, use `routa-coordination_move_card` to advance the same card.".to_string(),
        ],
        "todo" => vec![
            "You are in the `todo` lane. This lane does not perform full implementation work.".to_string(),
            "Only clarify the card, update its progress or status, and move the same card forward when the lane is complete.".to_string(),
            "Do not edit files, do not inspect the whole repository, and do not run browser tests or environment diagnostics in this lane.".to_string(),
        ],
        _ => vec![
            format!("You are in the `{lane_id}` lane. Keep work scoped to the current card and this lane only."),
        ],
    };
    let mut sections = vec![
        format!("You are assigned to Kanban task: {}", task.title),
        String::new(),
        "## Context".to_string(),
        String::new(),
        "**IMPORTANT**: You are working in Kanban lane automation for exactly one existing card.".to_string(),
        "Only operate on the current card. Do not create a new task, do not switch to a different card, and do not broaden scope.".to_string(),
        "Use the exact MCP tool names exposed by the provider. In OpenCode, prefer `routa-coordination_update_card` and `routa-coordination_move_card`.".to_string(),
        "Do NOT use `gh issue create`, browser automation, Playwright, repo-wide debugging, API exploration, or unrelated codebase research unless the card objective explicitly requires it.".to_string(),
        String::new(),
        "## Task Details".to_string(),
        String::new(),
        format!("**Card ID:** {}", task.id),
        format!(
            "**Priority:** {}",
            task.priority.as_ref().map(|value| value.as_str()).unwrap_or("medium")
        ),
        board_id
            .map(|value| format!("**Board ID:** {}", value))
            .unwrap_or_else(|| "**Board ID:** unavailable".to_string()),
        format!("**Current Lane:** {}", lane_id),
        next_column_id
            .map(|value| format!("**Next Column ID:** {}", value))
            .unwrap_or_else(|| "**Next Column ID:** unavailable".to_string()),
        labels,
        task.github_url
            .as_ref()
            .map(|url| format!("**GitHub Issue:** {}", url))
            .unwrap_or_else(|| "**GitHub Issue:** local-only".to_string()),
        String::new(),
        "## Objective".to_string(),
        String::new(),
        task.objective.clone(),
        String::new(),
        "## Board Columns".to_string(),
        String::new(),
        available_columns.to_string(),
        String::new(),
        "## Lane Guidance".to_string(),
        String::new(),
        lane_guidance.join("\n"),
        String::new(),
    ];

    if let Some(test_cases) = task.test_cases.as_ref().filter(|value| !value.is_empty()) {
        sections.push("## Test Cases".to_string());
        sections.push(String::new());
        sections.push(
            test_cases
                .iter()
                .map(|value| format!("- {}", value))
                .collect::<Vec<_>>()
                .join("\n"),
        );
        sections.push(String::new());
    }

    sections.extend([
        "## Available MCP Tools".to_string(),
        String::new(),
        "Use the exact MCP tool names exposed in this session. For OpenCode, the important ones are:".to_string(),
        String::new(),
        format!(
            "- **routa-coordination_update_card**: Update this card's title, description, priority, or labels. Use cardId: \"{}\"",
            task.id
        ),
        format!(
            "- **routa-coordination_move_card**: Move this same card to targetColumnId \"{}\" when the current lane is complete.",
            next_column_id.unwrap_or("the exact next column id listed above")
        ),
        String::new(),
        "## Instructions".to_string(),
        String::new(),
        "1. Start work for the current lane immediately.".to_string(),
        "2. Keep changes focused on this card only.".to_string(),
        "3. Use the exact tool name `routa-coordination_update_card` to record progress on this card.".to_string(),
        format!(
            "4. Use the exact tool name `routa-coordination_move_card` with targetColumnId `{}` only when the current lane is complete.",
            next_column_id.unwrap_or("the exact next column id listed above")
        ),
        "5. Do not guess board ids or column ids. Use the Board ID and Board Columns listed above.".to_string(),
        "6. If blocked, update this same card with the blocking reason instead of exploring side quests.".to_string(),
        "7. Treat lane guidance as stricter than the general card objective when they conflict.".to_string(),
        "8. Do not run browser tests or environment diagnostics unless the card explicitly asks for them.".to_string(),
    ]);

    sections.join("\n")
}

async fn trigger_assigned_task_acp_agent(
    state: &AppState,
    task: &mut Task,
    board: Option<&KanbanBoard>,
    step: Option<&KanbanAutomationStep>,
    cwd: Option<&str>,
    branch: Option<&str>,
) -> Result<(), String> {
    let provider = task
        .assigned_provider
        .clone()
        .unwrap_or_else(|| "opencode".to_string());
    let role = task
        .assigned_role
        .clone()
        .unwrap_or_else(|| "CRAFTER".to_string())
        .to_uppercase();
    let session_id = uuid::Uuid::new_v4().to_string();
    let cwd = cwd
        .map(|value| value.to_string())
        .or_else(|| {
            std::env::current_dir()
                .ok()
                .map(|path| path.to_string_lossy().to_string())
        })
        .unwrap_or_else(|| ".".to_string());

    state
        .acp_manager
        .create_session(
            session_id.clone(),
            cwd.clone(),
            task.workspace_id.clone(),
            Some(provider.clone()),
            Some(role.clone()),
            None,
            None,
            Some("full".to_string()),
            Some("kanban-planning".to_string()),
        )
        .await
        .map_err(|error| format!("Failed to create ACP session: {}", error))?;

    state
        .acp_session_store
        .create(CreateAcpSessionParams {
            id: &session_id,
            cwd: &cwd,
            branch: None,
            workspace_id: &task.workspace_id,
            provider: Some(provider.as_str()),
            role: Some(role.as_str()),
            parent_session_id: None,
        })
        .await
        .map_err(|error| format!("Failed to persist ACP session: {}", error))?;

    let mut ordered_columns = board.map(|value| value.columns.clone()).unwrap_or_default();
    ordered_columns.sort_by_key(|column| column.position);
    let next_column_id = ordered_columns
        .iter()
        .position(|column| Some(column.id.as_str()) == task.column_id.as_deref())
        .and_then(|index| ordered_columns.get(index + 1))
        .map(|column| column.id.clone());
    let available_columns = if ordered_columns.is_empty() {
        "- unavailable".to_string()
    } else {
        ordered_columns
            .iter()
            .map(|column| {
                format!(
                    "- {} ({}) stage={} position={}",
                    column.id, column.name, column.stage, column.position
                )
            })
            .collect::<Vec<_>>()
            .join("\n")
    };
    let prompt = build_task_prompt(
        task,
        board
            .map(|value| value.id.as_str())
            .or(task.board_id.as_deref()),
        next_column_id.as_deref(),
        &available_columns,
    );
    let state_clone = state.clone();
    let session_id_clone = session_id.clone();
    let task_workspace = task.workspace_id.clone();
    let provider_clone = provider.clone();
    let cwd_clone = cwd.clone();
    let _branch = branch.map(|value| value.to_string());

    if let Err(error) = state
        .acp_session_store
        .set_first_prompt_sent(&session_id)
        .await
    {
        tracing::error!(
            target: "routa_kanban_prompt",
            session_id = %session_id,
            workspace_id = %task.workspace_id,
            error = %error,
            "kanban auto prompt failed to mark prompt dispatched"
        );
    } else {
        tracing::info!(
            target: "routa_kanban_prompt",
            session_id = %session_id,
            workspace_id = %task.workspace_id,
            provider = %provider,
            "kanban auto prompt marked prompt dispatched"
        );
    }

    tracing::info!(
        target: "routa_kanban_prompt",
        session_id = %session_id_clone,
        workspace_id = %task_workspace,
        provider = %provider_clone,
        cwd = %cwd_clone,
        "kanban auto prompt scheduled"
    );

    tokio::spawn(async move {
        tracing::info!(
            target: "routa_kanban_prompt",
            session_id = %session_id_clone,
            workspace_id = %task_workspace,
            provider = %provider_clone,
            cwd = %cwd_clone,
            "kanban auto prompt start"
        );
        if let Err(error) = state_clone
            .acp_manager
            .prompt(&session_id_clone, &prompt)
            .await
        {
            tracing::error!(
                "[kanban] Failed to auto-prompt ACP task session {} in workspace {} with provider {} at {}: {}",
                session_id_clone,
                task_workspace,
                provider_clone,
                cwd_clone,
                error
            );
            return;
        }

        tracing::info!(
            target: "routa_kanban_prompt",
            session_id = %session_id_clone,
            workspace_id = %task_workspace,
            provider = %provider_clone,
            "kanban auto prompt success"
        );
        if let Some(history) = state_clone
            .acp_manager
            .get_session_history(&session_id_clone)
            .await
        {
            if let Err(error) = state_clone
                .acp_session_store
                .save_history(&session_id_clone, &history)
                .await
            {
                tracing::error!(
                    target: "routa_kanban_prompt",
                    session_id = %session_id_clone,
                    workspace_id = %task_workspace,
                    error = %error,
                    "kanban auto prompt failed to persist history"
                );
            } else {
                tracing::info!(
                    target: "routa_kanban_prompt",
                    session_id = %session_id_clone,
                    workspace_id = %task_workspace,
                    history_len = history.len(),
                    "kanban auto prompt persisted history"
                );
            }
        }
    });

    apply_trigger_result(
        task,
        board,
        step,
        AgentTriggerResult {
            session_id,
            transport: "acp".to_string(),
            external_task_id: None,
            context_id: None,
        },
    );

    Ok(())
}

async fn trigger_assigned_task_a2a_agent(
    state: &AppState,
    task: &mut Task,
    board: Option<&KanbanBoard>,
    step: Option<&KanbanAutomationStep>,
) -> Result<(), String> {
    let step = step.ok_or_else(|| "A2A automation requires a resolved column step".to_string())?;
    let agent_card_url = step
        .agent_card_url
        .as_deref()
        .ok_or_else(|| "A2A automation requires agentCardUrl".to_string())?;
    let auth_headers = resolve_a2a_auth_headers(step.auth_config_id.as_deref())?;

    let mut ordered_columns = board.map(|value| value.columns.clone()).unwrap_or_default();
    ordered_columns.sort_by_key(|column| column.position);
    let next_column_id = ordered_columns
        .iter()
        .position(|column| Some(column.id.as_str()) == task.column_id.as_deref())
        .and_then(|index| ordered_columns.get(index + 1))
        .map(|column| column.id.clone());
    let available_columns = if ordered_columns.is_empty() {
        "- unavailable".to_string()
    } else {
        ordered_columns
            .iter()
            .map(|column| {
                format!(
                    "- {} ({}) stage={} position={}",
                    column.id, column.name, column.stage, column.position
                )
            })
            .collect::<Vec<_>>()
            .join("\n")
    };
    let prompt = build_task_prompt(
        task,
        board
            .map(|value| value.id.as_str())
            .or(task.board_id.as_deref()),
        next_column_id.as_deref(),
        &available_columns,
    );

    let client = reqwest::Client::new();
    let rpc_endpoint =
        resolve_a2a_rpc_endpoint(&client, agent_card_url, auth_headers.as_ref()).await?;
    let request_id = uuid::Uuid::new_v4().to_string();
    let message_id = uuid::Uuid::new_v4().to_string();
    let response = apply_a2a_auth_headers(
        client
            .post(&rpc_endpoint)
            .header(CONTENT_TYPE, "application/json")
            .header(ACCEPT, "application/json")
            .json(&json!({
                "jsonrpc": "2.0",
                "id": request_id,
                "method": "SendMessage",
                "params": {
                    "message": {
                        "messageId": message_id,
                        "role": "user",
                        "parts": [
                            { "text": prompt }
                        ]
                    },
                    "metadata": {
                        "workspaceId": task.workspace_id,
                        "taskId": task.id,
                        "boardId": task.board_id,
                        "columnId": task.column_id,
                        "stepId": step.id,
                        "skillId": step.skill_id,
                        "authConfigId": step.auth_config_id,
                        "role": task.assigned_role,
                    }
                }
            })),
        auth_headers.as_ref(),
    )?
    .send()
    .await
    .map_err(|error| format!("Failed to send A2A request: {}", error))?;

    if !response.status().is_success() {
        return Err(format!(
            "A2A request failed with HTTP {}",
            response.status().as_u16()
        ));
    }

    let payload: Value = response
        .json()
        .await
        .map_err(|error| format!("Failed to decode A2A response: {}", error))?;
    if let Some(error) = payload.get("error") {
        let message = error
            .get("message")
            .and_then(Value::as_str)
            .unwrap_or("unknown A2A error");
        return Err(format!("A2A JSON-RPC error: {}", message));
    }

    let task_result = payload
        .get("result")
        .and_then(|value| value.get("task"))
        .ok_or_else(|| "A2A response missing result.task".to_string())?;
    let external_task_id = task_result
        .get("id")
        .and_then(Value::as_str)
        .ok_or_else(|| "A2A response missing task.id".to_string())?
        .to_string();
    let context_id = task_result
        .get("contextId")
        .and_then(Value::as_str)
        .map(ToOwned::to_owned);
    let session_id = format!("a2a-{}", uuid::Uuid::new_v4());

    apply_trigger_result(
        task,
        board,
        Some(step),
        AgentTriggerResult {
            session_id: session_id.clone(),
            transport: "a2a".to_string(),
            external_task_id: Some(external_task_id.clone()),
            context_id,
        },
    );

    let state_clone = state.clone();
    let task_id = task.id.clone();
    let workspace_id = task.workspace_id.clone();
    tokio::spawn(async move {
        monitor_a2a_task_completion(
            &state_clone,
            &workspace_id,
            &task_id,
            &session_id,
            &rpc_endpoint,
            &external_task_id,
            auth_headers,
        )
        .await;
    });

    Ok(())
}

#[derive(Debug)]
struct AgentTriggerResult {
    session_id: String,
    transport: String,
    external_task_id: Option<String>,
    context_id: Option<String>,
}

fn apply_trigger_result(
    task: &mut Task,
    board: Option<&KanbanBoard>,
    step: Option<&KanbanAutomationStep>,
    result: AgentTriggerResult,
) {
    task.trigger_session_id = Some(result.session_id.clone());
    if !task.session_ids.iter().any(|id| id == &result.session_id) {
        task.session_ids.push(result.session_id.clone());
    }

    let column_name = board.and_then(|value| {
        value.columns.iter().find_map(|column| {
            (Some(column.id.as_str()) == task.column_id.as_deref()).then(|| column.name.clone())
        })
    });
    let lane_session = TaskLaneSession {
        session_id: result.session_id.clone(),
        routa_agent_id: None,
        column_id: task.column_id.clone(),
        column_name,
        step_id: step.map(|value| value.id.clone()),
        step_index: None,
        step_name: step
            .and_then(|value| value.specialist_name.clone())
            .or_else(|| task.assigned_specialist_name.clone()),
        provider: task.assigned_provider.clone(),
        role: task.assigned_role.clone(),
        specialist_id: task.assigned_specialist_id.clone(),
        specialist_name: task.assigned_specialist_name.clone(),
        transport: Some(result.transport),
        external_task_id: result.external_task_id,
        context_id: result.context_id,
        attempt: Some(1),
        loop_mode: None,
        completion_requirement: None,
        objective: Some(task.objective.clone()),
        last_activity_at: Some(Utc::now().to_rfc3339()),
        recovered_from_session_id: None,
        recovery_reason: None,
        status: TaskLaneSessionStatus::Running,
        started_at: Utc::now().to_rfc3339(),
        completed_at: None,
    };

    if let Some(existing) = task
        .lane_sessions
        .iter_mut()
        .find(|existing| existing.session_id == result.session_id)
    {
        *existing = lane_session;
    } else {
        task.lane_sessions.push(lane_session);
    }
}

#[derive(Debug)]
struct A2ATaskTerminalUpdate {
    status: TaskLaneSessionStatus,
    completed_at: String,
    last_activity_at: String,
    context_id: Option<String>,
    error: Option<String>,
}

async fn monitor_a2a_task_completion(
    state: &AppState,
    workspace_id: &str,
    task_id: &str,
    session_id: &str,
    rpc_endpoint: &str,
    external_task_id: &str,
    auth_headers: Option<HashMap<String, String>>,
) {
    let client = reqwest::Client::new();
    let terminal = match wait_for_a2a_completion(
        &client,
        rpc_endpoint,
        external_task_id,
        auth_headers.as_ref(),
    )
    .await
    {
        Ok(terminal) => terminal,
        Err(error) => {
            let now = Utc::now().to_rfc3339();
            let status = if error.contains("did not complete within") {
                TaskLaneSessionStatus::TimedOut
            } else {
                TaskLaneSessionStatus::Failed
            };
            A2ATaskTerminalUpdate {
                status,
                completed_at: now.clone(),
                last_activity_at: now,
                context_id: None,
                error: Some(error),
            }
        }
    };

    if let Err(error) =
        reconcile_a2a_lane_session(state, task_id, session_id, external_task_id, terminal).await
    {
        tracing::warn!(
            target: "routa_a2a",
            workspace_id = %workspace_id,
            task_id = %task_id,
            session_id = %session_id,
            external_task_id = %external_task_id,
            error = %error,
            "failed to persist A2A terminal state"
        );
        return;
    }

    emit_kanban_workspace_event(state, workspace_id, task_id).await;
}

async fn wait_for_a2a_completion(
    client: &reqwest::Client,
    rpc_endpoint: &str,
    task_id: &str,
    auth_headers: Option<&HashMap<String, String>>,
) -> Result<A2ATaskTerminalUpdate, String> {
    let started_at = Instant::now();

    loop {
        let terminal = get_a2a_task_update(client, rpc_endpoint, task_id, auth_headers).await?;
        if let Some(terminal) = terminal {
            return Ok(terminal);
        }
        if started_at.elapsed() >= A2A_MAX_WAIT {
            return Err(format!(
                "A2A task {task_id} did not complete within {}ms",
                A2A_MAX_WAIT.as_millis()
            ));
        }
        tokio::time::sleep(A2A_POLL_INTERVAL).await;
    }
}

async fn get_a2a_task_update(
    client: &reqwest::Client,
    rpc_endpoint: &str,
    task_id: &str,
    auth_headers: Option<&HashMap<String, String>>,
) -> Result<Option<A2ATaskTerminalUpdate>, String> {
    let request_id = uuid::Uuid::new_v4().to_string();
    let response = apply_a2a_auth_headers(
        client
            .post(rpc_endpoint)
            .header(CONTENT_TYPE, "application/json")
            .header(ACCEPT, "application/json")
            .json(&json!({
                "jsonrpc": "2.0",
                "id": request_id,
                "method": "GetTask",
                "params": { "id": task_id }
            })),
        auth_headers,
    )?
    .send()
    .await
    .map_err(|error| format!("Failed to poll A2A task: {}", error))?;

    if !response.status().is_success() {
        return Err(format!(
            "A2A GetTask failed with HTTP {}",
            response.status().as_u16()
        ));
    }

    let payload: Value = response
        .json()
        .await
        .map_err(|error| format!("Failed to decode A2A task payload: {}", error))?;
    if let Some(error) = payload.get("error") {
        let message = error
            .get("message")
            .and_then(Value::as_str)
            .unwrap_or("unknown A2A error");
        return Err(format!("A2A JSON-RPC error: {}", message));
    }

    let task = payload
        .get("result")
        .and_then(|value| value.get("task"))
        .ok_or_else(|| "A2A response missing result.task".to_string())?;
    let state = task
        .get("status")
        .and_then(|value| value.get("state"))
        .and_then(Value::as_str)
        .ok_or_else(|| "A2A task missing status.state".to_string())?;
    if !is_terminal_a2a_state(state) {
        return Ok(None);
    }

    let timestamp = task
        .get("status")
        .and_then(|value| value.get("timestamp"))
        .and_then(Value::as_str)
        .map(ToOwned::to_owned)
        .unwrap_or_else(|| Utc::now().to_rfc3339());
    let context_id = task
        .get("contextId")
        .and_then(Value::as_str)
        .map(ToOwned::to_owned);
    let error = if state == "completed" {
        None
    } else {
        Some(
            extract_a2a_status_message(task)
                .unwrap_or_else(|| format!("A2A task ended in state: {state}")),
        )
    };

    Ok(Some(A2ATaskTerminalUpdate {
        status: map_a2a_terminal_status(state),
        completed_at: timestamp.clone(),
        last_activity_at: timestamp,
        context_id,
        error,
    }))
}

fn extract_a2a_status_message(task: &Value) -> Option<String> {
    let parts = task
        .get("status")
        .and_then(|value| value.get("message"))
        .and_then(|value| value.get("parts"))
        .and_then(Value::as_array)?;
    let text = parts
        .iter()
        .filter_map(|part| part.get("text").and_then(Value::as_str))
        .map(str::trim)
        .filter(|part| !part.is_empty())
        .collect::<Vec<_>>()
        .join(" ");
    (!text.is_empty()).then_some(text)
}

fn is_terminal_a2a_state(state: &str) -> bool {
    matches!(
        state,
        "completed" | "failed" | "canceled" | "rejected" | "auth-required"
    )
}

fn map_a2a_terminal_status(state: &str) -> TaskLaneSessionStatus {
    match state {
        "completed" => TaskLaneSessionStatus::Completed,
        _ => TaskLaneSessionStatus::Failed,
    }
}

async fn reconcile_a2a_lane_session(
    state: &AppState,
    task_id: &str,
    session_id: &str,
    external_task_id: &str,
    terminal: A2ATaskTerminalUpdate,
) -> Result<(), String> {
    let mut task = wait_for_task_persistence(state, task_id, session_id).await?;
    let lane_session = task
        .lane_sessions
        .iter_mut()
        .find(|session| session.session_id == session_id)
        .ok_or_else(|| format!("Task {task_id} missing lane session {session_id}"))?;

    lane_session.status = terminal.status;
    lane_session.completed_at = Some(terminal.completed_at.clone());
    lane_session.last_activity_at = Some(terminal.last_activity_at.clone());
    if lane_session.external_task_id.is_none() {
        lane_session.external_task_id = Some(external_task_id.to_string());
    }
    if terminal.context_id.is_some() {
        lane_session.context_id = terminal.context_id.clone();
    }

    if task.trigger_session_id.as_deref() == Some(session_id) {
        task.trigger_session_id = None;
    }
    task.last_sync_error = terminal.error;
    task.updated_at = Utc::now();

    state
        .task_store
        .save(&task)
        .await
        .map_err(|error| format!("Failed to save A2A task reconciliation: {}", error))
}

async fn wait_for_task_persistence(
    state: &AppState,
    task_id: &str,
    session_id: &str,
) -> Result<Task, String> {
    for _ in 0..20 {
        if let Some(task) = state
            .task_store
            .get(task_id)
            .await
            .map_err(|error| format!("Failed to load task {task_id}: {}", error))?
        {
            if task
                .lane_sessions
                .iter()
                .any(|session| session.session_id == session_id)
            {
                return Ok(task);
            }
        }
        tokio::time::sleep(Duration::from_millis(50)).await;
    }

    Err(format!(
        "Task {task_id} did not persist lane session {session_id} before A2A reconciliation"
    ))
}

async fn emit_kanban_workspace_event(state: &AppState, workspace_id: &str, task_id: &str) {
    state
        .event_bus
        .emit(AgentEvent {
            event_type: AgentEventType::WorkspaceUpdated,
            agent_id: "kanban-a2a".to_string(),
            workspace_id: workspace_id.to_string(),
            data: serde_json::json!({
                "scope": "kanban",
                "entity": "task",
                "action": "updated",
                "resourceId": task_id,
                "source": "system",
            }),
            timestamp: Utc::now(),
        })
        .await;
}

async fn load_task_board(state: &AppState, task: &Task) -> Result<Option<KanbanBoard>, String> {
    if let Some(board_id) = task.board_id.as_deref() {
        state
            .kanban_store
            .get(board_id)
            .await
            .map_err(|error| format!("Failed to load Kanban board for automation: {}", error))
    } else {
        Ok(None)
    }
}

fn resolve_task_automation_step(
    board: Option<&KanbanBoard>,
    task: &Task,
) -> Option<KanbanAutomationStep> {
    board
        .and_then(|value| {
            value
                .columns
                .iter()
                .find(|column| Some(column.id.as_str()) == task.column_id.as_deref())
        })
        .and_then(|column| column.automation.as_ref())
        .filter(|automation| automation.enabled)
        .and_then(|automation| automation.primary_step())
}

fn is_a2a_step(step: Option<&KanbanAutomationStep>) -> bool {
    step.is_some_and(|value| {
        matches!(value.transport, Some(KanbanTransport::A2a)) || value.agent_card_url.is_some()
    })
}

fn resolve_a2a_auth_headers(
    auth_config_id: Option<&str>,
) -> Result<Option<HashMap<String, String>>, String> {
    let Some(auth_config_id) = auth_config_id
        .map(str::trim)
        .filter(|value| !value.is_empty())
    else {
        return Ok(None);
    };
    let raw = std::env::var(A2A_AUTH_CONFIGS_ENV).unwrap_or_default();
    if raw.trim().is_empty() {
        return Err(format!(
            "A2A auth config \"{}\" was not found in {}.",
            auth_config_id, A2A_AUTH_CONFIGS_ENV
        ));
    }

    let parsed: Value = serde_json::from_str(&raw)
        .map_err(|error| format!("Invalid {} JSON: {}", A2A_AUTH_CONFIGS_ENV, error))?;
    let config = parsed.get(auth_config_id).ok_or_else(|| {
        format!(
            "A2A auth config \"{}\" was not found in {}.",
            auth_config_id, A2A_AUTH_CONFIGS_ENV
        )
    })?;
    let headers = config.get("headers").unwrap_or(config);
    let headers_obj = headers.as_object().ok_or_else(|| {
        format!(
            "{}.{} must be a header map or contain a string header map in \"headers\".",
            A2A_AUTH_CONFIGS_ENV, auth_config_id
        )
    })?;

    let mut resolved = HashMap::new();
    for (name, value) in headers_obj {
        let value = value.as_str().ok_or_else(|| {
            format!(
                "{}.{} header {} must be a string.",
                A2A_AUTH_CONFIGS_ENV, auth_config_id, name
            )
        })?;
        resolved.insert(name.clone(), value.to_string());
    }

    Ok(Some(resolved))
}

fn apply_a2a_auth_headers(
    mut request: reqwest::RequestBuilder,
    auth_headers: Option<&HashMap<String, String>>,
) -> Result<reqwest::RequestBuilder, String> {
    if let Some(auth_headers) = auth_headers {
        for (name, value) in auth_headers {
            let header_name = HeaderName::try_from(name.as_str())
                .map_err(|error| format!("Invalid A2A auth header name {}: {}", name, error))?;
            let header_value = HeaderValue::from_str(value).map_err(|error| {
                format!(
                    "Invalid A2A auth header value for {}: {}",
                    header_name.as_str(),
                    error
                )
            })?;
            request = request.header(header_name, header_value);
        }
    }

    Ok(request)
}

async fn resolve_a2a_rpc_endpoint(
    client: &reqwest::Client,
    url: &str,
    auth_headers: Option<&HashMap<String, String>>,
) -> Result<String, String> {
    if url.ends_with(".json") || url.ends_with("/agent-card") || url.ends_with("/card") {
        let response = apply_a2a_auth_headers(
            client.get(url).header(ACCEPT, "application/json"),
            auth_headers,
        )?
        .send()
        .await
        .map_err(|error| format!("Failed to fetch A2A agent card: {}", error))?;
        if !response.status().is_success() {
            return Err(format!(
                "A2A agent card fetch failed with HTTP {}",
                response.status().as_u16()
            ));
        }
        let card: Value = response
            .json()
            .await
            .map_err(|error| format!("Failed to decode A2A agent card: {}", error))?;
        let rpc_url = card
            .get("url")
            .and_then(Value::as_str)
            .ok_or_else(|| "A2A agent card missing url".to_string())?;
        absolutize_url(url, rpc_url)
    } else {
        Ok(url.to_string())
    }
}

fn absolutize_url(base_url: &str, maybe_relative: &str) -> Result<String, String> {
    if maybe_relative.starts_with("http://") || maybe_relative.starts_with("https://") {
        return Ok(maybe_relative.to_string());
    }

    let base = reqwest::Url::parse(base_url)
        .map_err(|error| format!("Invalid base A2A URL {}: {}", base_url, error))?;
    base.join(maybe_relative)
        .map(|url| url.to_string())
        .map_err(|error| format!("Invalid relative A2A URL {}: {}", maybe_relative, error))
}