//! Org endpoints — deploy a baseline topology whose nodes are real *companies*,
//! then run it on the durable recursive runner. The top rung of the deploy
//! ladder (single → team → company → org). Creating an org composes companies
//! that already own their teams (which own their provisioned claws).

use axum::extract::{Path, State};
use axum::http::StatusCode;
use axum::Json;
use cm_topology::{build, TopologyKind};
use serde::{Deserialize, Serialize};
use serde_json::Value;
use time::format_description::well_known::Rfc3339;
use uuid::Uuid;

use crate::{ApiError, AppState, Authed};

/// One bound company in the org (becomes a topology node).
#[derive(Deserialize)]
pub struct OrgMemberInput {
    pub company_id: Uuid,
    #[serde(default)]
    pub role: String,
}

#[derive(Deserialize)]
pub struct CreateOrgRequest {
    pub name: String,
    /// TopologyKind (snake_case), e.g. "hierarchical", "pipeline".
    pub kind: String,
    pub members: Vec<OrgMemberInput>,
}

#[derive(Serialize)]
pub struct OrgCreated {
    pub org_id: String,
}

fn parse_kind(s: &str) -> Result<TopologyKind, ApiError> {
    serde_json::from_value(Value::String(s.to_string())).map_err(|_| ApiError::BadRequest)
}

/// `POST /api/orgs` — build the baseline topology over the chosen companies,
/// bind each node to its company, and persist. Validates ownership first.
pub async fn create_org(
    State(state): State<AppState>,
    Authed(user): Authed,
    Json(body): Json<CreateOrgRequest>,
) -> Result<(StatusCode, Json<OrgCreated>), ApiError> {
    if body.members.is_empty() {
        return Err(ApiError::BadRequest);
    }
    let kind = parse_kind(&body.kind)?;

    // 1. Validate each bound company is real + in this workspace.
    for m in &body.members {
        cm_db::repo::companies::get(&state.pool, m.company_id, user.workspace_id).await?;
    }

    // 2. Build the topology and bind each node to its company (attrs["company_id"]
    //    + attrs["agent"], so the orchestrator forwards it through TurnRequest).
    let roles: Vec<&str> = body
        .members
        .iter()
        .map(|m| {
            if m.role.is_empty() {
                "company"
            } else {
                m.role.as_str()
            }
        })
        .collect();
    let mut graph = build(kind, &roles).map_err(|_| ApiError::BadRequest)?;
    for (i, node) in graph.nodes.iter_mut().enumerate() {
        if let Some(m) = body.members.get(i) {
            node.attrs
                .insert("company_id".into(), m.company_id.to_string());
            node.attrs.insert("agent".into(), m.company_id.to_string());
        }
    }

    // 3. Persist org + node→company bindings.
    let org_id = Uuid::now_v7();
    let graph_json = serde_json::to_value(&graph).map_err(|_| ApiError::Internal)?;
    cm_db::repo::orgs::insert_org(
        &state.pool,
        org_id,
        user.workspace_id,
        &body.name,
        kind.as_str(),
        &graph_json,
    )
    .await?;
    for (i, node) in graph.nodes.iter().enumerate() {
        if let Some(m) = body.members.get(i) {
            cm_db::repo::orgs::add_company(&state.pool, org_id, &node.id, m.company_id, &node.role)
                .await?;
        }
    }

    Ok((
        StatusCode::CREATED,
        Json(OrgCreated {
            org_id: org_id.to_string(),
        }),
    ))
}

#[derive(Serialize)]
pub struct OrgSummaryOut {
    pub id: String,
    pub name: String,
    pub kind: String,
    pub status: String,
    pub created_at: String,
}

/// `GET /api/orgs` — recent orgs for the workspace.
pub async fn list_orgs(
    State(state): State<AppState>,
    Authed(user): Authed,
) -> Result<Json<Vec<OrgSummaryOut>>, ApiError> {
    let rows = cm_db::repo::orgs::list_for_workspace(&state.pool, user.workspace_id, 50).await?;
    Ok(Json(
        rows.into_iter()
            .map(|o| OrgSummaryOut {
                id: o.id.to_string(),
                name: o.name,
                kind: o.kind,
                status: o.status,
                created_at: o.created_at.format(&Rfc3339).unwrap_or_default(),
            })
            .collect(),
    ))
}

#[derive(Serialize)]
pub struct OrgCompanyOut {
    pub node_id: String,
    pub company_id: String,
    pub role: String,
}

#[derive(Serialize)]
pub struct OrgDetail {
    pub id: String,
    pub name: String,
    pub kind: String,
    pub status: String,
    pub created_at: String,
    pub graph: Value,
    pub members: Vec<OrgCompanyOut>,
}

/// `GET /api/orgs/{id}` — an org's graph + node→company bindings.
/// `DELETE /api/orgs/{id}` — remove the org (structural: companies survive, just
/// ungrouped from it).
pub async fn delete_org(
    State(state): State<AppState>,
    Authed(user): Authed,
    Path(id): Path<Uuid>,
) -> Result<axum::http::StatusCode, ApiError> {
    cm_db::repo::orgs::delete_org(&state.pool, id, user.workspace_id).await?;
    Ok(axum::http::StatusCode::NO_CONTENT)
}

pub async fn get_org(
    State(state): State<AppState>,
    Authed(user): Authed,
    Path(id): Path<Uuid>,
) -> Result<Json<OrgDetail>, ApiError> {
    let org = cm_db::repo::orgs::get(&state.pool, id, user.workspace_id).await?;
    let members = cm_db::repo::orgs::companies_for_org(&state.pool, id).await?;
    Ok(Json(OrgDetail {
        id: org.id.to_string(),
        name: org.name,
        kind: org.kind,
        status: org.status,
        created_at: org.created_at.format(&Rfc3339).unwrap_or_default(),
        graph: org.graph,
        members: members
            .into_iter()
            .map(|m| OrgCompanyOut {
                node_id: m.node_id,
                company_id: m.company_id.to_string(),
                role: m.role,
            })
            .collect(),
    }))
}

#[derive(Deserialize)]
pub struct RunOrgRequest {
    pub task: String,
}

#[derive(Serialize)]
pub struct RunAccepted {
    pub run_id: String,
    pub status: String,
}

/// `POST /api/orgs/{id}/run` — enqueue a durable `org`-tier run; the worker
/// drives the recursive executor (each node runs its company's topology, which
/// runs its teams, which run their claws).
pub async fn run_org(
    State(state): State<AppState>,
    Authed(user): Authed,
    Path(id): Path<Uuid>,
    Json(body): Json<RunOrgRequest>,
) -> Result<(StatusCode, Json<RunAccepted>), ApiError> {
    let org = cm_db::repo::orgs::get(&state.pool, id, user.workspace_id).await?;
    crate::quota::enforce_new_run(&state, user.workspace_id).await?;
    let run_id = Uuid::now_v7();
    cm_db::repo::topology_runs::enqueue_run_tier(
        &state.pool,
        run_id,
        user.workspace_id,
        &body.task,
        &org.graph,
        "org",
    )
    .await?;
    Ok((
        StatusCode::ACCEPTED,
        Json(RunAccepted {
            run_id: run_id.to_string(),
            status: "queued".into(),
        }),
    ))
}