import { z } from "zod";
import { canControlAgent } from "../agent-permissions";
import type { AgentApiServer } from "./server-core";

export function registerAgentControlRoutes(server: AgentApiServer) {
  const db = server.db_;
  const onDomainChanged = server.onDomainChanged_;
  const onWakeAgent = server.onWakeAgent_;

  server.addRoute("POST", "/api/agents/:agentId/wake", (_req, res, params, token, body) => {
    const targetAgentId = params.agentId!;
    const targetAgent = (() => {
      try {
        return db.getAgent(targetAgentId);
      } catch {
        return null;
      }
    })();
    if (!targetAgent || targetAgent.companyId !== token.companyId) {
      server.json(res, 404, { error: "Agent not found" });
      return;
    }
    if (!canControlAgent(db, token.companyId, token.agentId, targetAgentId)) {
      server.json(res, 403, { error: "Current agent is not allowed to wake this agent" });
      return;
    }
    const wakeSchema = z.object({
      reason: z.string().min(1).max(200).default("peer_request"),
    });
    const parsed = wakeSchema.safeParse(body);
    const reason = parsed.success ? parsed.data.reason : "peer_request";
    const alreadyActive = db.hasActiveRun({ companyId: token.companyId, agentId: targetAgentId });
    const runId = onWakeAgent(targetAgentId, token.companyId, reason);
    if (runId) {
      server.json(res, 200, { ok: true, runId, message: `Wake started for agent ${targetAgentId}` });
      return;
    }
    if (alreadyActive) {
      server.json(res, 202, {
        ok: true,
        queued: true,
        message: `Agent ${targetAgentId} is already running. Wake will be retried after the active run completes.`,
      });
      return;
    }
    server.json(res, 409, { ok: false, error: "Agent could not be woken right now" });
  });

  server.addRoute("PATCH", "/api/agents/:agentId/heartbeat", (_req, res, params, token) => {
    const targetAgentId = params.agentId!;
    const snapshot = db.listSnapshot();
    const targetAgent = snapshot.agents.find(
      (a) => a.id === targetAgentId && a.companyId === token.companyId,
    );
    if (!targetAgent) {
      server.json(res, 404, { error: "Agent not found or not in the same company" });
      return;
    }
    if (!canControlAgent(db, token.companyId, token.agentId, targetAgentId)) {
      server.json(res, 403, { error: "Current agent is not allowed to trigger heartbeat for this agent" });
      return;
    }
    const alreadyActive = db.hasActiveRun({ companyId: token.companyId, agentId: targetAgentId });
    const runId = onWakeAgent(targetAgentId, token.companyId, "peer_request");
    if (runId) {
      server.json(res, 200, { ok: true, runId, message: `Heartbeat triggered for agent ${targetAgentId}` });
      return;
    }
    if (alreadyActive) {
      server.json(res, 202, {
        ok: true,
        queued: true,
        message: `Agent ${targetAgentId} is already running. Heartbeat will retry after the current run.`,
      });
      return;
    }
    server.json(res, 409, { ok: false, error: "Heartbeat could not be started for this agent" });
  });

  server.addRoute("GET", "/api/agents/:agentId/skills", (_req, res, params, token) => {
    const agentId = params.agentId!;
    const snapshot = db.listSnapshot();
    const agent = snapshot.agents.find((a) => a.id === agentId && a.companyId === token.companyId);
    if (!agent) {
      server.json(res, 404, { error: "Agent not found in your company" });
      return;
    }
    const skillIds = db.listAgentSkillAssignments(agentId);
    const skills = skillIds.map((sid) => db.getCompanySkill(token.companyId, sid)).filter(Boolean);
    server.json(res, 200, skills.map((s) => ({
      id: s!.id,
      name: s!.name,
      slug: s!.slug,
      description: s!.description,
      sourceType: s!.sourceType,
      trustLevel: s!.trustLevel,
    })));
  });

  server.addRoute("POST", "/api/agents/:agentId/skills", (_req, res, params, token, body) => {
    const agentId = params.agentId!;
    const parsed = z.object({ skillId: z.string().uuid() }).safeParse(body);
    if (!parsed.success) {
      server.json(res, 400, { error: "Invalid body: skillId (uuid) required" });
      return;
    }
    const snapshot = db.listSnapshot();
    const agent = snapshot.agents.find((a) => a.id === agentId && a.companyId === token.companyId);
    if (!agent) {
      server.json(res, 404, { error: "Agent not found in your company" });
      return;
    }
    const skill = db.getCompanySkill(token.companyId, parsed.data.skillId);
    if (!skill) {
      server.json(res, 404, { error: "Skill not found in your company" });
      return;
    }
    db.assignSkillToAgent(agentId, parsed.data.skillId);
    onDomainChanged();
    server.json(res, 200, { ok: true, message: `Skill "${skill.name}" assigned to agent ${agent.name}` });
  });

  server.addRoute("DELETE", "/api/agents/:agentId/skills/:skillId", (_req, res, params, token) => {
    const agentId = params.agentId!;
    const skillId = params.skillId!;
    const snapshot = db.listSnapshot();
    const agent = snapshot.agents.find((a) => a.id === agentId && a.companyId === token.companyId);
    if (!agent) {
      server.json(res, 404, { error: "Agent not found in your company" });
      return;
    }
    db.removeSkillFromAgent(agentId, skillId);
    onDomainChanged();
    server.json(res, 200, { ok: true, message: `Skill removed from agent ${agent.name}` });
  });
}