import { Router } from "express";
import type { Db } from "@paperclip/db";
import {
  addIssueCommentSchema,
  checkoutIssueSchema,
  createIssueSchema,
  updateIssueSchema,
} from "@paperclip/shared";
import { validate } from "../middleware/validate.js";
import { issueService, logActivity } from "../services/index.js";
import { assertCompanyAccess, getActorInfo } from "./authz.js";

export function issueRoutes(db: Db) {
  const router = Router();
  const svc = issueService(db);

  router.get("/companies/:companyId/issues", async (req, res) => {
    const companyId = req.params.companyId as string;
    assertCompanyAccess(req, companyId);
    const result = await svc.list(companyId, {
      status: req.query.status as string | undefined,
      assigneeAgentId: req.query.assigneeAgentId as string | undefined,
      projectId: req.query.projectId as string | undefined,
    });
    res.json(result);
  });

  router.get("/issues/:id", async (req, res) => {
    const id = req.params.id as string;
    const issue = await svc.getById(id);
    if (!issue) {
      res.status(404).json({ error: "Issue not found" });
      return;
    }
    assertCompanyAccess(req, issue.companyId);
    res.json(issue);
  });

  router.post("/companies/:companyId/issues", validate(createIssueSchema), async (req, res) => {
    const companyId = req.params.companyId as string;
    assertCompanyAccess(req, companyId);

    const actor = getActorInfo(req);
    const issue = await svc.create(companyId, {
      ...req.body,
      createdByAgentId: actor.agentId,
      createdByUserId: actor.actorType === "user" ? actor.actorId : null,
    });

    await logActivity(db, {
      companyId,
      actorType: actor.actorType,
      actorId: actor.actorId,
      agentId: actor.agentId,
      action: "issue.created",
      entityType: "issue",
      entityId: issue.id,
      details: { title: issue.title },
    });

    res.status(201).json(issue);
  });

  router.patch("/issues/:id", validate(updateIssueSchema), async (req, res) => {
    const id = req.params.id as string;
    const existing = await svc.getById(id);
    if (!existing) {
      res.status(404).json({ error: "Issue not found" });
      return;
    }
    assertCompanyAccess(req, existing.companyId);

    const issue = await svc.update(id, req.body);
    if (!issue) {
      res.status(404).json({ error: "Issue not found" });
      return;
    }

    const actor = getActorInfo(req);
    await logActivity(db, {
      companyId: issue.companyId,
      actorType: actor.actorType,
      actorId: actor.actorId,
      agentId: actor.agentId,
      action: "issue.updated",
      entityType: "issue",
      entityId: issue.id,
      details: req.body,
    });

    res.json(issue);
  });

  router.delete("/issues/:id", async (req, res) => {
    const id = req.params.id as string;
    const existing = await svc.getById(id);
    if (!existing) {
      res.status(404).json({ error: "Issue not found" });
      return;
    }
    assertCompanyAccess(req, existing.companyId);

    const issue = await svc.remove(id);
    if (!issue) {
      res.status(404).json({ error: "Issue not found" });
      return;
    }

    const actor = getActorInfo(req);
    await logActivity(db, {
      companyId: issue.companyId,
      actorType: actor.actorType,
      actorId: actor.actorId,
      agentId: actor.agentId,
      action: "issue.deleted",
      entityType: "issue",
      entityId: issue.id,
    });

    res.json(issue);
  });

  router.post("/issues/:id/checkout", validate(checkoutIssueSchema), async (req, res) => {
    const id = req.params.id as string;
    const issue = await svc.getById(id);
    if (!issue) {
      res.status(404).json({ error: "Issue not found" });
      return;
    }
    assertCompanyAccess(req, issue.companyId);

    if (req.actor.type === "agent" && req.actor.agentId !== req.body.agentId) {
      res.status(403).json({ error: "Agent can only checkout as itself" });
      return;
    }

    const updated = await svc.checkout(id, req.body.agentId, req.body.expectedStatuses);
    const actor = getActorInfo(req);

    await logActivity(db, {
      companyId: issue.companyId,
      actorType: actor.actorType,
      actorId: actor.actorId,
      agentId: actor.agentId,
      action: "issue.checked_out",
      entityType: "issue",
      entityId: issue.id,
      details: { agentId: req.body.agentId },
    });

    res.json(updated);
  });

  router.post("/issues/:id/release", async (req, res) => {
    const id = req.params.id as string;
    const existing = await svc.getById(id);
    if (!existing) {
      res.status(404).json({ error: "Issue not found" });
      return;
    }
    assertCompanyAccess(req, existing.companyId);

    const released = await svc.release(id, req.actor.type === "agent" ? req.actor.agentId : undefined);
    if (!released) {
      res.status(404).json({ error: "Issue not found" });
      return;
    }

    const actor = getActorInfo(req);
    await logActivity(db, {
      companyId: released.companyId,
      actorType: actor.actorType,
      actorId: actor.actorId,
      agentId: actor.agentId,
      action: "issue.released",
      entityType: "issue",
      entityId: released.id,
    });

    res.json(released);
  });

  router.get("/issues/:id/comments", async (req, res) => {
    const id = req.params.id as string;
    const issue = await svc.getById(id);
    if (!issue) {
      res.status(404).json({ error: "Issue not found" });
      return;
    }
    assertCompanyAccess(req, issue.companyId);
    const comments = await svc.listComments(id);
    res.json(comments);
  });

  router.post("/issues/:id/comments", validate(addIssueCommentSchema), async (req, res) => {
    const id = req.params.id as string;
    const issue = await svc.getById(id);
    if (!issue) {
      res.status(404).json({ error: "Issue not found" });
      return;
    }
    assertCompanyAccess(req, issue.companyId);

    const actor = getActorInfo(req);
    const comment = await svc.addComment(id, req.body.body, {
      agentId: actor.agentId ?? undefined,
      userId: actor.actorType === "user" ? actor.actorId : undefined,
    });

    await logActivity(db, {
      companyId: issue.companyId,
      actorType: actor.actorType,
      actorId: actor.actorId,
      agentId: actor.agentId,
      action: "issue.comment_added",
      entityType: "issue",
      entityId: issue.id,
      details: { commentId: comment.id },
    });

    res.status(201).json(comment);
  });

  return router;
}