import { Router, type Request } from "express";
import type { Db } from "@paperclipai/db";
import {
  createProjectSchema,
  createProjectWorkspaceSchema,
  isUuidLike,
  updateProjectSchema,
  updateProjectWorkspaceSchema,
} from "@paperclipai/shared";
import { validate } from "../middleware/validate.js";
import { projectService, logActivity, workspaceOperationService } from "../services/index.js";
import { conflict } from "../errors.js";
import { assertCompanyAccess, getActorInfo } from "./authz.js";
import { startRuntimeServicesForWorkspaceControl, stopRuntimeServicesForProjectWorkspace } from "../services/workspace-runtime.js";

export function projectRoutes(db: Db) {
  const router = Router();
  const svc = projectService(db);
  const workspaceOperations = workspaceOperationService(db);

  async function resolveCompanyIdForProjectReference(req: Request) {
    const companyIdQuery = req.query.companyId;
    const requestedCompanyId =
      typeof companyIdQuery === "string" && companyIdQuery.trim().length > 0
        ? companyIdQuery.trim()
        : null;
    if (requestedCompanyId) {
      assertCompanyAccess(req, requestedCompanyId);
      return requestedCompanyId;
    }
    if (req.actor.type === "agent" && req.actor.companyId) {
      return req.actor.companyId;
    }
    return null;
  }

  async function normalizeProjectReference(req: Request, rawId: string) {
    if (isUuidLike(rawId)) return rawId;
    const companyId = await resolveCompanyIdForProjectReference(req);
    if (!companyId) return rawId;
    const resolved = await svc.resolveByReference(companyId, rawId);
    if (resolved.ambiguous) {
      throw conflict("Project shortname is ambiguous in this company. Use the project ID.");
    }
    return resolved.project?.id ?? rawId;
  }

  router.param("id", async (req, _res, next, rawId) => {
    try {
      req.params.id = await normalizeProjectReference(req, rawId);
      next();
    } catch (err) {
      next(err);
    }
  });

  router.get("/companies/:companyId/projects", async (req, res) => {
    const companyId = req.params.companyId as string;
    assertCompanyAccess(req, companyId);
    const result = await svc.list(companyId);
    res.json(result);
  });

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

  router.post("/companies/:companyId/projects", validate(createProjectSchema), async (req, res) => {
    const companyId = req.params.companyId as string;
    assertCompanyAccess(req, companyId);
    type CreateProjectPayload = Parameters<typeof svc.create>[1] & {
      workspace?: Parameters<typeof svc.createWorkspace>[1];
    };

    const { workspace, ...projectData } = req.body as CreateProjectPayload;
    const project = await svc.create(companyId, projectData);
    let createdWorkspaceId: string | null = null;
    if (workspace) {
      const createdWorkspace = await svc.createWorkspace(project.id, workspace);
      if (!createdWorkspace) {
        await svc.remove(project.id);
        res.status(422).json({ error: "Invalid project workspace payload" });
        return;
      }
      createdWorkspaceId = createdWorkspace.id;
    }
    const hydratedProject = workspace ? await svc.getById(project.id) : project;

    const actor = getActorInfo(req);
    await logActivity(db, {
      companyId,
      actorType: actor.actorType,
      actorId: actor.actorId,
      agentId: actor.agentId,
      action: "project.created",
      entityType: "project",
      entityId: project.id,
      details: {
        name: project.name,
        workspaceId: createdWorkspaceId,
      },
    });
    res.status(201).json(hydratedProject ?? project);
  });

  router.patch("/projects/:id", validate(updateProjectSchema), async (req, res) => {
    const id = req.params.id as string;
    const existing = await svc.getById(id);
    if (!existing) {
      res.status(404).json({ error: "Project not found" });
      return;
    }
    assertCompanyAccess(req, existing.companyId);
    const body = { ...req.body };
    if (typeof body.archivedAt === "string") {
      body.archivedAt = new Date(body.archivedAt);
    }
    const project = await svc.update(id, body);
    if (!project) {
      res.status(404).json({ error: "Project not found" });
      return;
    }

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

    res.json(project);
  });

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

  router.post("/projects/:id/workspaces", validate(createProjectWorkspaceSchema), async (req, res) => {
    const id = req.params.id as string;
    const existing = await svc.getById(id);
    if (!existing) {
      res.status(404).json({ error: "Project not found" });
      return;
    }
    assertCompanyAccess(req, existing.companyId);
    const workspace = await svc.createWorkspace(id, req.body);
    if (!workspace) {
      res.status(422).json({ error: "Invalid project workspace payload" });
      return;
    }

    const actor = getActorInfo(req);
    await logActivity(db, {
      companyId: existing.companyId,
      actorType: actor.actorType,
      actorId: actor.actorId,
      agentId: actor.agentId,
      action: "project.workspace_created",
      entityType: "project",
      entityId: id,
      details: {
        workspaceId: workspace.id,
        name: workspace.name,
        cwd: workspace.cwd,
        isPrimary: workspace.isPrimary,
      },
    });

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

  router.patch(
    "/projects/:id/workspaces/:workspaceId",
    validate(updateProjectWorkspaceSchema),
    async (req, res) => {
      const id = req.params.id as string;
      const workspaceId = req.params.workspaceId as string;
      const existing = await svc.getById(id);
      if (!existing) {
        res.status(404).json({ error: "Project not found" });
        return;
      }
      assertCompanyAccess(req, existing.companyId);
      const workspaceExists = (await svc.listWorkspaces(id)).some((workspace) => workspace.id === workspaceId);
      if (!workspaceExists) {
        res.status(404).json({ error: "Project workspace not found" });
        return;
      }
      const workspace = await svc.updateWorkspace(id, workspaceId, req.body);
      if (!workspace) {
        res.status(422).json({ error: "Invalid project workspace payload" });
        return;
      }

      const actor = getActorInfo(req);
      await logActivity(db, {
        companyId: existing.companyId,
        actorType: actor.actorType,
        actorId: actor.actorId,
        agentId: actor.agentId,
        action: "project.workspace_updated",
        entityType: "project",
        entityId: id,
        details: {
          workspaceId: workspace.id,
          changedKeys: Object.keys(req.body).sort(),
        },
      });

      res.json(workspace);
    },
  );

  router.post("/projects/:id/workspaces/:workspaceId/runtime-services/:action", async (req, res) => {
    const id = req.params.id as string;
    const workspaceId = req.params.workspaceId as string;
    const action = String(req.params.action ?? "").trim().toLowerCase();
    if (action !== "start" && action !== "stop" && action !== "restart") {
      res.status(404).json({ error: "Runtime service action not found" });
      return;
    }

    const project = await svc.getById(id);
    if (!project) {
      res.status(404).json({ error: "Project not found" });
      return;
    }
    assertCompanyAccess(req, project.companyId);

    const workspace = project.workspaces.find((entry) => entry.id === workspaceId) ?? null;
    if (!workspace) {
      res.status(404).json({ error: "Project workspace not found" });
      return;
    }

    const workspaceCwd = workspace.cwd;
    if (!workspaceCwd) {
      res.status(422).json({ error: "Project workspace needs a local path before Paperclip can manage local runtime services" });
      return;
    }

    const runtimeConfig = workspace.runtimeConfig?.workspaceRuntime ?? null;
    if ((action === "start" || action === "restart") && !runtimeConfig) {
      res.status(422).json({ error: "Project workspace has no runtime service configuration" });
      return;
    }

    const actor = getActorInfo(req);
    const recorder = workspaceOperations.createRecorder({ companyId: project.companyId });
    let runtimeServiceCount = workspace.runtimeServices?.length ?? 0;
    const stdout: string[] = [];
    const stderr: string[] = [];

    const operation = await recorder.recordOperation({
      phase: action === "stop" ? "workspace_teardown" : "workspace_provision",
      command: `workspace runtime ${action}`,
      cwd: workspace.cwd,
      metadata: {
        action,
        projectId: project.id,
        projectWorkspaceId: workspace.id,
      },
      run: async () => {
        const onLog = async (stream: "stdout" | "stderr", chunk: string) => {
          if (stream === "stdout") stdout.push(chunk);
          else stderr.push(chunk);
        };

        if (action === "stop" || action === "restart") {
          await stopRuntimeServicesForProjectWorkspace({
            db,
            projectWorkspaceId: workspace.id,
          });
        }

        if (action === "start" || action === "restart") {
          const startedServices = await startRuntimeServicesForWorkspaceControl({
            db,
            actor: {
              id: actor.agentId ?? null,
              name: actor.actorType === "user" ? "Board" : "Agent",
              companyId: project.companyId,
            },
            issue: null,
            workspace: {
              baseCwd: workspaceCwd,
              source: "project_primary",
              projectId: project.id,
              workspaceId: workspace.id,
              repoUrl: workspace.repoUrl,
              repoRef: workspace.repoRef,
              strategy: "project_primary",
              cwd: workspaceCwd,
              branchName: workspace.defaultRef ?? workspace.repoRef ?? null,
              worktreePath: null,
              warnings: [],
              created: false,
            },
            config: { workspaceRuntime: runtimeConfig },
            adapterEnv: {},
            onLog,
          });
          runtimeServiceCount = startedServices.length;
        } else {
          runtimeServiceCount = 0;
        }

        await svc.updateWorkspace(project.id, workspace.id, {
          runtimeConfig: {
            desiredState: action === "stop" ? "stopped" : "running",
          },
        });

        return {
          status: "succeeded",
          stdout: stdout.join(""),
          stderr: stderr.join(""),
          system:
            action === "stop"
              ? "Stopped project workspace runtime services.\n"
              : action === "restart"
                ? "Restarted project workspace runtime services.\n"
                : "Started project workspace runtime services.\n",
          metadata: {
            runtimeServiceCount,
          },
        };
      },
    });

    const updatedWorkspace = (await svc.listWorkspaces(project.id)).find((entry) => entry.id === workspace.id) ?? workspace;

    await logActivity(db, {
      companyId: project.companyId,
      actorType: actor.actorType,
      actorId: actor.actorId,
      agentId: actor.agentId,
      action: `project.workspace_runtime_${action}`,
      entityType: "project",
      entityId: project.id,
      details: {
        projectWorkspaceId: workspace.id,
        runtimeServiceCount,
      },
    });

    res.json({
      workspace: updatedWorkspace,
      operation,
    });
  });

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

    const actor = getActorInfo(req);
    await logActivity(db, {
      companyId: existing.companyId,
      actorType: actor.actorType,
      actorId: actor.actorId,
      agentId: actor.agentId,
      action: "project.workspace_deleted",
      entityType: "project",
      entityId: id,
      details: {
        workspaceId: workspace.id,
        name: workspace.name,
      },
    });

    res.json(workspace);
  });

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

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

    res.json(project);
  });

  return router;
}