/**
 * project_register — Register a new project with DevClaw.
 *
 * Atomically: validates repo, detects GitHub/GitLab provider, creates all 8 state labels (idempotent),
 * adds project entry to projects.json, and logs the event.
 *
 * Replaces the manual steps of running glab/gh label create + editing projects.json.
 */
import { jsonResult } from "openclaw/plugin-sdk";
import type { ToolContext } from "../types.js";
import fs from "node:fs/promises";
import path from "node:path";
import { readProjects, writeProjects, emptyWorkerState } from "../projects.js";
import { resolveRepoPath } from "../projects.js";
import { createProvider } from "../providers/index.js";
import { log as auditLog } from "../audit.js";
import { getAllRoleIds, getLevelsForRole } from "../roles/index.js";
import { ExecutionMode, getRoleLabels } from "../workflow.js";
import { loadConfig } from "../config/index.js";
import { DEFAULT_ROLE_INSTRUCTIONS } from "../templates.js";
import { DATA_DIR } from "../setup/migrate-layout.js";

/**
 * Scaffold project-specific prompt files for all registered roles.
 * Returns true if files were created, false if they already existed.
 */
async function scaffoldPromptFiles(workspaceDir: string, projectName: string): Promise<boolean> {
  const promptsDir = path.join(workspaceDir, DATA_DIR, "projects", projectName, "prompts");
  await fs.mkdir(promptsDir, { recursive: true });

  let created = false;
  for (const role of getAllRoleIds()) {
    const filePath = path.join(promptsDir, `${role}.md`);
    try {
      await fs.access(filePath);
    } catch {
      const content = DEFAULT_ROLE_INSTRUCTIONS[role] ?? `# ${role.toUpperCase()} Worker Instructions\n\nAdd role-specific instructions here.\n`;
      await fs.writeFile(filePath, content, "utf-8");
      created = true;
    }
  }

  return created;
}

export function createProjectRegisterTool() {
  return (ctx: ToolContext) => ({
    name: "project_register",
    label: "Project Register",
    description: `Register a new project with DevClaw. Creates state labels, adds to projects.json. One-time setup per project.`,
    parameters: {
      type: "object",
      required: ["projectGroupId", "name", "repo", "baseBranch"],
      properties: {
        projectGroupId: {
          type: "string",
          description: "Project group ID (e.g. Telegram/WhatsApp group ID)",
        },
        name: {
          type: "string",
          description: "Short project name (e.g. 'my-webapp')",
        },
        repo: {
          type: "string",
          description: "Path to git repo (e.g. '~/git/my-project')",
        },
        channel: {
          type: "string",
          description: "Channel type (e.g. 'telegram', 'whatsapp'). Defaults to 'telegram'.",
        },
        groupName: {
          type: "string",
          description: "Group display name (optional - defaults to 'Project: {name}')",
        },
        baseBranch: {
          type: "string",
          description: "Base branch for development (e.g. 'development', 'main')",
        },
        deployBranch: {
          type: "string",
          description: "Branch that triggers deployment. Defaults to baseBranch.",
        },
        deployUrl: {
          type: "string",
          description: "Deployment URL for the project",
        },
        roleExecution: {
          type: "string",
          enum: Object.values(ExecutionMode),
          description: "Project-level role execution mode: parallel (DEV and QA can work simultaneously) or sequential (only one role active at a time). Defaults to parallel.",
        },
      },
    },

    async execute(_id: string, params: Record<string, unknown>) {
      const groupId = params.projectGroupId as string;
      const name = params.name as string;
      const repo = params.repo as string;
      const channel = (params.channel as string) ?? "telegram";
      const groupName = (params.groupName as string) ?? `Project: ${name}`;
      const baseBranch = params.baseBranch as string;
      const deployBranch = (params.deployBranch as string) ?? baseBranch;
      const deployUrl = (params.deployUrl as string) ?? "";
      const roleExecution = (params.roleExecution as ExecutionMode) ?? ExecutionMode.PARALLEL;
      const workspaceDir = ctx.workspaceDir;

      if (!workspaceDir) {
        throw new Error("No workspace directory available in tool context");
      }

      // 1. Check project not already registered (allow re-register if incomplete)
      const data = await readProjects(workspaceDir);
      const existing = data.projects[groupId];
      const existingWorkers = existing?.workers ?? {};
      if (existing && Object.values(existingWorkers).some(w => w.sessions && Object.keys(w.sessions).length > 0)) {
        throw new Error(
          `Project already registered for this group: "${existing.name}". Remove the existing entry first or use a different group.`,
        );
      }

      // 2. Resolve repo path
      const repoPath = resolveRepoPath(repo);

      // 3. Create provider and verify it works
      const { provider, type: providerType } = await createProvider({ repo });

      const healthy = await provider.healthCheck();
      if (!healthy) {
        let cliName = "";
        let cliInstallUrl = "";
        
        if (providerType === "github") {
          cliName = "gh";
          cliInstallUrl = "https://cli.github.com";
        } else if (providerType === "gitlab") {
          cliName = "glab";
          cliInstallUrl = "https://gitlab.com/gitlab-org/cli";
        } else if (providerType === "gitea") {
          cliName = "curl";
          cliInstallUrl = "https://curl.se";
        }
        
        throw new Error(
          `${providerType.toUpperCase()} health check failed for ${repoPath}. ` +
          `Detected provider: ${providerType}. ` +
          `Ensure '${cliName}' CLI is installed, authenticated (${cliName} auth status), ` +
          `and the repo has a ${providerType.toUpperCase()} remote. ` +
          `Install ${cliName} from: ${cliInstallUrl}`
        );
      }

      // 4. Create all state labels (idempotent)
      await provider.ensureAllStateLabels();

      // 4b. Create role:level + step routing labels (e.g. developer:junior, review:human, test:skip)
      const resolvedConfig = await loadConfig(workspaceDir, name);
      const roleLabels = getRoleLabels(resolvedConfig.roles);
      for (const { name: labelName, color } of roleLabels) {
        await provider.ensureLabel(labelName, color);
      }

      // 5. Add project to projects.json
      // Build workers map from all registered roles
      const workers: Record<string, import("../projects.js").WorkerState> = {};
      for (const role of getAllRoleIds()) {
        workers[role] = emptyWorkerState([...getLevelsForRole(role)]);
      }

      data.projects[groupId] = {
        name,
        repo,
        groupName,
        deployUrl,
        baseBranch,
        deployBranch,
        channel,
        provider: providerType,
        roleExecution,
        workers,
      };

      await writeProjects(workspaceDir, data);

      // 6. Scaffold prompt files
      const promptsCreated = await scaffoldPromptFiles(workspaceDir, name);

      // 7. Audit log
      await auditLog(workspaceDir, "project_register", {
        project: name,
        groupId,
        repo,
        baseBranch,
        deployBranch,
        deployUrl: deployUrl || null,
      });

      // 8. Return announcement
      const promptsNote = promptsCreated ? " Prompt files scaffolded." : "";
      const announcement = `Project "${name}" registered for group ${groupName}. Labels created.${promptsNote} Ready for tasks.`;

      return jsonResult({
        success: true,
        project: name,
        groupId,
        repo,
        baseBranch,
        deployBranch,
        labelsCreated: 10,
        promptsScaffolded: promptsCreated,
        announcement,
      });
    },
  });
}