// Dev-only review fixture. Imported lazily behind `import.meta.env.DEV` from
// main.ts (`?mock`), so it never ships in a production bundle. It pushes a
// synthetic Snapshot through the store's normal event path.
import type { CatalogStore } from "./events.js";
import type { ActivityState, Session } from "./types.js";

// Rotate inferred activity across the fixture so the debug HUD (#20) shows all
// three states. Keyed off the id's last hex digit for stable variety.
const ACTIVITIES: ActivityState[] = ["Active", "Idle", "AwaitingInput"];

function sess(
  id: string,
  command: string,
  status: "Running" | "Dead",
  cwd: string,
  name?: string,
  blocked_work?: Session["blocked_work"],
): Session {
  const seed = parseInt(id.slice(-1), 16) || 0;
  return {
    id,
    cwd,
    command,
    env: {},
    metadata: name ? { name } : {},
    status,
    created_at: "2026-06-15T12:00:00Z",
    // Inferred fields (#18) so the HUD has real data to render in review.
    foreground: command.split(" ")[0],
    activity: ACTIVITIES[seed % ACTIVITIES.length],
    last_activity_at: new Date(Date.now() - seed * 11_000).toISOString(),
    // The session tree nests by current_cwd; default it to the spawn dir.
    current_cwd: cwd,
    blocked_work,
  };
}

/** Stub the spawn-form backend endpoints (#26/#59) so `?mock&spawn` renders the
 * full flow — presets, projects, gitroot — with no daemon running. Dev-only;
 * delegates every other request to the real `fetch`. */
function stubSpawnApi(): void {
  const real = globalThis.fetch.bind(globalThis);
  const json = (body: unknown) =>
    new Response(JSON.stringify(body), {
      status: 200,
      headers: { "content-type": "application/json" },
    });
  globalThis.fetch = (input: RequestInfo | URL, init?: RequestInit) => {
    const url = typeof input === "string" ? input : input instanceof URL ? input.href : input.url;
    const path = url.startsWith("http") ? new URL(url).pathname + new URL(url).search : url;
    if (path.startsWith("/api/info")) {
      return Promise.resolve(
        json({
          hostname: "thinkpad.lan",
          version: "0.1.0",
          home_dir: "/home/dev",
          presets: [
            { id: "claude", label: "Claude", command: "claude" },
            { id: "opencode", label: "opencode", command: "opencode" },
            { id: "zsh", label: "Shell", command: "zsh" },
            { id: "custom", label: "Custom…", command: "" },
          ],
        }),
      );
    }
    if (path.includes("/projects")) {
      const now = Date.now();
      const iso = (daysAgo: number) => new Date(now - daysAgo * 86_400_000).toISOString();
      return Promise.resolve(
        json([
          {
            path: "/home/dev/git/maestro",
            name: "maestro",
            is_worktree: false,
            last_activity: iso(0),
            last_command: "claude",
          },
          {
            path: "/home/dev/worktrees/maestro-59",
            name: "maestro-59",
            is_worktree: true,
            base_repo: "/home/dev/git/maestro",
            last_activity: iso(1),
            last_command: "opencode",
          },
          {
            path: "/home/dev/git/dotfiles",
            name: "dotfiles",
            is_worktree: false,
            last_activity: iso(30),
            last_command: "zsh",
          },
          {
            path: "/home/dev/work/acme/api",
            name: "api",
            is_worktree: false,
          },
        ]),
      );
    }
    if (path.includes("/gitroot")) {
      const root = path.includes("maestro") || path.includes("dotfiles")
        ? { root: "/home/dev/git/maestro" }
        : {};
      return Promise.resolve(json(root));
    }
    return real(input, init);
  };
}

export function seedMock(store: CatalogStore): void {
  const sessions: Session[] = [
    // ~/git/maestro/web/* — deep dir chain; "~/git/maestro" collapses to one node.
    sess("a1b2c3d4-0000-0000-0000-000000000001", "claude", "Running", "/home/dev/git/maestro/web", "redesign", {
      uncommitted_files: 4,
      untracked_files: 2,
      unpushed_commits: 1,
      insertions: 312,
      deletions: 47,
    }),
    sess("a1b2c3d4-0000-0000-0000-000000000002", "vite dev", "Running", "/home/dev/git/maestro/web", "dev-server"),
    sess("a1b2c3d4-0000-0000-0000-000000000003", "bash", "Dead", "/home/dev/git/maestro/web", "scratch"),
    sess("a1b2c3d4-0000-0000-0000-000000000004", "codex --resume", "Running", "/home/dev/git/maestro/web/tests", "e2e-fixes", {
      uncommitted_files: 1,
    }),
    // ~/git/maestro/crates/* — sibling subtree under the same repo.
    sess("a1b2c3d4-0000-0000-0000-000000000005", "claude", "Running", "/home/dev/git/maestro/crates/daemon", "daemon-work"),
    sess("a1b2c3d4-0000-0000-0000-000000000006", "cargo watch -x test", "Running", "/home/dev/git/maestro/crates/daemon", "test-loop"),
    sess("a1b2c3d4-0000-0000-0000-000000000007", "cargo run -- daemon", "Running", "/home/dev/git/maestro/crates/daemon", "daemon"),
    // ~/work/acme/* — a separate top-level dir on the same host.
    sess("a1b2c3d4-0000-0000-0000-000000000008", "gemini", "Running", "/home/dev/work/acme/api", "billing-api", {
      untracked_files: 3,
    }),
    sess("a1b2c3d4-0000-0000-0000-000000000009", "pnpm dev", "Dead", "/home/dev/work/acme/web", "dashboard"),
    // ~/git/dotfiles — single session, fully collapsed chain.
    sess("a1b2c3d4-0000-0000-0000-000000000010", "opencode", "Running", "/home/dev/git/dotfiles", "dotfiles"),
    sess("a1b2c3d4-0000-0000-0000-000000000011", "btop", "Running", "/home/dev/git/infra", "monitor"),
    // outside any home dir → shown verbatim (no ~ collapse).
    sess("a1b2c3d4-0000-0000-0000-000000000012", "ssh gateway", "Dead", "/etc"),
    // home root — a leaf directly under ~ (name from command).
    sess("a1b2c3d4-0000-0000-0000-000000000013", "htop", "Running", "/home/dev"),
  ];
  // The store applies CatalogEvents internally; feed a Snapshot the same way
  // the WS would. `apply` is private, so reach it through an index cast.
  (store as unknown as { apply: (e: unknown) => void }).apply({
    type: "Snapshot",
    sessions,
  });

  // `?mock&spawn` auto-opens a draft pane for visual review, with the spawn
  // backend endpoints stubbed so presets/projects/gitroot all render.
  if (location.search.includes("spawn")) {
    stubSpawnApi();
    document.dispatchEvent(new CustomEvent("catalog-open-spawn"));
  }
}