import { mkdtempSync, mkdirSync, rmSync, symlinkSync, writeFileSync } from "node:fs";
import os from "node:os";
import path from "node:path";
import { afterEach, describe, expect, it } from "vitest";
import { getFusionSkillSourceCandidates, installFusionSkillIntoHermesHome, resolveBundledFusionSkillSourceFromCandidates, } from "../fusion-skill-install.js";
const tempDirs = [];
function tempDir(prefix) {
    const dir = mkdtempSync(path.join(os.tmpdir(), prefix));
    tempDirs.push(dir);
    return dir;
}
function makeSkillSource(dir) {
    mkdirSync(dir, { recursive: true });
    writeFileSync(path.join(dir, "SKILL.md"), "# Fusion Skill\n");
}
afterEach(() => {
    delete process.env.HERMES_HOME;
    for (const dir of tempDirs.splice(0))
        rmSync(dir, { recursive: true, force: true });
});
describe("fusion skill installer", () => {
    it("resolves workspace and packaged candidate layouts", () => {
        const workspaceCandidates = getFusionSkillSourceCandidates("file:///repo/plugins/fusion-plugin-hermes-runtime/src/index.ts");
        expect(workspaceCandidates[0].replace(/\\/g, "/")).toMatch(/\/packages\/cli\/skill\/fusion$/);
        const packagedCandidates = getFusionSkillSourceCandidates("file:///repo/packages/cli/dist/plugins/fusion-plugin-hermes-runtime/bundled.js");
        expect(packagedCandidates.some((candidate) => candidate.replace(/\\/g, "/").endsWith("/packages/cli/dist/skill/fusion"))).toBe(true);
    });
    it("installs skill for configured Hermes home", () => {
        const home = tempDir("hermes-home-");
        const source = path.join(tempDir("fusion-source-"), "fusion");
        makeSkillSource(source);
        process.env.HERMES_HOME = home;
        const result = installFusionSkillIntoHermesHome({ sourceDir: source });
        expect(result.outcome).toBe("installed");
        expect(result.targetDir).toBe(path.join(home, "skills", "fusion"));
    });
    it("no-ops when already installed to same source", () => {
        const home = tempDir("hermes-home-");
        const source = path.join(tempDir("fusion-source-"), "fusion");
        makeSkillSource(source);
        process.env.HERMES_HOME = home;
        expect(installFusionSkillIntoHermesHome({ sourceDir: source }).outcome).toBe("installed");
        expect(installFusionSkillIntoHermesHome({ sourceDir: source }).outcome).toBe("already-installed");
    });
    it("replaces prior fusion directory install safely", () => {
        const home = tempDir("hermes-home-");
        const source = path.join(tempDir("fusion-source-"), "fusion");
        makeSkillSource(source);
        process.env.HERMES_HOME = home;
        const target = path.join(home, "skills", "fusion");
        makeSkillSource(target);
        writeFileSync(path.join(target, "old.txt"), "stale");
        const result = installFusionSkillIntoHermesHome({ sourceDir: source });
        expect(result.outcome).toBe("replaced");
    });
    it("skips replacement for unrelated existing directory", () => {
        const home = tempDir("hermes-home-");
        const source = path.join(tempDir("fusion-source-"), "fusion");
        makeSkillSource(source);
        process.env.HERMES_HOME = home;
        const target = path.join(home, "skills", "fusion");
        mkdirSync(target, { recursive: true });
        writeFileSync(path.join(target, "README.md"), "my custom skill");
        const result = installFusionSkillIntoHermesHome({ sourceDir: source });
        expect(result.outcome).toBe("skipped");
    });
    it("warns when source is missing", () => {
        const home = tempDir("hermes-home-");
        process.env.HERMES_HOME = home;
        const result = installFusionSkillIntoHermesHome({ sourceDir: null });
        expect(result.outcome).toBe("warning");
    });
    it("can resolve first existing candidate", () => {
        const source = path.join(tempDir("fusion-source-"), "fusion");
        makeSkillSource(source);
        const resolved = resolveBundledFusionSkillSourceFromCandidates(["/missing", source]);
        expect(resolved).toBe(source);
    });
    it("replaces stale fusion symlink", () => {
        const home = tempDir("hermes-home-");
        const source = path.join(tempDir("fusion-source-"), "fusion");
        const oldSource = path.join(tempDir("fusion-old-source-"), "fusion");
        makeSkillSource(source);
        makeSkillSource(oldSource);
        process.env.HERMES_HOME = home;
        const target = path.join(home, "skills", "fusion");
        mkdirSync(path.dirname(target), { recursive: true });
        symlinkSync(oldSource, target, "dir");
        const result = installFusionSkillIntoHermesHome({ sourceDir: source });
        expect(result.outcome).toBe("replaced");
    });
});
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