import fs from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

import { describe, expect, it } from "vitest";
import {
  buildWorkspaceSkillStatus,
  type SkillStatusEntry,
  type SkillStatusReport,
} from "../agents/skills-status.js";
import {
  formatSkillInfo,
  formatSkillsCheck,
  formatSkillsList,
} from "./skills-cli.js";

function createMockSkill(
  overrides: Partial<SkillStatusEntry> = {},
): SkillStatusEntry {
  return {
    name: "test-skill",
    description: "A test skill",
    source: "bundled",
    filePath: "/path/to/SKILL.md",
    baseDir: "/path/to",
    skillKey: "test-skill",
    emoji: "🧪",
    homepage: "https://example.com",
    always: false,
    disabled: false,
    blockedByAllowlist: false,
    eligible: true,
    requirements: {
      bins: [],
      anyBins: [],
      env: [],
      config: [],
      os: [],
    },
    missing: {
      bins: [],
      anyBins: [],
      env: [],
      config: [],
      os: [],
    },
    configChecks: [],
    install: [],
    ...overrides,
  };
}

function createMockReport(skills: SkillStatusEntry[]): SkillStatusReport {
  return {
    workspaceDir: "/workspace",
    managedSkillsDir: "/managed",
    skills,
  };
}

describe("skills-cli", () => {
  describe("formatSkillsList", () => {
    it("formats empty skills list", () => {
      const report = createMockReport([]);
      const output = formatSkillsList(report, {});
      expect(output).toContain("No skills found");
      expect(output).toContain("npx clawdhub");
    });

    it("formats skills list with eligible skill", () => {
      const report = createMockReport([
        createMockSkill({
          name: "peekaboo",
          description: "Capture UI screenshots",
          emoji: "📸",
          eligible: true,
        }),
      ]);
      const output = formatSkillsList(report, {});
      expect(output).toContain("peekaboo");
      expect(output).toContain("📸");
      expect(output).toContain("✓");
    });

    it("formats skills list with disabled skill", () => {
      const report = createMockReport([
        createMockSkill({
          name: "disabled-skill",
          disabled: true,
          eligible: false,
        }),
      ]);
      const output = formatSkillsList(report, {});
      expect(output).toContain("disabled-skill");
      expect(output).toContain("disabled");
    });

    it("formats skills list with missing requirements", () => {
      const report = createMockReport([
        createMockSkill({
          name: "needs-stuff",
          eligible: false,
          missing: {
            bins: ["ffmpeg"],
            anyBins: ["rg", "grep"],
            env: ["API_KEY"],
            config: [],
            os: ["darwin"],
          },
        }),
      ]);
      const output = formatSkillsList(report, { verbose: true });
      expect(output).toContain("needs-stuff");
      expect(output).toContain("missing");
      expect(output).toContain("anyBins");
      expect(output).toContain("os:");
    });

    it("filters to eligible only with --eligible flag", () => {
      const report = createMockReport([
        createMockSkill({ name: "eligible-one", eligible: true }),
        createMockSkill({
          name: "not-eligible",
          eligible: false,
          disabled: true,
        }),
      ]);
      const output = formatSkillsList(report, { eligible: true });
      expect(output).toContain("eligible-one");
      expect(output).not.toContain("not-eligible");
    });

    it("outputs JSON with --json flag", () => {
      const report = createMockReport([
        createMockSkill({ name: "json-skill" }),
      ]);
      const output = formatSkillsList(report, { json: true });
      const parsed = JSON.parse(output);
      expect(parsed.skills).toHaveLength(1);
      expect(parsed.skills[0].name).toBe("json-skill");
    });
  });

  describe("formatSkillInfo", () => {
    it("returns not found message for unknown skill", () => {
      const report = createMockReport([]);
      const output = formatSkillInfo(report, "unknown-skill", {});
      expect(output).toContain("not found");
      expect(output).toContain("npx clawdhub");
    });

    it("shows detailed info for a skill", () => {
      const report = createMockReport([
        createMockSkill({
          name: "detailed-skill",
          description: "A detailed description",
          homepage: "https://example.com",
          requirements: {
            bins: ["node"],
            anyBins: ["rg", "grep"],
            env: ["API_KEY"],
            config: [],
            os: [],
          },
          missing: {
            bins: [],
            anyBins: [],
            env: ["API_KEY"],
            config: [],
            os: [],
          },
        }),
      ]);
      const output = formatSkillInfo(report, "detailed-skill", {});
      expect(output).toContain("detailed-skill");
      expect(output).toContain("A detailed description");
      expect(output).toContain("https://example.com");
      expect(output).toContain("node");
      expect(output).toContain("Any binaries");
      expect(output).toContain("API_KEY");
    });

    it("outputs JSON with --json flag", () => {
      const report = createMockReport([
        createMockSkill({ name: "info-skill" }),
      ]);
      const output = formatSkillInfo(report, "info-skill", { json: true });
      const parsed = JSON.parse(output);
      expect(parsed.name).toBe("info-skill");
    });
  });

  describe("formatSkillsCheck", () => {
    it("shows summary of skill status", () => {
      const report = createMockReport([
        createMockSkill({ name: "ready-1", eligible: true }),
        createMockSkill({ name: "ready-2", eligible: true }),
        createMockSkill({
          name: "not-ready",
          eligible: false,
          missing: { bins: ["go"], anyBins: [], env: [], config: [], os: [] },
        }),
        createMockSkill({ name: "disabled", eligible: false, disabled: true }),
      ]);
      const output = formatSkillsCheck(report, {});
      expect(output).toContain("2"); // eligible count
      expect(output).toContain("ready-1");
      expect(output).toContain("ready-2");
      expect(output).toContain("not-ready");
      expect(output).toContain("go"); // missing binary
      expect(output).toContain("npx clawdhub");
    });

    it("outputs JSON with --json flag", () => {
      const report = createMockReport([
        createMockSkill({ name: "skill-1", eligible: true }),
        createMockSkill({ name: "skill-2", eligible: false }),
      ]);
      const output = formatSkillsCheck(report, { json: true });
      const parsed = JSON.parse(output);
      expect(parsed.summary.eligible).toBe(1);
      expect(parsed.summary.total).toBe(2);
    });
  });

  describe("integration: loads real skills from bundled directory", () => {
    function resolveBundledSkillsDir(): string | undefined {
      const moduleDir = path.dirname(fileURLToPath(import.meta.url));
      const root = path.resolve(moduleDir, "..", "..");
      const candidate = path.join(root, "skills");
      if (fs.existsSync(candidate)) return candidate;
      return undefined;
    }

    it("loads bundled skills and formats them", () => {
      const bundledDir = resolveBundledSkillsDir();
      if (!bundledDir) {
        // Skip if skills dir not found (e.g., in CI without skills)
        return;
      }

      const report = buildWorkspaceSkillStatus("/tmp", {
        managedSkillsDir: "/nonexistent",
      });

      // Should have loaded some skills
      expect(report.skills.length).toBeGreaterThan(0);

      // Format should work without errors
      const listOutput = formatSkillsList(report, {});
      expect(listOutput).toContain("Skills");

      const checkOutput = formatSkillsCheck(report, {});
      expect(checkOutput).toContain("Total:");

      // JSON output should be valid
      const jsonOutput = formatSkillsList(report, { json: true });
      const parsed = JSON.parse(jsonOutput);
      expect(parsed.skills).toBeInstanceOf(Array);
    });

    it("formats info for a real bundled skill (peekaboo)", () => {
      const bundledDir = resolveBundledSkillsDir();
      if (!bundledDir) return;

      const report = buildWorkspaceSkillStatus("/tmp", {
        managedSkillsDir: "/nonexistent",
      });

      // peekaboo is a bundled skill that should always exist
      const peekaboo = report.skills.find((s) => s.name === "peekaboo");
      if (!peekaboo) {
        // Skip if peekaboo not found
        return;
      }

      const output = formatSkillInfo(report, "peekaboo", {});
      expect(output).toContain("peekaboo");
      expect(output).toContain("Details:");
    });
  });
});