import { describe, expect, test } from "bun:test"
import { promises as fs } from "fs"
import path from "path"
import os from "os"

async function exists(filePath: string): Promise<boolean> {
  try {
    await fs.access(filePath)
    return true
  } catch {
    return false
  }
}

async function runGit(args: string[], cwd: string, env?: NodeJS.ProcessEnv): Promise<void> {
  const proc = Bun.spawn(["git", ...args], {
    cwd,
    stdout: "pipe",
    stderr: "pipe",
    env: env ?? process.env,
  })
  const exitCode = await proc.exited
  const stderr = await new Response(proc.stderr).text()
  if (exitCode !== 0) {
    throw new Error(`git ${args.join(" ")} failed (exit ${exitCode}).\nstderr: ${stderr}`)
  }
 }

describe("CLI", () => {
  test("install converts fixture plugin to OpenCode output", async () => {
    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "cli-opencode-"))
    const fixtureRoot = path.join(import.meta.dir, "fixtures", "sample-plugin")

    const proc = Bun.spawn([
      "bun",
      "run",
      "src/index.ts",
      "install",
      fixtureRoot,
      "--to",
      "opencode",
      "--output",
      tempRoot,
    ], {
      cwd: path.join(import.meta.dir, ".."),
      stdout: "pipe",
      stderr: "pipe",
    })

    const exitCode = await proc.exited
    const stdout = await new Response(proc.stdout).text()
    const stderr = await new Response(proc.stderr).text()

    if (exitCode !== 0) {
      throw new Error(`CLI failed (exit ${exitCode}).\nstdout: ${stdout}\nstderr: ${stderr}`)
    }

    expect(stdout).toContain("Installed compound-engineering")
    expect(await exists(path.join(tempRoot, "opencode.json"))).toBe(true)
    expect(await exists(path.join(tempRoot, ".opencode", "agents", "repo-research-analyst.md"))).toBe(true)
    expect(await exists(path.join(tempRoot, ".opencode", "agents", "security-sentinel.md"))).toBe(true)
    expect(await exists(path.join(tempRoot, ".opencode", "skills", "skill-one", "SKILL.md"))).toBe(true)
    expect(await exists(path.join(tempRoot, ".opencode", "plugins", "converted-hooks.ts"))).toBe(true)
  })

  test("install defaults output to ~/.config/opencode", async () => {
    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "cli-local-default-"))
    const fixtureRoot = path.join(import.meta.dir, "fixtures", "sample-plugin")

    const repoRoot = path.join(import.meta.dir, "..")
    const proc = Bun.spawn([
      "bun",
      "run",
      path.join(repoRoot, "src", "index.ts"),
      "install",
      fixtureRoot,
      "--to",
      "opencode",
    ], {
      cwd: tempRoot,
      stdout: "pipe",
      stderr: "pipe",
      env: {
        ...process.env,
        HOME: tempRoot,
      },
    })

    const exitCode = await proc.exited
    const stdout = await new Response(proc.stdout).text()
    const stderr = await new Response(proc.stderr).text()

    if (exitCode !== 0) {
      throw new Error(`CLI failed (exit ${exitCode}).\nstdout: ${stdout}\nstderr: ${stderr}`)
    }

    expect(stdout).toContain("Installed compound-engineering")
    // OpenCode global config lives at ~/.config/opencode per XDG spec
    expect(await exists(path.join(tempRoot, ".config", "opencode", "opencode.json"))).toBe(true)
    expect(await exists(path.join(tempRoot, ".config", "opencode", "agents", "repo-research-analyst.md"))).toBe(true)
  })

  test("list returns plugins in a temp workspace", async () => {
    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "cli-list-"))
    const pluginsRoot = path.join(tempRoot, "plugins", "demo-plugin", ".claude-plugin")
    await fs.mkdir(pluginsRoot, { recursive: true })
    await fs.writeFile(path.join(pluginsRoot, "plugin.json"), "{\n  \"name\": \"demo-plugin\",\n  \"version\": \"1.0.0\"\n}\n")

    const repoRoot = path.join(import.meta.dir, "..")
    const proc = Bun.spawn(["bun", "run", path.join(repoRoot, "src", "index.ts"), "list"], {
      cwd: tempRoot,
      stdout: "pipe",
      stderr: "pipe",
    })

    const exitCode = await proc.exited
    const stdout = await new Response(proc.stdout).text()
    const stderr = await new Response(proc.stderr).text()

    if (exitCode !== 0) {
      throw new Error(`CLI failed (exit ${exitCode}).\nstdout: ${stdout}\nstderr: ${stderr}`)
    }

    expect(stdout).toContain("demo-plugin")
  })

  test("install pulls from GitHub when local path is missing", async () => {
    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "cli-github-install-"))
    const workspaceRoot = await fs.mkdtemp(path.join(os.tmpdir(), "cli-github-workspace-"))
    const repoRoot = await fs.mkdtemp(path.join(os.tmpdir(), "cli-github-repo-"))
    const fixtureRoot = path.join(import.meta.dir, "fixtures", "sample-plugin")
    const pluginRoot = path.join(repoRoot, "plugins", "compound-engineering")

    await fs.mkdir(path.dirname(pluginRoot), { recursive: true })
    await fs.cp(fixtureRoot, pluginRoot, { recursive: true })

    const gitEnv = {
      ...process.env,
      GIT_AUTHOR_NAME: "Test",
      GIT_AUTHOR_EMAIL: "test@example.com",
      GIT_COMMITTER_NAME: "Test",
      GIT_COMMITTER_EMAIL: "test@example.com",
    }

    await runGit(["init"], repoRoot, gitEnv)
    await runGit(["add", "."], repoRoot, gitEnv)
    await runGit(["commit", "-m", "fixture"], repoRoot, gitEnv)

    const projectRoot = path.join(import.meta.dir, "..")
    const proc = Bun.spawn([
      "bun",
      "run",
      path.join(projectRoot, "src", "index.ts"),
      "install",
      "compound-engineering",
      "--to",
      "opencode",
    ], {
      cwd: workspaceRoot,
      stdout: "pipe",
      stderr: "pipe",
      env: {
        ...process.env,
        HOME: tempRoot,
        COMPOUND_PLUGIN_GITHUB_SOURCE: repoRoot,
      },
    })

    const exitCode = await proc.exited
    const stdout = await new Response(proc.stdout).text()
    const stderr = await new Response(proc.stderr).text()

    if (exitCode !== 0) {
      throw new Error(`CLI failed (exit ${exitCode}).\nstdout: ${stdout}\nstderr: ${stderr}`)
    }

    expect(stdout).toContain("Installed compound-engineering")
    // OpenCode global config lives at ~/.config/opencode per XDG spec
    expect(await exists(path.join(tempRoot, ".config", "opencode", "opencode.json"))).toBe(true)
    expect(await exists(path.join(tempRoot, ".config", "opencode", "agents", "repo-research-analyst.md"))).toBe(true)
  })

  test("convert writes OpenCode output", async () => {
    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "cli-convert-"))
    const fixtureRoot = path.join(import.meta.dir, "fixtures", "sample-plugin")

    const proc = Bun.spawn([
      "bun",
      "run",
      "src/index.ts",
      "convert",
      fixtureRoot,
      "--to",
      "opencode",
      "--output",
      tempRoot,
    ], {
      cwd: path.join(import.meta.dir, ".."),
      stdout: "pipe",
      stderr: "pipe",
    })

    const exitCode = await proc.exited
    const stdout = await new Response(proc.stdout).text()
    const stderr = await new Response(proc.stderr).text()

    if (exitCode !== 0) {
      throw new Error(`CLI failed (exit ${exitCode}).\nstdout: ${stdout}\nstderr: ${stderr}`)
    }

    expect(stdout).toContain("Converted compound-engineering")
    expect(await exists(path.join(tempRoot, "opencode.json"))).toBe(true)
  })

  test("convert supports --codex-home for codex output", async () => {
    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "cli-codex-home-"))
    const codexRoot = path.join(tempRoot, ".codex")
    const fixtureRoot = path.join(import.meta.dir, "fixtures", "sample-plugin")

    const proc = Bun.spawn([
      "bun",
      "run",
      "src/index.ts",
      "convert",
      fixtureRoot,
      "--to",
      "codex",
      "--codex-home",
      codexRoot,
    ], {
      cwd: path.join(import.meta.dir, ".."),
      stdout: "pipe",
      stderr: "pipe",
    })

    const exitCode = await proc.exited
    const stdout = await new Response(proc.stdout).text()
    const stderr = await new Response(proc.stderr).text()

    if (exitCode !== 0) {
      throw new Error(`CLI failed (exit ${exitCode}).\nstdout: ${stdout}\nstderr: ${stderr}`)
    }

    expect(stdout).toContain("Converted compound-engineering")
    expect(stdout).toContain(codexRoot)
    expect(await exists(path.join(codexRoot, "prompts", "workflows-review.md"))).toBe(true)
    expect(await exists(path.join(codexRoot, "skills", "workflows-review", "SKILL.md"))).toBe(true)
    expect(await exists(path.join(codexRoot, "AGENTS.md"))).toBe(true)
  })

  test("install supports --also with codex output", async () => {
    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "cli-also-"))
    const fixtureRoot = path.join(import.meta.dir, "fixtures", "sample-plugin")
    const codexRoot = path.join(tempRoot, ".codex")

    const proc = Bun.spawn([
      "bun",
      "run",
      "src/index.ts",
      "install",
      fixtureRoot,
      "--to",
      "opencode",
      "--also",
      "codex",
      "--codex-home",
      codexRoot,
      "--output",
      tempRoot,
    ], {
      cwd: path.join(import.meta.dir, ".."),
      stdout: "pipe",
      stderr: "pipe",
    })

    const exitCode = await proc.exited
    const stdout = await new Response(proc.stdout).text()
    const stderr = await new Response(proc.stderr).text()

    if (exitCode !== 0) {
      throw new Error(`CLI failed (exit ${exitCode}).\nstdout: ${stdout}\nstderr: ${stderr}`)
    }

    expect(stdout).toContain("Installed compound-engineering")
    expect(stdout).toContain(codexRoot)
    expect(await exists(path.join(codexRoot, "prompts", "workflows-review.md"))).toBe(true)
    expect(await exists(path.join(codexRoot, "skills", "workflows-review", "SKILL.md"))).toBe(true)
    expect(await exists(path.join(codexRoot, "skills", "skill-one", "SKILL.md"))).toBe(true)
    expect(await exists(path.join(codexRoot, "AGENTS.md"))).toBe(true)
  })
})