import { describe, expect, test } from "bun:test"
import { promises as fs } from "fs"
import path from "path"
import os from "os"
import { writeOpenCodeBundle } from "../src/targets/opencode"
import type { OpenCodeBundle } from "../src/types/opencode"

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

describe("writeOpenCodeBundle", () => {
  test("writes config, agents, plugins, and skills", async () => {
    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "opencode-test-"))
    const bundle: OpenCodeBundle = {
      config: { $schema: "https://opencode.ai/config.json" },
      agents: [{ name: "agent-one", content: "Agent content" }],
      plugins: [{ name: "hook.ts", content: "export {}" }],
      skillDirs: [
        {
          name: "skill-one",
          sourceDir: path.join(import.meta.dir, "fixtures", "sample-plugin", "skills", "skill-one"),
        },
      ],
    }

    await writeOpenCodeBundle(tempRoot, bundle)

    expect(await exists(path.join(tempRoot, "opencode.json"))).toBe(true)
    expect(await exists(path.join(tempRoot, ".opencode", "agents", "agent-one.md"))).toBe(true)
    expect(await exists(path.join(tempRoot, ".opencode", "plugins", "hook.ts"))).toBe(true)
    expect(await exists(path.join(tempRoot, ".opencode", "skills", "skill-one", "SKILL.md"))).toBe(true)
  })

  test("writes directly into a .opencode output root", async () => {
    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "opencode-root-"))
    const outputRoot = path.join(tempRoot, ".opencode")
    const bundle: OpenCodeBundle = {
      config: { $schema: "https://opencode.ai/config.json" },
      agents: [{ name: "agent-one", content: "Agent content" }],
      plugins: [],
      skillDirs: [
        {
          name: "skill-one",
          sourceDir: path.join(import.meta.dir, "fixtures", "sample-plugin", "skills", "skill-one"),
        },
      ],
    }

    await writeOpenCodeBundle(outputRoot, bundle)

    expect(await exists(path.join(outputRoot, "opencode.json"))).toBe(true)
    expect(await exists(path.join(outputRoot, "agents", "agent-one.md"))).toBe(true)
    expect(await exists(path.join(outputRoot, "skills", "skill-one", "SKILL.md"))).toBe(true)
    expect(await exists(path.join(outputRoot, ".opencode"))).toBe(false)
  })

  test("writes directly into ~/.config/opencode style output root", async () => {
    // Simulates the global install path: ~/.config/opencode
    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "config-opencode-"))
    const outputRoot = path.join(tempRoot, ".config", "opencode")
    const bundle: OpenCodeBundle = {
      config: { $schema: "https://opencode.ai/config.json" },
      agents: [{ name: "agent-one", content: "Agent content" }],
      plugins: [],
      skillDirs: [
        {
          name: "skill-one",
          sourceDir: path.join(import.meta.dir, "fixtures", "sample-plugin", "skills", "skill-one"),
        },
      ],
    }

    await writeOpenCodeBundle(outputRoot, bundle)

    // Should write directly, not nested under .opencode
    expect(await exists(path.join(outputRoot, "opencode.json"))).toBe(true)
    expect(await exists(path.join(outputRoot, "agents", "agent-one.md"))).toBe(true)
    expect(await exists(path.join(outputRoot, "skills", "skill-one", "SKILL.md"))).toBe(true)
    expect(await exists(path.join(outputRoot, ".opencode"))).toBe(false)
  })
})