import { $ } from "bun"

import { describe, expect } from "bun:test"

import fs from "fs/promises"

import path from "path"

import { Effect } from "effect"

import { Git } from "../../src/git"

import { tmpdir } from "../fixture/fixture"

import { testEffect } from "../lib/effect"

const weird = process.platform === "win32" ? "space file.txt" : "tab\tfile.txt"

const it = testEffect(Git.defaultLayer)

const scopedTmpdir = (options?: Parameters<typeof tmpdir>[0]) =>

Effect.acquireRelease(

Effect.promise(() => tmpdir(options)),

(tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),

)

describe("Git", () => {

it.live("branch() returns current branch name", () =>

Effect.gen(function* () {

const tmp = yield* scopedTmpdir({ git: true })

const git = yield* Git.Service

const branch = yield* git.branch(tmp.path)

expect(branch).toBeDefined()

expect(typeof branch).toBe("string")

}),

)

it.live("branch() returns undefined for non-git directories", () =>

Effect.gen(function* () {

const tmp = yield* scopedTmpdir()

const git = yield* Git.Service

const branch = yield* git.branch(tmp.path)

expect(branch).toBeUndefined()

}),

)

it.live("branch() returns undefined for detached HEAD", () =>

Effect.gen(function* () {

const tmp = yield* scopedTmpdir({ git: true })

const hash = (yield* Effect.promise(() => $`git rev-parse HEAD`.cwd(tmp.path).quiet().text())).trim()

yield* Effect.promise(() => $`git checkout --detach ${hash}`.cwd(tmp.path).quiet())

const git = yield* Git.Service

const branch = yield* git.branch(tmp.path)

expect(branch).toBeUndefined()

}),

)

it.live("defaultBranch() uses init.defaultBranch when available", () =>

Effect.gen(function* () {

const tmp = yield* scopedTmpdir({ git: true })

yield* Effect.promise(() => $`git branch -M trunk`.cwd(tmp.path).quiet())

yield* Effect.promise(() => $`git config init.defaultBranch trunk`.cwd(tmp.path).quiet())

const git = yield* Git.Service

const branch = yield* git.defaultBranch(tmp.path)

expect(branch?.name).toBe("trunk")

expect(branch?.ref).toBe("trunk")

}),

)

it.live("status() handles special filenames", () =>

Effect.gen(function* () {

const tmp = yield* scopedTmpdir({ git: true })

yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, weird), "hello\n", "utf-8"))

const git = yield* Git.Service

const status = yield* git.status(tmp.path)

expect(status).toEqual(

expect.arrayContaining([

expect.objectContaining({

file: weird,

status: "added",

}),

]),

)

}),

)

it.live("diff(), stats(), and mergeBase() parse tracked changes", () =>

Effect.gen(function* () {

const tmp = yield* scopedTmpdir({ git: true })

yield* Effect.promise(() => $`git branch -M main`.cwd(tmp.path).quiet())

yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, weird), "before\n", "utf-8"))

yield* Effect.promise(() => $`git add .`.cwd(tmp.path).quiet())

yield* Effect.promise(() => $`git commit --no-gpg-sign -m "add file"`.cwd(tmp.path).quiet())

yield* Effect.promise(() => $`git checkout -b feature/test`.cwd(tmp.path).quiet())

yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, weird), "after\n", "utf-8"))

const git = yield* Git.Service

const [base, diff, stats] = yield* Effect.all([

git.mergeBase(tmp.path, "main"),

git.diff(tmp.path, "HEAD"),

git.stats(tmp.path, "HEAD"),

])

expect(base).toBeTruthy()

expect(diff).toEqual(

expect.arrayContaining([

expect.objectContaining({

file: weird,

status: "modified",

}),

]),

)

expect(stats).toEqual(

expect.arrayContaining([

expect.objectContaining({

file: weird,

additions: 1,

deletions: 1,

}),

]),

)

}),

)

it.live("patch() returns capped native patch output", () =>

Effect.gen(function* () {

const tmp = yield* scopedTmpdir({ git: true })

yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, weird), "before\n", "utf-8"))

yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, "other.txt"), "old\n", "utf-8"))

yield* Effect.promise(() => $`git add .`.cwd(tmp.path).quiet())

yield* Effect.promise(() => $`git commit --no-gpg-sign -m "add file"`.cwd(tmp.path).quiet())

yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, weird), "after\n", "utf-8"))

yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, "other.txt"), "new\n", "utf-8"))

const git = yield* Git.Service

const [patch, all, capped] = yield* Effect.all([

git.patch(tmp.path, "HEAD", weird, { context: 2_147_483_647 }),

git.patchAll(tmp.path, "HEAD", { context: 2_147_483_647 }),

git.patch(tmp.path, "HEAD", weird, { maxOutputBytes: 1 }),

])

expect(patch.truncated).toBe(false)

expect(patch.text).toContain("diff --git")

expect(patch.text).toContain("-before")

expect(patch.text).toContain("+after")

expect(all.truncated).toBe(false)

expect(all.text).toContain("diff --git")

expect(all.text).toContain("other.txt")

expect(all.text).toContain("+new")

expect(capped.truncated).toBe(true)

expect(capped.text).toBe("")

}),

)

it.live("patchUntracked() and statUntracked() handle added files", () =>

Effect.gen(function* () {

const tmp = yield* scopedTmpdir({ git: true })

yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, weird), "one\ntwo\n", "utf-8"))

const git = yield* Git.Service

const [patch, stat] = yield* Effect.all([

git.patchUntracked(tmp.path, weird, { context: 2_147_483_647 }),

git.statUntracked(tmp.path, weird),

])

expect(patch.truncated).toBe(false)

expect(patch.text).toContain("diff --git")

expect(patch.text).toContain("+one")

expect(patch.text).toContain("+two")

expect(stat).toEqual(expect.objectContaining({ file: weird, additions: 2, deletions: 0 }))

}),

)

it.live("show() returns empty text for binary blobs", () =>

Effect.gen(function* () {

const tmp = yield* scopedTmpdir({ git: true })

yield* Effect.promise(() => fs.writeFile(path.join(tmp.path, "bin.dat"), new Uint8Array([0, 1, 2, 3])))

yield* Effect.promise(() => $`git add .`.cwd(tmp.path).quiet())

yield* Effect.promise(() => $`git commit --no-gpg-sign -m "add binary"`.cwd(tmp.path).quiet())

const git = yield* Git.Service

const text = yield* git.show(tmp.path, "HEAD", "bin.dat")

expect(text).toBe("")

}),

)

})