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

import { Database } from "bun:sqlite"

import { mkdtemp, rm } from "node:fs/promises"

import { tmpdir } from "node:os"

import { join } from "node:path"

import { Effect } from "effect"

import type { PullRequestItem } from "../src/domain.ts"

import type { PullRequestLoad } from "../src/pullRequestLoad.ts"

import type { PullRequestView } from "../src/pullRequestViews.ts"

import { CacheService, pullRequestCacheKey } from "../src/services/CacheService.ts"

const tempDirs: string[] = []

afterEach(async () => {

await Promise.all(tempDirs.splice(0).map((path) => rm(path, { recursive: true, force: true })))

})

const tempCachePath = async () => {

const dir = await mkdtemp(join(tmpdir(), "ghui-cache-"))

tempDirs.push(dir)

return join(dir, "cache.sqlite")

}

const view: PullRequestView = { _tag: "Queue", mode: "authored", repository: null }

const pullRequest = (number: number, overrides: Partial<PullRequestItem> = {}): PullRequestItem => ({

repository: "owner/repo",

author: "author",

headRefOid: `sha-${number}`,

number,

title: `PR ${number}`,

body: "Body",

labels: [{ name: "bug", color: "#d73a4a" }],

additions: 10,

deletions: 2,

changedFiles: 3,

state: "open",

reviewStatus: "none",

checkStatus: "passing",

checkSummary: "1/1",

checks: [{ name: "ci", status: "completed", conclusion: "success" }],

autoMergeEnabled: false,

detailLoaded: true,

createdAt: new Date(`2026-01-${String(number).padStart(2, "0")}T00:00:00Z`),

closedAt: null,

url: `https://github.com/owner/repo/pull/${number}`,

...overrides,

})

const load = (data: readonly PullRequestItem[]): PullRequestLoad => ({

view,

data,

fetchedAt: new Date(),

endCursor: "cursor-1",

hasNextPage: true,

})

const runCache = async <A, E>(filename: string, effect: Effect.Effect<A, E, CacheService>) => Effect.runPromise(effect.pipe(Effect.provide(CacheService.layerSqliteFile(filename))))

describe("CacheService", () => {

test("persists queue order and revives dates", async () => {

const filename = await tempCachePath()

const first = pullRequest(1)

const second = pullRequest(2, { title: "Second" })

await runCache(

filename,

Effect.gen(function* () {

const cache = yield* CacheService

yield* cache.writeQueue("alice", load([second, first]))

}),

)

const cached = await runCache(

filename,

Effect.gen(function* () {

const cache = yield* CacheService

return yield* cache.readQueue("alice", view)

}),

)

expect(cached?.data.map((item) => item.number)).toEqual([2, 1])

expect(cached?.fetchedAt).toBeInstanceOf(Date)

expect(cached?.data[0]?.createdAt).toBeInstanceOf(Date)

expect(cached?.data[0]?.labels).toEqual([{ name: "bug", color: "#d73a4a" }])

expect(cached?.endCursor).toBe("cursor-1")

expect(cached?.hasNextPage).toBe(true)

})

test("scopes user queues by viewer", async () => {

const filename = await tempCachePath()

await runCache(

filename,

Effect.gen(function* () {

const cache = yield* CacheService

yield* cache.writeQueue("alice", load([pullRequest(1)]))

yield* cache.writeQueue("bob", load([pullRequest(2)]))

}),

)

const [alice, bob] = await runCache(

filename,

Effect.gen(function* () {

const cache = yield* CacheService

return yield* Effect.all([cache.readQueue("alice", view), cache.readQueue("bob", view)])

}),

)

expect(alice?.data.map((item) => item.number)).toEqual([1])

expect(bob?.data.map((item) => item.number)).toEqual([2])

})

test("reads hydrated pull request details by repository and number", async () => {

const filename = await tempCachePath()

const detail = pullRequest(3, { body: "Hydrated body", additions: 42 })

await runCache(

filename,

Effect.gen(function* () {

const cache = yield* CacheService

yield* cache.upsertPullRequest(detail)

}),

)

const cached = await runCache(

filename,

Effect.gen(function* () {

const cache = yield* CacheService

return yield* cache.readPullRequest({ repository: "owner/repo", number: 3 })

}),

)

expect(cached?.body).toBe("Hydrated body")

expect(cached?.additions).toBe(42)

expect(cached?.createdAt).toBeInstanceOf(Date)

})

test("queue summaries do not clobber hydrated details", async () => {

const filename = await tempCachePath()

const detail = pullRequest(4, { body: "Hydrated body", additions: 42, detailLoaded: true })

const summary = pullRequest(4, {

body: "",

labels: [],

additions: 0,

deletions: 0,

changedFiles: 0,

checkStatus: "failing",

checkSummary: "0/1",

detailLoaded: false,

})

await runCache(

filename,

Effect.gen(function* () {

const cache = yield* CacheService

yield* cache.upsertPullRequest(detail)

yield* cache.writeQueue("alice", load([summary]))

return yield* cache.readPullRequest({ repository: "owner/repo", number: 4 })

}),

).then((cached) => {

expect(cached).toMatchObject({

body: "Hydrated body",

additions: 42,

checkStatus: "failing",

checkSummary: "0/1",

detailLoaded: true,

})

})

})

test("skips corrupt pull request rows when reading queues", async () => {

const filename = await tempCachePath()

await runCache(

filename,

Effect.gen(function* () {

const cache = yield* CacheService

yield* cache.writeQueue("alice", load([pullRequest(1), pullRequest(2)]))

}),

)

const db = new Database(filename)

db.run("update pull_requests set data_json = ? where pr_key = ?", "{", pullRequestCacheKey({ repository: "owner/repo", number: 1 }))

db.close()

const cached = await runCache(

filename,

Effect.gen(function* () {

const cache = yield* CacheService

return yield* cache.readQueue("alice", view)

}),

)

expect(cached?.data.map((item) => item.number)).toEqual([2])

})

test("disabled layer is a no-op", async () => {

const cached = await Effect.runPromise(

Effect.gen(function* () {

const cache = yield* CacheService

yield* cache.writeQueue("alice", load([pullRequest(1)]))

return yield* cache.readQueue("alice", view)

}).pipe(Effect.provide(CacheService.disabledLayer)),

)

expect(cached).toBeNull()

})

test("layerFromPath falls back to disabled cache when startup fails", async () => {

const dir = await mkdtemp(join(tmpdir(), "ghui-cache-fallback-"))

tempDirs.push(dir)

const blockedParent = join(dir, "not-a-directory")

await Bun.write(blockedParent, "blocked")

const cached = await Effect.runPromise(

Effect.gen(function* () {

const cache = yield* CacheService

return yield* cache.readQueue("alice", view)

}).pipe(Effect.provide(CacheService.layerFromPath(join(blockedParent, "cache.sqlite")))),

)

expect(cached).toBeNull()

})

})