import { describe, expect, test } from "bun:test"
import { $ } from "bun"
import { fileURLToPath } from "url"
import path from "path"
import { SqliteClient } from "@effect/sql-sqlite-bun"
import { EffectDrizzleSqlite } from "@opencode-ai/effect-drizzle-sqlite"
import { Effect, Layer } from "effect"
import { sql } from "drizzle-orm"
import { DatabaseMigration } from "@opencode-ai/core/database/migration"
import { migrations } from "@opencode-ai/core/database/migration.gen"
import { Database } from "@opencode-ai/core/database/database"
import { tmpdir } from "./fixture/tmpdir"
import type { SqlClient } from "effect/unstable/sql/SqlClient"
import { importLegacyCredentials } from "@opencode-ai/core/database/migration/20260805200742_import_legacy_credentials"

const run = <A, E>(effect: Effect.Effect<A, E, SqlClient>) =>
  Effect.runPromise(
    effect.pipe(Effect.provide(SqliteClient.layer({ filename: ":memory:", disableWAL: true })), Effect.scoped),
  )

const makeDb = EffectDrizzleSqlite.makeWithDefaults()

describe("DatabaseMigration", () => {
  test("serializes concurrent embedded initialization for one database path", async () => {
    await using tmp = await tmpdir()
    const filename = path.join(tmp.path, "embedded.sqlite")

    await Effect.runPromise(
      Effect.all(
        [Database.layer({ path: filename }), Database.layer({ path: filename })].map((layer) =>
          Effect.scoped(Layer.build(layer)),
        ),
        { concurrency: "unbounded" },
      ),
    )
  })

  if (process.platform === "linux") {
    test("declared schema has no ungenerated migrations", async () => {
      const result = await $`bun ${fileURLToPath(new URL("../script/migration.ts", import.meta.url))} --check`
        .quiet()
        .nothrow()
      expect(result.exitCode, result.stderr.toString()).toBe(0)
      expect(result.stdout.toString()).toContain("No schema changes, nothing to migrate")
    }, 30_000)
  }

  test("bootstraps the current schema and records the migration registry", async () => {
    await run(
      Effect.gen(function* () {
        const db = yield* makeDb
        yield* DatabaseMigration.apply(db)

        expect(yield* db.get(sql`SELECT name FROM sqlite_master WHERE type = 'table' AND name = 'session_v2'`)).toEqual(
          {
            name: "session_v2",
          },
        )
        expect(
          yield* db.get(sql`SELECT name FROM sqlite_master WHERE type = 'table' AND name = 'session_pending'`),
        ).toEqual({ name: "session_pending" })
        expect(yield* db.get(sql`SELECT count(*) AS count FROM migration`)).toEqual({ count: migrations.length })
      }),
    )
  })

  test("rejects a non-empty database without a session table", async () => {
    await expect(
      run(
        Effect.gen(function* () {
          const db = yield* makeDb
          yield* db.run(sql`CREATE TABLE unrelated (id text PRIMARY KEY)`)
          yield* DatabaseMigration.apply(db)
        }),
      ),
    ).rejects.toThrow("Database is not empty and has no session table")
  })

  test("applies generic migrations once and records their order", async () => {
    await run(
      Effect.gen(function* () {
        const db = yield* makeDb
        yield* db.run(sql`CREATE TABLE session (id text PRIMARY KEY)`)
        const input = [
          {
            id: "first",
            up: (tx: Parameters<Parameters<typeof db.transaction>[0]>[0]) =>
              tx.run(sql`CREATE TABLE applied (id text PRIMARY KEY)`),
          },
          {
            id: "second",
            up: (tx: Parameters<Parameters<typeof db.transaction>[0]>[0]) =>
              tx.run(sql`INSERT INTO applied (id) VALUES ('second')`),
          },
        ]

        yield* DatabaseMigration.applyOnly(db, input)
        yield* DatabaseMigration.applyOnly(db, input)

        expect(yield* db.all(sql`SELECT id FROM applied`)).toEqual([{ id: "second" }])
        expect(yield* db.all(sql`SELECT id FROM migration ORDER BY time_completed, id`)).toEqual([
          { id: "first" },
          { id: "second" },
        ])
      }),
    )
  })

  test("imports legacy JSON credentials without changing the source file or existing credentials", async () => {
    await using tmp = await tmpdir()
    const source = path.join(tmp.path, "auth.json")
    const content = JSON.stringify({
      openai: { type: "oauth", refresh: "refresh", access: "access", expires: 123, accountId: "account" },
      anthropic: { type: "api", key: "legacy-key", metadata: { region: "us" } },
      "https://example.com/": { type: "wellknown", key: "TOKEN", token: "wellknown-key" },
      invalid: { type: "unknown" },
    })
    await Bun.write(source, content)

    await run(
      Effect.gen(function* () {
        const db = yield* makeDb
        yield* DatabaseMigration.apply(db)
        const now = Date.now()
        yield* db.run(sql`
          INSERT INTO credential (id, integration_id, label, value, time_created, time_updated)
          VALUES ('existing', 'anthropic', 'Existing', ${JSON.stringify({ type: "key", key: "current-key" })}, ${now}, ${now})
        `)

        yield* db.transaction((tx) => importLegacyCredentials(tx, source))

        expect(yield* db.all(sql`SELECT integration_id, label, value FROM credential ORDER BY integration_id`)).toEqual(
          [
            {
              integration_id: "anthropic",
              label: "Existing",
              value: JSON.stringify({ type: "key", key: "current-key" }),
            },
            {
              integration_id: "https://example.com",
              label: "default",
              value: JSON.stringify({ type: "key", key: "wellknown-key" }),
            },
            {
              integration_id: "openai",
              label: "default",
              value: JSON.stringify({
                type: "oauth",
                methodID: "chatgpt-browser",
                refresh: "refresh",
                access: "access",
                expires: 123,
                metadata: { accountID: "account" },
              }),
            },
          ],
        )
        expect(yield* db.get(sql`SELECT value FROM kv WHERE key = 'wellknown:sources'`)).toEqual({
          value: JSON.stringify(["https://example.com"]),
        })
      }),
    )

    expect(await Bun.file(source).text()).toBe(content)
  })

  test("rolls back a failed migration without recording it", async () => {
    await run(
      Effect.gen(function* () {
        const db = yield* makeDb
        yield* db.run(sql`CREATE TABLE session (id text PRIMARY KEY)`)
        const migration = {
          id: "failing",
          up: (tx: Parameters<Parameters<typeof db.transaction>[0]>[0]) =>
            Effect.gen(function* () {
              yield* tx.run(sql`CREATE TABLE rolled_back (id text PRIMARY KEY)`)
              yield* Effect.fail(new Error("stop"))
            }),
        }

        expect((yield* Effect.exit(DatabaseMigration.applyOnly(db, [migration])))._tag).toBe("Failure")
        expect(
          yield* db.get(sql`SELECT name FROM sqlite_master WHERE type = 'table' AND name = 'rolled_back'`),
        ).toBeUndefined()
        expect(yield* db.get(sql`SELECT id FROM migration WHERE id = 'failing'`)).toBeUndefined()
      }),
    )
  })

  test("suspends foreign keys outside migrations that rebuild referenced tables", async () => {
    await run(
      Effect.gen(function* () {
        const db = yield* makeDb
        yield* db.run(sql`PRAGMA foreign_keys = ON`)
        yield* db.run(sql`CREATE TABLE session (id text PRIMARY KEY, title text NOT NULL)`)
        yield* db.run(
          sql`CREATE TABLE message (id text PRIMARY KEY, session_id text NOT NULL REFERENCES session(id) ON DELETE CASCADE)`,
        )
        yield* db.run(sql`INSERT INTO session VALUES ('session', 'title')`)
        yield* db.run(sql`INSERT INTO message VALUES ('message', 'session')`)

        yield* DatabaseMigration.applyOnly(db, [
          {
            id: "rebuild",
            foreignKeys: false,
            up: (tx) =>
              Effect.gen(function* () {
                yield* tx.run(sql`CREATE TABLE next_session (id text PRIMARY KEY, title text)`)
                yield* tx.run(sql`INSERT INTO next_session SELECT * FROM session`)
                yield* tx.run(sql`DROP TABLE session`)
                yield* tx.run(sql`ALTER TABLE next_session RENAME TO session`)
              }),
          },
        ])

        expect(yield* db.get(sql`SELECT id FROM message`)).toEqual({ id: "message" })
        expect(yield* db.get<{ foreign_keys: number }>(sql`PRAGMA foreign_keys`)).toEqual({ foreign_keys: 1 })
      }),
    )
  })

  test("imports an existing Drizzle migration journal once", async () => {
    await run(
      Effect.gen(function* () {
        const db = yield* makeDb
        yield* db.run(
          sql`CREATE TABLE __drizzle_migrations (id INTEGER PRIMARY KEY, hash text NOT NULL, created_at numeric, name text, applied_at TEXT)`,
        )
        yield* db.run(sql`
          INSERT INTO __drizzle_migrations (hash, created_at, name, applied_at)
          VALUES ('hash', 1, 'legacy', ${new Date().toISOString()})
        `)

        yield* DatabaseMigration.applyOnly(db, [])
        expect(yield* db.all(sql`SELECT id FROM migration`)).toEqual([{ id: "legacy" }])

        yield* db.run(sql`INSERT INTO migration (id, time_completed) VALUES ('existing', 1)`)
        yield* db.run(sql`UPDATE __drizzle_migrations SET name = 'ignored'`)
        yield* DatabaseMigration.applyOnly(db, [])
        expect(yield* db.all(sql`SELECT id FROM migration ORDER BY id`)).toEqual([{ id: "existing" }, { id: "legacy" }])
      }),
    )
  })
})