import { describe, expect, test } from "bun:test"
import path from "path"
import { ReadTool } from "../../src/tool/read"
import { Instance } from "../../src/project/instance"
import { tmpdir } from "../fixture/fixture"
import { PermissionNext } from "../../src/permission/next"
import { Agent } from "../../src/agent/agent"

const ctx = {
  sessionID: "test",
  messageID: "",
  callID: "",
  agent: "build",
  abort: AbortSignal.any([]),
  metadata: () => {},
  ask: async () => {},
}

describe("tool.read external_directory permission", () => {
  test("allows reading absolute path inside project directory", async () => {
    await using tmp = await tmpdir({
      init: async (dir) => {
        await Bun.write(path.join(dir, "test.txt"), "hello world")
      },
    })
    await Instance.provide({
      directory: tmp.path,
      fn: async () => {
        const read = await ReadTool.init()
        const result = await read.execute({ filePath: path.join(tmp.path, "test.txt") }, ctx)
        expect(result.output).toContain("hello world")
      },
    })
  })

  test("allows reading file in subdirectory inside project directory", async () => {
    await using tmp = await tmpdir({
      init: async (dir) => {
        await Bun.write(path.join(dir, "subdir", "test.txt"), "nested content")
      },
    })
    await Instance.provide({
      directory: tmp.path,
      fn: async () => {
        const read = await ReadTool.init()
        const result = await read.execute({ filePath: path.join(tmp.path, "subdir", "test.txt") }, ctx)
        expect(result.output).toContain("nested content")
      },
    })
  })

  test("asks for external_directory permission when reading absolute path outside project", async () => {
    await using outerTmp = await tmpdir({
      init: async (dir) => {
        await Bun.write(path.join(dir, "secret.txt"), "secret data")
      },
    })
    await using tmp = await tmpdir({ git: true })
    await Instance.provide({
      directory: tmp.path,
      fn: async () => {
        const read = await ReadTool.init()
        const requests: Array<Omit<PermissionNext.Request, "id" | "sessionID" | "tool">> = []
        const testCtx = {
          ...ctx,
          ask: async (req: Omit<PermissionNext.Request, "id" | "sessionID" | "tool">) => {
            requests.push(req)
          },
        }
        await read.execute({ filePath: path.join(outerTmp.path, "secret.txt") }, testCtx)
        const extDirReq = requests.find((r) => r.permission === "external_directory")
        expect(extDirReq).toBeDefined()
        expect(extDirReq!.patterns.some((p) => p.includes(outerTmp.path))).toBe(true)
      },
    })
  })

  test("asks for external_directory permission when reading relative path outside project", async () => {
    await using tmp = await tmpdir({ git: true })
    await Instance.provide({
      directory: tmp.path,
      fn: async () => {
        const read = await ReadTool.init()
        const requests: Array<Omit<PermissionNext.Request, "id" | "sessionID" | "tool">> = []
        const testCtx = {
          ...ctx,
          ask: async (req: Omit<PermissionNext.Request, "id" | "sessionID" | "tool">) => {
            requests.push(req)
          },
        }
        // This will fail because file doesn't exist, but we can check if permission was asked
        await read.execute({ filePath: "../outside.txt" }, testCtx).catch(() => {})
        const extDirReq = requests.find((r) => r.permission === "external_directory")
        expect(extDirReq).toBeDefined()
      },
    })
  })

  test("does not ask for external_directory permission when reading inside project", async () => {
    await using tmp = await tmpdir({
      git: true,
      init: async (dir) => {
        await Bun.write(path.join(dir, "internal.txt"), "internal content")
      },
    })
    await Instance.provide({
      directory: tmp.path,
      fn: async () => {
        const read = await ReadTool.init()
        const requests: Array<Omit<PermissionNext.Request, "id" | "sessionID" | "tool">> = []
        const testCtx = {
          ...ctx,
          ask: async (req: Omit<PermissionNext.Request, "id" | "sessionID" | "tool">) => {
            requests.push(req)
          },
        }
        await read.execute({ filePath: path.join(tmp.path, "internal.txt") }, testCtx)
        const extDirReq = requests.find((r) => r.permission === "external_directory")
        expect(extDirReq).toBeUndefined()
      },
    })
  })
})

describe("tool.read env file blocking", () => {
  const cases: [string, boolean][] = [
    [".env", true],
    [".env.local", true],
    [".env.production", true],
    [".env.development.local", true],
    [".env.example", false],
    [".envrc", false],
    ["environment.ts", false],
  ]

  describe.each(["build", "plan"])("agent=%s", (agentName) => {
    test.each(cases)("%s blocked=%s", async (filename, blocked) => {
      await using tmp = await tmpdir({
        init: (dir) => Bun.write(path.join(dir, filename), "content"),
      })
      await Instance.provide({
        directory: tmp.path,
        fn: async () => {
          const agent = await Agent.get(agentName)
          const ctxWithPermissions = {
            ...ctx,
            ask: async (req: Omit<PermissionNext.Request, "id" | "sessionID" | "tool">) => {
              for (const pattern of req.patterns) {
                const rule = PermissionNext.evaluate(req.permission, pattern, agent.permission)
                if (rule.action === "deny") {
                  throw new PermissionNext.DeniedError(agent.permission)
                }
              }
            },
          }
          const read = await ReadTool.init()
          const promise = read.execute({ filePath: path.join(tmp.path, filename) }, ctxWithPermissions)
          if (blocked) {
            await expect(promise).rejects.toThrow(PermissionNext.DeniedError)
          } else {
            expect((await promise).output).toContain("content")
          }
        },
      })
    })
  })
})