"""HTTP app for the full-flow E2E (served as langgraph dev's http.app).

Mounts, on top of the REAL ``agent.webapp`` app:
  - fake GitHub REST API  (/fake-gh/...)   the real open_pull_request hits this
  - fake Slack API         (/fake-slack/...) the real slack code hits this
  - mock UIs               (/mock/slack, /mock/github) what the user/Playwright sees
  - control + compose      (/control/*, /mock/slack/send) the test driver

Nothing here touches agent logic — it only stands in for the SaaS boundaries
and renders their state back as a user-facing UI.
"""

from __future__ import annotations

import hashlib
import hmac
import json
import os
import sys
import time
from html import escape
from pathlib import Path
from typing import Any
from urllib.parse import quote

sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))

import e2e_env  # noqa: E402
import patches  # noqa: E402

patches.apply()

import fakes  # noqa: E402
import httpx  # noqa: E402
from e2e_env import (  # noqa: E402
    BASE_URL,
    BOT_USER_ID,
    DEMO_CHANNEL,
    HUMAN_USER,
    REPO_ROOT,
    TEST_USERS,
)
from fastapi import HTTPException, Request  # noqa: E402
from fastapi.responses import (  # noqa: E402
    FileResponse,
    HTMLResponse,
    JSONResponse,
    RedirectResponse,
    Response,
)

# Slack-user directory the fake ``users.info`` resolves: the default sender used
# by the automated tests plus the named manual-test users.
_SLACK_USERS: dict[str, dict[str, str]] = {
    HUMAN_USER: {"name": "devuser", "real_name": "Dev User", "email": "dev@example.com"},
    **{
        u["slack_id"]: {"name": u["login"], "real_name": u["name"], "email": u["email"]}
        for u in TEST_USERS
    },
}

from agent.dashboard.oauth import COOKIE_NAME, issue_session  # noqa: E402
from agent.webapp import app, generate_thread_id_from_slack_thread  # noqa: E402

GITHUB_WEBHOOK_SECRET = os.environ["GITHUB_WEBHOOK_SECRET"]
SLACK_SIGNING_SECRET = os.environ["SLACK_SIGNING_SECRET"]
STATIC_DIR = Path(__file__).parent / "static"

CURRENT_THREAD: dict[str, str | None] = {"channel": DEMO_CHANNEL, "thread_ts": None}

fakes.seed_bare_remote()


# --- control + Slack compose (the test driver) -----------------------------
@app.post("/control/reset")
async def control_reset() -> JSONResponse:
    fakes.reset()
    CURRENT_THREAD["thread_ts"] = None
    return JSONResponse({"ok": True})


@app.get("/control/state")
async def control_state() -> JSONResponse:
    return JSONResponse(
        {"channel": CURRENT_THREAD["channel"], "thread_ts": CURRENT_THREAD["thread_ts"]}
    )


@app.post("/mock/slack/send")
async def slack_send(request: Request) -> JSONResponse:
    """Simulate a user posting in Slack: store the message, then deliver the
    signed Events-API webhook to the real /webhooks/slack route."""
    form = await request.json()
    text = str(form.get("text", ""))
    mention_bot = bool(form.get("mention_bot", True))
    # Sender defaults to the first test user (Alice) — the canonical owner the
    # automated tests log in as; the mock UI passes the chosen test user.
    user_id = str(form.get("user") or TEST_USERS[0]["slack_id"])
    channel = DEMO_CHANNEL

    ts = fakes.new_thread_ts()
    CURRENT_THREAD["thread_ts"] = ts
    fakes.add_slack_message(channel, ts, user=user_id, text=text, is_bot=False)

    payload = {
        "type": "event_callback",
        "event_id": f"Ev{ts}",
        "authorizations": [{"user_id": BOT_USER_ID}],
        "event": {
            "type": "app_mention" if mention_bot else "message",
            "channel": channel,
            "user": user_id,
            "text": text,
            "ts": ts,
            "thread_ts": ts,
        },
    }
    raw = json.dumps(payload).encode()
    req_ts = str(int(time.time()))
    base = f"v0:{req_ts}:{raw.decode()}".encode()
    sig = "v0=" + hmac.new(SLACK_SIGNING_SECRET.encode(), base, hashlib.sha256).hexdigest()

    transport = httpx.ASGITransport(app=app)
    async with httpx.AsyncClient(transport=transport, base_url="http://harness") as client:
        resp = await client.post(
            "/webhooks/slack",
            content=raw,
            headers={
                "X-Slack-Signature": sig,
                "X-Slack-Request-Timestamp": req_ts,
                "Content-Type": "application/json",
            },
        )
    return JSONResponse(
        {
            "thread_ts": ts,
            "thread_id": generate_thread_id_from_slack_thread(channel, ts),
            "webhook_status": resp.status_code,
            "webhook": resp.json(),
        }
    )


@app.post("/control/login")
async def control_login(request: Request) -> JSONResponse:
    """Simulate a signed-in dashboard user by minting the real session cookie."""
    form = await request.json()
    login = str(form.get("login", "dev-user"))
    email = str(form.get("email", "dev@example.com"))
    token = issue_session(login=login, email=email, avatar_url=None)
    resp = JSONResponse({"ok": True, "login": login, "email": email})
    resp.set_cookie(COOKIE_NAME, token, httponly=True, samesite="lax", secure=False, path="/")
    return resp


@app.get("/control/login")
async def control_login_get(login: str = "", email: str = "", next_url: str = "") -> Response:
    """Browser login. With no ``login``, render a dropdown of the test users;
    with ``?login=<u>`` (email resolved from the registry, or pass ``&email=``),
    mint the session cookie and redirect into the dashboard. Use a separate
    browser/profile per user — each has its own cookie jar."""
    # Land on the dashboard origin (DASHBOARD_BASE_URL — the Vite HMR server in
    # dev:mock), not this harness, so the cookie + the hot-reloading UI line up.
    ui = os.environ.get("DASHBOARD_BASE_URL", "").rstrip("/")
    dest = next_url or (f"{ui}/agents" if ui else "/agents")
    if not login:
        options = "".join(f'<option value="{u["login"]}">{u["name"]}</option>' for u in TEST_USERS)
        return HTMLResponse(
            f"""<!doctype html><meta charset=utf-8><title>Mock login</title>
            <body style="font-family:system-ui;max-width:420px;margin:3rem auto;padding:0 1rem">
            <h1 style="font-size:1.1rem">Sign in (mock)</h1>
            <form method=get action=/control/login>
              <select name=login style="font:inherit;padding:0.4rem">{options}</select>
              <button style="font:inherit;padding:0.45rem 0.9rem;cursor:pointer">Sign in</button>
            </form>
            <p style="color:#888;font-size:0.85rem">Tip: use a separate browser or profile per
            user so their sessions don't overwrite each other.</p>
            </body>"""
        )
    if not email:
        match = next((u for u in TEST_USERS if u["login"] == login), None)
        email = match["email"] if match else f"{login}@example.com"
    token = issue_session(login=login, email=email, avatar_url=None)
    resp = RedirectResponse(url=dest, status_code=303)
    resp.set_cookie(COOKIE_NAME, token, httponly=True, samesite="lax", secure=False, path="/")
    return resp


@app.get("/dashboard/api/auth/login")
async def mock_github_login(redirect_to: str = "") -> Response:
    """E2E stand-in for the dashboard OAuth start route.

    The real route would redirect to github.com. Keep the dashboard-facing URL
    intact, then hand off to the fake GitHub simulator so Playwright exercises a
    browser login flow instead of test code pre-minting a session cookie.
    """
    ui = os.environ.get("DASHBOARD_BASE_URL", "").rstrip("/")
    dest = redirect_to or (f"{ui}/agents" if ui else "/agents")
    return RedirectResponse(f"/fake-gh/login/oauth/authorize?redirect_to={quote(dest)}", 302)


@app.get("/fake-gh/login/oauth/authorize")
async def fake_github_authorize(redirect_to: str = "", login: str = "") -> Response:
    """Fake GitHub OAuth consent/login page for dashboard e2e tests."""
    ui = os.environ.get("DASHBOARD_BASE_URL", "").rstrip("/")
    dest = redirect_to or (f"{ui}/agents" if ui else "/agents")
    if not login:
        options = "".join(
            f'<option value="{escape(u["login"], quote=True)}">'
            f"{escape(u['name'])} (@{escape(u['login'])})</option>"
            for u in TEST_USERS
        )
        return HTMLResponse(
            f"""<!doctype html><meta charset=utf-8><title>GitHub · Authorize open-swe</title>
            <body style="font-family:system-ui;max-width:420px;margin:3rem auto;padding:0 1rem">
            <main data-testid="fake-github-login">
              <h1 style="font-size:1.1rem">Authorize open-swe</h1>
              <p style="color:#888;font-size:0.9rem">Pick a fake GitHub account to continue.</p>
              <form method=get action=/fake-gh/login/oauth/authorize>
                <input type=hidden name=redirect_to value="{escape(dest, quote=True)}">
                <label>GitHub user
                  <select name=login style="font:inherit;padding:0.4rem">{options}</select>
                </label>
                <button style="font:inherit;padding:0.45rem 0.9rem;cursor:pointer">Authorize open-swe</button>
              </form>
            </main>
            </body>"""
        )
    match = next((u for u in TEST_USERS if u["login"] == login), None)
    email = match["email"] if match else f"{login}@example.com"
    token = issue_session(login=login, email=email, avatar_url=None)
    resp = RedirectResponse(url=dest, status_code=303)
    resp.set_cookie(COOKIE_NAME, token, httponly=True, samesite="lax", secure=False, path="/")
    return resp


# The real dashboard registered /dashboard/api/auth/login first (via
# include_router), so Starlette would match it before ours. Move ours to the
# front of the table so the mock picker shadows the real OAuth redirect.
for _i, _route in enumerate(app.router.routes):
    if getattr(_route, "endpoint", None) is mock_github_login:
        app.router.routes.insert(0, app.router.routes.pop(_i))
        break


@app.post("/control/logout")
async def control_logout() -> JSONResponse:
    resp = JSONResponse({"ok": True})
    resp.delete_cookie(COOKIE_NAME, path="/")
    return resp


# --- serve the REAL built ui/ SPA, same-origin so the session cookie works ----
# The "Open in Web" link (DASHBOARD_BASE_URL/agents/{id}) lands on the real app;
# it calls /dashboard/api/* (same origin) and streams via the dashboard proxy.
UI_PUBLIC = REPO_ROOT / "ui" / ".output" / "public"
_ASSETS_ROOT = (UI_PUBLIC / "assets").resolve()


def _ui_file(name: str) -> FileResponse:
    path = UI_PUBLIC / name
    if not path.is_file():
        raise HTTPException(404, f"{name} not built — run `bun run build` in ui/")
    return FileResponse(path)


@app.get("/assets/{asset_path:path}")
async def ui_asset(asset_path: str) -> FileResponse:
    # Explicit route, not app.mount(StaticFiles): LangGraph's custom-app loader
    # serves APIRoutes but drops sub-app Mounts, so a mount 404s under it.
    target = (_ASSETS_ROOT / asset_path).resolve()
    if not str(target).startswith(str(_ASSETS_ROOT)) or not target.is_file():
        raise HTTPException(404, "asset not found")
    return FileResponse(target)


@app.get("/_shell.html", response_class=HTMLResponse)
async def ui_shell() -> FileResponse:
    return _ui_file("_shell.html")


@app.get("/manifest.webmanifest")
async def ui_manifest() -> FileResponse:
    return _ui_file("manifest.webmanifest")


@app.get("/favicon.png")
async def ui_favicon() -> FileResponse:
    return _ui_file("favicon.png")


@app.get("/apple-touch-icon.png")
async def ui_apple_icon() -> FileResponse:
    return _ui_file("apple-touch-icon.png")


@app.get("/logo-mark.png")
async def ui_logo_mark() -> FileResponse:
    return _ui_file("logo-mark.png")


# Client routes used by the handoff tests: serve the SPA shell; the client
# router boots at the current URL. Kept explicit (no catch-all) so LangGraph's
# own root routes — which the dashboard proxy calls server-side — are untouched.
@app.get("/agents/{thread_id}", response_class=HTMLResponse)
async def ui_agents_thread(thread_id: str) -> FileResponse:  # noqa: ARG001
    return _ui_file("_shell.html")


@app.get("/agents/{thread_id}/plan", response_class=HTMLResponse)
async def ui_agents_plan(thread_id: str) -> FileResponse:  # noqa: ARG001
    return _ui_file("_shell.html")


@app.get("/login", response_class=HTMLResponse)
async def ui_login() -> FileResponse:
    return _ui_file("_shell.html")


@app.get("/mock/users")
async def mock_users() -> JSONResponse:
    """The named test users that drive the Slack sender + login dropdowns."""
    return JSONResponse(TEST_USERS)


@app.get("/mock/slack/messages")
async def slack_messages() -> JSONResponse:
    msgs = fakes.slack_messages(CURRENT_THREAD["channel"])
    return JSONResponse(
        [
            {
                "user": m["user"],
                "text": m["text"],
                "is_bot": m["is_bot"],
                "ts": m["ts"],
                "thread_ts": m["thread_ts"],
            }
            for m in msgs
        ]
    )


# --- mock UIs --------------------------------------------------------------
@app.get("/mock/slack", response_class=HTMLResponse)
async def mock_slack_page() -> str:
    return (STATIC_DIR / "slack.html").read_text()


@app.get("/mock/github", response_class=HTMLResponse)
async def mock_github_page() -> str:
    return (STATIC_DIR / "github.html").read_text()


def _pr_html_url(pr: dict[str, Any]) -> str:
    return f"{BASE_URL}/mock/github/{pr['owner']}/{pr['repo']}/pull/{pr['number']}"


@app.get("/mock/github/data")
async def mock_github_data() -> JSONResponse:
    return JSONResponse(
        [
            {
                "number": p["number"],
                "title": p["title"],
                "head": p["head"],
                "base": p["base"],
                "state": p["state"],
                "draft": p["draft"],
                "author": p["author"],
                "body": p["body"],
                "files": p["files"],
                "url": _pr_html_url(p),
            }
            for p in fakes.PULLS
        ]
    )


@app.get("/mock/github/{owner}/{repo}/pull/{number}", response_class=HTMLResponse)
async def mock_github_pr(owner: str, repo: str, number: int) -> HTMLResponse:  # noqa: ARG001
    pr = fakes.find_pull(number)
    if pr is None:
        return HTMLResponse(f"<h1>PR #{number} not found</h1>", status_code=404)
    files = "".join(
        f'<li data-file="{f["filename"]}">{f["filename"]} '
        f"<span class='stat'>+{f['additions']} −{f['deletions']}</span></li>"
        for f in pr["files"]
    )
    draft = " (draft)" if pr["draft"] else ""
    return HTMLResponse(
        f"""<!doctype html><meta charset=utf-8>
        <title>PR #{pr["number"]} — {pr["owner"]}/{pr["repo"]}</title>
        <body style="font-family:system-ui;max-width:720px;margin:2rem auto">
        <p><a href="/mock/github">← all pull requests</a></p>
        <h1 id="pr-title">{pr["title"]}{draft}</h1>
        <p>#{pr["number"]} · <span id="pr-state">{pr["state"]}</span> ·
           <code id="pr-head">{pr["head"]}</code> → <code>{pr["base"]}</code> ·
           by <span id="pr-author">{pr["author"]}</span></p>
        <h3>Description</h3><pre id="pr-body">{pr["body"]}</pre>
        <h3>Files changed ({len(pr["files"])})</h3>
        <ul id="pr-files">{files}</ul>
        </body>"""
    )


# --- fake GitHub REST API (open_pull_request hits this) --------------------
def _gh_pr_json(pr: dict[str, Any]) -> dict[str, Any]:
    return {
        "number": pr["number"],
        "html_url": _pr_html_url(pr),
        "state": pr["state"],
        "draft": pr["draft"],
        "merged": pr["merged"],
        "title": pr["title"],
        "body": pr["body"],
        "user": {"login": pr["author"]},
        "head": {"ref": pr["head"]},
        "base": {"ref": pr["base"]},
        "additions": pr["additions"],
        "deletions": pr["deletions"],
        "changed_files": len(pr["files"]),
    }


@app.get("/fake-gh/repos/{owner}/{repo}")
async def gh_get_repo(owner: str, repo: str) -> JSONResponse:
    return JSONResponse({"full_name": f"{owner}/{repo}", "private": False})


@app.get("/fake-gh/repos/{owner}/{repo}/pulls")
async def gh_list_pulls(owner: str, repo: str) -> JSONResponse:  # noqa: ARG001
    return JSONResponse([])


@app.post("/fake-gh/repos/{owner}/{repo}/pulls")
async def gh_create_pull(owner: str, repo: str, request: Request) -> JSONResponse:
    body = await request.json()
    pr = fakes.create_pull(
        owner,
        repo,
        head=body.get("head", ""),
        base=body.get("base", "main"),
        title=body.get("title", ""),
        body=body.get("body", ""),
        draft=bool(body.get("draft", True)),
    )
    return JSONResponse(_gh_pr_json(pr), status_code=201)


@app.get("/fake-gh/repos/{owner}/{repo}/pulls/{number}")
async def gh_get_pull(owner: str, repo: str, number: int) -> JSONResponse:  # noqa: ARG001
    pr = fakes.find_pull(number)
    if pr is None:
        return JSONResponse({"message": "Not Found"}, status_code=404)
    return JSONResponse(_gh_pr_json(pr))


# --- fake Slack API (real slack code hits this) ----------------------------
def _ok(extra: dict[str, Any] | None = None) -> JSONResponse:
    return JSONResponse({"ok": True, **(extra or {})})


@app.post("/fake-slack/chat.postMessage")
async def slack_post_message(request: Request) -> JSONResponse:
    body = await request.json()
    ts = fakes.add_slack_message(
        body.get("channel", ""),
        body.get("thread_ts", ""),
        user=BOT_USER_ID,
        text=body.get("text", ""),
        blocks=body.get("blocks"),
        is_bot=True,
    )
    return _ok({"ts": ts, "message": {"ts": ts}})


@app.post("/fake-slack/chat.postEphemeral")
async def slack_post_ephemeral(request: Request) -> JSONResponse:
    await request.body()
    return _ok({"message_ts": fakes.next_slack_ts()})


@app.post("/fake-slack/assistant.threads.setStatus")
async def slack_set_status(request: Request) -> JSONResponse:
    await request.body()
    return _ok()


@app.post("/fake-slack/reactions.add")
async def slack_reactions_add(request: Request) -> JSONResponse:
    await request.body()
    return _ok()


@app.get("/fake-slack/users.info")
async def slack_users_info(user: str = "") -> JSONResponse:
    info = _SLACK_USERS.get(
        user, {"name": "devuser", "real_name": "Dev User", "email": "dev@example.com"}
    )
    return _ok(
        {
            "user": {
                "id": user,
                "name": info["name"],
                "real_name": info["real_name"],
                "profile": {
                    "email": info["email"],
                    "display_name": info["real_name"],
                    "real_name": info["real_name"],
                },
            }
        }
    )


@app.get("/fake-slack/conversations.info")
async def slack_conversations_info(channel: str = "") -> JSONResponse:
    return _ok(
        {
            "channel": {
                "id": channel,
                "name": "demo",
                "name_normalized": "demo",
                "topic": {"value": "Demo channel topic"},
                "purpose": {"value": "Demo channel purpose"},
            }
        }
    )


@app.get("/fake-slack/conversations.replies")
async def slack_conversations_replies(channel: str = "", ts: str = "") -> JSONResponse:
    msgs = fakes.slack_thread(channel, ts)
    return _ok(
        {
            "messages": [
                {
                    "type": "message",
                    "user": m["user"],
                    "text": m["text"],
                    "ts": m["ts"],
                    "thread_ts": m["thread_ts"],
                }
                for m in msgs
            ]
        }
    )


@app.get("/fake-slack/conversations.history")
async def slack_conversations_history(channel: str = "") -> JSONResponse:  # noqa: ARG001
    return _ok({"messages": []})


@app.get("/fake-slack/chat.getPermalink")
async def slack_get_permalink(channel: str = "", message_ts: str = "") -> JSONResponse:  # noqa: ARG001
    return _ok({"permalink": f"{BASE_URL}/mock/slack"})


# Quietly reference imports used only for env side effects.
_ = (e2e_env, HUMAN_USER)
