from __future__ import annotations

import argparse
import json
import sys
from dataclasses import asdict
from pathlib import Path


ROOT_DIR = Path(__file__).resolve().parent.parent
if str(ROOT_DIR) not in sys.path:
    sys.path.insert(0, str(ROOT_DIR))

from scripts.deployment_handoff import DEFAULT_OUT as DEFAULT_HANDOFF_OUT
from scripts.deployment_handoff import format_key_value_block
from scripts.deployment_handoff import build_handoff, write_markdown
from scripts.deployment_status import build_status
from scripts.export_hf_space import DEFAULT_OUTPUT as DEFAULT_SPACE_OUT
from scripts.export_hf_space import export_hf_space, validate_export
from scripts.next_deployment_step import choose_next_step
from scripts.validate_deployment_env import summarize as summarize_env_checks
from scripts.validate_deployment_env import validate_deployment_env


DEFAULT_REPORT = ROOT_DIR / "outputs" / "deployment-prep.json"
DEFAULT_QUICKSTART = ROOT_DIR / "outputs" / "deployment-quickstart.md"
DEFAULT_VERCEL_ENV_OUT = ROOT_DIR / "outputs" / "vercel-production.env"
DEFAULT_WORKER_ENV_OUT = ROOT_DIR / "outputs" / "worker-secrets.env"
DEFAULT_VERCEL_COMMANDS_OUT = ROOT_DIR / "outputs" / "apply-vercel-env.ps1"
DEFAULT_WORKER_SETTINGS_OUT = ROOT_DIR / "outputs" / "worker-space-settings.md"


def prepare_live_deployment(
    worker_url: str | None = None,
    origin: str | None = None,
    code: str = "1234",
    secret_key: str | None = None,
    *,
    space_out: Path = DEFAULT_SPACE_OUT,
    report_out: Path = DEFAULT_REPORT,
    handoff_out: Path = DEFAULT_HANDOFF_OUT,
    quickstart_out: Path = DEFAULT_QUICKSTART,
    vercel_env_out: Path = DEFAULT_VERCEL_ENV_OUT,
    worker_env_out: Path = DEFAULT_WORKER_ENV_OUT,
    vercel_commands_out: Path = DEFAULT_VERCEL_COMMANDS_OUT,
    worker_settings_out: Path = DEFAULT_WORKER_SETTINGS_OUT,
    force: bool = True,
) -> dict[str, object]:
    export_result = export_hf_space(space_out, force=force)
    export_issues = validate_export(space_out)
    handoff_path: str | None = None
    verify_command: str | None = None
    vercel_env_path: str | None = None
    worker_env_path: str | None = None
    vercel_commands_path: str | None = None
    worker_settings_path: str | None = None
    env_validation: dict[str, object] | None = None

    if worker_url and origin:
        handoff = build_handoff(worker_url, origin, code, secret_key)
        write_markdown(handoff_out, handoff)
        write_env_file(vercel_env_out, handoff.vercel_env)
        write_env_file(worker_env_out, handoff.worker_secrets)
        write_vercel_commands(
            vercel_commands_out,
            handoff.vercel_cleanup_commands,
            handoff.vercel_cli_commands,
            validate_command=handoff.commands["validateEnv"],
            preflight_command=handoff.commands["diagnoseVercelWorker"],
        )
        write_worker_settings(worker_settings_out, handoff)
        handoff_path = str(handoff_out)
        vercel_env_path = str(vercel_env_out)
        worker_env_path = str(worker_env_out)
        vercel_commands_path = str(vercel_commands_out)
        worker_settings_path = str(worker_settings_out)
        verify_command = handoff.commands["verifyLive"]
        env_validation = summarize_env_checks(
            validate_deployment_env(
                handoff.vercel_env,
                handoff.worker_secrets,
                expected_worker_url=handoff.worker_url,
                expected_origin=handoff.vercel_origin,
            )
        )

    next_step = choose_next_step(worker_url=worker_url, vercel_origin=origin, code=code)
    status = build_status(worker_url=worker_url, vercel_origin=origin, code=code)
    write_quickstart(
        quickstart_out,
        space_out=space_out,
        handoff_out=Path(handoff_path) if handoff_path else handoff_out,
        worker_url=worker_url,
        origin=origin,
        code=code,
        worker_settings_out=Path(worker_settings_path) if worker_settings_path else worker_settings_out,
        next_title=next_step.title,
        next_detail=next_step.detail,
        next_command=next_step.command,
    )
    report: dict[str, object] = {
        "ready": not export_issues,
        "spaceBundle": export_result,
        "spaceIssues": export_issues,
        "handoff": handoff_path,
        "vercelEnv": vercel_env_path,
        "workerEnv": worker_env_path,
        "vercelCommands": vercel_commands_path,
        "workerSettings": worker_settings_path,
        "envValidation": env_validation,
        "quickstart": str(quickstart_out),
        "verifyCommand": verify_command,
        "nextStep": asdict(next_step),
        "deploymentStatus": asdict(status),
    }
    report_out.parent.mkdir(parents=True, exist_ok=True)
    report_out.write_text(json.dumps(report, indent=2), encoding="utf-8")
    return report


def write_env_file(path: Path, values: dict[str, str]) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(format_key_value_block(values) + "\n", encoding="utf-8")


def write_vercel_commands(
    path: Path,
    cleanup_commands: list[str],
    env_commands: list[str],
    *,
    validate_command: str | None = None,
    preflight_command: str | None = None,
) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    lines = [
        "# Generated by scripts\\prepare_live_deployment.py.",
        "# This file contains deployment secrets. Keep it private and do not commit it.",
        "# Production Vercel audio must use WORKER_BASE_URL; direct Hugging Face cloud TTS is only for short tests.",
        "",
        "# Remove temporary direct-cloud fallback values from production.",
        *cleanup_commands,
        "",
        "# Add/update the production variables for the Vercel shell.",
        *env_commands,
        "",
        "# Verify that Vercel points to the worker and does not have direct-cloud fallback variables enabled.",
        *(["# " + validate_command] if validate_command else []),
        "",
        "# After Vercel redeploys and the worker is awake, verify browser-to-worker reachability and CORS.",
        *(["# " + preflight_command] if preflight_command else []),
        "",
    ]
    path.write_text("\n".join(lines), encoding="utf-8")


def write_worker_settings(path: Path, handoff) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(
        "\n".join(
            [
                "# Hugging Face Worker Settings",
                "",
                "Generated by `scripts\\prepare_live_deployment.py`. This file contains deployment secrets, so keep it private and do not commit it.",
                "",
                "## Space Secrets",
                "",
                "Paste these into the Hugging Face Space **Settings > Secrets** page:",
                "",
                "```text",
                format_key_value_block(handoff.worker_secrets),
                "```",
                "",
                "## Balanced Docker Build Args",
                "",
                "Use these first for a strong Arabic OCR worker without immediately enabling the heaviest QARI/PaddleOCR-VL paths:",
                "",
                "```text",
                format_key_value_block(handoff.recommended_build_args),
                "```",
                "",
                "## Maximum Quality Docker Build Args",
                "",
                "Use these only on larger hardware after a 5-page benchmark shows the heavier models help this book:",
                "",
                "```text",
                format_key_value_block(handoff.maximum_quality_build_args),
                "```",
                "",
                "## Verify The Settings",
                "",
                "After setting the Space secrets/build args, rebuild or restart the Space, then validate the generated env files:",
                "",
                "```powershell",
                handoff.commands["validateEnv"],
                "```",
                "",
                "Then run hosted preflight before any real PDF upload:",
                "",
                "```powershell",
                handoff.commands["diagnoseVercelWorker"],
                "```",
                "",
                "Then run the live proof:",
                "",
                "```powershell",
                handoff.commands["verifyLive"],
                "```",
                "",
            ]
        ),
        encoding="utf-8",
    )


def write_quickstart(
    path: Path,
    *,
    space_out: Path,
    handoff_out: Path,
    worker_url: str | None,
    origin: str | None,
    code: str,
    worker_settings_out: Path,
    next_title: str,
    next_detail: str,
    next_command: str,
) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    worker_display = worker_url or "https://your-space.hf.space"
    origin_display = origin or "https://your-vercel-app.vercel.app"
    handoff_command = (
        f"python scripts\\deployment_handoff.py {worker_display} "
        f"--origin {origin_display} --code {code}"
    )
    hosted_preflight_command = (
        f"python scripts\\hosted_preflight.py {origin_display} "
        f"--code {code} --worker-url {worker_display}"
    )
    prepare_command = (
        f"python scripts\\prepare_live_deployment.py --worker-url {worker_display} "
        f"--origin {origin_display} --code {code}"
    )
    path.write_text(
        "\n".join(
            [
                "# Arabic Audio Reader Deployment Quickstart",
                "",
                "This file is generated by `scripts\\prepare_live_deployment.py` so the live deployment steps stay in one place.",
                "",
                "## What This Prepared",
                "",
                f"- Hugging Face Docker Space bundle: `{space_out}`",
                f"- Deployment handoff, after real URLs exist: `{handoff_out}`",
                f"- Hugging Face worker settings sheet, after real URLs exist: `{worker_settings_out}`",
                f"- Access code: `{code}`",
                "",
                "## Create The Free Worker",
                "",
                "Open: https://huggingface.co/new-space",
                "Reference: https://huggingface.co/docs/hub/main/en/spaces-sdks-docker",
                "",
                "1. Create a Hugging Face Space.",
                "2. Choose **Docker** as the Space SDK.",
                f"3. Upload or push the generated folder: `{space_out}`",
                "4. Use the secrets/build args from the generated worker settings sheet after you know the real Vercel URL.",
                "",
                "Free CPU Spaces are enough for proof and small samples. For a full 100 MB+ scanned book, expect slow jobs and cold starts unless you move the worker to stronger hardware.",
                "",
                "## Create The Vercel Site",
                "",
                "Open: https://vercel.com/new",
                "Reference: https://vercel.com/docs/frameworks/backend/fastapi",
                "",
                "1. Import this GitHub repo into Vercel.",
                "2. Use the default/Other preset; the repo already has `vercel.json` for the Python FastAPI entrypoint.",
                "3. Set `ACCESS_CODE`, `SECRET_KEY`, and `WORKER_BASE_URL` from the deployment handoff.",
                "4. Remove any temporary direct-cloud TTS variables from earlier tests: `ENABLE_DIRECT_CLOUD_TTS`, `HF_API_TOKEN`, `HF_TTS_MODEL`, and `DEFAULT_VOICE_ID`.",
                "5. Deploy to Production.",
                "6. If generated env files exist, run `scripts\\validate_deployment_env.py` before the final deploy.",
                "7. If `outputs\\apply-vercel-env.ps1` exists, it contains the generated Vercel env commands.",
                "",
                "## After Both URLs Exist",
                "",
                "Regenerate the exact secret/env/verification sheet with the real URLs:",
                "",
                "```powershell",
                handoff_command,
                "```",
                "",
                "Or refresh the worker bundle and handoff together:",
                "",
                "```powershell",
                prepare_command,
                "```",
                "",
                "Before uploading a large PDF, run hosted preflight from Vercel to the worker:",
                "",
                "```powershell",
                hosted_preflight_command,
                "```",
                "",
                "It writes `outputs\\hosted-preflight.json` and must pass `site worker reachable from vercel` and `site worker CORS ready`.",
                "",
                "## Safety Checklist",
                "",
                "- Validate generated env files with `python scripts\\validate_deployment_env.py --vercel-env outputs\\vercel-production.env --worker-env outputs\\worker-secrets.env --worker-url "
                f"{worker_display} --origin {origin_display}`.",
                "- Put the same generated `SECRET_KEY` in Hugging Face and Vercel.",
                "- Put the same access code in Hugging Face and Vercel.",
                "- Point Hugging Face `CORS_ORIGINS` at the exact Vercel production URL.",
                "- Point Vercel `WORKER_BASE_URL` at the exact Hugging Face Space URL.",
                "- Keep Vercel direct Hugging Face TTS disabled in production; downloadable audio should come from the worker.",
                "- Run the live proof command before giving the site to anyone.",
                "",
                "## Current Next Command",
                "",
                f"**{next_title}**",
                "",
                next_detail,
                "",
                "```powershell",
                next_command,
                "```",
                "",
                "The project is not considered live-finished until `outputs\\live-deployment-proof.json` says `complete: true` and the final audit has no live-deployment warnings.",
                "",
            ]
        ),
        encoding="utf-8",
    )


def main() -> None:
    parser = argparse.ArgumentParser(description="Prepare the live Vercel plus worker deployment artifacts.")
    parser.add_argument("--worker-url", help="Live worker URL, for example https://your-space.hf.space")
    parser.add_argument("--origin", help="Live Vercel origin, for example https://your-app.vercel.app")
    parser.add_argument("--code", default="1234", help="Access code for the site and worker.")
    parser.add_argument("--secret-key", help="Optional fixed cookie-signing secret. Omit to generate one in the handoff.")
    parser.add_argument("--space-out", type=Path, default=DEFAULT_SPACE_OUT, help="Destination for the Hugging Face Space bundle.")
    parser.add_argument("--report-out", type=Path, default=DEFAULT_REPORT, help="JSON deployment prep report path.")
    parser.add_argument("--handoff-out", type=Path, default=DEFAULT_HANDOFF_OUT, help="Markdown handoff path when URLs are provided.")
    parser.add_argument("--quickstart-out", type=Path, default=DEFAULT_QUICKSTART, help="Markdown quickstart path.")
    parser.add_argument("--vercel-env-out", type=Path, default=DEFAULT_VERCEL_ENV_OUT, help="Generated .env-style Vercel production variables.")
    parser.add_argument("--worker-env-out", type=Path, default=DEFAULT_WORKER_ENV_OUT, help="Generated .env-style worker/Space secrets.")
    parser.add_argument("--vercel-commands-out", type=Path, default=DEFAULT_VERCEL_COMMANDS_OUT, help="Generated private PowerShell commands for Vercel production env.")
    parser.add_argument("--worker-settings-out", type=Path, default=DEFAULT_WORKER_SETTINGS_OUT, help="Generated private Hugging Face worker settings sheet.")
    parser.add_argument("--no-force", action="store_true", help="Do not replace an existing Space bundle.")
    parser.add_argument("--json", action="store_true", help="Print JSON instead of a compact summary.")
    args = parser.parse_args()

    report = prepare_live_deployment(
        args.worker_url,
        args.origin,
        args.code,
        args.secret_key,
        space_out=args.space_out,
        report_out=args.report_out,
        handoff_out=args.handoff_out,
        quickstart_out=args.quickstart_out,
        vercel_env_out=args.vercel_env_out,
        worker_env_out=args.worker_env_out,
        vercel_commands_out=args.vercel_commands_out,
        worker_settings_out=args.worker_settings_out,
        force=not args.no_force,
    )
    if args.json:
        print(json.dumps(report, indent=2))
    else:
        print(f"Wrote deployment prep report to {args.report_out}")
        print(f"Exported Hugging Face Space bundle to {report['spaceBundle']['outputDir']}")
        print(f"Wrote deployment quickstart to {report['quickstart']}")
        if report["handoff"]:
            print(f"Wrote deployment handoff to {report['handoff']}")
            print(f"Wrote Vercel env file to {report['vercelEnv']}")
            print(f"Wrote worker env file to {report['workerEnv']}")
            print(f"Wrote Vercel command file to {report['vercelCommands']}")
            print(f"Wrote worker settings sheet to {report['workerSettings']}")
        print(report["nextStep"]["command"])
    if report["spaceIssues"]:
        raise SystemExit(1)


if __name__ == "__main__":
    main()