from __future__ import annotations

import argparse
from pathlib import Path
import sys

from .config import load_config
from .docsgen import generate_docs
from .launch import prepare_open
from .plan import plan_url
from .platforms import PLATFORM_CHOICES
from .routing import route_url
from .transports import inspect_transports


def main(argv: list[str] | None = None) -> int:
    parser = argparse.ArgumentParser(prog="ampbrowser")
    subcommands = parser.add_subparsers(dest="command", required=True)

    route_parser = subcommands.add_parser("route", help="Route a URL to a transport.")
    route_parser.add_argument("url")

    plan_parser = subcommands.add_parser("plan", help="Plan how a URL would be opened.")
    plan_parser.add_argument("url")
    plan_parser.add_argument("--config", type=Path, help="Path to an AMPB config file.")
    plan_parser.add_argument("--platform", choices=PLATFORM_CHOICES, help="Target platform capability profile.")

    open_parser = subcommands.add_parser("open", help="Prepare a transport-aware open plan.")
    open_parser.add_argument("url")
    open_parser.add_argument("--config", type=Path, help="Path to an AMPB config file.")
    open_parser.add_argument("--platform", choices=PLATFORM_CHOICES, help="Target platform capability profile.")
    open_parser.add_argument(
        "--yes",
        action="store_true",
        help="Approve first-use setup in the dry-run plan.",
    )
    open_parser.add_argument(
        "--dry-run",
        action="store_true",
        default=True,
        help="Print the open plan without side effects. This is the current default.",
    )

    subcommands.add_parser("inspect", help="Inspect local transport readiness.")

    docs_parser = subcommands.add_parser("docs", help="Generate or check generated docs.")
    docs_subcommands = docs_parser.add_subparsers(dest="docs_command", required=True)
    docs_generate = docs_subcommands.add_parser("generate", help="Generate docs from code.")
    docs_generate.add_argument("--check", action="store_true")

    args = parser.parse_args(argv)
    try:
        if args.command == "route":
            return _cmd_route(args.url)
        if args.command == "plan":
            return _cmd_plan(args.url, config_path=args.config, platform=args.platform)
        if args.command == "open":
            return _cmd_open(
                args.url,
                consent=args.yes,
                dry_run=args.dry_run,
                config_path=args.config,
                platform=args.platform,
            )
        if args.command == "inspect":
            return _cmd_inspect()
        if args.command == "docs":
            return _cmd_docs(args)
    except Exception as exc:  # noqa: BLE001
        print(f"AMPBROWSER status=error message={exc}", file=sys.stderr)
        return 1
    return 1


def _cmd_route(url: str) -> int:
    route = route_url(url)
    print(
        "AMPBROWSER_ROUTE "
        f"url={route.normalized} "
        f"transport={route.transport} "
        f"profile={route.profile} "
        f"reason=\"{route.reason}\""
    )
    return 0


def _cmd_plan(url: str, *, config_path: Path | None, platform: str | None) -> int:
    config = load_config(Path.cwd(), config_path)
    plan = plan_url(url, config=config, platform=platform)
    endpoint = plan.status.endpoint if plan.status else "-"
    running = str(plan.status.running).lower() if plan.status else "false"
    installed = str(plan.status.installed).lower() if plan.status else "false"
    prompt = plan.prompt.replace('"', "'") if plan.prompt else "-"
    print(
        "AMPBROWSER_PLAN "
        f"url={plan.route.normalized} "
        f"transport={plan.route.transport} "
        f"profile={plan.route.profile} "
        f"installed={installed} "
        f"running={running} "
        f"endpoint={endpoint} "
        f"platform={plan.platform_capability.platform} "
        f"platform_browse={plan.platform_capability.browse} "
        f"platform_manage={plan.platform_capability.manage} "
        f"policy={plan.policy_mode} "
        f"requires_consent={str(plan.requires_consent).lower()} "
        f"action=\"{plan.action}\" "
        f"prompt=\"{prompt}\""
    )
    return 0


def _cmd_open(
    url: str,
    *,
    consent: bool,
    dry_run: bool,
    config_path: Path | None,
    platform: str | None,
) -> int:
    config = load_config(Path.cwd(), config_path)
    open_plan = prepare_open(url, consent=consent, dry_run=dry_run, config=config, platform=platform)
    browse_plan = open_plan.browse_plan
    setup_steps = "|".join(open_plan.setup_steps) if open_plan.setup_steps else "-"
    message = _safe(open_plan.message)
    print(
        "AMPBROWSER_OPEN "
        f"url={browse_plan.route.normalized} "
        f"transport={browse_plan.route.transport} "
        f"profile={browse_plan.route.profile} "
        f"status={open_plan.status} "
        f"dry_run={str(open_plan.dry_run).lower()} "
        f"platform={browse_plan.platform_capability.platform} "
        f"platform_browse={browse_plan.platform_capability.browse} "
        f"platform_manage={browse_plan.platform_capability.manage} "
        f"policy={browse_plan.policy_mode} "
        f"requires_consent={str(browse_plan.requires_consent).lower()} "
        f"consent_granted={str(open_plan.consent_granted).lower()} "
        f"profile_path={open_plan.profile_path} "
        f"proxy={open_plan.proxy} "
        f"setup_steps=\"{_safe(setup_steps)}\" "
        f"message=\"{message}\""
    )
    return 0


def _cmd_inspect() -> int:
    for status in inspect_transports():
        print(
            "AMPBROWSER_INSPECT "
            f"transport={status.transport} "
            f"installed={str(status.installed).lower()} "
            f"running={str(status.running).lower()} "
            f"adoptable={str(status.adoptable).lower()} "
            f"manage_supported={str(status.manage_supported).lower()} "
            f"endpoint={status.endpoint} "
            f"note=\"{status.note}\""
        )
    return 0


def _cmd_docs(args) -> int:
    if args.docs_command == "generate":
        changed = generate_docs(Path.cwd(), check=args.check)
        changed_text = ",".join(str(path) for path in changed) if changed else "-"
        mode = "check" if args.check else "write"
        print(f"AMPBROWSER_DOCS status=ok mode={mode} changed={changed_text}")
        return 0
    return 1


def _safe(value: str) -> str:
    return value.replace('"', "'")