import html

from fastapi import APIRouter, Form
from fastapi.responses import HTMLResponse

from ..catalog import load_apps, save_apps
from ..config import (
    DEFAULT_APPFACTORY_HOST,
    DEFAULT_GITEA_ORG,
    DELETE_APP_SCRIPT,
    DEPLOY_SCRIPT,
    GENERATE_COMPOSE_SCRIPT,
    NEW_APP_SCRIPT,
    read_env_value,
)
from ..shell import run_command
from ..templates.layout import page, render_result

router = APIRouter()


@router.get("/", response_class=HTMLResponse)
def index():
    apps = load_apps()

    gitea_url = read_env_value("GITEA_URL", "")
    gitea_org = read_env_value("GITEA_ORG", DEFAULT_GITEA_ORG)
    host = read_env_value("APPFACTORY_HOST", DEFAULT_APPFACTORY_HOST)

    rows = ""

    for item in apps:
        app_id = html.escape(item.get("id", ""))
        status = html.escape(item.get("status", ""))
        docs = html.escape(item.get("docs", f"/apps/{app_id}/docs"))
        memory = item.get("memory", "")
        cpus = item.get("cpus", "")

        http_clone = html.escape(f"git clone {gitea_url}/{gitea_org}/{app_id}.git")
        ssh_clone = html.escape(f"git clone ssh://git@{host}:2222/{gitea_org}/{app_id}.git")

        memory_options = ""
        for value, label in [
            ("", "Default"),
            ("256m", "256 MB - small service"),
            ("512m", "512 MB - normal service"),
            ("1g", "1 GB - larger service"),
            ("2g", "2 GB - heavy service"),
        ]:
            selected = "selected" if memory == value else ""
            memory_options += f'<option value="{value}" {selected}>{label}</option>'

        cpu_options = ""
        for value, label in [
            ("", "Default"),
            ("0.25", "0.25 CPU - very small"),
            ("0.50", "0.50 CPU - normal"),
            ("1.00", "1 CPU - full core"),
            ("2.00", "2 CPU - heavy"),
        ]:
            selected = "selected" if cpus == value else ""
            cpu_options += f'<option value="{value}" {selected}>{label}</option>'

        rows += f"""
        <tr>
            <td>
                <strong>{app_id}</strong><br>
                <span class="muted">/apps/{app_id}</span>
            </td>
            <td><span class="pill">{status}</span></td>
            <td><a href="{docs}">Swagger</a></td>
            <td>
                <form method="post" action="/portal/update-resources">
                    <input type="hidden" name="app_id" value="{app_id}">
                    <div class="inline-form">
                        <select name="memory">{memory_options}</select>
                        <select name="cpus">{cpu_options}</select>
                        <button type="submit">Apply</button>
                    </div>
                    <div class="resource-help">
                        Memory is RAM limit. CPU is max compute share.
                        Example: 0.50 = half CPU core, 1.00 = one full core.
                    </div>
                </form>
            </td>
            <td>
                <details>
                    <summary>Clone commands</summary>
                    <label class="muted">HTTP</label>
                    <div class="cmd-row">
                        <input readonly value="{http_clone}" id="http-{app_id}">
                        <button onclick="copyValue('http-{app_id}')">Copy</button>
                    </div>

                    <label class="muted">SSH</label>
                    <div class="cmd-row">
                        <input readonly value="{ssh_clone}" id="ssh-{app_id}">
                        <button onclick="copyValue('ssh-{app_id}')">Copy</button>
                    </div>
                </details>
            </td>
            <td>
                <form method="post" action="/portal/delete-app" onsubmit="return confirm('Delete {app_id}? This removes container, image, workspace, catalog entry and Gitea repo.');">
                    <input type="hidden" name="app_id" value="{app_id}">
                    <button type="submit" class="danger">Delete</button>
                </form>
            </td>
        </tr>
        """

    if not rows:
        rows = '<tr><td colspan="6">No apps deployed yet.</td></tr>'

    return page(
        "Apps",
        f"""
        <div class="grid">
            <div class="card">
                <h2>Apps</h2>
                <p class="muted">Create, deploy, clone, tune resources and delete services.</p>
                <a class="btn" href="/portal/new-app">+ New App</a>
            </div>
            <div class="card">
                <h2>Backups</h2>
                <p class="muted">Create backups and copy restore commands. Restore is intentionally manual and guarded.</p>
                <a class="btn" href="/portal/backups">Manage Backups</a>
            </div>
        </div>

        <div class="card">
            <h2>Deployed Apps</h2>
            <table>
                <tr>
                    <th>App</th>
                    <th>Status</th>
                    <th>Docs</th>
                    <th>Resources</th>
                    <th>Git</th>
                    <th>Actions</th>
                </tr>
                {rows}
            </table>
        </div>
        """,
    )


@router.get("/new-app", response_class=HTMLResponse)
def new_app_form():
    return page(
        "New App",
        """
        <div class="card">
            <h2>Create New App</h2>
            <p class="muted">This creates Gitea repo, webhook, local workspace, initial commit and deploys the service.</p>

            <form method="post" action="/portal/new-app">
                <p>
                    <label>App ID</label><br>
                    <input name="app_id" placeholder="gmail-service" required>
                </p>

                <p>
                    <label>App Name</label><br>
                    <input name="app_name" placeholder="Gmail Service" required>
                </p>

                <p>
                    <label>Template</label><br>
                    <select name="template">
                        <option value="python-fastapi">Python FastAPI</option>
                    </select>
                </p>

                <button type="submit">Create App</button>
            </form>

            <p><a href="/portal">&larr; Back</a></p>
        </div>
        """,
    )


@router.post("/new-app", response_class=HTMLResponse)
def create_app(app_id: str = Form(...), app_name: str = Form(...), template: str = Form(...)):
    if template != "python-fastapi":
        return HTMLResponse("Unsupported template", status_code=400)

    create_result = run_command([NEW_APP_SCRIPT, app_id, app_name])
    deploy_result = run_command([DEPLOY_SCRIPT, app_id])

    status = "OK" if create_result.returncode == 0 and deploy_result.returncode == 0 else "FAILED"

    return render_result(
        title=f"Create App: {status}",
        back_url="/portal",
        sections=[
            ("Create Output", create_result.stdout),
            ("Create Error", create_result.stderr),
            ("Deploy Output", deploy_result.stdout),
            ("Deploy Error", deploy_result.stderr),
        ],
        extra_link=f"/apps/{html.escape(app_id)}/docs",
        extra_label="Open Swagger",
    )


@router.post("/delete-app", response_class=HTMLResponse)
def delete_app(app_id: str = Form(...)):
    result = run_command([DELETE_APP_SCRIPT, app_id])
    status = "OK" if result.returncode == 0 else "FAILED"

    return render_result(
        title=f"Delete App: {status}",
        back_url="/portal",
        sections=[("Output", result.stdout), ("Error", result.stderr)],
    )


@router.post("/update-resources", response_class=HTMLResponse)
def update_resources(app_id: str = Form(...), memory: str = Form(""), cpus: str = Form("")):
    apps = load_apps()

    for item in apps:
        if item.get("id") == app_id:
            memory = memory.strip()
            cpus = cpus.strip()

            if memory:
                item["memory"] = memory
            else:
                item.pop("memory", None)

            if cpus:
                item["cpus"] = cpus
            else:
                item.pop("cpus", None)

    save_apps(apps)

    compose_result = run_command([GENERATE_COMPOSE_SCRIPT])
    deploy_result = run_command([DEPLOY_SCRIPT, app_id])

    status = "OK" if compose_result.returncode == 0 and deploy_result.returncode == 0 else "FAILED"

    return render_result(
        title=f"Update Resources: {status}",
        back_url="/portal",
        sections=[
            ("Compose Output", compose_result.stdout),
            ("Compose Error", compose_result.stderr),
            ("Deploy Output", deploy_result.stdout),
            ("Deploy Error", deploy_result.stderr),
        ],
    )