"""Shared semantic HTML for the MinerOps Internal Alpha shell."""

from html import escape
from typing import Callable


NAVIGATION = (
    ("dashboard", "Dashboard", "/dashboard", "dashboard.view"),
    ("map", "Mine Map", "/monitoring/map", "locations.view"),
    ("repairs", "Repair Center", "/operations/repairs", "repairs.view"),
    ("miners", "Miners", "/assets/miners", "miners.view"),
)

PAGE_DETAILS = {
    "dashboard": (
        "Fleet overview",
        "Dashboard",
        "A concise starting point for operational state and recent activity.",
    ),
    "map": (
        "Monitoring / Spatial operations",
        "Mine Map",
        "Inspect where miners and operational conditions are concentrated.",
    ),
    "repairs": (
        "Operations",
        "Repair Center",
        "Review miners currently represented in the backend repair queue.",
    ),
    "miners": (
        "Assets",
        "Miners",
        "Search durable miner inventory and inspect current identity and state.",
    ),
}


def _dashboard_content() -> str:
    metrics = (
        ("Site health", "--", "Live health summary not yet connected"),
        ("Total miners", "--", "Inventory summary not yet connected"),
        ("Miners in repair", "--", "Repair summary not yet connected"),
        ("Current hashrate", "-- TH/s", "Telemetry not yet connected"),
        ("Current power", "-- kW", "Telemetry not yet connected"),
    )
    metric_html = "".join(
        "<article class='metric'>"
        f"<span class='metric-label'>{escape(label)}</span>"
        f"<strong class='metric-value'>{escape(value)}</strong>"
        f"<span class='metric-state'>{escape(state)}</span>"
        "</article>"
        for label, value, state in metrics
    )
    return f"""
<section class="metrics" aria-label="Fleet summary placeholders">
    {metric_html}
</section>
<div class="content-grid">
    <section class="panel" aria-labelledby="activityTitle">
        <div class="panel-head">
            <div>
                <h2 id="activityTitle">Recent activity</h2>
                <p class="panel-copy">Operational events will appear here when
                the dashboard activity feed is connected.</p>
            </div>
        </div>
        <div class="state-message">
            <strong>No activity feed connected</strong>
            <span>No events are fabricated for this placeholder.</span>
        </div>
    </section>
    <aside class="panel" aria-labelledby="attentionTitle">
        <h2 id="attentionTitle">Data boundary</h2>
        <p class="panel-copy">Summary cards intentionally show unavailable
        values until live APIs are connected and freshness can be represented
        accurately.</p>
    </aside>
</div>
"""


def _map_content() -> str:
    return """
<div class="notice" role="status">Live layout and telemetry data are not
connected to this Internal Alpha canvas. No production state is represented
below.</div>
<section class="map-layout" aria-label="Mine Map placeholder">
    <aside class="map-controls" aria-labelledby="mapHierarchyTitle">
        <h2 id="mapHierarchyTitle">Location hierarchy</h2>
        <ul class="hierarchy">
            <li>Site</li>
            <li>Room</li>
            <li>Rack</li>
            <li>Shelf / position</li>
        </ul>
        <div class="control-stack">
            <div class="field">
                <label for="statusLayer">Status layer</label>
                <select id="statusLayer" disabled>
                    <option>Live status unavailable</option>
                </select>
            </div>
            <div class="field">
                <label for="mapFilter">Filters</label>
                <input id="mapFilter" type="search"
                    placeholder="Filters not connected" disabled>
            </div>
        </div>
    </aside>
    <div class="map-viewport" aria-label="Operational map viewport">
        <div class="map-empty">
            <strong>Operational canvas</strong>
            <span>Site, room, rack, miner, and status overlays will render here
            when authoritative layout and telemetry sources are connected.</span>
        </div>
    </div>
    <aside class="map-inspector" aria-labelledby="selectionTitle">
        <h2 id="selectionTitle">Selection details</h2>
        <dl class="definition-list">
            <dt>Selection</dt><dd>None</dd>
            <dt>Status</dt><dd>Not connected</dd>
            <dt>Freshness</dt><dd>Unavailable</dd>
        </dl>
    </aside>
</section>
"""


def _state_messages(noun: str) -> str:
    return f"""
<div class="state-message" data-view-state="loading" role="status">
    <strong>Loading {noun}</strong>
    <span data-state-detail>Requesting current information from MinerOps.</span>
</div>
<div class="state-message" data-view-state="empty" hidden>
    <strong>No {noun} found</strong>
    <span data-state-detail>There is no information to show in this view.</span>
</div>
<div class="state-message" data-view-state="denied" data-kind="error" hidden>
    <strong>Access unavailable</strong>
    <span data-state-detail>Your account cannot view this information.</span>
</div>
<div class="state-message" data-view-state="error" data-kind="error" hidden>
    <strong>Could not load {noun}</strong>
    <span data-state-detail>Retry after checking the MinerOps connection.</span>
</div>
"""


def _repairs_content() -> str:
    return f"""
<section class="panel" aria-labelledby="repairQueueTitle">
    <div class="panel-head">
        <div>
            <h2 id="repairQueueTitle">Current repair queue</h2>
            <p class="panel-copy">Real records from the existing repair queue
            API. Open a miner to continue in its current detail view.</p>
        </div>
        <span class="freshness">Loaded on request</span>
    </div>
    {_state_messages("repair records")}
    <div class="table-wrap" data-view-state="ready" hidden>
        <table>
            <thead><tr><th>Miner</th><th>Model</th><th>Repair state</th>
            <th>Reported issue</th><th>Last update</th></tr></thead>
            <tbody id="repairRows"></tbody>
        </table>
    </div>
</section>
"""


def _miners_content() -> str:
    return f"""
<section class="panel" aria-labelledby="minerListTitle">
    <div class="panel-head">
        <div>
            <h2 id="minerListTitle">Miner inventory</h2>
            <p class="panel-copy">Real inventory records. Search matches the
            fields supported by the Inventory API.</p>
        </div>
        <span class="freshness">Up to 100 results</span>
    </div>
    <form class="filter-bar" id="minerSearchForm" role="search">
        <div class="field">
            <label for="minerSearchInput">Search miners</label>
            <input id="minerSearchInput" type="search" autocomplete="off"
                placeholder="Asset ID, MAC, serial, model, or IP">
        </div>
        <button class="command-button" type="submit">Search</button>
    </form>
    {_state_messages("miners")}
    <div class="table-wrap" data-view-state="ready" hidden>
        <table>
            <thead><tr><th>Asset ID</th><th>Current MAC</th><th>Model</th>
            <th>Lifecycle</th><th>Runtime</th><th>Location</th></tr></thead>
            <tbody id="minerRows"></tbody>
        </table>
    </div>
</section>
"""


CONTENT = {
    "dashboard": _dashboard_content,
    "map": _map_content,
    "repairs": _repairs_content,
    "miners": _miners_content,
}


def render_app_page(
    view: str,
    current_user: dict,
    has_permission: Callable[[str], bool],
) -> str:
    context, title, summary = PAGE_DETAILS[view]
    display_name = escape(
        str(
            current_user.get("display_name")
            or current_user.get("username")
            or "MinerOps user"
        )
    )
    role = escape(str(current_user.get("role") or "Authenticated user"))
    can_view_miners = has_permission("miners.view")
    navigation = "".join(
        (
            f'<li><a href="{href}" aria-current="page">{escape(label)}</a></li>'
            if key == view
            else f'<li><a href="{href}">{escape(label)}</a></li>'
        )
        for key, label, href, permission in NAVIGATION
        if has_permission(permission)
    )
    global_search = (
        '<form class="global-search" id="globalSearchForm" role="search">'
        '<label for="globalSearchInput">Search miners</label>'
        '<input id="globalSearchInput" type="search" autocomplete="off" '
        'placeholder="Search miners (more sources planned)">'
        '</form>'
        if can_view_miners
        else '<div class="global-search-unavailable" aria-hidden="true"></div>'
    )
    content = CONTENT[view]()
    return f"""<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>{escape(title)} | MinerOps</title>
    <link rel="stylesheet" href="/assets/minerops-app.css">
</head>
<body data-view="{escape(view)}"
    data-can-view-miners="{str(can_view_miners).lower()}">
    <a class="skip-link" href="#mainContent">Skip to main content</a>
    <div class="app-shell">
        <header class="topbar">
            <div class="brand-area">
                <button class="menu-button" id="menuButton" type="button"
                    aria-controls="primaryNav" aria-expanded="false">Menu</button>
                <a class="brand" href="/dashboard">
                    <span class="brand-name">MinerOps</span>
                    <span class="brand-tagline">Operational Intelligence for Mining</span>
                </a>
            </div>
            {global_search}
            <div class="session-tools">
                <button class="quiet-button" type="button"
                    aria-label="Alerts are not yet connected"
                    title="Alerts are not yet connected"
                    disabled>Alerts: unavailable</button>
                <div class="session-copy">
                    <span class="session-user">{display_name}</span>
                    <span class="session-role">{role}</span>
                </div>
                <button class="quiet-button" id="logoutButton"
                    type="button">Sign out</button>
            </div>
        </header>
        <nav class="primary-nav" id="primaryNav"
            aria-label="Primary navigation" data-open="false">
            <ul>{navigation}</ul>
            <p class="nav-note">Internal Alpha navigation. Additional
            destinations appear only as working, authorized views.</p>
        </nav>
        <main class="main-content" id="mainContent" tabindex="-1">
            <header class="page-head">
                <div>
                    <p class="eyebrow">{escape(context)}</p>
                    <h1>{escape(title)}</h1>
                    <p class="page-summary">{escape(summary)}</p>
                </div>
                <p class="freshness">Current view: {escape(title)}</p>
            </header>
            {content}
        </main>
    </div>
    <script src="/assets/minerops-app.js" defer></script>
</body>
</html>"""