{# Skills Container Partial - For HTMX updates #}
{# Calculate available skill points: level minus unlocked skills count #}
{% set skill_points = character.available_skill_points|default(character.level - (character.unlocked_skills|default([])|length), true) %}

<div class="skills-container" id="skills-container">
    {# Back Link #}
    <div class="skills-back-link">
        <a href="{{ url_for('character_views.view_character', character_id=character.character_id) }}">
            &larr; Back to {{ character.name }}
        </a>
    </div>

    {# Header #}
    <div class="skills-header">
        <h1>{{ character.name }}'s Skill Trees</h1>
        <div class="skills-info">
            <div class="skill-points-display">
                <span class="skill-points-label">Skill Points:</span>
                <span class="skill-points-value">{{ skill_points }}</span>
            </div>
            {% set respec_cost = character.level * 100 %}
            <button class="btn-respec"
                    hx-post="{{ url_for('character_views.respec_skills', character_id=character.character_id) }}"
                    hx-target="#skills-container"
                    hx-swap="outerHTML"
                    hx-confirm="Respec will reset all skills and cost {{ respec_cost }} gold. Continue?"
                    {% if character.gold < respec_cost or not character.unlocked_skills %}disabled{% endif %}>
                Respec ({{ respec_cost }} gold)
            </button>
        </div>
    </div>

    {# Flash Messages #}
    {% if message %}
    <div class="skills-message skills-message--success">{{ message }}</div>
    {% endif %}
    {% if error %}
    <div class="skills-message skills-message--error">{{ error }}</div>
    {% endif %}

    {# Skill Trees Grid #}
    {% if player_class and player_class.skill_trees %}
    <div class="skill-trees-grid">
        {% for tree in player_class.skill_trees %}
        <div class="skill-tree" data-tree-id="{{ tree.tree_id }}">
            {# Tree Header #}
            <div class="tree-header">
                <h2 class="tree-name">{{ tree.name }}</h2>
                <p class="tree-description">{{ tree.description }}</p>
            </div>

            {# Tree Diagram (Tiers 5 to 1, top to bottom) #}
            <div class="tree-diagram">
                {% for tier in range(5, 0, -1) %}
                <div class="skill-tier" data-tier="{{ tier }}">
                    <span class="tier-label">Tier {{ tier }}</span>
                    <div class="skill-nodes">
                        {% for node in tree.nodes if node.tier == tier %}
                            {# Determine node state #}
                            {% set is_unlocked = node.skill_id in character.unlocked_skills %}
                            {% set prereqs_met = not node.prerequisites or (node.prerequisites | select('in', character.unlocked_skills) | list | length == node.prerequisites | length) %}
                            {% set has_lower_tier = tier == 1 or (tree.nodes | selectattr('tier', 'equalto', tier - 1) | selectattr('skill_id', 'in', character.unlocked_skills) | list | length > 0) %}
                            {% set can_unlock = not is_unlocked and prereqs_met and has_lower_tier and skill_points > 0 %}
                            {% set has_prereq = node.prerequisites | length > 0 %}

                            <div class="skill-node {% if is_unlocked %}skill-node--unlocked{% elif can_unlock %}skill-node--available{% else %}skill-node--locked{% endif %}{% if has_prereq %} skill-node--has-prereq{% endif %}"
                                 data-skill-id="{{ node.skill_id }}"
                                 data-tree-id="{{ tree.tree_id }}"
                                 onmouseenter="showTooltip(event, '{{ node.skill_id }}')"
                                 onmouseleave="hideTooltip()">

                                <div class="node-icon">
                                    {% if is_unlocked %}
                                    &#10003;
                                    {% elif can_unlock %}
                                    &#9671;
                                    {% else %}
                                    &#9670;
                                    {% endif %}
                                </div>

                                <span class="node-name">{{ node.name }}</span>

                                {% if can_unlock %}
                                <button class="btn-unlock"
                                        hx-post="{{ url_for('character_views.unlock_skill', character_id=character.character_id) }}"
                                        hx-vals='{"skill_id": "{{ node.skill_id }}"}'
                                        hx-target="#skills-container"
                                        hx-swap="outerHTML"
                                        onclick="event.stopPropagation()">
                                    Unlock
                                </button>
                                {% endif %}
                            </div>
                        {% endfor %}
                    </div>
                </div>
                {% endfor %}
            </div>
        </div>
        {% endfor %}
    </div>

    {# Legend #}
    <div class="skills-legend">
        <div class="legend-item">
            <span class="legend-icon legend-icon--unlocked">&#10003;</span>
            <span>Unlocked</span>
        </div>
        <div class="legend-item">
            <span class="legend-icon legend-icon--available">&#9671;</span>
            <span>Available</span>
        </div>
        <div class="legend-item">
            <span class="legend-icon legend-icon--locked">&#9670;</span>
            <span>Locked</span>
        </div>
    </div>
    {% else %}
    <div class="skills-message skills-message--error">
        Unable to load skill trees for this class.
    </div>
    {% endif %}

    {# Tooltip Container #}
    <div id="skill-tooltip" class="skill-tooltip"></div>
</div>