code_hierarchy.lua

-- MCP Tool: code_hierarchy
-- Inheritance and implementation tree
-- Entry kind: function.lua

local tools = require("tools")
local fmt = require("fmt")

local function call(arguments)
    if not arguments.symbol or arguments.symbol == "" then
        return tools.format_error("'symbol' parameter is required")
    end

    local result, err = tools.request("query:hierarchy", {
        symbol = arguments.symbol,
        direction = arguments.direction or "both",
        project = arguments.project,
    })

    if err then return tools.format_error(err) end

    local lines = {}
    table.insert(lines, "# Hierarchy: " .. result.name)
    if result.kind then
        table.insert(lines, "Kind: " .. result.kind)
    end
    table.insert(lines, "")

    -- Ancestors (upward)
    if result.ancestors and #result.ancestors > 0 then
        table.insert(lines, "## Ancestors (extends chain)")
        for i, ancestor in ipairs(result.ancestors) do
            table.insert(lines, string.rep("  ", i - 1) .. "└── " .. ancestor)
        end
        table.insert(lines, "")
    end

    -- Descendants (downward)
    if result.descendants then
        table.insert(lines, "## Descendants (subclasses / implementations)")
        local tree_lines = fmt.render_tree(result.descendants, {max_depth = 10})
        for _, l in ipairs(tree_lines) do
            table.insert(lines, l)
        end
        table.insert(lines, "")
    end

    return table.concat(lines, "\n")
end

return { call = call }