-- src/routes/health.lua
-- Health monitoring and diagnostic routes for Furt API-Gateway
-- Dragons@Work Digital Sovereignty Project

local found_cjson, cjson = pcall(require, 'cjson')
if not found_cjson then
    cjson = require('dkjson')
end

local config = require("config.server")

local HealthRoute = {}

-- Get version information from merkwerk integration
function HealthRoute.get_version_info()
    -- Load merkwerk integration
    local success, merkwerk = pcall(require, "integrations.lua-api")
    if not success then
        print("WARNING: merkwerk integration not available, using fallback")
        return {
            service = "furt-lua",
            version = "?.?.?",
            content_hash = "unknown",
            vcs_info = { type = "none", hash = "", branch = "" },
            source = "fallback-no-merkwerk"
        }
    end

    -- Get merkwerk health info
    local health_info = merkwerk.get_health_info()

    -- Ensure compatibility with old VERSION-only expectations
    if not health_info.version then
        health_info.version = "?.?.?"
    end

    return health_info
end

-- Handle /health endpoint - system health check
function HealthRoute.handle_health(request, server)
    local version_info = HealthRoute.get_version_info()
    local response_data = {
        status = "healthy",
        service = version_info.service or "furt-lua",
        version = version_info.version,
        content_hash = version_info.content_hash,
        vcs_info = version_info.vcs_info,
        timestamp = os.time(),
        source = version_info.source,
        features = {
            smtp_configured = config.smtp_default and config.smtp_default.host ~= nil,
            auth_enabled = true,
            rate_limiting = true,
            rate_limits = config.security and config.security.rate_limits,
            merkwerk_integrated = version_info.source == "merkwerk"
        }
    }
    return server:create_response(200, response_data, nil, nil, request)
end

-- Handle /test endpoint - development testing (configurable)
function HealthRoute.handle_test(request, server)
    local response_data = {
        message = "Test endpoint working",
        received_data = request.body,
        headers_count = 0,
        warning = "This is a development endpoint (enabled via config)"
    }

    -- Count headers
    for _ in pairs(request.headers) do
        response_data.headers_count = response_data.headers_count + 1
    end

    return server:create_response(200, response_data, nil, nil, request)
end

return HealthRoute