-- browser.lua - Web browser functionality
-- Handles URL navigation, tabs, bookmarks, and history

local browser_doc = nil
local tabs = {}
local current_tab_id = 1
local history = {}
local bookmarks = {}

-- Sample page content
local pages = {
    ["example.com"] = {
        title = "Example Domain",
        secure = true,
        content = [[
            <div class="browser-page-title">Example Domain</div>
            <div class="browser-page-text">
                This domain is for use in illustrative examples in documents. You may use this domain in literature without prior coordination or asking for permission.
            </div>
            <div class="browser-page-text">
                <span class="browser-page-link" onclick="navigateToUrl('iana.org')">More information...</span>
            </div>
        ]]
    },
    ["google.com"] = {
        title = "Google",
        secure = true,
        content = [[
            <div style="text-align: center; padding: 60px 20px;">
                <div style="font-size: 48px; font-weight: 500; color: #4285F4;">G</div>
                <div style="font-size: 48px; font-weight: 500; color: #EA4335;">o</div>
                <div style="font-size: 48px; font-weight: 500; color: #FBBC05;">o</div>
                <div style="font-size: 48px; font-weight: 500; color: #4285F4;">g</div>
                <div style="font-size: 48px; font-weight: 500; color: #34A853;">l</div>
                <div style="font-size: 48px; font-weight: 500; color: #EA4335;">e</div>
                <div style="margin-top: 32px;">
                    <input type="text" style="width: 80%; padding: 12px 20px; font-size: 16px; border-radius: 24px; background-color: #f1f3f4; border: none;" placeholder="Search Google"/>
                </div>
            </div>
        ]]
    },
    ["mosis.app"] = {
        title = "Mosis - Virtual Smartphone for VR",
        secure = true,
        content = [[
            <div class="browser-page-title">Welcome to Mosis</div>
            <div class="browser-page-text">
                Mosis is a virtual smartphone OS for VR games and applications. Experience a phone-like device inside your virtual reality environment.
            </div>
            <div style="margin-top: 24px;">
                <div class="browser-search-item" onclick="navigateToUrl('mosis.app/apps')">
                    <div class="browser-search-title">Browse Apps</div>
                    <div class="browser-search-desc">Discover apps for your virtual phone</div>
                </div>
                <div class="browser-search-item" onclick="navigateToUrl('mosis.app/developers')">
                    <div class="browser-search-title">For Developers</div>
                    <div class="browser-search-desc">Build apps for the Mosis platform</div>
                </div>
            </div>
        ]]
    },
    ["default"] = {
        title = "Page Not Found",
        secure = false,
        content = [[
            <div style="text-align: center; padding: 60px 20px;">
                <div style="font-size: 64px; color: #888888;">:(</div>
                <div style="font-size: 24px; color: #333333; margin-top: 24px;">Page Not Found</div>
                <div style="font-size: 16px; color: #666666; margin-top: 12px;">The requested page could not be loaded.</div>
            </div>
        ]]
    }
}

-- Initialize tabs
local function initTabs()
    tabs = {
        {id = 1, url = "example.com", title = "Example Domain"}
    }
    current_tab_id = 1
end

-- Initialize browser
function initBrowser(doc)
    print("[Browser] Initializing...")
    browser_doc = doc
    initTabs()
    loadPage(tabs[1].url)
end

-- Get current tab
local function getCurrentTab()
    for _, tab in ipairs(tabs) do
        if tab.id == current_tab_id then
            return tab
        end
    end
    return tabs[1]
end

-- Load a page
function loadPage(url)
    if not browser_doc then return end

    print("[Browser] Loading: " .. url)

    -- Clean URL
    url = url:gsub("^https?://", ""):gsub("^www%.", ""):gsub("/$", "")

    -- Update current tab
    local tab = getCurrentTab()
    if tab then
        tab.url = url
    end

    -- Add to history
    table.insert(history, 1, {url = url, time = "Just now"})

    -- Get page data
    local page = pages[url] or pages["default"]
    if tab then
        tab.title = page.title
    end

    -- Update URL bar
    local url_input = browser_doc:GetElementById("url-input")
    if url_input then
        url_input.value = url
    end

    -- Update secure icon
    local secure_icon = browser_doc:GetElementById("secure-icon")
    if secure_icon then
        if page.secure then
            secure_icon.inner_rml = "S"
            secure_icon.style.color = "#4CAF50"
        else
            secure_icon.inner_rml = "!"
            secure_icon.style.color = "#F44336"
        end
    end

    -- Update page title
    local title = browser_doc:GetElementById("page-title")
    if title then
        title.inner_rml = page.title
    end

    -- Update content
    local content = browser_doc:GetElementById("browser-content")
    if content then
        content.inner_rml = [[<div class="browser-page">]] .. page.content .. [[</div>]]
    end

    -- Update tab count
    updateTabCount()
end

-- Navigate to URL
function navigateToUrl(url)
    loadPage(url)
end

-- Handle URL input
function onUrlSubmit()
    if not browser_doc then return end

    local input = browser_doc:GetElementById("url-input")
    if input then
        local url = input.value or ""
        if url ~= "" then
            loadPage(url)
        end
    end
end

-- Go back in history
function browserBack()
    if #history > 1 then
        table.remove(history, 1)  -- Remove current page
        local prev = history[1]
        if prev then
            loadPage(prev.url)
        end
    end
end

-- Go forward (simplified - just reload)
function browserForward()
    if showToast then
        showToast("No forward history")
    end
end

-- Refresh page
function browserRefresh()
    local tab = getCurrentTab()
    if tab then
        loadPage(tab.url)
        if showToast then
            showToast("Page refreshed")
        end
    end
end

-- Update tab count display
function updateTabCount()
    if not browser_doc then return end

    local count = browser_doc:GetElementById("tab-count")
    if count then
        count.inner_rml = tostring(#tabs)
    end
end

-- Open new tab
function newTab()
    local new_id = #tabs + 1
    table.insert(tabs, {
        id = new_id,
        url = "mosis.app",
        title = "New Tab"
    })
    current_tab_id = new_id
    loadPage("mosis.app")
    updateTabCount()
    print("[Browser] New tab opened: " .. new_id)
end

-- Show tabs view
function showTabs()
    print("[Browser] Show tabs")
    if showToast then
        showToast(#tabs .. " tab(s) open")
    end
end

-- Close current tab
function closeTab()
    if #tabs > 1 then
        for i, tab in ipairs(tabs) do
            if tab.id == current_tab_id then
                table.remove(tabs, i)
                break
            end
        end
        current_tab_id = tabs[1].id
        loadPage(tabs[1].url)
        updateTabCount()
    else
        if showToast then
            showToast("Cannot close last tab")
        end
    end
end

-- Add to bookmarks
function addBookmark()
    local tab = getCurrentTab()
    if tab then
        table.insert(bookmarks, {
            url = tab.url,
            title = tab.title
        })
        if showToast then
            showToast("Bookmark added")
        end
    end
end

-- Show bookmarks
function showBookmarks()
    print("[Browser] Show bookmarks")
    if showToast then
        showToast(#bookmarks .. " bookmark(s)")
    end
end

-- Show history
function showHistory()
    print("[Browser] Show history")
    if showToast then
        showToast(#history .. " items in history")
    end
end

-- Share page
function sharePage()
    local tab = getCurrentTab()
    if tab then
        print("[Browser] Share: " .. tab.url)
        if showToast then
            showToast("Share: " .. tab.url)
        end
    end
end

-- Show menu
function showBrowserMenu()
    print("[Browser] Show menu")
    -- TODO: Show dropdown menu
end

-- Go to home
function browserHome()
    loadPage("mosis.app")
end