--[[
   Seeded from: http://lightroomsolutions.com/lightroom-to-instagram-via-a-web-browser/
   Updated with ChatGPT

   SETUP INSTRUCTIONS:
   Temporarily save this file onto your desktop.

   Now you need to create a scripts folder:
   In Lightroom, choose Lightroom > Preferences (Mac OS) or Edit > Preferences (Windows).
   Choose the Preset tab and select "Show All Other Lightroom Presets" folder.
   Create a folder in the Lightroom folder called "Scripts".
   Uncomment the lines at the bottom that you want to customize the plugin.
   Copy this file into the Scripts folder.

   You should now have a new "Scripts" folder containing this file.
   Quit and reopen Lightroom. You should see a scripts menu next to the Help menu.
--]]

local LrTasks       = require("LrTasks")
local LrApplication = require("LrApplication")
local LrDialogs     = require("LrDialogs")
local LrView        = require("LrView")

local catalog = LrApplication.activeCatalog()

-- Utility function: splits a string by a pattern
local function split(str, pat)
    local t = {}

    if str == nil or str == "" or type(str) == "table" then
        return { str }
    end

    local fpat = "(.-)" .. pat
    local last_end = 1
    local s, e, cap = str:find(fpat, 1)

    while s do
        if s ~= 1 or cap ~= "" then
            table.insert(t, cap)
        end
        last_end = e + 1
        s, e, cap = str:find(fpat, last_end)
    end

    if last_end <= #str then
        cap = str:sub(last_end)
        table.insert(t, cap)
    end

    return t
end

-- Function to copy text to the clipboard
local function copyToClipboard(text)
    -- Run 'uname' to check platform
    local uname = io.popen("uname"):read()

    -- macOS
    if uname == "Darwin" then
        os.execute('echo "' .. text .. '" | pbcopy')
    -- Windows
    elseif os.getenv("OS") and os.getenv("OS"):match("Windows") then
        os.execute('echo ' .. text .. ' | clip')
    else
        LrDialogs.message("Error", "Unsupported platform for clipboard copying.", "critical")
    end
end

-- Main async task
LrTasks.startAsyncTask(function()
    local photo = catalog:getTargetPhoto()
    local varFiles = {}

    -- Add title and caption if they exist
    local title = photo:getFormattedMetadata("title")
    local caption = photo:getFormattedMetadata("caption")

    if #title > 0 then
        table.insert(varFiles, title)
    end

    if #caption > 0 then
        table.insert(varFiles, caption)
    end

    -- Add line break
    table.insert(varFiles, "")

    -- Parse keywords and format as hashtags
    local keywordString = photo:getFormattedMetadata("keywordTagsForExport")
    local keywords = split(keywordString, ", ")
    local hashtags = {}

    for _, keyword in ipairs(keywords) do
        if #keyword > 0 then
            table.insert(hashtags, "#" .. keyword:gsub(" ", ""))
        end
    end

    -- Add default tags
    -- table.insert(hashtags, "#canon")
    table.insert(hashtags, "#lightroom")

    -- Add location-based hashtags if available
    local city = photo:getFormattedMetadata("city") or ""
    local state = photo:getFormattedMetadata("stateProvince") or ""
    local country = photo:getFormattedMetadata("country") or ""

    if #city > 0 then
       table.insert(hashtags, "#" .. city:gsub(" ", ""):lower())
    end

    if #state > 0 then
       table.insert(hashtags, "#" .. state:gsub(" ", ""):lower())
    end

    if #country > 0 then
       table.insert(hashtags, "#" .. country:gsub(" ", ""):lower())
    end

    -- Add hashtags to output
    table.insert(varFiles, table.concat(hashtags, " "))

    -- Combine all lines
    local outputText = table.concat(varFiles, "\n")

    -- outputText = outputText .. copyToClipboard(outputText)
    -- Display dialog
    local f = LrView.osFactory()
    local contents = f:row {
        f:column {
            f:edit_field {
                value = outputText,
                width_in_chars = 40,
                height_in_lines = 10
            },
            -- Add a spacer to create space between the text field and the button
            f:spacer { height = 10 },  -- This will add 10px space
            f:push_button {
               title = "Copy to Clipboard",
               action = function()
                  copyToClipboard(outputText)
                  -- Uncomment this to get a copy confirmation
                  -- LrDialogs.message("Success", "Data copied to clipboard.", "info")
               end
            }
        },
    }

    LrDialogs.presentModalDialog {
        title = "Copy to Instagram",
        contents = contents,
    }

    -- Uncomment this to automatically copy to clipboard
    -- copyToClipboard(outputText)
end)