-- AscensionExporter - Core
local ADDON_NAME = ...
local AE = {}
AscensionExporter = AE

-- SavedVariables defaults
AscensionExporterConfig = AscensionExporterConfig or {}
AscensionExporterConfig.enableSavedVariables = AscensionExporterConfig.enableSavedVariables == true and true or false
AscensionExporterSaved = AscensionExporterSaved or {}

-- Utils
local function IsArray(t)
    if type(t) ~= "table" then return false end
    local n = 0
    for k, _ in pairs(t) do
        if type(k) ~= "number" then return false end
        n = n + 1
    end
    for i = 1, n do
        if t[i] == nil then return false end
    end
    return true
end

-- Shims for safety
local function SafeCall(fn, ...)
    local ok, r = pcall(fn, ...)
    if ok then return r end
    return nil
end

-- Export assembly
function AE:AssembleExport(which)
    local nowIso = date("!%Y-%m-%dT%H:%M:%SZ")
    local version, build, buildDate, toc = GetBuildInfo()

    local name = UnitName("player") or ""
    local level = UnitLevel("player") or 0
    local _, class = UnitClass("player")
    local _, race = UnitRace("player")
    local faction = UnitFactionGroup("player") or ""
    local realm = GetRealmName and GetRealmName() or (GetCVar and GetCVar("realmName")) or ""

    local out = {
        schemaVersion = 1,
        exportedAt = nowIso,
        client = { interface = toc or 30300, version = version, build = build, buildDate = buildDate },
        character = { name = name or "", realm = realm or "", level = level or 0, class = class or "", race = race or "", faction = faction or "" },
    }

    local wantAll = (which == nil) or (which == "all")

    if wantAll or which == "talents" then
        if AE.CollectTalents then
            out.talents = SafeCall(AE.CollectTalents) or {}
        end
    end

    if wantAll or which == "gear" then
        if AE.CollectGear then
            out.gear = SafeCall(AE.CollectGear) or {}
        end
    end

    if wantAll or which == "enchants" then
        if AE.CollectMysticEnchants then
            out.mysticEnchants = SafeCall(AE.CollectMysticEnchants) or {}
        end
    end

    return out
end

function AE:Export(which)
    local data = self:AssembleExport(which)
    -- Prefer global encoder from Util/Json.lua; fallback to a tiny local encoder if missing
    local function tiny_json_encode(v)
        local tv = type(v)
        if tv == 'nil' then return 'null' end
        if tv == 'boolean' then return v and 'true' or 'false' end
        if tv == 'number' then return tostring(v) end
        if tv == 'string' then
            local s = v:gsub('\\', '\\\\'):gsub('"', '\\"'):gsub('\n', '\\n'):gsub('\r', '\\r'):gsub('\t', '\\t')
            return '"' .. s .. '"'
        end
        if tv == 'table' then
            -- detect array-like
            local n = 0
            for k,_ in pairs(v) do if type(k) ~= 'number' then n = -1 break else n = math.max(n, k) end end
            if n >= 1 then
                local parts = {}
                for i=1,n do parts[#parts+1] = tiny_json_encode(v[i]) end
                return '[' .. table.concat(parts, ',') .. ']'
            else
                local parts = {}
                for k,val in pairs(v) do parts[#parts+1] = tiny_json_encode(tostring(k)) .. ':' .. tiny_json_encode(val) end
                return '{' .. table.concat(parts, ',') .. '}'
            end
        end
        return 'null'
    end
    local encoder = _G.AscensionExporter_Json_Encode or tiny_json_encode
    local json = encoder(data)

    local title = "Ascension Export"
    if which and which ~= "all" then title = title .. " - " .. which end
    AscensionExporter_ShowExportFrame(json, title .. " - Copy All (Ctrl+C)")

    if AscensionExporterConfig.enableSavedVariables then
        local key = (data.character.realm or "") .. ":" .. (data.character.name or "")
        AscensionExporterSaved[key] = data
        DEFAULT_CHAT_FRAME:AddMessage("AscensionExporter: export saved to SavedVariables for " .. key)
    end
end

-- Markdown gear table generator (for guide tables like mage-guide.md)
function AE:GenerateMarkdownGear()
    local gear = self.CollectGear and self.CollectGear() or { slots = {} }
    local ench = self.CollectMysticEnchants and self.CollectMysticEnchants() or { perSlot = {}, active = {} }

    -- Map gear by slot and mystic enchant per slot
    local bySlot = {}
    for _, s in ipairs(gear.slots or {}) do
        bySlot[s.slot] = s
    end
    local mystPer = {}
    for _, e in ipairs(ench.perSlot or {}) do
        mystPer[e.slot] = e.name
    end

    -- Desired order and pretty slot names matching the mage guide
    local ORDER = {
        {1,  "Head"},
        {2,  "Neck"},
        {3,  "Shoulders"},
        {15, "Back"},
        {5,  "Chest"},
        {9,  "Wrist"},
        {16, "Mainhand"},
        {17, "Offhand"},
        {18, "Wand"},
        {10, "Gloves"},
        {6,  "Belt"},
        {7,  "Legs"},
        {8,  "Boots"},
        {11, "Ring 1"},
        {12, "Ring 2"},
        {13, "Trinket 1"},
        {14, "Trinket 2"},
    }

    local function md_link(name, itemId)
        if (itemId or 0) > 0 and name and name ~= "" then
            return string.format("[%s](https://db.ascension.gg/?item=%d)", name, itemId)
        elseif name and name ~= "" then
            return name
        else
            return "-"
        end
    end

    local lines = {}
    table.insert(lines, "| Slot | Item | Location | Enchant | Alternative |")
    table.insert(lines, "|------|------|----------|---------|-------------|")

    for _, ent in ipairs(ORDER) do
        local slotId, label = ent[1], ent[2]
        local s = bySlot[slotId]
        local itemCell = "-"
        local enchantCell = "-"

        if s then
            itemCell = md_link(s.name, s.itemId)
            local base = s.enchant and s.enchant.name or nil
            local myst = mystPer[slotId]
            if base and base ~= "" then
                enchantCell = base
            end
            if myst and myst ~= "" then
                enchantCell = (enchantCell ~= "-" and enchantCell ~= nil and enchantCell ~= "")
                    and (enchantCell .. " / Mystic: " .. myst)
                    or ("Mystic: " .. myst)
            end
            if not enchantCell or enchantCell == "" then enchantCell = "-" end
        end

        local row = string.format("| **%s** | %s | - | %s | - |", label, itemCell, enchantCell)
        table.insert(lines, row)
    end

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

-- Slash command handling
SLASH_ASCX1 = "/ascx"
SLASH_ASCX2 = "/asxc" -- alias: both map to the same handler key "ASCX"
SlashCmdList["ASCX"] = function(msg)
    msg = msg or ""
    msg = msg:lower()
    if msg == "" or msg == "help" then
        -- Open the export window with helpful text and let buttons drive actions
        if AscensionExporter_ShowExportFrame then
            local help = "Use the buttons above or type:\n/ascx export all|talents|gear|enchants|mdgear\n/ascx sv on|off (SavedVariables is currently " .. (AscensionExporterConfig.enableSavedVariables and "ON" or "OFF") .. ")\n"
            AscensionExporter_ShowExportFrame(help, "Ascension Export - Tools & Help")
            return
        else
            DEFAULT_CHAT_FRAME:AddMessage("AscensionExporter usage:")
            DEFAULT_CHAT_FRAME:AddMessage("  /ascx export all|talents|gear|enchants|mdgear")
            DEFAULT_CHAT_FRAME:AddMessage("  /ascx sv on|off  - toggle SavedVariables export (currently " .. (AscensionExporterConfig.enableSavedVariables and "ON" or "OFF") .. ")")
            return
        end
    end

    local cmd, rest = msg:match("^(%S+)%s*(.*)$")
    if cmd == "export" then
        rest = rest ~= "" and rest or "all"
        if rest == "mdgear" or rest == "md" then
            local md = AE:GenerateMarkdownGear()
            AscensionExporter_ShowExportFrame(md, "Ascension Export - Markdown Gear - Copy All (Ctrl+C)")
        elseif rest == "all" or rest == "talents" or rest == "gear" or rest == "enchants" then
            AE:Export(rest)
        else
            DEFAULT_CHAT_FRAME:AddMessage("AscensionExporter: unknown export target '" .. tostring(rest) .. "'")
        end
        return
    elseif cmd == "sv" then
        if rest == "on" then
            AscensionExporterConfig.enableSavedVariables = true
            DEFAULT_CHAT_FRAME:AddMessage("AscensionExporter: SavedVariables export ENABLED")
        elseif rest == "off" then
            AscensionExporterConfig.enableSavedVariables = false
            DEFAULT_CHAT_FRAME:AddMessage("AscensionExporter: SavedVariables export DISABLED")
        else
            DEFAULT_CHAT_FRAME:AddMessage("AscensionExporter: sv on|off")
        end
        return
    else
        DEFAULT_CHAT_FRAME:AddMessage("AscensionExporter: unknown command. Type /ascx help")
    end
end

-- Basic event binding (not strictly necessary for slash-only usage)
local f = CreateFrame("Frame")
f:RegisterEvent("ADDON_LOADED")
f:SetScript("OnEvent", function(_, event, addon)
    if event == "ADDON_LOADED" and addon == ADDON_NAME then
        -- init defaults if needed
        AscensionExporterConfig.enableSavedVariables = AscensionExporterConfig.enableSavedVariables and true or false
    end
end)