local M = {}

local utils = require("vern.utils")
local templates = require("vern.templates")
local action_utils = require("vern.actions.utils")

local join = vim.fs.joinpath

---@param opts VernCConfig
function M.create_project(opts)
    vim.ui.input({ prompt = "Enter project name: " }, function(pname)
        pname = pname and vim.trim(pname)
        if not pname or pname == "" then
            return
        end

        local configs = require("vern.configs.c")

        ---@type VernCConfig
        local cfg = vim.tbl_deep_extend("force", {}, configs, configs, opts or {})
        local root = join(vim.fn.expand(cfg.workspace_root), cfg.c.root, pname)
        local bin = action_utils.create(cfg.c, pname, root)

        local build_cmd = "cd " .. root .. " && cmake -S . -B build"
        local _ = vim.system({ "sh", "-c", build_cmd }):wait()

        utils.init_git(root, "c")

        vim.cmd.edit(vim.fn.fnameescape(bin))
    end)
end

function M.create_file(opts)
    vim.ui.input({ prompt = "Enter type (c/h): " }, function(ft)
        ft = ft and vim.trim(ft)
        if not ft or ft == "" then
            return
        end
        local configs = require("vern.configs.c")
        ---@type VernCConfig
        local cfg = vim.tbl_deep_extend("force", {}, configs, opts or {})
        vim.ui.input({ prompt = "Enter file name: " }, function(fname)
            local root = join(vim.fn.expand(cfg.workspace_root), cfg.c.root, utils.proj_name())
            local input_txt = fname
            ft = ft and vim.trim(ft)
            if not ft or ft == "" then
                return
            end
            local mod
            if ft == "c" then
                mod = cfg.c.templates.file.source or {}
            end
            if ft == "h" then
                mod = cfg.c.templates.file.header or {}
                input_txt = fname:upper()
            end
            local raw_path = join(mod.path, mod.name)
            local context = { project_name = utils.proj_name(), name = fname }
            local path = utils.resolve_path(raw_path, cfg.c.dirs or {}, context)
            local abs_file_path = vim.fs.normalize(join(root, path))
            if ft == "h" then
                local abs_dir_path = vim.fs.dirname(abs_file_path)
                if abs_dir_path ~= root and not vim.startswith(root, abs_dir_path) then
                    vim.fn.mkdir(abs_dir_path, "p")
                end
            end
            utils.dump(abs_file_path, templates.fetch(mod.kind_path, mod.kind, input_txt))
            vim.cmd.edit(vim.fn.expand(abs_file_path))
        end)
    end)
end

---@param opts? VernCConfig Takes a table for the runtime
function M.run(opts)
    opts = opts or {}
    local root = utils.proj_root() or "."
    local pname = vim.fs.basename(root)

    local build_dir = root .. "/build"
    local build_cmd = "cd " .. build_dir .. " && cmake --build ."

    vim.system({ "sh", "-c", build_cmd }, { text = true }, function(obj)
        if obj.code ~= 0 then
            vim.schedule(function()
                local error_obj = (obj.stderr ~= "" and obj.stderr) or obj.stdout or ""
                local error_lines = vim.list_extend(
                    { "Error During compilation" },
                    vim.split(error_obj, "\n", { trimempty = true })
                )
                local buf, _ = utils.term({ "echo 'compilation failed'" }, opts.terminal, true)
                if buf and vim.api.nvim_buf_is_valid(buf) then
                    vim.api.nvim_set_option_value("modifiable", true, { buf = buf })
                    vim.api.nvim_buf_set_lines(buf, 0, -1, false, error_lines)
                    vim.api.nvim_set_option_value("modifiable", false, { buf = buf })
                end
            end)
        else
            vim.schedule(function()
                local run_cmd = "cd '" .. build_dir .. "' && ./" .. pname
                utils.term({ run_cmd }, opts.terminal, false)
            end)
        end
    end)
end

return M