--!strict
local fs = require("@lune/fs")

local common = require("./common")
local progress_bar = require("@pkg/progress")
local result = require("@pkg/result")

local function setup(name: string, force: boolean): result.Identity<nil>
    local progress = progress_bar
        .new()
        :with_stage("init", "Initializing")
        :with_stage("prepare", "Cleaning up defaults")
        :with_stage("modify", "Replacing default names")
        :with_stage("generate", "Generating .sln")
    progress:start() -- init

    if not fs.metadata(`{common.default_name}.sln`).exists and not force then
        progress:stop()
        return result(false, "Aborting -- the template is already set up.")
    end

    progress:next_stage() -- prepare

    fs.removeFile(`{common.default_name}.sln`)
    fs.removeFile(`PROJECT-SETUP.md`)

    progress:next_stage() -- modify

    fs.move(`src/{common.default_name}.cs`, `src/{name}.cs`)
    fs.move(`src/{common.default_name}.csproj`, `src/{name}.csproj`)

    do
        local main_src = fs.readFile(`src/{name}.cs`)
        local edited_src = string.gsub(main_src, common.default_name, name)
        fs.writeFile(`src/{name}.cs`, edited_src)
    end

    progress:next_stage() -- generate

    do
        local res = common.spawn(`dotnet new sln --name {name}`)
        if not res.ok then
            return result(false, `Failed to create new sln:\n{res.err}`)
        end
    end

    do
        local res = common.spawn("dotnet sln add src")
        if not res.ok then
            return result(false, `Failed to add src to sln:\n{res.err}`)
        end
    end

    do
        local sln_src = fs.readFile(`{name}.sln`)
        local by_line = string.split(sln_src, "\n")
        for _ = 1, 3 do
            table.remove(by_line, 3)
        end
        local concated = table.concat(by_line, "\n")
        fs.writeFile(`{name}.sln`, concated)
    end

    progress:stop() -- finish

    return result(true, nil)
end

return setup