#+vet explicit-allocators
package main

import "core:fmt"
import vmem "core:mem/virtual"
import "core:os"
import "core:strings"
import "core:time"

print_usage :: proc() {
	fmt.println("Usage:\n\tcm [working dir] [output dir]\nNote:USE FULL PATH!")
	os.exit(0)
}

main :: proc() {
	arena: vmem.Arena
	arena_err := vmem.arena_init_growing(&arena)
	ensure(arena_err == nil)
	arena_alloc := vmem.arena_allocator(&arena)
	defer vmem.arena_destroy(&arena) //clean up everything!

	if len(os.args) <= 2 || len(os.args) > 3 {
		print_usage()
		return
	}

	directory := os.args[1]
	output_dir := os.args[2]

	start := time.tick_now() //start timer for footer

	generate_blog_md_file(directory, arena_alloc)

	md_files := walk_tree_and_get_md_names(directory, arena_alloc)
	for file, i in md_files {
		os.change_directory(directory)
		//fmt.printfln("INFO: Parsing %s from .MD to HTML...", file)

		html, parse_err := parse_file_md_to_html(file, arena_alloc)
		if parse_err != nil {
			fmt.eprintfln("ERROR: Could not open file %s: %s", file, os.error_string(parse_err))
		}

		filename := strings.split(file, directory, arena_alloc)
		//fmt.printfln("INFO: filename: %s", filename)
		trimmed_filename := strings.trim_right(filename[1], ".md")
		//fmt.printfln("INFO: trimmed_filename: %s", trimmed_filename)

		//Change to output directory...
		os.change_directory(output_dir)

		//print html file name
		sb := strings.builder_make(arena_alloc) //sb for writing to files, resets ever iteration
		strings.write_string(&sb, fmt.aprintf("%v", trimmed_filename, allocator = arena_alloc))
		strings.write_string(&sb, ".html")

		//get "full" name for creation + writing to html file
		full_filename := strings.to_string(sb)
		file, file_err := os.create(full_filename)
		if file_err != nil {
			fmt.eprintfln("ERROR: Could not open file %s: %s", file, os.error_string(file_err))
		}

		write_prefixs_to_html_file(file)
		os.write_string(file, html) //WRITE PAGE

		switch trimmed_filename {
		case "index":
			buf: [1024]u8
			date := time.now()
			end := time.tick_since(start)

			os.write_string(file, "<br><footer><hr />This site was generated με αγάπη on ")
			os.write_string(
				file,
				fmt.aprintf("%s ", time.to_string_dd_mm_yy(date, buf[:]), allocator = arena_alloc),
			)
			os.write_string(
				file,
				fmt.aprintf(
					"in %v ",
					time.duration_round(end, time.Nanosecond),
					allocator = arena_alloc,
				),
			)
			os.write_string(file, "<font color=#ea76cb><3</font> </footer><br>")

		}
	}

}