<?php

namespace NoccyLabs\JsonEdit\List;

use Countable;
use NoccyLabs\JsonEdit\Settings;
use NoccyLabs\JsonEdit\Tree\ArrayNode;
use NoccyLabs\JsonEdit\Tree\CollapsibleNode;
use NoccyLabs\JsonEdit\Tree\Tree;
use NoccyLabs\JsonEdit\Tree\Node;
use NoccyLabs\JsonEdit\Tree\ObjectNode;
use NoccyLabs\JsonEdit\Tree\ValueNode;

class TreeList implements Countable
{
    /** @var array<string,Entry> */
    public array $list = [];

    private const TREE_FOLD_OPEN = "\u{f0fe}";
    private const TREE_FOLD_CLOSE = "\u{f146}";
    private const TREE_INDENT_GUIDE = "\u{258f} ";
    private const TREE_INDENT = "  ";

    public function __construct(private Tree $tree)
    {
    }

    public function count(): int
    {
        return count($this->list);
    }

    public function parseTree(): void
    {
        $this->list = [];
        $this->parseNode($this->tree->root, [], null);
    }

    private function parseNode(Node $node, array $path, string|int|null $key): void
    {
        if (str_contains($key, '/')) {
            $ekey = urlencode($key);
        } else {
            $ekey = $key;
        }

        $level = count($path);
        $entryKey = join("/", $path) . (is_null($key) ? "/" : (is_int($key) ? sprintf("/%d", $key) : sprintf("/%s", $ekey)));

        $entry = new Entry(depth: $level, key: $key, node: $node);

        $this->list[$entryKey] = $entry;

        if ($node instanceof ArrayNode) {
            $index = 0;
            if ($node->isCollapsed()) return;
            foreach ($node->items as $item) {
                $this->parseNode($item, [ ...$path, $key ], $index++);
            }
            if (!Settings::$compactGroups)
                $this->list[$entryKey.'$'] = new Entry(depth: $level, key: $key, node: $node, closer: true);
        } elseif ($node instanceof ObjectNode) {
            if ($node->isCollapsed()) return;
            foreach ($node->properties as $nodekey=>$item) {
                $this->parseNode($item, [ ...$path, $key ], $nodekey);
            }
            if (!Settings::$compactGroups)
                $this->list[$entryKey.'$'] = new Entry(depth: $level, key: $key, node: $node, closer: true);

        }
    }

    public function getPathForIndex(int $index): ?string
    {
        return array_keys($this->list)[$index]??null;
    }

    public function getIndexForPath(string $path): ?int
    {
        return array_search($path, array_keys($this->list));
    }

    public function getNodeForPath(string $path): ?Node
    {
        $entry = $this->list[$path]??null;
        return $entry ? $entry->node : null;
    }

    public function getNodeForIndex(int $index): ?Node
    {
        $key = array_keys($this->list)[$index]??null;
        $entry = $this->list[$key]??null;
        if (!$entry) return null;
        return $entry->node;
    }

    public function getEntryForIndex(int $index): ?Entry
    {
        $key = array_keys($this->list)[$index]??null;
        $entry = $this->list[$key]??null;
        if (!$entry) return null;
        return $entry;
    }

    public function findNearestCollection(int $index, bool $ignoreSelf = false): ?int
    {
        $path = $this->getPathForIndex($index);
        if ($ignoreSelf) {
            $path = dirname($path);
        }
        while (strlen($path) > 0) {
            $entry = $this->list[$path];
            $node = $entry->node;
            if ($node instanceof ArrayNode || $node instanceof ObjectNode) {
                return $this->getIndexForPath($path);
            }
            $path = dirname($path);
        }

        // $depth = $this->getEntryForIndex($index)->depth;
        // if ($ignoreSelf) $depth = max(0, $depth - 1);
        // echo "{start={$depth}}"; sleep(1);
        // while ($index >= 0) {
        //     $entry = $this->getEntryForIndex($index);
        //     if ($entry->depth < $depth) {
        //         $node = $entry->node;
        //         if ($node instanceof ArrayNode || $node instanceof ObjectNode) {
        //             return $index;
        //         }
        //     }
        //     $index--;
        // }
        return null;
    }

    public function drawEntry(int $screenRow, int $entryRow, int $columns, bool $selected): void
    {

        $keys = array_keys($this->list);
        echo "\e[{$screenRow};1H";
        if ($entryRow >= count($keys)) {
            echo ($selected?"\e[44;97m":"\e[0;90m")."\e[K";
            if ($entryRow == count($keys)) echo str_repeat("\u{2574}",$columns);
            echo "\e[0m";
            //else echo "\e[90m\u{2805}\e[0m";
            return;
        }
        $key = $keys[$entryRow];
        if (!isset($this->list[$key])) {
            echo "\e[0m\e[K\e[31mE_NO_KEY_IN_LIST\e[0m";
            return;
        }
        $entry = $this->list[$key];
        if (!$entry) {
            echo "\e[0m\e[K\e[31mE_NO_ENTRY_IN_LIST\e[0m";
            return;
        }
        echo "\e[{$screenRow};1H\e[0m";
        echo ($selected?"\e[44;97m":"\e[0;37m")."\e[K";
        echo "\e[90m".str_repeat(
            Settings::$indentationGuides ? self::TREE_INDENT_GUIDE : self::TREE_INDENT,
            $entry->depth
        )."\e[37m";
        
        if ($entry->closer) {
            if (!Settings::$compactGroups) {
                if ($entry->node instanceof ArrayNode) {
                    echo "]";
                } elseif ($entry->node instanceof ObjectNode) {
                    echo "}";
                }          
            }
            return;      
        }
        
        if (Settings::$collapseBefore) {
            if ($entry->node instanceof CollapsibleNode) {
                if ($entry->node->isCollapsed()) {
                    //echo "\e[90m\u{25ba} \e[37m";
                    echo "\e[90m".self::TREE_FOLD_OPEN." \e[37m";
                } else {
                    //echo "\e[90m\u{25bc} \e[37m";
                    echo "\e[90m".self::TREE_FOLD_CLOSE." \e[37m";
                }
            }
        }

        if (!is_null($entry->key)) {
            echo (is_int($entry->key)
                ?"\e[36;2m\u{e0b6}\e[7m#{$entry->key}\e[27m\u{e0b4}\e[22;37m "
                :(Settings::$editorQuotedKeys
                    ? "\e[36m\"{$entry->key}\":\e[37m "
                    : "\e[36m{$entry->key}:\e[37m "
                ));
        }
        if ($entry->node instanceof ArrayNode) {
            echo "[" . (Settings::$compactGroups ? "…]":"");
            if ($entry->node->isCollapsed()) {
                if (!Settings::$collapseBefore) echo " \e[90m\u{25ba}";
                echo " \e[90;2m[".count($entry->node->items)."]\e[22m";
                if (!Settings::$compactGroups) echo "\e[37m ]";
            } else {
                if (!Settings::$collapseBefore) echo " \e[90m\u{25bc}";
            }
        } elseif ($entry->node instanceof ObjectNode) {
            echo "{" . (Settings::$compactGroups ? "…}":"");
            if ($entry->node->isCollapsed()) {
                if (!Settings::$collapseBefore) echo " \e[90m\u{25ba}";
                echo " \e[90;2;3m".join(", ",array_keys($entry->node->properties))."\e[22;23m";
                if (!Settings::$compactGroups) echo "\e[37m }";
            } else {
                if (!Settings::$collapseBefore) echo " \e[90m\u{25bc}";
            }
        } elseif ($entry->node instanceof ValueNode) {
            $value = $entry->node->value;
            echo match (gettype($value)) {
                'string' => "\e[33m",
                'integer' => "\e[34m",
                'double' => "\e[32m",
                'boolean' => "\e[35m",
                'NULL' => "\e[31m",
                default => "",
            };
            echo json_encode($entry->node->value, JSON_UNESCAPED_SLASHES|JSON_UNESCAPED_UNICODE);
        }
        
    }

}