<?php

declare(strict_types=1);

namespace app\adminapi\logic\finance;

use app\adminapi\logic\dept\DeptLogic;
use app\common\logic\BaseLogic;
use app\common\model\dept\Dept;
use app\common\model\finance\DeptPerformanceTarget;
use app\common\service\DataScope\DataScopeService;
use think\facade\Db;

class DeptPerformanceTargetLogic extends BaseLogic
{
    /**
     * 指定月份：保留部门树层级 + 合并当月已有目标
     *
     * @return array{year_month: string, rows: array<int, array<string, mixed>>, total_target: float, data_scope_limited: bool}
     */
    public static function monthMatrix(string $yearMonth, int $adminId = 0, array $adminInfo = []): array
    {
        $tree = DeptLogic::getAllData();
        $allowed = DataScopeService::getAllowedDeptIdSet($adminId, $adminInfo);
        $scoped = $allowed !== null;
        if ($scoped) {
            $tree = self::filterDeptTreeAllowedForest(is_array($tree) ? $tree : [], $allowed);
        }

        $rowsDb = DeptPerformanceTarget::where('year_month', $yearMonth)
            ->select()
            ->toArray();
        $targets = [];
        foreach ($rowsDb as $r) {
            $targets[(int) ($r['dept_id'] ?? 0)] = $r;
        }

        $rows = self::attachTargetsToTree(is_array($tree) ? $tree : [], $targets);
        $total = self::sumTargetsInTree($rows);

        return [
            'year_month'           => $yearMonth,
            'rows'                 => $rows,
            'total_target'         => round($total, 2),
            'data_scope_limited'   => $scoped,
        ];
    }

    /**
     * @param array<int, array{dept_id?:int|float|string, target_amount?:int|float|string, remark?:string}> $items
     */
    public static function batchSave(string $yearMonth, array $items, int $adminId, array $adminInfo, string $adminName): bool
    {
        $allowed = DataScopeService::getAllowedDeptIdSet($adminId, $adminInfo);

        try {
            Db::transaction(function () use ($yearMonth, $items, $adminId, $adminName, $allowed): void {
                foreach ($items as $item) {
                    if (!is_array($item)) {
                        continue;
                    }
                    $deptId = (int) ($item['dept_id'] ?? 0);
                    if ($deptId <= 0) {
                        continue;
                    }
                    // 仅处理 data scope 内的 dept_id（界面树与 monthMatrix 一致，不再含纯展示用父级）
                    if ($allowed !== null && !isset($allowed[$deptId])) {
                        continue;
                    }
                    $dept = Dept::where('id', $deptId)->whereNull('delete_time')->find();
                    if (!$dept) {
                        continue;
                    }
                    $deptName = trim((string) ($dept->name ?? ''));
                    $amt = round((float) ($item['target_amount'] ?? 0), 2);
                    $remark = mb_substr(trim((string) ($item['remark'] ?? '')), 0, 255);

                    if ($amt <= 0) {
                        DeptPerformanceTarget::where('dept_id', $deptId)
                            ->where('year_month', $yearMonth)
                            ->delete();

                        continue;
                    }

                    $row = DeptPerformanceTarget::where('dept_id', $deptId)
                        ->where('year_month', $yearMonth)
                        ->find();
                    if ($row) {
                        $row->dept_name = $deptName;
                        $row->target_amount = $amt;
                        $row->remark = $remark;
                        $row->updater_id = $adminId;
                        $row->updater_name = $adminName;
                        $row->save();
                    } else {
                        DeptPerformanceTarget::create([
                            'dept_id'       => $deptId,
                            'dept_name'     => $deptName,
                            'year_month'    => $yearMonth,
                            'target_amount' => $amt,
                            'remark'        => $remark,
                            'creator_id'    => $adminId,
                            'creator_name'  => $adminName,
                            'updater_id'    => $adminId,
                            'updater_name'  => $adminName,
                        ]);
                    }
                }
            });

            return true;
        } catch (\Throwable $e) {
            self::setError($e->getMessage());

            return false;
        }
    }

    /**
     * @param array<int, array<string, mixed>> $nodes  DeptLogic::getAllData 子树
     * @param array<int, array<string, mixed>> $targets keyed by dept_id
     *
     * @return array<int, array<string, mixed>>
     */
    private static function attachTargetsToTree(array $nodes, array $targets, string $prefix = ''): array
    {
        $out = [];
        foreach ($nodes as $n) {
            if (!is_array($n)) {
                continue;
            }
            $id = (int) ($n['id'] ?? 0);
            $name = trim((string) ($n['name'] ?? ''));
            if ($id <= 0) {
                continue;
            }
            $path = $prefix === '' ? $name : $prefix . ' / ' . $name;
            $t = $targets[$id] ?? null;
            $amt = $t ? round((float) $t['target_amount'], 2) : 0.0;
            $node = [
                'dept_id'       => $id,
                'dept_name'     => $name,
                'dept_path'     => $path,
                'target_id'     => $t ? (int) $t['id'] : 0,
                'target_amount' => $amt,
                'remark'        => $t ? (string) ($t['remark'] ?? '') : '',
            ];
            $rawChildren = $n['children'] ?? [];
            $childList = is_array($rawChildren) && $rawChildren !== []
                ? self::attachTargetsToTree($rawChildren, $targets, $path)
                : [];
            if ($childList !== []) {
                $node['children'] = $childList;
            }
            $out[] = $node;
        }

        return $out;
    }

    /**
     * @param array<int, array<string, mixed>> $nodes
     */
    private static function sumTargetsInTree(array $nodes): float
    {
        $s = 0.0;
        foreach ($nodes as $n) {
            $s += (float) ($n['target_amount'] ?? 0);
            $ch = $n['children'] ?? [];
            if (is_array($ch) && $ch !== []) {
                $s += self::sumTargetsInTree($ch);
            }
        }

        return $s;
    }

    /**
     * 本部门及以下：仅展示 allowed 内节点；无权父级不渲染，从子树中接续（不露出公司/上级中心）。
     *
     * @param array<int, array<string, mixed>> $nodes
     * @param array<int, true>                 $allowedMap
     *
     * @return array<int, array<string, mixed>>
     */
    private static function filterDeptTreeAllowedForest(array $nodes, array $allowedMap): array
    {
        if ($allowedMap === []) {
            return [];
        }
        $out = [];
        foreach ($nodes as $n) {
            if (!is_array($n)) {
                continue;
            }
            $id = (int) ($n['id'] ?? 0);
            if ($id <= 0) {
                continue;
            }
            $rawChildren = $n['children'] ?? [];
            $kids = is_array($rawChildren) ? $rawChildren : [];

            if (isset($allowedMap[$id])) {
                $childList = [];
                foreach ($kids as $c) {
                    if (!is_array($c)) {
                        continue;
                    }
                    foreach (self::filterDeptTreeAllowedForest([$c], $allowedMap) as $item) {
                        $childList[] = $item;
                    }
                }
                $node = $n;
                if ($childList !== []) {
                    $node['children'] = $childList;
                } else {
                    unset($node['children']);
                }
                $out[] = $node;

                continue;
            }

            foreach ($kids as $c) {
                if (!is_array($c)) {
                    continue;
                }
                foreach (self::filterDeptTreeAllowedForest([$c], $allowedMap) as $item) {
                    $out[] = $item;
                }
            }
        }

        return $out;
    }
}