<?php

namespace App\Support;

use App\Models\Campaign;
use App\Models\Call;
use App\Models\FollowUp;
use App\Models\Lead;
use App\Models\Team;
use App\Models\User;
use Illuminate\Database\Eloquent\Builder;

class AccessControl
{
    public static function canAccessLead(User $user, Lead $lead, bool $allowUnassignedClaim = false): bool
    {
        if ($user->hasRole('admin')) {
            return true;
        }

        if ($user->hasRole('agent')) {
            return $lead->assigned_to === $user->id
                || ($allowUnassignedClaim && is_null($lead->assigned_to) && (bool) $lead->is_unassigned);
        }

        if ($user->hasRole('supervisor')) {
            return $lead->assigned_to === $user->id
                || in_array($lead->team_id, self::teamIds($user), true)
                || (is_null($lead->team_id) && is_null($lead->assigned_to));
        }

        return false;
    }

    public static function canAccessCall(User $user, Call $call): bool
    {
        if ($user->hasRole('admin')) {
            return true;
        }

        if ($user->hasRole('agent')) {
            return $call->user_id === $user->id;
        }

        if ($user->hasRole('supervisor')) {
            return in_array($call->user_id, self::teamMemberIds($user), true)
                || ($call->lead && self::canAccessLead($user, $call->lead));
        }

        return false;
    }

    public static function canAccessFollowUp(User $user, FollowUp $followUp): bool
    {
        if ($user->hasRole('admin')) {
            return true;
        }

        if ($user->hasRole('agent')) {
            return $followUp->user_id === $user->id;
        }

        if ($user->hasRole('supervisor')) {
            return in_array($followUp->user_id, self::teamMemberIds($user), true)
                || ($followUp->lead && self::canAccessLead($user, $followUp->lead));
        }

        return false;
    }

    public static function canAccessCampaign(User $user, Campaign $campaign): bool
    {
        if ($user->hasRole('admin')) {
            return true;
        }

        if ($user->hasRole('agent')) {
            return $campaign->assignedAgents()->whereKey($user->id)->exists()
                || $campaign->leads()->where('assigned_to', $user->id)->exists();
        }

        if ($user->hasRole('supervisor')) {
            $teamIds = self::teamIds($user);

            return $campaign->assignedSupervisors()->whereKey($user->id)->exists()
                || $campaign->leads()->whereIn('team_id', $teamIds)->exists();
        }

        return false;
    }

    public static function scopeLeads(Builder $query, User $user, bool $allowUnassignedForSupervisor = true): Builder
    {
        if ($user->hasRole('admin')) {
            return $query;
        }

        if ($user->hasRole('agent')) {
            return $query->where('assigned_to', $user->id);
        }

        if ($user->hasRole('supervisor')) {
            $teamIds = self::teamIds($user);

            return $query->where(function (Builder $q) use ($user, $teamIds, $allowUnassignedForSupervisor): void {
                $q->whereIn('team_id', $teamIds)
                    ->orWhere('assigned_to', $user->id);

                if ($allowUnassignedForSupervisor) {
                    $q->orWhere(function (Builder $unassigned): void {
                        $unassigned->whereNull('team_id')->whereNull('assigned_to');
                    });
                }
            });
        }

        return $query->whereRaw('1 = 0');
    }

    public static function scopeCalls(Builder $query, User $user): Builder
    {
        if ($user->hasRole('admin')) {
            return $query;
        }

        if ($user->hasRole('agent')) {
            return $query->where('user_id', $user->id);
        }

        if ($user->hasRole('supervisor')) {
            return $query->where(function (Builder $q) use ($user): void {
                $q->whereIn('user_id', self::teamMemberIds($user))
                    ->orWhereHas('lead', fn(Builder $leadQuery) => self::scopeLeads($leadQuery, $user));
            });
        }

        return $query->whereRaw('1 = 0');
    }

    public static function scopeFollowUps(Builder $query, User $user): Builder
    {
        if ($user->hasRole('admin')) {
            return $query;
        }

        if ($user->hasRole('agent')) {
            return $query->where('user_id', $user->id);
        }

        if ($user->hasRole('supervisor')) {
            return $query->where(function (Builder $q) use ($user): void {
                $q->whereIn('user_id', self::teamMemberIds($user))
                    ->orWhereHas('lead', fn(Builder $leadQuery) => self::scopeLeads($leadQuery, $user));
            });
        }

        return $query->whereRaw('1 = 0');
    }

    public static function scopeCampaigns(Builder $query, User $user): Builder
    {
        if ($user->hasRole('admin')) {
            return $query;
        }

        if ($user->hasRole('agent')) {
            return $query->where(function (Builder $q) use ($user): void {
                $q->whereHas('assignedAgents', fn(Builder $agentQuery) => $agentQuery->whereKey($user->id))
                    ->orWhereHas('leads', fn(Builder $leadQuery) => $leadQuery->where('assigned_to', $user->id));
            });
        }

        if ($user->hasRole('supervisor')) {
            $teamIds = self::teamIds($user);

            return $query->where(function (Builder $q) use ($user, $teamIds): void {
                $q->whereHas('assignedSupervisors', fn(Builder $supervisorQuery) => $supervisorQuery->whereKey($user->id))
                    ->orWhereHas('leads', fn(Builder $leadQuery) => $leadQuery->whereIn('team_id', $teamIds));
            });
        }

        return $query->whereRaw('1 = 0');
    }

    public static function teamIds(User $user): array
    {
        return $user->teams()->pluck('teams.id')->all();
    }

    public static function teamMemberIds(User $user): array
    {
        $teamIds = self::teamIds($user);

        if (!$teamIds) {
            return [];
        }

        return Team::whereIn('id', $teamIds)
            ->with('members:id')
            ->get()
            ->pluck('members.*.id')
            ->flatten()
            ->unique()
            ->values()
            ->all();
    }
}